CN101839123B - Exploitation method for wax precipitation oil reservoir - Google Patents
Exploitation method for wax precipitation oil reservoir Download PDFInfo
- Publication number
- CN101839123B CN101839123B CN 201010133125 CN201010133125A CN101839123B CN 101839123 B CN101839123 B CN 101839123B CN 201010133125 CN201010133125 CN 201010133125 CN 201010133125 A CN201010133125 A CN 201010133125A CN 101839123 B CN101839123 B CN 101839123B
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- Prior art keywords
- oil
- oil reservoir
- liquid
- well
- hot fluid
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 308
- 238000001556 precipitation Methods 0.000 title claims abstract description 301
- 239000003921 oil Substances 0.000 claims abstract description 1180
- 239000012530 fluid Substances 0.000 claims abstract description 424
- 239000003129 oil well Substances 0.000 claims abstract description 386
- 239000013043 chemical agent Substances 0.000 claims abstract description 348
- 239000010779 crude oil Substances 0.000 claims abstract description 323
- 238000004519 manufacturing process Methods 0.000 claims abstract description 75
- 238000011084 recovery Methods 0.000 claims abstract description 43
- 235000019198 oils Nutrition 0.000 claims description 1173
- 239000007788 liquid Substances 0.000 claims description 452
- 239000001993 wax Substances 0.000 claims description 435
- QPUYECUOLPXSFR-UHFFFAOYSA-N 1-methylnaphthalene Chemical compound C1=CC=C2C(C)=CC=CC2=C1 QPUYECUOLPXSFR-UHFFFAOYSA-N 0.000 claims description 268
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 205
- 239000000203 mixture Substances 0.000 claims description 152
- 239000003795 chemical substances by application Substances 0.000 claims description 126
- 239000000126 substance Substances 0.000 claims description 123
- 239000004094 surface-active agent Substances 0.000 claims description 113
- 238000002347 injection Methods 0.000 claims description 106
- 239000007924 injection Substances 0.000 claims description 106
- 238000002156 mixing Methods 0.000 claims description 81
- 239000000463 material Substances 0.000 claims description 66
- 238000006243 chemical reaction Methods 0.000 claims description 61
- 238000006073 displacement reaction Methods 0.000 claims description 60
- -1 sodium alkyl sulfonate Chemical class 0.000 claims description 57
- 239000004480 active ingredient Substances 0.000 claims description 56
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- 229910052708 sodium Inorganic materials 0.000 claims description 43
- 238000010438 heat treatment Methods 0.000 claims description 40
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 38
- 239000012188 paraffin wax Substances 0.000 claims description 38
- 239000000243 solution Substances 0.000 claims description 35
- 239000003208 petroleum Substances 0.000 claims description 33
- 229920001577 copolymer Polymers 0.000 claims description 32
- 230000008014 freezing Effects 0.000 claims description 30
- 238000007710 freezing Methods 0.000 claims description 30
- 239000011261 inert gas Substances 0.000 claims description 30
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 29
- QIMMUPPBPVKWKM-UHFFFAOYSA-N 2-methylnaphthalene Chemical compound C1=CC=CC2=CC(C)=CC=C21 QIMMUPPBPVKWKM-UHFFFAOYSA-N 0.000 claims description 28
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 28
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- 230000000994 depressogenic effect Effects 0.000 claims description 20
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 19
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 18
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 18
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- 239000002904 solvent Substances 0.000 claims description 17
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 16
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 12
- 238000005660 chlorination reaction Methods 0.000 claims description 12
- 150000002430 hydrocarbons Chemical class 0.000 claims description 12
- 239000011976 maleic acid Substances 0.000 claims description 12
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 12
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- IOVCWXUNBOPUCH-UHFFFAOYSA-M nitrite group Chemical group N(=O)[O-] IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 9
- QNLZIZAQLLYXTC-UHFFFAOYSA-N 1,2-dimethylnaphthalene Chemical compound C1=CC=CC2=C(C)C(C)=CC=C21 QNLZIZAQLLYXTC-UHFFFAOYSA-N 0.000 claims description 8
- 229910002651 NO3 Inorganic materials 0.000 claims description 8
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 8
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 8
- 239000012075 bio-oil Substances 0.000 claims description 8
- 239000003876 biosurfactant Substances 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 150000007942 carboxylates Chemical class 0.000 claims description 8
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 8
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- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 7
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- 125000002091 cationic group Chemical group 0.000 claims description 7
- 238000005336 cracking Methods 0.000 claims description 7
- 238000011282 treatment Methods 0.000 claims description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 6
- 241000894006 Bacteria Species 0.000 claims description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 6
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 6
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 6
- 229920000570 polyether Polymers 0.000 claims description 6
- 239000001103 potassium chloride Substances 0.000 claims description 6
- 235000011164 potassium chloride Nutrition 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 6
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000001099 ammonium carbonate Substances 0.000 claims description 5
- 235000012501 ammonium carbonate Nutrition 0.000 claims description 5
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- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 239000004604 Blowing Agent Substances 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
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- 235000007164 Oryza sativa Nutrition 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
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- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 4
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- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 claims description 4
- CYDRXTMLKJDRQH-UHFFFAOYSA-N benzododecinium Chemical compound CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 CYDRXTMLKJDRQH-UHFFFAOYSA-N 0.000 claims description 4
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- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 4
- JRBPAEWTRLWTQC-UHFFFAOYSA-O dodecylazanium Chemical compound CCCCCCCCCCCC[NH3+] JRBPAEWTRLWTQC-UHFFFAOYSA-O 0.000 claims description 4
- VICYBMUVWHJEFT-UHFFFAOYSA-N dodecyltrimethylammonium ion Chemical compound CCCCCCCCCCCC[N+](C)(C)C VICYBMUVWHJEFT-UHFFFAOYSA-N 0.000 claims description 4
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Abstract
The invention discloses an exploitation method for a wax precipitation oil reservoir. The method comprises the step of adding a chemical agent and thermal fluid into an oil layer to make crude oil in the oil layer smoothly seep into an oil well and then rise to the ground surface. The method has the advantages of effectively solving the problem of wax precipitation of the crude oil in the oil layer and exploiting the wax precipitation oil reservoir, greatly reducing the exploitation cost of the wax precipitation oil reservoir, prolonging the production period and increasing the yield of the oil well and enhancing the final recovery efficiency of the oil reservoir, along with easy implementation, safety and reliability and obvious economic benefit.
Description
Technical field
The present invention relates to a kind of crude oil production method, especially a kind of exploitation method for wax precipitation oil reservoir.
Background technology
At present, in the crude oil production exploitation, exploit wax precipitation oil reservoir inevitably.Such wax precipitation oil reservoir or because original temperature is contained the wax precipitation temperature of crude oil smaller or equal to this oil reservoir, the crude oil of containing has produced or separated out the wax crystalline substance under the oil reservoir initial condition; Though perhaps such wax precipitation oil reservoir original temperature is higher than the wax precipitation temperature that this oil reservoir is contained crude oil, but its crude oil of containing can be because the vaporization heat absorption of lighter hydrocarbons, natural gas and cause crude oil temperature to be lower than its wax precipitation temperature during seepage flow in oil reservoir, and crude oil produces or separate out the wax crystalline substance in flow event; Though perhaps such wax precipitation oil reservoir original temperature is higher than the wax precipitation temperature that this oil reservoir is contained crude oil, because the temperature of outside fluid is lower than the wax precipitation temperature of crude oil that such wax precipitation oil reservoir is contained and causes crude oil to produce or separate out the wax crystalline substance in oil reservoir; In other words, the maximum feature of such wax precipitation oil reservoir is: possibility also may inevitably cause crude oil to separate out the wax crystalline substance in oil reservoir because of exploitation such wax precipitation oil reservoir process itself because self original temperature is lower than it to be contained the wax precipitation temperature of crude oil and cause crude oil to separate out the wax crystalline substance in oil reservoir; Therefore the crude oil in such wax precipitation oil reservoir very easily produces or separates out the wax crystalline substance in oil reservoir, produce or separate out the obstruction that the wax crystalline substance very easily causes near oil reservoir oil reservoir or the oil well, perhaps cause the viscosity of crude oil in oil reservoir to increase, thereby influence crude oil flowing in (seepage flow) in oil reservoir, influence the oil well ordinary production; If do not take effective method, such oil layer wax-condensing type oil reservoir exploitation difficulty is very big, and cost of winning is high, can cause whole oil reservoir normally to exploit when serious, causes a large amount of energy wastes and economic loss.
Methods such as the dynamic liquid method of method of existing exploitation wax precipitation oil reservoir, steaming process, microbial method, shaft bottom electromagnetic method, oil reservoir electrothermal way, ripple method, artificial earthquake method, Splitting Method, medical method, water flood all have different defectives.
The power fluid method is that the high pressure-temperature crude oil that will produce on ground injects oil well as power fluid, utilize energy and the hydraulics such as the jet pump in the oil well, hydraulic piston pump of power fluid that the crude oil in the pit shaft is promoted to ground, prevent that crude oil from analysing wax and solidifying in pit shaft.Because this method can only be injected well wellbore with power fluid, just power fluid injects oil reservoir, can only solve the pit shaft problem, the crude oil that can not solve in the oil reservoir of wax precipitation oil reservoir deep is analysed the wax problem, and with high costs, so domestic present not this method of large-scale promotion application in the wax precipitation oil reservoir exploitation.
Steaming process is that high temperature and high pressure steam is injected oil reservoir, utilizes the heat heating wax precipitation oil reservoir of steam self, utilizes heating power with the brilliant fusing of the wax of separating out in the oil reservoir, reduces viscosity of crude.This method is directly used in wax precipitation oil reservoir and has following defective: the one, and seriously restricted by the reservoir geology complicated condition, it is big to inject the steam difficulty; The 2nd, can produce dysgenic wax precipitation oil reservoir to oil reservoir for those high temperature is that the serious wax precipitation oil reservoir of thermal sensitivity is difficult to use in a large number high temperature and high pressure steam; The 3rd, in whole oil recovery process, must keep whole wax precipitation oil reservoir temperature and crude oil temperature to be higher than the wax precipitation temperature of crude oil far away always, not only to consume a large amount of steam for this reason, and because the oil reservoir thermal capacitance is very big, radiation loss is serious and inevitable, and reservoir temperature is difficult to be guaranteed; The 4th, steaming process complex process, vapor (steam) temperature, mass dryness fraction and reservoir temperature field control difficulty; The 5th, this method requires the temperature of steam more high more good, vapor (steam) temperature is more high, corresponding expense is more low, not only cost height but also effect are relatively poor to be lower than 200 ℃ steam, and vapor (steam) temperature Gao Zehui causes the conventional oil well shaft phenomenon of expanding with heat and contract with cold serious, can cause very big destruction to common oil well casing programme, the pilot production proof is difficult to the high-temperature steam more than 200 ℃ is directly used in common oil well; The 6th, the scale problems of water when producing steam in order to solve must be softened specially to the water that produces steam, causes the production of steam expense significantly to increase; The 7th, the generation of steam need consume a large amount of energy, and must adopt special thermal recovery structure of oil well design, can cause oil well construction costs such as oilwell drilling, well cementation, completion to be multiplied, thereby cause cost for oil production significantly to rise, and energy consumption significantly increases.Therefore, though this method has obtained large-scale application in the thickened oil recovery at home, also carry out overtesting at wax precipitation oil reservoir, can't realize practicability, be difficult to apply.
Open source information shows: quiet 35 of Liaohe Oil Field belongs to wax precipitation oil reservoir, the pilot production of this block proves: inject the high-temperature steam more than 200 ℃ in the common oil well applying steam normal direction oil well of this block, can cause well mouth of oil well expansion rising 1-2 rice, can cause irreversible very big destruction to oil well casing, well cementation section, serious meeting causes sleeve pipe gross distortion, oil well to be scrapped, and can't apply at this block.
Microbial method is that microorganism is injected wax precipitation oil reservoir, and the effect that utilizes microorganism can consume, decompose paraffin reduces wax content in crude oil, solves the analyse wax problem of crude oil in oil reservoir.This method is directly used in wax precipitation oil reservoir and has following defective: the one, and seriously restricted by the reservoir geology complicated condition, microorganism survival rate, breeding potential in wax precipitation oil reservoir is low, cause microbial consumption wax molecule limited in one's ability, so this method is limited for the high crude oil effect of paraffin content; The 2nd, microorganism needs the very long paraffin content that could effectively reduce crude oil in the oil reservoir breeding period also and then reduces its wax precipitation temperature, so this method can cause the oil well effective production time significantly to reduce.Therefore, this method is used for wax precipitation oil reservoir separately and is difficult to practicability, the domestic application example that does not also have success at present.
Open source information shows: quiet 35 of Liaohe Oil Field belongs to wax precipitation oil reservoir, and the pilot production of this block proves: microorganism is difficult to breeding fast in this reservoir oil layer, can not effectively solve the analyse wax problem of crude oil in oil reservoir, can't apply at this block.
Shaft bottom electromagnetic method, oil reservoir electrothermal way are that electric energy is converted into heat energy, utilize heat energy heating oil reservoir, utilize heating power with the brilliant fusing of the wax of separating out in the oil reservoir, reduce viscosity of crude.Because this method need consume a large amount of electric energy, be difficult to guarantee that reservoir temperature is higher than the dewaxing temperature, need complicated supporting technology, implement, management difficulty is big, with high costs, input-output ratio is low, therefore domesticly generally this method is used as shaft bottom de-plugging measure, be difficult to directly it is used for the wax precipitation oil reservoir exploitation on a large scale the domestic application example that does not also have success at present.
Open source information shows: quiet 35 of Liaohe Oil Field belongs to wax precipitation oil reservoir, the pilot production of this block proves: shaft bottom electromagnetic method, oil reservoir electrothermal way can not guarantee effectively that this block reservoir temperature is higher than the dewaxing temperature, can not effectively melt the wax crystalline substance in its oil reservoir, can not effectively solve the analyse wax problem of crude oil in oil reservoir, can't apply at this block.
The ripple method is that electric energy is converted into acoustic energy or microwave, utilizes its characteristic to handle oil reservoir, solves the analyse wax problem of crude oil in oil reservoir.Because this method need consume a large amount of electric energy, need complicated supporting technology, implement, management difficulty is big, domestic also successfully not carry out field trial at wax precipitation oil reservoir at present, and with high costs because of it, input-output ratio is low, the domestic present wax precipitation oil reservoir exploitation that is difficult to directly use it for.
Open source information shows: quiet 35 of Liaohe Oil Field belongs to wax precipitation oil reservoir, and the pilot production of this block proves: ripple method the analyse wax problem of crude oil in oil reservoir of can not can not efficient solution determining, can't apply at this block.
The artificial earthquake method is that other energy are converted into seismic wave input oil reservoir, utilizes its characteristic to handle oil reservoir, solves the analyse wax problem of crude oil in oil reservoir.Because this method can not effectively solve the analyse wax problem of crude oil in oil reservoir, domestic also successfully to carry out field trial at wax precipitation oil reservoir at present, and with high costs because of it, and input-output ratio is low, the domestic present wax precipitation oil reservoir exploitation that is difficult to directly use it for.
Open source information shows: quiet 35 of Liaohe Oil Field belongs to wax precipitation oil reservoir, and the pilot production of this block proves: the artificial earthquake method can not effectively solve the analyse wax problem of crude oil in oil reservoir, can't apply at this block.
Splitting Method is a kind of conventional oil recovery technique, is by transforming oil reservoir oil extraction to be come out.Because this method can not effectively solve the analyse wax problem of crude oil in oil reservoir, can only use as supporting technology, domestic present also of no use its carries out the precedent of wax precipitation oil reservoir exploitation separately.
Medical method is that chemical agents such as surfactant, pour-point depressant, thinner are added in the well wellbore, with prevent crude oil in wax deposition in pit shaft, solidify, improve the flow regime of crude oil in pit shaft.Because this method does not effectively add chemical agent in the oil reservoir, do not relate to yet, solve the problem that chemical agent is added oil reservoir, do not indicate the concrete technical scheme that chemical agent is effectively added oil reservoir yet, therefore this method can only solve the well wellbore problem, and the crude oil that can not solve in the wax precipitation oil reservoir oil reservoir is analysed the wax problem; Because mobile belong to microscopic seepage or the Capillary Flow of crude oil in oil reservoir, flowing in pit shaft then belong to macroscopical bassoon and directly flow, the two belongs to different technical fields, and difference is huge; Therefore, the crude oil that those skilled in the art can not utilize this medical method and open source information to solve in the wax precipitation oil reservoir oil reservoir is analysed the wax problem, can not effectively be solved the enlightenment that crude oil is analysed the wax problem in the wax precipitation oil reservoir oil reservoir from this medical method and open source information.Therefore, the precedent that domestic present also this method of no use is successfully carried out the wax precipitation oil reservoir exploitation, not this method of large-scale promotion application in the wax precipitation oil reservoir exploitation.
Open source information shows: quiet 35 of Liaohe Oil Field belongs to wax precipitation oil reservoir, but do not have clear and definite open source information to show at present chemical agent added can effectively solve in this block oil reservoir crude oil in this block oil reservoir and analyse the problem of wax, chemical agent is not added yet solve in this block oil reservoir crude oil in its oil reservoir analyse the public technology scheme of wax problem can be for reference; At present, this block also medical method of no use solves the pilot production precedent that crude oil in its oil reservoir is analysed the wax problem, also applies this method at this block.
Water flood is a kind of conventional oil recovery technique, is to utilize normal-temperature water or the hot water below 100 ℃ to improve the formation pressure energy, and the mother oil displacement in the oil reservoir is come out.This method is directly used in wax precipitation oil reservoir and has following defective:
1) the used maximum temperature of water on ground of this method is no more than 100 ℃, has been lower than 100 ℃ because of ground, the highest water temperature of pit shaft radiation loss when entering oil reservoir; Because the degree of porosity in the oil reservoir is difficult to surpass 30%, and dewaxing is an endothermic process, can further reduce water temperature; Relevant calculation shows: this hot water is difficult to guarantee that reservoir temperature is higher than the dewaxing temperature after entering oil reservoir, can not effectively melt the wax crystalline substance in the oil reservoir.
2) the used water of this method does not reduce the function of crude oil wax precipitation temperature, when its temperature in oil reservoir is lower than the crude oil wax precipitation point, can not suppresses the wax crystalline substance and grow up, stops up the oil reservoir hole; On the contrary, if enter the wax precipitation temperature that the water temperature of oil reservoir is lower than crude oil in the oil reservoir, further aggravation crude oil is analysed the wax problem.
Therefore, although this method large-scale application in common oil reservoir, this method can not effectively solve the wax problem of analysing of crude oil in the wax precipitation oil reservoir oil reservoir, and domestic also not have successfully it to be directly used in the precedent that wax precipitation oil reservoir is exploited at present.
Quiet 35 is example with the Liaohe Oil Field.
Open source information shows: quiet 35 of Liaohe Oil Field belongs to wax precipitation oil reservoir, average pore 20%; Its eastern oil paraffin content 24%, 37 ℃ at freezing point, 39.87 ℃ of the reservoir temperatures of driving a well, closing well 43.27 ℃ of observed temperatures after 34 days, wax precipitation temperature is 42 ℃, 55 ℃ of dewaxing temperature; On average about 54 ℃ of its Western crude paraffin contents 33%, original temperature, 50 ℃ at freezing point, wax precipitation temperature is 54 ℃, 60 ℃ of dewaxing temperature.
Theoretical calculating shows: according to 5 tons/hour of flows, and with common water flooding regime water filling, about 97 ℃ of the temperature of the hot water arrival well head that ground is 100 ℃, about 80 ℃ of the temperature in arrival shaft bottom;
If 80 ℃ of hot water enter the east oil reservoir, the highest 4 ℃ of the reservoir temperatures that improve, reservoir temperature is increased to 44.87 ℃ by 39.87 ℃, still be lower than 10.13 ℃ of its dewaxing temperature, therefore this hot water can not be increased to reservoir temperature the dewaxing temperature, even do not consider dewaxing heat absorption problem, these 80 ℃ of hot water can not effectively melt the wax crystalline substance in the oil reservoir, more can not effectively suppress the wax crystalline substance and continue to grow up, stop up the oil reservoir hole;
If 80 ℃ of hot water enter western oil reservoir, the highest 2 ℃ of the reservoir temperatures that improve, reservoir temperature is increased to 56 ℃ by 54 ℃, still be lower than 4 ℃ of its dewaxing temperature, therefore this hot water can not be increased to reservoir temperature the dewaxing temperature, even do not consider dewaxing heat absorption problem, these 80 ℃ of hot water can not effectively melt the wax crystalline substance in the oil reservoir, more can not effectively suppress the wax crystalline substance and continue to grow up, stop up the oil reservoir hole.
The pilot production of this block proves: adopt the water flood of 90 ℃ of surface well saliva temperature can not effectively solve the analyse wax problem of this block crude oil in oil reservoir, can not apply this method at this block.
In a word, the resultant effect of said method when the exploitation wax precipitation oil reservoir is not ideal.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of exploitation method for wax precipitation oil reservoir, this exploitation method can effectively solve the analyse wax problem of crude oil in oil reservoir, can effectively exploit wax precipitation oil reservoir, significantly reduce the wax precipitation oil reservoir cost of winning, prolong the oil well production cycle, increase oil well output, improve the oil reservoir ultimate recovery, and implement easily, safe and reliable, remarkable in economical benefits.
" wax precipitation oil reservoir " principal character among the present invention is: oil reservoir inside (claiming oil reservoir again) original temperature is smaller or equal to the wax precipitation temperature of crude oil that this oil reservoir is contained; Perhaps oil reservoir inside (claiming oil reservoir again) is though original temperature is higher than the wax precipitation temperature of crude oil that this oil reservoir is contained, and its temperature can be smaller or equal to the wax precipitation temperature of crude oil that this oil reservoir is contained when seepage flow, and crude oil can be separated out the wax crystalline substance during seepage flow in this oil reservoir; Perhaps oil reservoir inside (claiming oil reservoir again) is no more than this oil reservoir and contains 10 ℃ of crude oil wax precipitation temperatures though original temperature is higher than the wax precipitation temperature of crude oil that this oil reservoir is contained; Shaft bottom when perhaps oil well drives a well and recovers the oil or/and near the shaft bottom observed temperature of oil reservoir smaller or equal to the wax precipitation temperature of crude oil that this oil reservoir is contained; Though perhaps the oil well closing well stops to recover the oil the shaft bottom, back or/and near the observed temperature of the oil reservoir in shaft bottom is higher than the wax precipitation temperature of crude oil that this oil reservoir is contained, and is no more than this oil reservoir and contains 5 ℃ of crude oil wax precipitation temperatures; Perhaps can be at oil well or/and separate out the oil reservoir of (or generation) wax crystalline substance near the water injection well in the oil reservoir.
" seepage flow " among the present invention refers to: the flow process of fluid (as crude oil, oil water mixture, gas etc.) in oil reservoir (oil reservoir), can refer to fluid flowing in oil reservoir sand grains gap (hole), also can refer to fluid flowing in oil reservoir rock seam (slit).
" freezing point " among the present invention refers to: under rated condition, the temperature that crude oil loses flowability belongs to one of physical parameter of crude oil, claims setting temperature again, is called for short condensation point.
" dewaxing temperature " among the present invention refers to: under rated condition, the temperature that the wax crystalline substance in the crude oil melts fully, disappears belongs to one of physical parameter of crude oil, claims the dewaxing point again.
" wax precipitation temperature " among the present invention refers to: under rated condition, form or produce the temperature of wax crystalline substance in the crude oil, also be commonly called as the flex point into viscosity-temperature curve sometimes, belong to one of physical parameter of crude oil, claim wax precipitation point again.
" original temperature " among the present invention refers to: oil reservoir inside (claiming oil reservoir again) exploitation, the preceding prime stratum temperature of recovering the oil belong to one of physical data of oil reservoir.
" observed temperature " among the present invention refers to: measure the oil well shaft bottom of acquisition or/and near the temperature of the oil reservoir in shaft bottom with existing method.
" hot fluid " among the present invention refers to: temperature is 30～200 ℃ hot water or water vapour or hot water, water vapor mixture; Described hot water can be clear water, also can be oilfield sewage, also can be the mixture that clear water, oilfield sewage mix arbitrarily.
" oilfield sewage " among the present invention refers to: deriving from the oil-polluted water of oil reservoir, oil reservoir, oil well, can be the oil-polluted water of handling through the sewerage treatment measure, also can be direct isolated oil-polluted water from well product; Can be the oil-polluted water of same oil reservoir, also can be the mixing oil-polluted water of different oil reservoirs.
" adverse chemical reaction " among the present invention: the chemical reaction (as the combination between the metal ions such as the association reaction between the association reaction between cationic surfactant and the anion surfactant, PAMC and the PAMA, PAMA and iron aluminium or cross-linking reaction etc.) that refers in solution, to take place the yin, yang ions binding; Also refer to produce the chemical reaction of precipitation, gas; Also refer to the violent and reaction speed of reaction, the unmanageable chemical reaction of temperature rise; Also refer to decompose the high molecular chemical reaction of organic synthesis (as chain rupture decomposition reaction between chain rupture decomposition reaction, hydrogen peroxide and the polyacrylamide between peroxide and the high molecular surfactant etc.).
The referring to of " liquid " among the present invention: the fluid that is in a liquid state, can refer to the aqueous solution, organic solution, emulsion, the suspension that are in a liquid state, also can refer to fluid or the melt liquid of molten condition.
" blowing agent " among the present invention refers to: any one of water soluble anionic surfactant, water-soluble cationic surfactant, non-ionic surface active agent, biosurfactant or between them arbitrarily two or more arbitrary proportion mix and do not have mixture or a mixing material of bad chemical reaction.
" oil well " among the present invention: claim production well or producing well again, refer to produce the well of crude oil or crude oil, natural gas; Can refer to existing oil well, also can refer to newly-built oil well, also can refer to be used for to produce " water injection well " of crude oil or crude oil, natural gas, not comprise the gas well that to produce natural gas, water, a small amount of liquid light hydrocarbon; Can refer to utilize the oil well of existing common completion mode completion, also can refer to utilize the oil well of existing thermal recovery completion mode completion; Generally refer to the oil well that sleeve pipe and oil pipe are complete, also refer to only have the oil well of sleeve pipe sometimes; Open source information and the actual production of domestic oil field show: " oil well " among the present invention can be produced needs according to concrete oil recovery and be converted to " water injection well " (oilfield enterprise is commonly called as metaideophone) among the present invention, also can be converted by " water injection well " among the present invention, and the mutual conversion between such " oil well ", " water injection well " be recover the oil produce in recurrent thing.
" water injection well " among the present invention: be called for short well again, refer in the oil reservoir (oil reservoir) water filling and/or annotate the well of other fluids; Can be identical with " oil well " structure among the present invention, also can be different, complete oil pipe and sleeve pipe can be arranged, also can have only sleeve pipe, also refer in the oil reservoir (oil reservoir) water filling sometimes and/or annotate the oil well of other fluids; Open source information and the actual production of domestic oil field show: " water injection well " can directly build up, also can produce needs by " oil well " among the present invention converted (oilfield enterprise is commonly called as metaideophone) according to recovering the oil, and such metaideophone is recurrent thing during oil recovery is produced; The actual production of domestic oil field shows: " water injection well " among the present invention also can be converted to " oil well " among the present invention according to recover the oil producing needs, and such conversion also be recover the oil produce in recurrent thing.
" tubing string " among the present invention refers to: the oil pipe outside the decannulation of oil well down-hole, sucker rod, pump, downhole tool etc.
" chemical agent " among the present invention refers to: any one of methyl naphthalene, thinner, pour-point depressant, oil displacement agent, methyl naphthalene liquid, extraordinary organic liquid, special fluid, extraordinary melt liquid or arbitrarily two or more arbitrary proportion mix and do not have a mixture of bad chemical reaction.
" chemical agent " should possess following whole essential characteristic among the present invention:
1) can reduce waxy crude oil wax precipitation point and/or freezing point and/or dewaxing point simple substance (being one matter) or the mixture more than 1 ℃, perhaps can dissolve simple substance (being one matter) or the mixture of (or dissolving) paraffin (or wax crystalline substance) at normal temperatures and pressures;
2) be liquid or be liquid condition below 200 ℃ under the normal temperature and pressure, perhaps can making liquid below 200 ℃;
3) exploit regulation, the requirement that meets the countries concerned's standard, industry standard, company standard in the application at " wax precipitation oil reservoir " of the present invention.
Open source information shows: gasoline, benzene, carbon tetrachloride, carbon disulfide can dissolve paraffin (or wax crystalline substance) at normal temperatures and pressures, but being used for " wax precipitation oil reservoir " of the present invention exploitation uses, the countries concerned's standards, industry standard, the regulation of company standard, requirement have been violated, do not possess whole essential characteristics that " chemical agent " among the present invention should possess, therefore do not belong to " chemical agent " among the present invention.
Test shows: can dissolve simple substance or the mixture of (or dissolving) paraffin (or wax crystalline substance) at normal temperatures and pressures, all can effectively reduce the waxy crude oil wax precipitation point more than 1 ℃.
Test shows: any one of 20% methyl naphthalene and thinner, pour-point depressant, oil displacement agent, methyl naphthalene liquid, extraordinary organic liquid, special fluid, extraordinary melt liquid or arbitrarily two or more arbitrary proportion mix and after the mixture that do not have a bad chemical reaction mixes, can effectively reduce the waxy crude oil wax precipitation point more than 1 ℃.
Among the present invention " methyl naphthalene "It is the mixture of any one or any two or more arbitrary proportion in 1-methyl naphthalene, 2-methyl naphthalene, the mixed methylnaphthalene.
The essential characteristic of " 1-methyl naphthalene " is among the present invention: open source information shows that " 1-methyl naphthalene " is called alpha-methyl-naphthalene, molecular formula C again among the present invention
11H
10, be in a liquid state under the normal temperature and pressure, fusing point-22 ℃, water insoluble, be dissolved in most organic solvents such as ethanol, ether; Laboratory test shows, dissolves each other with " mixed methylnaphthalene " under its normal temperature and pressure, can dissolve the 2-methyl naphthalene, does not produce chemical reaction with 2-methyl naphthalene, " mixed methylnaphthalene ", crude oil; Laboratory test shows that it can be dissolved in the crude oil; Belong to commodity, can purchase from the market;
The essential characteristic of " mixed methylnaphthalene " is among the present invention: " mixed methylnaphthalene " is called for short (being commonly called as) methyl naphthalene usually among the present invention, be the organic mixture based on 2-methyl naphthalene, 1-methyl naphthalene, its 2-methyl naphthalene, 1-methyl naphthalene content are relevant with concrete marque; Under the normal temperature and pressure be oily liquids, water insoluble, be dissolved in ethanol, ether; The domestic unification product standard of formulating at present, its product type, quality index etc. are different and different with the company standard of each manufacturing enterprise, and the 2-methyl naphthalene of general merchandise, 1-methyl naphthalene total content 〉=50%, fusing point are lower than-5 ℃; Laboratory test shows, dissolves each other with the 1-methyl naphthalene under " mixed methylnaphthalene " normal temperature and pressure, can dissolve the 2-methyl naphthalene, does not produce chemical reaction with 2-methyl naphthalene, 1-methyl naphthalene, crude oil; Laboratory test shows that " mixed methylnaphthalene " can be dissolved in the crude oil; Belong to commodity, and marque is numerous, can purchases from the market;
The essential characteristic of " 2-methyl naphthalene " is among the present invention: open source information shows that " 2-methyl naphthalene " is called beta-methylnaphthalene, molecular formula C again among the present invention
11H
10Be that white is to light yellow monoclinic crystal or molten solid, 34.6 ℃ of fusing points under the normal temperature and pressure; Water insoluble, be dissolved in most organic solvents such as ethanol, ether; Laboratory test shows, can be dissolved in 1-methyl naphthalene, " mixed methylnaphthalene " under its normal temperature and pressure, can be dissolved in the pyrogen oil that temperature surpasses its fusing point, does not produce chemical reaction with 1-methyl naphthalene, " mixed methylnaphthalene ", crude oil; Belong to commodity, can purchase from the market.
" thinner " among the present invention: refer to reduce the chemical agent of viscosity of crude, it be in the following substances any one or between them arbitrarily two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) with methyl naphthalene liquid is the oil-soluble viscosity reducer of main active ingredient, as being the oil-soluble viscosity reducer of main active ingredient with methyl naphthalene, fusel oil mixing material, can utilizes the dissolved dilution principle to reduce viscosity of crude;
" oilfield chemistry " the 173rd page of 11-12 by the 1st edition the 1st printing in publishing house of University of Petroleum July in 2000 is capable as can be known described: alcohol, alcohol ether can dissolved bitumen matter; And capable as can be known described by the 175th page of 13-14 of this " oilfield chemistry ": asphalt content is more high, and oil viscosity is just more high; By open source information as can be known: the fusel oil main component is isoamyl alcohol, butanols, propyl alcohol and enanthol; Therefore, fusel oil can dissolved bitumen matter, can reduce viscosity of crude;
Test shows: methyl naphthalene can dissolved bitumen matter, can effectively reduce domestic each elephant viscosity of crude;
2) with surfactant be the thinner of main active ingredient, as being the water-soluble thinner liquid of main active ingredient with water soluble anionic surfactant, can utilize the reducing viscosity by emulsifying principle to reduce viscosity of crude;
As described in capable as " oilfield chemistry " the 175th page of inverse 3-4 of the 1st edition the 1st printing in publishing house of University of Petroleum July in 2000: " available reducing viscosity by emulsifying method heavy crude producing.This method is that aqueous surfactant solution is annotated the down-hole, makes full-bodied viscous crude become low viscous oil-in-water emulsion extraction ";
3) with extraordinary organic liquid be the oil-soluble viscosity reducer of main active ingredient; As n-butyl ether, dimethylbenzene, butyl glycol ether, can utilize the dissolved dilution principle to reduce viscosity of crude.
Because butyl glycol ether belongs to a kind of of alcohol ether, therefore can dissolved bitumen matter, can reduce viscosity of crude.
Test shows: n-butyl ether, dimethylbenzene can dissolved bitumen matter, can effectively reduce domestic each elephant viscosity of crude.
" thinner " should possess following whole essential characteristic among the present invention:
1) can reduce waxy crude oil wax precipitation point and/or freezing point and/or dewaxing point simple substance (being one matter) or the mixture more than 1 ℃, perhaps can dissolve simple substance (being one matter) or the mixture of (or dissolving) paraffin (or wax crystalline substance) at normal temperatures and pressures;
2) be liquid or be liquid condition below 200 ℃ under the normal temperature and pressure, perhaps can making liquid below 200 ℃;
3) exploit regulation, the requirement that meets the countries concerned's standard, industry standard, company standard in the application at " wax precipitation oil reservoir " of the present invention.
Test shows: will have thinner now and add in the quiet 35 blocks of crude oil in Liaohe Oil Field, and can effectively reduce this crude oil wax precipitation point more than 1 ℃.
" pour-point depressant " among the present invention: the chemical agent that refers to reduce former oil freezing point.
" pour-point depressant " among the present invention should possess following whole essential characteristic:
1) can reduce waxy crude oil wax precipitation point and/or freezing point and/or dewaxing point simple substance (being one matter) or the mixture more than 1 ℃, perhaps can dissolve simple substance (being one matter) or the mixture of (or dissolving) paraffin (or wax crystalline substance) at normal temperatures and pressures;
2) be liquid or be liquid condition below 200 ℃ under the normal temperature and pressure, perhaps can making liquid below 200 ℃;
3) exploit regulation, the requirement that meets the countries concerned's standard, industry standard, company standard in the application at " wax precipitation oil reservoir " of the present invention.
Test shows: will have pour-point depressant now and add in the quiet 35 blocks of crude oil in Liaohe Oil Field, and can effectively reduce this crude oil wax precipitation point more than 1 ℃.
Further, pour-point depressant of the present invention be in the following substances any one or between them arbitrarily two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) with methyl naphthalene liquid is the oil-soluble pour-point depressant of main active ingredient, as being the oil-soluble pour-point depressant of main active ingredient with methyl naphthalene, fusel oil mixing material, can reduces former oil freezing point by eutectic, distortion nucleus, molten wax mechanism.
" oilfield chemistry " the 167th page of 6-7 by the 1st edition the 1st printing in publishing house of University of Petroleum July in 2000 is capable as can be known described: condensed ring aromatic hydrocarbon can to form nucleus be eutectic by participating in, thereby nucleus is twisted, be unfavorable for the wax crystalline substance continue grow up; By the 166th page of inverse of this " oilfield chemistry " the 1st row as can be known: methyl naphthalene belongs to condensed ring aromatic hydrocarbon; And capable as can be known described by the 255th page of inverse 4-5 of this " oilfield chemistry ": the nonpolar part of polymer-type pour-point depressant main chain and/or side chain can be eutectic with wax molecule cocrystallization, and its polarity part then can make wax Jingjing type produce distortion; Therefore, relatively methyl naphthalene and polymer-type pour-point depressant to the effect of wax crystalline substance as can be known the two the mechanism of action be similar; Therefore, methyl naphthalene belongs to the pour-point depressant category.
" oilfield chemistry " the 174th page of 3-5 by the 1st edition the 1st printing July in 2000 of publishing house of University of Petroleum is capable as can be known described: alcohol, alcohol ether can increase the solubility of wax and water; As can be known described by the 252nd page of inverse of this " oilfield chemistry " the 2nd row: the paraffin content of crude oil is more high, and the freezing point of crude oil is also more high; Therefore, fusel oil can utilize molten wax mechanism to reduce former oil freezing point.
Laboratory test shows: 98% methyl naphthalene, 5% fusel oil mixing material can dissolve paraffin grade wax and candle, add this mixing material 10% and can effectively reduce its freezing point more than 1 ℃ in quiet 35 blocks of crude oil.
2) with surfactant be pour-point depressant or its liquid of main active ingredient, as being the water-soluble pour-point depressant liquid of main active ingredient with sodium alkyl sulfonate, sodium alkyl benzene sulfonate, can utilizing in wax brilliant surface absorption, make wax should not form the former oil freezing point of cancellated mechanism reason reduction.
" oilfield chemistry " the 255th page of inverse 6-8 by the 1st edition the 1st printing in publishing house of University of Petroleum July in 2000 is capable as can be known described: " surfactant type pour point depressant for crude oil such as petroleum sulfonate and polyxyethylated ammonium; they are by the mechanism in wax brilliant surface absorption, make wax form the network structure that should not spread all over whole system and play the pour point depression effect "; " chemistry recovers the oil " 31-33 page or leaf by the 4th the 1st edition, in August, 2006 of May in 1989 printing of publishing house of China University Of Petroleum Beijing is as can be known described: sodium alkyl sulfonate, sodium alkyl benzene sulfonate all belong to the petroleum sodium sulfonate category; Therefore, sodium alkyl sulfonate, sodium alkyl benzene sulfonate belong to the pour-point depressant category.
3) with extraordinary organic liquid be oil-soluble pour-point depressant or its liquid of main active ingredient; As n-butyl ether, dimethylbenzene, butyl glycol ether or its mixing material, can utilize molten wax principle to reduce former oil freezing point.
" oilfield chemistry " the 173rd page of eighth row by the 1st edition the 1st printing July in 2000 of publishing house of University of Petroleum is as can be known described: dimethylbenzene is the very big solvent of molten wax amount; By open source information as can be known: n-butyl ether can be used as extraction and the refining solvent of wax; The 174th page of 3-5 is capable as can be known described by this " oilfield chemistry ": alcohol, alcohol ether can increase the solubility of wax and water, and butyl glycol ether belongs to a kind of of alcohol ether; As can be known described by the 252nd page of inverse of this " oilfield chemistry " the 2nd row: the paraffin content of crude oil is more high, and the freezing point of crude oil is also more high; Therefore, n-butyl ether, dimethylbenzene, butyl glycol ether can utilize molten wax principle to reduce former oil freezing point.
Test shows: n-butyl ether, dimethylbenzene, butyl glycol ether any one or its mixing material all can dissolve paraffin grade wax and candle, add 10% and all can effectively reduce its freezing point more than 1 ℃ in quiet 35 blocks of crude oil.
" oil displacement agent " among the present invention: refer to the chemical agent that can improve oil recovery factor, the crude oil in the oil reservoir is driven to oil well.
" oil displacement agent " among the present invention should possess following whole essential characteristic:
1) can reduce waxy crude oil wax precipitation point and/or freezing point and/or dewaxing point simple substance (being one matter) or the mixture more than 1 ℃, perhaps can dissolve simple substance (being one matter) or the mixture of (or dissolving) paraffin (or wax crystalline substance) at normal temperatures and pressures;
2) be liquid or be liquid condition below 200 ℃ under the normal temperature and pressure, perhaps can making liquid below 200 ℃;
3) exploit regulation, the requirement that meets the countries concerned's standard, industry standard, company standard in the application at " wax precipitation oil reservoir " of the present invention.
Further, described oil displacement agent be in the following substances any one or between them arbitrarily two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) with sulfonate surfactant is the oil displacement agent of main active ingredient, as being the oil displacement agent liquid of main active ingredient with sodium alkyl sulfonate, sodium alkyl benzene sulfonate, petroleum sodium sulfonate, alkyl toluene sodium sulfonate.
2) with the carboxylate surfactant be the oil displacement agent of main active ingredient, as being the oil displacement agent liquid of main active ingredient with soap, petroleum carboxylate.
3) with polyether surfactant be the oil displacement agent of main active ingredient, as being the oil displacement agent of main active ingredient with peregal type surfactant, OP type surfactant, tween (Tween) type surfactant.
4) be the oil displacement agent of main active ingredient with nonionic-anionic amphoteric surfactant, as being the oil displacement agent liquid of main active ingredient with polyoxyethylene polyoxypropylene alkyl alcohol ether sulphonate, polyoxyethylene polyoxypropylene alkyl alcohol ether carboxylate, polyoxyethylene polyoxypropylene alkyl alcohol ether sulfuric acid, polyoxyethylene polyoxypropylene alkyl alcohol ether phosphate ester salt.
5) with cationic surface active agent be the oil displacement agent of main active ingredient, as being the oil displacement agent liquid of main active ingredient with chlorination dodecylbenzyl Dimethyl Ammonium, chlorination dodecyl trimethyl ammonium, chlorination dodecyl ammonium.
6) be the oil displacement agent of main active ingredient with nonionic-cationic amphoteric surfactant, as being the oil displacement agent liquid of main active ingredient with alkyl-dimethyl ammonium acetic acid inner salt, alkyl ammonium group propionic acid inner salt.
" oilfield chemistry " 109-110 page or leaf by the 1st edition the 1st printing in the 2O00 of publishing house of University of Petroleum July is as can be known described: sulfonate surfactant, carboxylate surfactant, polyether surfactant, nonionic-anionic amphoteric surfactant belong to the oil displacement agent category; Though cationic surface active agent, nonionic-cationic amphoteric surfactant exist in the defective of stratum absorption loss, but still belong to the oil displacement agent category.
Test shows: will have oil displacement agent now and add in the quiet 35 blocks of crude oil in Liaohe Oil Field, and can effectively reduce this crude oil wax precipitation point more than 1 ℃.
" methyl naphthalene liquid " among the present invention: the liquid that refers to contain methyl naphthalene.
" methyl naphthalene liquid " should possess following whole essential characteristic among the present invention:
1) can reduce waxy crude oil wax precipitation point and/or freezing point and/or dewaxing point simple substance or the mixture more than 1 ℃, perhaps can dissolve simple substance or the mixture of (or dissolving) paraffin (or wax crystalline substance) at normal temperatures and pressures;
2) be liquid or be liquid condition below 100 ℃ under the normal temperature and pressure, perhaps can making liquid below 100 ℃;
3) exploit regulation, the requirement that meets the countries concerned's standard, industry standard, company standard in the application at " wax precipitation oil reservoir " of the present invention.
Further, described methyl naphthalene liquid be in the following liquid any one or between them arbitrarily two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) methyl naphthalene, fusel oil mixing material;
2) methyl naphthalene, organic solvent mixing material;
3) methyl naphthalene emulsion, suspension;
4) the methyl naphthalene liquid that is in a liquid state below 50 ℃;
5) methyl naphthalene that is in a liquid state below 100 ℃ and condensed ring aromatic hydrocarbon mixing material;
6) methyl naphthalene that is in a liquid state below 100 ℃ and condensed ring aromatic hydrocarbon derivative mixing material;
7) methyl naphthalene that is in a liquid state below 100 ℃ and biphenyl mixing material;
8) methyl naphthalene that is in a liquid state below 50 ℃ and crude oil mixed liquor body;
9) methyl naphthalene and liquid petroleum resin mixing material;
10) methyl naphthalene that is in a liquid state below 100 ℃ and Petropols mixing material;
11) methyl naphthalene and organic liquid mixing material;
Open source information shows: the marketable coal tar on the domestic market contains methyl naphthalene, organic solvent, belongs to the liquid that contains methyl naphthalene, can reduce waxy crude oil wax precipitation point and/or freezing point and/or dewaxing point more than 1 ℃, has the function of methyl naphthalene liquid; If use but coal tar is used for " wax precipitation oil reservoir " of the present invention exploitation, the countries concerned's standards, industry standard, the regulation of company standard, requirement have been violated, do not possess whole essential characteristics that " methyl naphthalene liquid " among the present invention should possess, therefore do not belong to " methyl naphthalene liquid " among the present invention.
Test shows: the mixing material of 95% methyl naphthalene and 5% fusel oil can effectively reduce the quiet 35 crude oil wax precipitation points in Liaohe Oil Field more than 1 ℃.
Test shows: under the normal temperature, mixed methylnaphthalene can be miscible with arbitrary proportion with fusel oil or organic solvent or liquid petroleum resin or crude oil; 90% mixed methylnaphthalene can dissolve 10% naphthalene or dimethylnaphthalene or biphenyl or Petropols; Mixed methyl naphthalene can with pyridine,, heterocycle organic liquid arbitrary proportion such as quinoline, furans is miscible.
" fusel oil " essential characteristic among the present invention is: produce any one or arbitrary proportion is mixed between them mixture in the accessory substance fusel oil of butadiene from the byproduct fusel oil of fermentation method preparing alcohol, alcohol method, be in a liquid state under the normal temperature and pressure; Test shows that itself and 1-methyl naphthalene, mixed methylnaphthalene dissolve each other, and is dissolved in crude oil, can dissolve the 2-methyl naphthalene; Do not produce chemical reaction with 1-methyl naphthalene, 2-methyl naphthalene, mixed methylnaphthalene, crude oil under the normal temperature and pressure; Belong to commodity, can purchase from the market.
" extraordinary organic liquid " among the present invention: refer to the organic matter that is in a liquid state under the normal temperature.
" extraordinary organic liquid " should possess following whole essential characteristic among the present invention:
1) can reduce waxy crude oil wax precipitation point and/or freezing point and/or dewaxing point simple substance or the mixture more than 1 ℃, perhaps can dissolve simple substance or the mixture of (or dissolving) paraffin (or wax crystalline substance) at normal temperatures and pressures;
2) be liquid or be liquid condition below 100 ℃ under the normal temperature and pressure, perhaps can making liquid below 100 ℃;
3) exploit regulation, the requirement that meets the countries concerned's standard, industry standard, company standard in the application at " wax precipitation oil reservoir " of the present invention.
Open source information shows: gasoline, benzene, carbon tetrachloride, carbon disulfide all belong to the organic matter that is in a liquid state under the normal temperature, can dissolve paraffin (or wax crystalline substance) at normal temperatures and pressures, have the function of extraordinary organic liquid; If but use it in " wax precipitation oil reservoir " of the present invention exploitation application, the countries concerned's standards, industry standard, the regulation of company standard, requirement have been violated, do not possess whole essential characteristics that " extraordinary organic liquid " among the present invention should possess, therefore do not belong to " extraordinary organic liquid " among the present invention.
Further, extraordinary organic liquid be following liquid any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) pure class I liquid I is as liquid such as methyl alcohol, isobutanol, octanols;
2) diol, derivatives liquid is as liquid such as butyl glycol ether, diethylene glycol butyl ether, diethylene glycol ethers;
3) ethers liquid is as liquid such as n-butyl ether, isobutyl ether, octyl ethers;
4) ester class I liquid I is as liquid such as hexyl acetate, phenylacetate, methyl benzoates;
5) ketone liquid is as liquid such as 3-heptanone, methyln-hexyl ketone, cyclopentanone;
6) aromatic hydrocarbons liquid is as liquid such as dimethylbenzene, trimethylbenzene, ethylbenzene;
7) heavy aromatics liquid is as mixing liquid such as heavy benzene, carbon nine, carbon ten;
8) aromatic hydrocarbons or arene derivatives content are greater than 5% liquid petroleum product liquid, as diesel oil, plastic cracking oil, rubber cracking wet goods liquid;
9) olefin liquid is as liquid such as 14-alkene, 12-alkene, cyclopentadiene, dicyclopentadiene, fragrant alkene, styrene, methyl styrene, p-methylstyrenes;
10) solvent naphtha liquid is as alkane solvent oil, aromatic solvent naphtha, alkene solvent wet goods liquid;
11) Petropols byproduct liquid is as residue at the bottom of the still of Petropols production technology formation;
12) under the normal temperature be liquid Petropols liquid;
13) fusel iol liquid;
14) the hydro carbons autopolymer liquid that is in a liquid state below 100 ℃;
15) the methyl naphthalene melt liquid that is in a liquid state below 50 ℃;
16) paraffin content is lower than 10% crude oil;
17) organic liquid of not chloride element, element sulphur in the molecular formula is as heterocycle organic liquids such as pyridine, quinoline, furans;
18) the Petropols liquid that is in a liquid state below 100 ℃;
19) bio-oil that is in a liquid state below 100 ℃, cracking bio-oil liquid are as soya-bean oil, cracking animal oil, biodiesel etc.;
Open source information shows: alcohol, diol, derivatives can increase the mutual solubility of wax and water, therefore can dissolve paraffin (or wax crystalline substance).
The 170th page inverse 1-2 is capable once stated for " oilfield chemistry " of the 1st edition the 1st printing in publishing house of University of Petroleum July in 2007: " colloid in the crude oil, asphalitine itself are exactly wax-proofing agent ".
Test shows: the diethylene glycol butyl ether is added in the quiet 35 blocks of crude oil in Liaohe Oil Field, can reduce this crude oil wax precipitation point more than 1 ℃.
Test shows: the crude oil of paraffin content 5% is added in the quiet 35 blocks of crude oil in Liaohe Oil Field, can reduce this crude oil wax precipitation point more than 1 ℃.
" special fluid " among the present invention: refer to following liquid any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) surfactant liquids that is in a liquid state below 1O0 ℃;
2) the oily molten or water-soluble polymer liquid that is in a liquid state below 100 ℃;
3) the condensed ring aromatic hydrocarbon liquid that is in a liquid state below 100 ℃;
4) the condensed ring aromatic hydrocarbon derivative liquid that is in a liquid state below 100 ℃;
5) the commodity wax-proofing agent that is in a liquid state under the normal temperature;
6) the commodity oil base paraffin remover that is in a liquid state under the normal temperature;
7) the water base paraffin remover of the commodity that are in a liquid state under the normal temperature;
8) the Petropols liquid that is in a liquid state below 100 ℃;
" special fluid " should possess following whole essential characteristic among the present invention:
1) can reduce waxy crude oil wax precipitation point and/or freezing point and/or dewaxing point simple substance or the mixture more than 1 ℃, perhaps can under the normal pressure normal pressure, dissolve simple substance or the mixture of (or dissolving) paraffin (or wax crystalline substance);
2) be liquid or be liquid condition below 100 ℃ under the normal temperature and pressure, perhaps can making liquid below 100 ℃;
3) exploit regulation, the requirement that meets the countries concerned's standard, industry standard, company standard in the application at " wax precipitation oil reservoir " of the present invention.
Open source information shows: the sodium cetanesulfonate outward appearance is slurry, can be soluble in water under the normal temperature, belong to surfactant type pour point depressant for crude oil category; Polyacrylate is a kind of of oil-soluble polymers, and is dissolved in solvent, belongs to polymer type crude oil pour-point depressant category; Condensed ring aromatic hydrocarbon, condensed ring aromatic hydrocarbon derivative can be dissolved in solvent, belong to the wax-proofing agent category.
Test shows: sodium cetanesulfonate liquid is added in 35 blocks of crude oil in meditation, can reduce this crude oil wax precipitation point more than 1 ℃.
Test shows: polyacrylate liquid is added in 35 blocks of crude oil in meditation, can reduce this crude oil wax precipitation point more than 1 ℃.
Test shows: commodity wax-proofing agent or water base paraffin remover or oil base paraffin remover are added in 35 blocks of crude oil in meditation, all can reduce this crude oil wax precipitation point more than 1 ℃.
Laboratory test shows: 5% naphthalene is dissolved in the mixing material of 95% fusel oil or the mixing material that 5% dimethylnaphthalene is dissolved in 95% fusel oil is added in the quiet 35 blocks of crude oil in Liaohe Oil Field, all can reduce this crude oil wax precipitation point more than 1 ℃.
" extraordinary melt liquid " among the present invention: refer to contain condensed ring aromatic hydrocarbon, condensed ring aromatic hydrocarbon derivative below 200 ℃, oil is molten or water-soluble polymer, Petropols, surfactant any one or above melt liquid.
The essential characteristic of " extraordinary melt liquid " is among the present invention: fusing point is lower than 200 ℃.
Further, described extraordinary melt liquid comprise following any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) the condensed ring aromatic hydrocarbon melt liquid that is in a liquid state below 200 ℃;
2) the condensed ring aromatic hydrocarbon derivative melt liquid that is in a liquid state below 200 ℃;
3) the oily molten or water-soluble polymer melt liquid that is in a liquid state below 200 ℃;
4) the surfactant melt liquid that is in a liquid state below 200 ℃;
5) the Petropols melt liquid that is in a liquid state below 200 ℃;
6) the hydro carbons autopolymer melt liquid that is in a liquid state below 200 ℃.
" surfactant " among the present invention: refer to that those a small amount of existence just can reduce capillary material greatly.
The essential characteristic of " surfactant " is among the present invention: have surface-active, can reduce surface tension (or interfacial tension).
Further, described surfactant be in the following substances any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) water soluble anionic surfactant, as: sodium alkyl sulfonate, sodium alkyl benzene sulfonate, alkyltrimethyl ammonium chloride, polyethenoxy alkylphenols carboxylic acid sodium salt, polyoxyethylated alkyl alcohol carboxylic acid sodium salt, polyethenoxy alkylphenols sulfonate sodium, polyoxyethylated alkyl alcohol sulfonate sodium, polyoxyethylated alkyl alcohol sulfuric ester sodium salt, polyethenoxy alkylphenols sulfuric ester sodium salt, structural formula are C
nF
2n+1The carboxylic acid sodium type fluorine surfactant of COONa, wherein n represents that 4～10 integer, structural formula are C
8F
17CONH (CH
2)
5The carboxylic acid sodium type fluorine surfactant of COONa, structural formula are R
fOC
6H
4The carboxylic acid sodium type fluorine surfactant of COONa, structural formula are C
nF
2n+1SO
3Na sodium sulfonate type fluorine surfactant, wherein n represents 5 or 7 or 9, structural formula is C
3F
7(CH
2)
nSO
3The sodium sulfonate type fluorine surfactant of Na, wherein n represents 5 or 7 or 9, structural formula is C
nF
2n+1C
6H
4SO
3The sodium sulfonate type fluorine surfactant of H, wherein n represents 5 or 7 or 9, structural formula is C
7F
15CH
2OSO
3The sulfuric acid type fluorine surfactant of Na, structural formula are (CF
3)
2CF
2(CH
2)
6OSO
3The sulfuric acid type fluorine surfactant of Na or structural formula are C
8F
17SO
2NH (CH
2)
3NH (CH
2)
3NHCH
2CH
2OSO
3The sulfuric acid type fluorine surfactant of Na;
2) water-soluble cationic surfactant, as: chlorination dodecylbenzyl Dimethyl Ammonium, chlorination dodecyl trimethyl ammonium, chlorination dodecyl ammonium;
3) water soluble nonionic surfactant, as: polyoxyethylated alkyl alcohol, polyethenoxy alkylphenols, polyoxyethylene octyl phenol ether-10, polyoxyethylene octyl phenol ether-7, polyoxyethylene polyoxypropylene propylene glycol, sorbitan monocarboxylate APEO, Span-20;
4) oil-soluble anion surfactant, as: oil-soluble petroleum sodium sulfonate, oil-soluble oil carboxylic acid sodium, oil-soluble mahogany acid potassium or mahogany acid ammonium;
5) oil-soluble non-ionic surface active agent, as: F (CF
2)
m(CH
2)
nH, wherein m=10 or 12, n=8 or 12 or 14 or 18 or 24, polyoxyethylene octadecylamine-7, lauroyl ethylene glycol amine, fish oil acyl ethylene glycol amine, polyoxyethylene alkylamide, C
10F
19O (CH
2CH
2O)
23C
100F
19Or C
3FO (CF-CFO)
nA
r, wherein n represents 1 or 2, A
rThe expression aryl;
6) biosurfactant and solution thereof, as: with the biologic product with surface-active effect of bioengineering or biological method production, nutrient solution, the aqueous solution, emulsion, suspension, dry manufactured goods etc.;
7) amphoteric surfactant, as: polyoxyethylated alkyl alcohol sulfuric ester sodium salt, polyoxyethylated alkyl alcohol sulfuric ester ammonium salt, the polyoxyethylated alkyl alcohol organic phosphate disodium salt, two (polyoxyethylated alkyl alcohol) phosphate kalium salt, the polyoxyethylated alkyl alcohol carboxylic acid sodium salt, the polyoxyethylated alkyl alcohol sulfonate sodium, polyethenoxy alkylphenols sulfuric ester sodium salt, the polyethenoxy alkylphenols organic phosphate disodium salt, the polyethenoxy alkylphenols carboxylic acid sodium salt, the polyethenoxy alkylphenols sulfonate sodium, Aminodithioformate, alkyl-dimethyl glycine inner salt, alkyl amine group propionic acid inner salt, the A of thunder rice group;
2020,2040,2060,2070, AE, AES, AEP, AEC, AESO, APES, APEP, APEC, APESO, SP, BP, GP 8) high molecular surfactant is as code name or code name:.
" oil molten or water-soluble polymer " among the present invention: refer to main chain and/or side chain have can with the nonpolar part of wax molecule cocrystallization (eutectic), the polymer of the polarity part that makes the distortion of wax Jingjing type is also arranged.
" the molten or water-soluble polymer of oil " essential characteristic among the present invention is: can reduce waxy crude oil wax precipitation point and/or freezing point and/or dewaxing point more than 1 ℃.
Further, molten or the water-soluble polymer of described oil is alkylphenol formaldehyde resin, polyacrylate, the polycarboxylic acids vinyl acetate, ethene and vinyl carboxylate copolymer, ethene and carboxylic acid propylene ester copolymer, ethene and acrylate copolymer, ethene and methacrylate copolymer, ethene and maleic acid ester copolymer, styrene and maleic acid ester copolymer, alpha-olefin and maleic acid ester copolymer, vinyl acetate and acrylate copolymer, vinyl acetate and maleic acid ester copolymer, ethene, vinyl alcohol and vinyl carboxylate copolymer, ethene, acrylic acid and acrylate copolymer, ethene, vinyl methyl ether and maleic acid ester copolymer, ethene, vinyl acetate and maleic acid ester copolymer, ethene, vinyl carboxylates and propene sulfonic acid salt copolymer, ethene, acrylate and propene sulfonic acid salt copolymer or acrylate, in vinylpyridine and the butanediol double methacrylate copolymer any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction;
" condensed ring aromatic hydrocarbon liquid " among the present invention: the liquid that refers to contain condensed ring aromatic hydrocarbon.
Further, described condensed ring aromatic hydrocarbon liquid be in the following substances any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) condensed ring aromatic hydrocarbon, fusel oil mixing material and emulsion thereof, suspension;
2) condensed ring aromatic hydrocarbon, organic solvent mixing material and emulsion thereof, suspension;
3) condensed ring aromatic hydrocarbon emulsion, suspension;
4) the condensed ring aromatic hydrocarbon liquid that is in a liquid state below 100 ℃ and emulsion thereof, suspension;
5) the condensed ring aromatic hydrocarbon that is in a liquid state below 100 ℃, biphenyl mixing material and emulsion thereof, suspension;
6) the condensed ring aromatic hydrocarbon that is in a liquid state below 100 ℃, crude oil mixed liquor body and emulsion thereof, suspension;
7) condensed ring aromatic hydrocarbon, liquid petroleum resin mixing material and emulsion thereof, suspension;
10) the condensed ring aromatic hydrocarbon that is in a liquid state below 100 ℃, Petropols mixing material and emulsion thereof, suspension;
11) extremely emulsion, suspension of condensed ring aromatic hydrocarbon, organic liquid mixing material.
" condensed ring aromatic hydrocarbon derivative liquid " among the present invention: the liquid that refers to contain the condensed ring aromatic hydrocarbon derivative.
Further, described condensed ring aromatic hydrocarbon derivative liquid be in the following substances any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) the condensed ring aromatic hydrocarbon derivative is dissolved in the mixing material of fusel oil;
2) the condensed ring aromatic hydrocarbon derivative is dissolved in the mixing material of organic solvent;
3) condensed ring aromatic hydrocarbon derivative emulsion, suspension;
4) the condensed ring aromatic hydrocarbon derivative liquid that is in a liquid state below 100 ℃;
5) the condensed ring aromatic hydrocarbon derivative that is in a liquid state below 100 ℃, biphenyl mixing material;
6) the condensed ring aromatic hydrocarbon derivative that is in a liquid state below 100 ℃, crude oil mixed liquor body;
7) the condensed ring aromatic hydrocarbon derivative is dissolved in the mixing material of liquid petroleum resin;
10) the condensed ring aromatic hydrocarbon derivative that is in a liquid state below 100 ℃, Petropols mixing material;
11) the condensed ring aromatic hydrocarbon derivative is dissolved in the mixing material of organic liquid.
" condensed ring aromatic hydrocarbon liquid, condensed ring aromatic hydrocarbon derivative liquid " among the present invention should possess following whole essential characteristic:
1) can reduce waxy crude oil wax precipitation point and/or freezing point and/or dewaxing point simple substance (being one matter) or the mixture more than 1 ℃, perhaps can dissolve simple substance (being one matter) or the mixture of (or dissolving) paraffin (or wax crystalline substance) at normal temperatures and pressures;
2) be liquid or be liquid condition below 100 ℃ under the normal temperature and pressure, perhaps can making liquid below 100 ℃;
3) exploit regulation, the requirement that meets the countries concerned's standard, industry standard, company standard in the application at " wax precipitation oil reservoir " of the present invention.
Open source information shows: the marketable coal tar on the domestic market contains methyl naphthalene, condensed ring aromatic hydrocarbon derivative, organic solvent, belong to the liquid that contains condensed ring aromatic hydrocarbon, condensed ring aromatic hydrocarbon derivative, can reduce waxy crude oil wax precipitation point and/or freezing point and/or dewaxing point more than 1 ℃, have the function of condensed ring aromatic hydrocarbon liquid, condensed ring aromatic hydrocarbon derivative liquid; If use but coal tar is used for " wax precipitation oil reservoir " of the present invention exploitation, the countries concerned's standards, industry standard, the regulation of company standard, requirement have been violated, do not possess whole essential characteristics that " condensed ring aromatic hydrocarbon liquid, condensed ring aromatic hydrocarbon derivative liquid " among the present invention should possess, therefore do not belong to " condensed ring aromatic hydrocarbon liquid, condensed ring aromatic hydrocarbon derivative liquid " among the present invention.
Laboratory test shows: condensed ring aromatic hydrocarbon, condensed ring aromatic hydrocarbon derivative can be dissolved in fusel oil, organic solvent, organic liquid, liquid petroleum resin, the crude oil; The condensed ring aromatic hydrocarbon liquid that 10% condensed ring aromatic hydrocarbon is dissolved in the formation of 90% liquid petroleum resin adds in the quiet 35 blocks of crude oil in Liaohe Oil Field, can effectively reduce this crude oil wax precipitation point more than 1 ℃; The condensed ring aromatic hydrocarbon derivative liquid that 10% condensed ring aromatic hydrocarbon derivative is dissolved in the formation of 90% liquid petroleum resin adds in the quiet 35 blocks of crude oil in Liaohe Oil Field, can effectively reduce this crude oil wax precipitation point more than 1 ℃.
" condensed ring aromatic hydrocarbon " among the present invention refers to: any one in naphthalene, anthracene, phenanthrene, acenaphthene, aphthacene, pyrene, the benzo acenaphthene or any mixture of two or more arbitrary proportion between them.
" condensed ring aromatic hydrocarbon derivative " among the present invention refers to: any one in dimethylnaphthalene, naphthols, naphthalenediol, methylphenanthrene, the phenanthrol or between them arbitrarily two or more arbitrary proportion mixture.
Open source information shows: condensed ring aromatic hydrocarbon, condensed ring aromatic hydrocarbon derivative can be dissolved in crude oil, solvent, can participate in and form wax Jingjing nuclear, suppress the brilliant growth process of wax, have the wax control effect, belong to the wax-proofing agent category.
" hydro carbons autopolymer " among the present invention refers to: the polymer that unsaturated hydrocarbons forms by the nature auto polymerization under nature, belong to accessory substance or the discarded object of petroleum chemical industry, as from the bottom of the cyclopentadiene head tank jar from the dicyclopentadiene solid content.
" liquid petroleum resin " among the present invention refers to: the Petropols that are in a liquid state under the normal temperature.
" expansion-resisting agent " among the present invention refers to: any one or two or more arbitrary proportion of amine salt type cationic surfactant, quaternary ammonium salt cationic surfactant, pyridine salt type cationic surfactant, sylvite, ammonium salt, water-soluble aluminum salt, water-soluble zirconates, ammoniacal liquor, aluminium polychloride clear water solution, commodity expansion-resisting agent mixes and does not have a mixture of bad chemical reaction; The essential characteristic of described cationic surface active agent is: can dissociate in water, the part that active function is played in the back of dissociating is cation.
" special gas " among the present invention refers to: any one of natural gas, carbon dioxide, nitrogen, refinery gas, flue gas or the mixture of two or more arbitrary proportion arbitrarily;
For solving the problems of the technologies described above, a kind of exploitation method for wax precipitation oil reservoir of the present invention may further comprise the steps:
Add chemical agent and hot fluid in the oil reservoir, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Described chemical agent and hot-fluid physical efficiency joint synergy, effectively the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir or in effective fusing (or dissolving) oil reservoir the wax crystalline substance, reduce and improve formation pressure in the oil reservoir in the crude oil wax precipitation temperature, in order to make the smooth seepage flow of crude oil in the oil reservoir to oil well.For reaching aforementioned target, can determine described chemical agent and hot fluid minimum addition, maximum adding quantity separately as those of ordinary skills by existing method;
Described chemical agent should be able to guarantee that its application that adds in the oil reservoir meets the countries concerned's standard or industry standard or company standard regulation and requirement.For reaching aforementioned target, as those of ordinary skills by existing method can be preferably, determine the concrete component of described chemical agent or concrete commodity;
Described chemical agent and hot-fluid physical efficiency contact in oil reservoir and joint synergy, and the effective wax crystalline substance in fusing (or dissolving) oil reservoir reduces the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well.For reaching aforementioned target, can determine in oil reservoir, to add concrete technical schemes such as the concrete grammar of chemical agent and hot fluid, adding order as those of ordinary skills by having method now, can determine whether described chemical agent and hot fluid need to mix before adding oil reservoir and whether need be on ground or/and mix in the oil well, and can determine concrete technical schemes such as hybrid mode that described chemical agent and hot fluid adopt when mixing, mixed proportion.
Open source information shows: at present domestic have a lot of maturation methods, equipment can allow crude oil rise to ground from oil well, as can crude oil being promoted to ground from oil well with oil pumper, also can crude oil be pumped to ground from oil well with electric submersible pump or screw pump.
By hydrodynamics as can be known: owing to there is very high pressure in the oil reservoir, fluid is added oil reservoir after, can increase the pressure of oil reservoir; If the crude oil in the oil reservoir can flow (seepage flow), and the pressure in the oil well is lower than formation pressure, the crude oil in the oil reservoir just can seepage flow oil-feed well in.
Further, in order to exploit wax precipitation oil reservoir normally, effectively, can periodically in oil reservoir, add chemical agent and hot fluid, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Described chemical agent and hot fluid can also can add respectively in the oil reservoir on ground or/and mix in the back adding oil reservoir down-hole;
Described down-hole refers to: oil well below ground part also can refer to water injection well below ground part.
Further, for chemical agent and hot fluid are added in the oil reservoir, by oil well with existing method (as pumping) with chemical agent and hot fluid respectively or/and mix the back and add in the oil reservoir, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground with existing method again;
For fixed tubular column chemical agent and hot fluid are added in the oil reservoir, can be by oil well casing with existing method (as pumping) with chemical agent and hot fluid respectively or/and mix the back and add in the oil reservoir;
In order to reduce the hot fluid energy consumption, or in order in structure of oil well supporting capacity scope, to improve the hot fluid temperature as far as possible, or enter heat waste and the temperature drop in oil well before the oil reservoir in order to reduce hot fluid, also can be by oil well oil conduit with existing method (as pumping) with chemical agent and hot fluid respectively or/and mix the back and add in the oil reservoir;
Described mixing can refer to chemical agent and hot fluid in the mixing on ground, also can refer to mixing in oil well of chemical agent and hot fluid (alternately entering mixing naturally behind pipeline, the oil well as chemical agent and hot fluid);
Described mixing should be able to guarantee that chemical agent and hot fluid effectively contacts and joint synergy in oil reservoir, the effective wax crystalline substance in fusing (or dissolving) oil reservoir, and the wax precipitation temperature of crude oil in the reduction oil reservoir makes the smooth seepage flow of crude oil in the oil reservoir to oil well.For reaching aforementioned target, as those of ordinary skills can determine by existing method whether described chemical agent and hot fluid need to mix before adding oil reservoir and whether need be on ground or/and mix in the oil well, and can determine concrete technical schemes such as hybrid mode that described chemical agent and hot fluid adopt when mixing, mixed proportion.
Further, enter the heat waste in oil well before the oil reservoir in order to reduce hot fluid and/or chemical agent, the temperature that assurance hot fluid, chemical agent enter oil reservoir is higher, earlier in oil well casing, add special gas, in oil reservoir, add chemical agent and hot fluid by oil well oil conduit then, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Described special gas should be able to guarantee effectively to reduce hot fluid, the chemical agent heat waste in oil well.For reaching aforementioned target, can determine minimum addition, the maximum adding quantity of described special gas by existing method as those of ordinary skills.
Further, in order to exploit wax precipitation oil reservoir normally, effectively, also can pass through oil well, periodically in oil reservoir, add chemical agent and hot fluid, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground with existing method again;
Described chemical agent and hot fluid can be on ground or/and mix the back in the oil well and add in the oil reservoir, also can add respectively in the oil reservoir;
Described periodicity can refer to the mode of fixed cycle, also can refer to the mode that the cycle is indefinite.
Open source information shows: though the oil reservoir bulky of oil well control, but because the pressure in the oil reservoir is very high, as the oil reservoir reset pressure of 1000 meters of buried depths about 10MPa, therefore the chemical agent and the hot fluid that once inject flood tide in the oil reservoir can make formation pressure very high, can significantly increase construction cost or cause complex process equipmentization, as once injecting 10000 tons of chemical agents in the pressure 10MPa oil reservoir and hot fluid might make formation pressure surpass 50MPa, thereby surpass operating pressure that well mouth of oil well can carry or the fracture pressure of oil reservoir; Therefore, should be in batches or periodically in oil reservoir, add chemical agent and hot fluid, after in oil reservoir, adding a certain amount of chemical agent and hot fluid, allow again and add in chemical agent, hot fluid and crude oil " seepage flow returns " the oil-feed well in the oil reservoir and from oil well, be raised to ground, the pressure of oil reservoir is minimized, and then in oil reservoir, add chemical agent and hot fluid, form " huff and puff oil recovery technology " that oilfield applications is commonly called as, could effectively exploit wax precipitation oil reservoir.
Further, in order to prevent once in oil reservoir, adding chemical agent and the too big drawback of hot fluid total amount, in oil reservoir around chemical agent and the hot fluid adding oil well, allow chemical agent and hot fluid follow the crude oil seepage flow in the oil reservoir to be back to this oil well and to rise to ground by this oil well again, realize the oil well chemical agent of oil reservoir-hot fluid associating huff and puff oil recovery mode (or technology) on every side, pass through oil well, with existing method (as pumping) chemical agent and hot fluid are added in this oil well oil reservoir on every side, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make crude oil and chemical agent in the oil reservoir, the smooth seepage flow of hot fluid mixture is back to this oil well, rise to ground by this oil well again, to realize the oil well chemical agent of oil reservoir-hot fluid associating huff and puff oil recovery mode (or technology) on every side;
Described chemical agent and hot fluid can mix the back and add in the oil well oil reservoir on every side on ground, also can in oil well, mix (alternately entering mixing naturally behind pipeline, the oil well as chemical agent and hot fluid) back and add in the oil reservoir around the oil well, also can add respectively in the oil reservoir around the oil well;
Described crude oil and chemical agent, hot fluid mixture mix in oil reservoir naturally; Described crude oil and chemical agent, hot fluid can be in oil reservoir common seepage flow to oil well, can be not yet simultaneously seepage flow or separately seepage flow to oil well;
Described chemical agent, hot fluid all seepage flow are back to oil well, also can part seepage flow be back to oil well and in oil reservoir a residual part;
Described chemical agent-hot fluid associating huff and puff oil recovery mode (or technology) refers to: by oil well chemical agent and hot fluid are added in the oil reservoir, allow crude oil seepage flow in chemical agent, hot fluid and the oil reservoir be back to this oil well again and rise to the oil production method (or technology) on ground by this oil well; Will chemical agent and hot fluid add in the oil reservoir and be " the gulping down " that is commonly called as, allow crude oil seepage flow in chemical agent, hot fluid and the oil reservoir be back to this oil well and to rise to ground by this oil well and be " the telling " that is commonly called as;
Described chemical agent and hot fluid should guarantee can not press in the application of oil reservoir around the adding oil well wears oil reservoir, should guarantee a large amount of pushing tows of the crude oil in the oil reservoir can not advanced in the non-oil reservoir.In order to reach aforementioned target, can determine described chemical agent and hot fluid are added the maximum adding total amount in the oil reservoir, the maximum pressure that adds by existing method as those of ordinary skills.
Open source information shows: the pressure in the oil reservoir is very high, about 10MPa, adds chemical agent in the oil reservoir and hot fluid then can increase formation pressure as the oil reservoir reset pressure of 1000 meters of buried depths; Therefore, when the chemical agent that adds in oil reservoir and hot fluid total amount reach certain limit, just be difficult in oil reservoir, continue to add chemical agent and hot fluid again, perhaps continue to add chemical agent again and hot fluid can increase cost or cause complex process equipmentization; And, if it is too big once to add the total amount of chemical agent and hot fluid in the oil reservoir, can make the crude oil in the oil reservoir exploit out with the crude oil pushing tow in the oil reservoir to apart from the farther oil reservoir of oil well even exceed the scope that oil well seepage flow can control and be difficult to return oil well with chemical agent and hot fluid again; Serious, if it is too big once to add the total amount of chemical agent and hot fluid in the oil reservoir, can make pressure in the oil reservoir surpass the fracture pressure of reservoir rock, cause oil reservoir to be worn by pressure, crude oil pushing tow from oil reservoir is lost to non-oil reservoir, and bring huge destruction to oil reservoir, oil extraction can't normally be carried out again; Therefore, after adding a certain amount of chemical agent and hot fluid in the oil reservoir, need allow in chemical agent, hot fluid and crude oil " seepage flow returns " the oil-feed well in the oil reservoir and from oil well, be raised to ground, the pressure of oil reservoir is minimized, then could be again in oil reservoir, add chemical agent and hot fluid, i.e. oilfield applications " the huff and puff oil recovery technology " that is commonly called as; Therefore, in order effectively to exploit wax precipitation oil reservoir, should at first the oil extraction in the oil reservoir around the oil well be come out.
By hydrodynamics as can be known: owing to there is very high pressure in the oil reservoir, chemical agent and hot fluid are added around the oil well behind the oil reservoir from oil well, can increase the pressure of oil reservoir around the oil well; If the pressure in the oil well is lower than formation pressure, the crude oil in the oil reservoir just can be to oil well seepage flow, and adding chemical agent in the oil reservoir and hot fluid also can seepage flow oil return well; And crude oil and chemical agent, hot fluid can mix by nature in the process of oil well seepage flow.
Further, come out in order to utilize the oil extraction that chemical agent-hot fluid associating huff and puff oil recovery mode (or technology) is controlled oil well in the oil reservoir, and then the purpose of wax precipitation oil reservoir is effectively exploited in realization, with existing method (as pumping) chemical agent is added in the oil well earlier, with existing method (as pumping) hot fluid is added in the oil well then, the chemical agent pushing tow is controlled the precalculated position of oil reservoir with hot fluid to this oil well, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make crude oil and chemical agent in the oil reservoir, the smooth seepage flow of hot fluid mixture is back to this oil well, rises to ground by this oil well again; Repeat these steps then, undertaken by these step cycle, come out with the oil extraction that oil well is controlled in the oil reservoir;
Also can use existing method (as pumping) to add in the oil well on ground or/and mix the back in the oil well chemical agent and its 1-10 hot fluid doubly earlier, with existing method (as pumping) hot fluid is added in the oil well then, the chemical agent pushing tow is controlled the precalculated position of oil reservoir with hot fluid to this oil well, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make crude oil and chemical agent, the smooth seepage flow of hot fluid mixture in the oil reservoir be back to this oil well, rise to ground by this oil well again; Repeat these steps then, undertaken by these step cycle, come out with the oil extraction that oil well is controlled in the oil reservoir;
Also can use existing method (as pumping) to add in the oil well on ground or/and mix the back in the oil well chemical agent and hot fluid earlier, enter into the precalculated position of this oil well control oil reservoir again by oil well, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make crude oil and chemical agent, the smooth seepage flow of hot fluid mixture in the oil reservoir be back to this oil well, rise to ground by this oil well again; Repeat these steps then, undertaken by these step cycle, come out with the oil extraction that oil well is controlled in the oil reservoir;
Also can with existing method (as pumping) chemical agent be added in the oil well earlier, then with special gas with in the chemical agent pushing tow oil-feed layer, with existing method (as pumping) hot fluid is added in the oil well then, the chemical agent pushing tow is controlled the precalculated position of oil reservoir with hot fluid to this oil well, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make crude oil and chemical agent, the smooth seepage flow of hot fluid mixture in the oil reservoir be back to this oil well, rise to ground by this oil well again; Repeat these steps then, undertaken by these step cycle, come out with the oil extraction that oil well is controlled in the oil reservoir;
Also can use existing method (as pumping) to add in the oil well on ground or/and mix the back in the oil well chemical agent and its 1-10 hot fluid doubly earlier, then with special gas with chemical agent, in the hot fluid mixture pushing tow oil-feed layer, with existing method (as pumping) hot fluid is added in the oil well then, the chemical agent pushing tow is controlled the precalculated position of oil reservoir with hot fluid to this oil well, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make crude oil and chemical agent in the oil reservoir, the smooth seepage flow of hot fluid mixture is back to this oil well, rises to ground by this oil well again; Repeat these steps then, undertaken by these step cycle, come out with the oil extraction that oil well is controlled in the oil reservoir;
For fixed tubular column with chemical agent, hot fluid respectively or/and mix the precalculated position that the back adds oil well and then is pushed into oil well control oil reservoir, can be by oil well casing with existing method (as pumping) with chemical agent and hot fluid respectively or/and mix the precalculated position that the back adds oil well and then is pushed into oil well control oil reservoir;
In order to reduce the hot fluid energy consumption, or in order in structure of oil well supporting capacity scope, to improve the hot fluid temperature as far as possible, or enter heat waste and the temperature drop in oil well before the oil reservoir in order to reduce hot fluid, also can be by oil well oil conduit with existing method (as pumping) with chemical agent and hot fluid respectively or/and mix the precalculated position that the back adds oil well and then is pushed into oil well control oil reservoir;
Enter the heat waste in oil well before the oil reservoir in order to reduce hot fluid and/or chemical agent, the temperature that assurance hot fluid, chemical agent enter oil reservoir is higher, earlier in oil well casing, add special gas, then by oil well oil conduit with chemical agent and hot fluid respectively or/and mix the precalculated position that the back adds oil reservoir and then is pushed into oil well control oil reservoir;
Described chemical agent-hot fluid associating huff and puff oil recovery mode (or technology) refers to: chemical agent and hot fluid are added in the oil reservoir, allow crude oil seepage flow in chemical agent, hot fluid and the oil reservoir be back to oil well again and rise to the oil production method (or technology) on ground by oil well; Will chemical agent and hot fluid add in the oil reservoir and be " the gulping down " that is commonly called as, allow crude oil seepage flow in chemical agent, hot fluid and the oil reservoir be back to oil well and to rise to ground by oil well and be " the telling " that is commonly called as;
Described oil well control oil reservoir: refer to centered by oil well, half be the oil reservoir in the radius with the oil well spacing, also refer to the oil reservoir controlled in the oil well design control range, the design of its concrete scope, index etc. is the maturation method that the oil field is used always;
Described precalculated position refers to: the oil reservoir position that predefined chemical agent, hot fluid should arrive, can also can handle volume as representing index with oil reservoir with the oil reservoir treatment radius as representing index; Described oil reservoir treatment radius refers to that with oil well bottom centre be the radius that round dot, chemical agent and hot fluid can arrive in oil reservoir; Described oil reservoir is handled volume and refer to the total reservoir volume that line, chemical agent and hot fluid can arrive centered by well center in oil reservoir.Can determine the specific targets of described precalculated position, oil reservoir treatment radius, oil reservoir processing volume, technical scheme etc. as those of ordinary skills by having method and oil-water well, oil reservoir data now;
Described crude oil and chemical agent, hot fluid mixture mix in oil reservoir naturally; Described crude oil and chemical agent, hot fluid can be in oil reservoir common seepage flow, also not seepage flow or seepage flow simultaneously separately;
Described chemical agent, hot fluid all seepage flow are back to oil well, also can part seepage flow be back to oil well and in oil reservoir a residual part;
Described oil well spacing refers to: the designed distance between two mouthfuls of wells, belong to oilfield design term, and its establishing method, technical scheme are oil field maturation methods commonly used; Open source information shows: the oil well spacing in domestic oil field is generally 100-500 rice, the oil well spacing of a small amount of oil well is also arranged outside this scope.
Open source information shows: the basic exploitation method of oil reservoir is to build oil well at oil reservoir, controls corresponding oil reservoir scope with oil well, by oil well the oil extraction in its control oil reservoir is come out then, belongs to ripe method at home; The construction of oil well also belongs to ripe method.
Open source information shows: oil well is communicated with oil reservoir, and the crude oil in the oil reservoir can enter oil well; Otherwise, fluid is added in the oil well, also can enter in the oil reservoir by oil well.
Open source information shows: oil well generally has oil pipe and sleeve pipe, and oil pipe has annular space between oil pipe and sleeve pipe in sleeve pipe, and oil pipe can be communicated with sleeve pipe and is communicating pipe, also can be with the packer sealing for not being communicated with.
Open source information shows: moving tubing string belongs to oil well operation category, and expense is higher, so fixed tubular column can reduce operating expenses, the saving cost for oil production.
Further, for chemical agent and hot fluid are added in the oil reservoir, also can be by water injection well with existing method (as pumping) with chemical agent and hot fluid respectively or/and mix the back and add in the oil reservoir, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground with existing method again;
For fixed tubular column chemical agent and hot fluid are added in the oil reservoir, also can overlap effective existing method (as pumping) by water injection well chemical agent and hot fluid are added in the oil reservoir;
In order to reduce the hot fluid energy consumption, or in order in water injection well structural-load-carrying capacity scope, to improve the hot fluid temperature as far as possible, or enter heat waste and the temperature drop in water injection well before the oil reservoir in order to reduce hot fluid, also can with existing method (as pumping) chemical agent and hot fluid be added in the oil reservoir by injection well tubing;
Described mixing can refer to chemical agent and hot fluid in the mixing on ground, also can refer to mixing in water injection well of chemical agent and hot fluid (alternately entering mixing naturally behind pipeline, the water injection well as chemical agent and hot fluid);
Described mixing should be able to guarantee that chemical agent and hot fluid effectively contacts and joint synergy in oil reservoir, the effective wax crystalline substance in fusing (or dissolving) oil reservoir, and the wax precipitation temperature of crude oil in the reduction oil reservoir makes the smooth seepage flow of crude oil in the oil reservoir to oil well.For reaching aforementioned target, as those of ordinary skills can determine by existing method whether described chemical agent and hot fluid need to mix before adding oil reservoir and whether need be on ground or/and mix in the water injection well, and can determine concrete technical schemes such as hybrid mode that described chemical agent and hot fluid adopt when mixing, mixed proportion.
Further, enter the heat waste in water injection well before the oil reservoir in order to reduce hot fluid and/or chemical agent, the temperature that assurance hot fluid, chemical agent enter oil reservoir is higher, earlier in the water injection well sleeve pipe, add special gas, in oil reservoir, add chemical agent and hot fluid by injection well tubing then, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Described special gas should be able to guarantee effectively to reduce hot fluid, the chemical agent heat waste in water injection well.For reaching aforementioned target, can determine minimum addition, the maximum adding quantity of described special gas by existing method as those of ordinary skills.
Further, in order to exploit wax precipitation oil reservoir normally, effectively, also can pass through water injection well, periodically in oil reservoir, add chemical agent and hot fluid, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then.；
Described chemical agent and hot fluid can be on ground or/and mix the back in the water injection well and add in the oil reservoir, also can add respectively in the oil reservoir;
Described periodicity can refer to the mode of fixed cycle, also can refer to the mode that the cycle is indefinite.
Open source information shows: though the oil reservoir bulky of water injection well control, because the pressure in the oil reservoir is very high, the chemical agent and the hot fluid that once inject flood tide in the oil reservoir can make formation pressure very high, can significantly increase construction cost or cause complex process equipmentization; Therefore, should be in batches or periodically in oil reservoir, add chemical agent and hot fluid, after in oil reservoir, adding a certain amount of chemical agent and hot fluid, allow again and add in chemical agent, hot fluid and crude oil " seepage flow returns " the oil-feed well in the oil reservoir and from oil well, be raised to ground, the pressure of oil reservoir is minimized, and then in oil reservoir, add chemical agent and hot fluid, form " huff and puff oil recovery technology " that oilfield applications is commonly called as, could effectively exploit wax precipitation oil reservoir.
Further, for the residual crude oil in the oil reservoir around the water injection well is exploited out, and then the purpose of wax precipitation oil reservoir is effectively exploited in realization, earlier water injection well is converted to oil well, with the aforementioned chemical agent among the present invention-hot fluid associating huff and puff oil recovery mode (or technology) residual crude oil in the oil reservoir around the water injection well is exploited out then;
Described water injection well should possess the condition that allows crude oil rise to ground (namely recovering the oil), can the definite concrete mode of production, the technical scheme that described water injection well is converted into oil well of enough existing methods as those of ordinary skills.
Open source information shows: by oil well be converted to water injection well around have a large amount of residual crude oil in the oil reservoir, with the method for common water filling is very difficult it is exploited out; Be example with quiet 35, though once carrying out the heat of 90 ℃ of well head water temperatures, the water injection well of this block annotated test, but the normal water filling before and after heat is annotated off-test is used in producing to be normal oilfield sewage, its well head water temperature is generally 40-50, be lower than the crude oil wax precipitation temperature of this block, therefore enter behind the oil reservoir can aggravation wax crystalline substance formation, will inevitably cause more crude oil to remain in the oil reservoir and can't extraction, cause the wasting of resources; Therefore, it is necessary the residual crude oil in the oil reservoir around the water injection well being exploited out; Because it is ripe method that water injection well is converted into oil well, so water injection well can be expected with the effect of aforementioned chemical agent among the present invention-hot fluid associating huff and puff oil recovery mode (or technology).
By hydrodynamics as can be known: owing to there is very high pressure in the oil reservoir, behind oil reservoir around chemical agent and the hot fluid adding water injection well, can increase the water injection well pressure of oil reservoir on every side; If the pressure in the water injection well is lower than formation pressure, the crude oil in the oil reservoir just can be to water injection well seepage flow, and adding chemical agent in the oil reservoir and hot fluid also can seepage flow re-injection well; And crude oil and chemical agent, hot fluid can mix by nature in the process of water injection well seepage flow.
Further, for the oil extraction that water injection well is controlled in the oil reservoir is come out, and then the purpose of wax precipitation oil reservoir is effectively exploited in realization, earlier water injection well is converted to oil well, comes out with the oil extraction that aforementioned chemical agent among the present invention-hot fluid associating huff and puff oil recovery mode (or technology) is controlled water injection well in the oil reservoir then;
Described water injection well control oil reservoir: refer to centered by water injection well, half is the oil reservoir in the radius with the oil well spacing between water injection well and oil well, also refer to the interior oil reservoir of controlling of water injection well design control range, also can refer to be converted into the original oil well control oil reservoir of oil well of water injection well, the design of its concrete scope, index etc. is oil field maturation method commonly used;
Described water injection well should possess the condition that allows crude oil rise to ground (namely recovering the oil), can the definite concrete mode of production, the technical scheme that described water injection well is converted into oil well of enough existing methods as those of ordinary skills.
Open source information shows: the recovery ratio of wax precipitation oil reservoir is very low, with quiet 35 be example, its recovery ratio more than 15 years has only 3%, its projected ultimate recovery has only 10%, its Theoretical Calibration ultimate recovery is 20%; Therefore, no matter water injection well is converted by oil well still is newly-built, still also has the crude oil of 80%-97% in the oil reservoir of controlling, and can not cause the wasting of resources if exploit out; Because it is ripe method that water injection well is converted into oil well, so water injection well can be expected with the effect of aforementioned chemical agent among the present invention-hot fluid associating huff and puff oil recovery mode (or technology).
Further, in order to utilize the more economical wax precipitation oil reservoir of exploiting effectively of chemical agent-hot fluid associating displacement of reservoir oil oil production method (or technology), improve the oil reservoir ultimate recovery, a kind of exploitation method for wax precipitation oil reservoir of the present invention, may further comprise the steps: pass through centerwell, with existing method (as pumping) chemical agent and hot fluid are added in the oil reservoir, wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, and order about in the producing well of the smooth seepage flow of crude oil around the centerwell in the oil reservoir, allow crude oil from producing well, rise to ground again, so that the oil extraction in the oil reservoir is come out;
For fixed tubular column chemical agent, hot fluid are added in the oil reservoir, can with existing method (as pumping) chemical agent and hot fluid be added in the oil reservoir by oil well casing;
In order to reduce the hot fluid energy consumption, or in order in structure of oil well supporting capacity scope, to improve the hot fluid temperature as far as possible, or enter heat waste and the temperature drop in oil well before the oil reservoir in order to reduce hot fluid, also can with existing method (as pumping) chemical agent and hot fluid be added in the oil reservoir by oil well oil conduit;
Enter the heat waste in oil well before the oil reservoir in order to reduce hot fluid and/or chemical agent, the temperature that assurance hot fluid, chemical agent enter oil reservoir is higher, earlier in oil well casing, add special gas, by oil well oil conduit chemical agent and hot fluid are added in the oil reservoir then; Described special gas also can periodically add in the oil well casing, enters loss in the oil reservoir to replenish described special gas;
Described centerwell refers to: being used for the oil well in chemical agent and the hot fluid adding oil reservoir, can be oil well, also can be water injection well, also can be that the special chemical agent of building and/or hot fluid inject well, generally need not produce crude oil;
Described producing well: can refer to oil well, the water injection well that also can refer to possess the oil recovery condition, can be converted to oil well can refer to 1 mouthful of well, also can refer to the well more than 2 mouthfuls and 2 mouthfuls; Can be the well that builds up according to existing oil field development technical scheme, also can be the oil well of anti-5 or anti-9 layouts; Can be production well, also can be the prospect pit that possesses the oil recovery condition;
Described centerwell should be able to be communicated with by oil reservoir with producing well;
Described chemical agent-hot fluid associating displacement of reservoir oil oil production method or technology: refer to add chemical agent and hot fluid from centerwell, the crude oil seepage flow that allows chemical agent, hot fluid order about in the oil reservoir rises to oil production method or the technology on ground to producing well and by producing well, and crude oil seepage flow to the producing well that allows chemical agent, hot fluid order about in the oil reservoir is " driving " that the oil field is commonly called as;
Described chemical agent and hot fluid can be on ground or/and mix the back in the centerwell and add in the oil reservoir, also can distinguish or alternately add in the oil reservoir; Can continuously add in the oil reservoir always, also can suspend the concrete time that adds in the oil reservoir or adjust the adding oil reservoir at any time according to producing needs; Can enough existing methods determine that described chemical agent and hot fluid add the concrete technical scheme in the oil reservoir as those of ordinary skills;
Described centerwell should be able to satisfy the chemical agent-hot fluid associating displacement of reservoir oil oil production method of centerwell adding-producing well extraction or the needs of technology, satisfy the needs of wax precipitation oil reservoir exploitation, can enough existing methods determine that described centerwell is in particular geographic location and the requirement of wax precipitation oil reservoir as those of ordinary skills, can determine chemical agent and hot fluid are added concrete grammar, technical scheme the oil reservoir from centerwell, and can determine the technical schemes such as concrete quantitative proportion, relative position of itself and described producing well;
Described producing well should be able to satisfy the chemical agent-hot fluid associating displacement of reservoir oil oil production method of centerwell adding-producing well extraction or the needs of technology, satisfy the needs of wax precipitation oil reservoir exploitation, can enough existing methods determine that described producing well is in particular geographic location and the requirement of wax precipitation oil reservoir as those of ordinary skills, can determine that it allows crude oil rise to the concrete mode of production, the technical scheme on ground, and can determine the technical scheme such as concrete quantitative proportion, relative position of itself and described centerwell.
Open source information shows: recovery ratio, the ultimate recovery that water drive, chemical flooding, steam flooding, surfactant flooding, gas such as drive at the oil production method of various " driving " is higher than the oil production method of corresponding " handling up ", so the effect of chemical agent-hot fluid associating displacement of reservoir oil oil production method is better than chemical agent-hot fluid associating huff and puff oil recovery mode and can expects.
Open source information shows: after oil reservoir was produced a period of time, the pressure ratio reset pressure in the oil reservoir was much lower; The water filling production practices show: oilfield sewage can be by water injection well seepage flow in its oil well on every side; Therefore, the chemical agent of centerwell adding-producing well extraction-hot fluid associating displacement of reservoir oil oil production method can be implemented in actual production and can expect.
Open source information shows: the general employing of oil-field flooding mode at present anti-5 or anti-9 arrangements, that is: water injection well is at the center, 5 mouthfuls of oil wells or 9 mouthfuls of oil well production crude oil are arranged around the water injection well, anti-5 water floods of being commonly called as of 5 mouthfuls of oil wells are arranged around the water injection well, anti-9 water floods of being commonly called as of 9 mouthfuls of oil wells are arranged around the water injection well; Therefore, utilize centerwell that chemical agent and hot fluid are added in the oil reservoir, utilize 5 mouthfuls or 9 mouthfuls of Production Wells crude oil around the centerwell, similar to corresponding anti-5 water floods, anti-9 water flood principles, so its effect can be expected; Also therefore, the chemical agent-hot fluid associating displacement of reservoir oil oil production method effect of 1 mouthful of corresponding centerwell adding-producing well extraction of producing well more than 1 mouthful or 2 mouthfuls or 2 mouthfuls of centerwell also can be expected.
Open source information shows: prospect pit also can be converted to production well, is method and normal occurrence ripe in the field produces.
Further, for permeability, degree of porosity and the percolation ability that improves oil reservoir, the more economical wax precipitation oil reservoir of exploiting effectively earlier carries out acidifying with existing method to oil reservoir or/and pressure break, with permeability, degree of porosity and the percolation ability of raising oil reservoir; Add chemical agent and hot fluid again in the oil reservoir, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Described acidifying refers to: the acid treatment of oil-water well is a kind of maturation process method commonly used during oil recovery is produced, and can be applied to oil well, also can be applied to water injection well; Described acidifying can periodically be carried out, and is generally only carrying out once with a bite oil well or well but open source information shows described pressure break;
Described pressure break refers to: with pressure, fracturing fluid etc. oil reservoir being pressed off and form the crack, is a kind of maturation process method commonly used during oil recovery is produced, and can be applied to oil well, also can be applied to water injection well;
Described acidifying, pressure break should be able to guarantee that its used material does not react with described chemical agent generation adverse chemical.For reaching aforementioned target, can utilize existing method to determine the technical scheme of described acidifying, pressure break as those of ordinary skills, and can determine the concrete kind of its used material.
Open source information shows: described acidifying, pressure break are the maturation process method, can independently carry out separately or unite and carry out, can not change crude oil property and reservoir temperature in the oil reservoir, the wax crystalline substance of separating out in (or dissolving) oil reservoir can not be melted, but permeability, degree of porosity and the percolation ability of oil reservoir can be improved; Therefore, earlier oil reservoir is carried out acidifying or/and pressure break adds chemical agent and hot fluid again in oil reservoir, the exploitation that more is conducive to crude oil seepage flow and wax precipitation oil reservoir can be expected.
Further, in order to prevent that chemical agent from entering high infiltration water layer in a large number and causing the chemical agent waste, also in order to allow chemical agent enter same oil well more equably or/and the different permeabilities position of the different permeability oil reservoirs in the water injection well or same oil reservoir, in the hole, and guarantee that chemical agent and hot fluid can add in the oil reservoir smoothly, earlier to oil well or/and water injection well or/and hot fluid is squeezed in the oil reservoir pilot scale, in oil reservoir, add chemical agent and hot fluid again, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Described examination is squeezed and to be referred to: to oil well or/and water injection well or/and water-filling method or the process of experimental or the exploratory or scouting property that oil reservoir carries out, therefore can at every turn to oil well or/and water injection well or/and carry out before adding chemical agent and hot fluid in the oil reservoir, open source information shows: described examination squeeze is the oil field recover the oil produce in maturation process method commonly used, can at every turn to oil well or/and water injection well or/and add chemical agent and hot fluid in the oil reservoir
Described examination is squeezed should be able to guarantee that chemical agent and hot fluid add in the oil reservoir smoothly, reduce the chemical agent waste, allow chemical agent enter same oil well more equably or/and in the different permeabilities position of the different permeability oil reservoirs in the water injection well or same oil reservoir, hole, and meet the regulation requirement of the countries concerned's standard, industry standard, company standard.For reaching aforementioned target, can determine that with existing method concrete examination squeezes technical scheme as those of ordinary skills, and the lab scale that can determine to try to squeeze the temperature range of used hot fluid and hot fluid squeezes amount, maximum examination is squeezed and measured.
The hot fluid that usefulness is squeezed in described examination also can contain expansion-resisting agent or/and surfactant, and the expansion-resisting agent that contains should be able to effectively reduce hot fluid and enter the clay swell that oil reservoir causes, and can guarantee not produce the adverse chemical reaction with described chemical agent; The surfactant that contains should be able to effectively reduce the grains of sand (or rock) in hot fluid and the oil reservoir, the interfacial tension of crude oil, and can guarantee not produce the adverse chemical reaction with described expansion-resisting agent, chemical agent.For reaching aforementioned purpose, as those of ordinary skills can determine described expansion-resisting agent with existing method or/and the concrete composition of surfactant with and Cmin, Cmax in hot fluid.
Open source information shows: reservoir oil layer has complicated geological characteristics and non-homogeneity; With quiet 35 be example, the Liaohe Oil Field open source information shows: quiet 35 reservoir pore spaces are mainly intergranular pore, and the pore throat radius is 2.83 microns, and a small amount of corrosion hole and crack are arranged; Porosity type be height ooze the inhomogeneous type of the thin larynx of macropore and in ooze the inhomogeneous type of the thin larynx of macropore, pore radius is generally 5～50 microns, 13 microns of average out to; Reservoir pore throat uniformity coefficient is 0.342, and non-homogeneity is serious, the general 17-24% of reservoir porosity, and permeability is generally 200～2000 * 10
-3Um
2, surplus the permeability variation scope can reach 10 times; The producing well segment length is 50～150 meters, 24 meters of oil reservoir average thickness, and 0.1～8 meter of individual layer core intersection, 3～25 layers of the individual well oil reservoir numbers of plies, 3.1 meters of average mud stone thickness of interlayer have a small amount of gas enclosure layer and water trapping layer, and most of well has oil-water common-layer more than 1 layer; Therefore, in order to prevent that chemical agent from entering high infiltration water layer in a large number and causing the chemical agent waste, also in order to allow chemical agent enter same oil well more equably or/and in the different permeabilities position of the different permeability oil reservoirs in the water injection well or same oil reservoir, hole, and guarantee that chemical agent and hot fluid can add in the oil reservoir smoothly, need before in oil reservoir, adding chemical agent and hot fluid, squeeze hot fluid to the oil reservoir pilot scale earlier.
Further, waste chemical agent in order to prevent chemical agent from entering the high permeability water layer in a large number, allow chemical agent more enter in the oil reservoir, earlier in oil reservoir, add organic solvent, in oil reservoir, add chemical agent and hot fluid again, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Described organic solvent should be water insoluble, should be able to water layer or/and the water in the oil reservoir forms effective liquid-liquid interface when contacting, should be able to utilize the formed interfacial tension of this liquid-liquid interface effectively to hinder chemical agent and enter in the water layer, and in the application that adds to oil reservoir, meet the countries concerned's standard or industry standard or company standard regulation and requirement.For reaching aforementioned purpose, can determine the concrete composition of described organic solvent or substance classes, minimum addition, maximum adding quantity as those of ordinary skills with existing method.
Open source information shows: water and water-fast organic solvent such as oil, can form oil-water interface, and produce interfacial tension; Because the space pore throat in the oil reservoir belongs to the capillary tube category, relevant calculation can show; It is very big to be in interfacial tension or capillary force that oil-water interface wherein produces, and can effectively hinder has oil-water interface displacement in capillary tube; Therefore, described organic solvent, and utilizes the formed interfacial tension of this liquid-liquid interface effectively to hinder chemical agent to enter in the water layer or/and the water in the oil reservoir can form effective liquid-liquid interface when contacting with water layer.
Further, increase the crude oil filtrational resistance in order to prevent hot fluid from causing the clay swell in the oil reservoir, in oil reservoir, add chemical agent, expansion-resisting agent and hot fluid, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, reduce hot fluid and add the clay swell that causes in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Also can in oil reservoir, add expansion-resisting agent earlier, in oil reservoir, add chemical agent and hot fluid again.
Described expansion-resisting agent can effectively reduce hot fluid and add the clay swell that causes in the oil reservoir, and guarantees that it meets regulation and the requirement of the countries concerned's standard or industry standard or company standard in the application that adds oil reservoir.For reaching aforementioned target, can utilize existing method to determine the concrete composition of described expansion-resisting agent, concrete type of merchandize as those of ordinary skills, the concrete adding method that can determine described expansion-resisting agent adding oil reservoir reaches and technical schemes such as chemical agent, hot fluid adding order, and can determine its minimum addition, maximum adding quantity.
Open source information shows: the potassium chloride in the sylvite belongs to the expansion-resisting agent category, does not produce the adverse chemical reaction with surfactant.
Further, in order to improve the sweep efficiency of formation pressure and hot fluid, in oil reservoir, add special gas or foam solution earlier, in oil reservoir, add chemical agent and hot fluid again, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Also can in oil reservoir, add chemical agent earlier, in oil reservoir, add special gas or foam solution and hot fluid again;
Also can in oil reservoir, add chemical agent or/and in the hot fluid, in oil reservoir, add special gas or foam solution;
Also can in oil reservoir, add chemical agent or/and after hot fluid finishes, in oil reservoir, add special gas or foam solution.
Described foam solution refers to: by the foam solution that special gas and blowing agent, water are formed, and described blowing agent preferred nonionic surfactants;
Describedly add special gas in the oil reservoir or foam solution refers to: add the process and method of special gas or foam solution in the oil reservoir, be the oil field recover the oil produce in maturation process method commonly used.
Described special gas or foam solution should be able to effectively improve the sweep efficiency of formation pressure and hot fluid, should guarantee not produce the adverse chemical reaction with described chemical agent, and in the application that adds to oil reservoir, meet the regulation requirement of the countries concerned's standard, industry standard, company standard.For reaching aforementioned purpose, the concrete component of described special gas or foam solution, concrete kind, adding temperature, minimum pressure, maximum pressure, minimum addition, the maximum adding quantity of adding of adding can be determined as those of ordinary skills with existing method, the concrete grammar of described foam solution formation, concrete technical scheme can be determined.
Open source information shows: add special gas or foam solution in the oil reservoir and be the oil field recover the oil produce in maturation process method commonly used, can independently carry out separately or unite and carry out, described foam solution can effectively improve the sweep efficiency (referring to " oilfield chemistry " the 118th page of inverse the 10th row of publishing house of University of Petroleum the 1st edition the 1st printing July in 2007 described " because the viscosity of foam is greater than water; so it has the sweep efficiency greater than water ") of hot fluid, and described special gas can effectively improve formation pressure; Therefore, in oil reservoir, add special gas or foam solution earlier, in oil reservoir, add chemical agent and hot fluid again, will more be conducive to the exploitation of crude oil seepage flow and wax precipitation oil reservoir.
Open source information shows: meet adverse chemicals such as can the producing precipitation reaction of anion surfactant and cationic surfactant, if described chemical agent contains anion surfactant, described foam solution just can not contain cationic surfactant, and vice versa.
Further, in order to improve formation pressure, in oil reservoir, add the inert gas releasing agent aqueous solution earlier, in oil reservoir, add chemical agent and hot fluid again, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, improve formation pressure, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Also can in oil reservoir, add chemical agent earlier, in oil reservoir, add inert gas releasing agent and hot fluid again;
Described inert gas releasing agent refers to: the mixture a kind of or that two or more arbitrary proportion is mixed between them of urea, ammonium carbonate, carbonic hydroammonium, ammonium nitrate or ammonium nilrite;
The described inert gas releasing agent aqueous solution should be able to be under 200 ℃ hot environment or oil reservoir in gentle pyrolysis takes place, discharge inert gas, and in the application that adds oil reservoir, meet regulation and the requirement of the countries concerned's standard, industry standard, company standard.For reaching aforementioned target, determine the concrete composition of described inert gas releasing agent as the enough existing methods of those of ordinary skills' energy, can determine Cmin, the Cmax of the described inert gas releasing agent aqueous solution, can determine that the described inert gas releasing agent aqueous solution adds minimum addition, the maximum adding quantity in the oil reservoir;
The maximum level of described inert gas releasing agent ammonium nilrite that the aqueous solution contains and/or ammonium nitrate can not surpass 5%, and the ammonium nilrite and/or the pure product maximum adding quantity of ammonium nitrate that are added in the oil reservoir can not be above 10 tons.For reaching aforementioned target, can enough existing methods determine that described inert gas releasing agent contains the maximum level of ammonium nilrite and/or ammonium nitrate, minimum content as those of ordinary skills, and can determine to contain maximum adding quantity, the minimum addition of the described inert gas releasing agent of ammonium nilrite and/or ammonium nitrate;
Described hot fluid also can contain inert gas releasing agent and/or expansion-resisting agent;
Described chemical agent also can contain the inert gas releasing agent, also can not contain the inert gas releasing agent;
Open source information shows: the ammonium nilrite crystal reacts quickening when being heated, and can explode in time more than 60 ℃; Ammonium nitrate can resolve into ammonium nilrite more than 110 ℃; Therefore, ammonium nilrite, the aqueous ammonium nitrate solution of concentration more than 10% has danger, it added in the oil reservoir can violate the standard code of relevant oilfield enterprise and requirement, do not belong to inert gas releasing agent category of the present invention.
Further, in order to utilize liquid carbon dioxide to improve formation pressure, reduce the viscosity of crude in the oil reservoir, in oil reservoir, add extraordinary chemical agent earlier, in oil reservoir, add liquid carbon dioxide again, in oil reservoir, add hot fluid again, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Also can in oil reservoir, add chemical agent or/and in the hot fluid, in oil reservoir, add liquid carbon dioxide;
Also can in oil reservoir, add chemical agent (or extraordinary chemical agent) or/and in the hot fluid, add special gas in oil reservoir or/and in the hot fluid;
In order to reduce the harm that liquid carbon dioxide is vaporized and lowered the temperature and produce in oil well, oil reservoir, also can in oil reservoir, add hot fluid earlier, improve oil well and reservoir temperature, in oil well, add liquid carbon dioxide and chemical agent again, in oil well, add hot fluid again;
Freeze in order to prevent that hot fluid from contacting with liquid carbon dioxide in oil well, also can with special gas liquid carbon dioxide be pushed in the oil reservoir earlier, in oil well, add extraordinary chemical agent and hot fluid again;
Also can when in oil reservoir, adding hot fluid, add foam solution in oil reservoir or/and in the hot fluid;
Described extraordinary chemical agent refers to: freezing point is lower than-18 ℃, water content less than 0.5% chemical agent;
Described liquid carbon dioxide, extraordinary chemical agent also can add in oil well or the water injection well simultaneously with arbitrary proportion;
Described liquid carbon dioxide is commodity;
Described liquid carbon dioxide should be able to effectively improve formation pressure, effectively reduces the viscosity of crude in the oil reservoir, and meets the regulation requirement of the countries concerned's standard, industry standard, company standard in the application that adds to oil reservoir.For reaching aforementioned purpose, can determine that with existing method the minimum of described liquid carbon dioxide adds pressure, maximum pressure, minimum addition, the maximum adding quantity of adding as those of ordinary skills.
" oilfield chemistry " the 134th page of the 13rd row of publishing house of University of Petroleum the 1st edition the 1st printing July in 2007 shows: " the carbon dioxide oil-soluble makes oily viscosity reduction "; Therefore, in oil reservoir, add liquid carbon dioxide, chemical agent and hot fluid, will more be conducive to the exploitation of crude oil seepage flow and wax precipitation oil reservoir.
Further, in order to bring into play the joint synergy of microorganism and chemical agent, hot fluid, more effectively reduce the wax precipitation temperature of crude oil in oil reservoir, earlier in oil reservoir, add microbial liquid, in oil reservoir, add chemical agent and hot fluid again, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, relief crude oil rises to ground from oil well;
Also can in oil reservoir, add chemical agent earlier, in oil reservoir, add microbial liquid and hot fluid again;
Described chemical agent and/or hot fluid also can contain microbial liquid, can enough existing methods determine that it contains the minimum content of microbial liquid, maximum level as those of ordinary skills;
Described microbial liquid also can contain surfactant or/and expansion-resisting agent, and described surfactant is or/and expansion-resisting agent can not effectively suppress, killing microorganisms;
Described microbial liquid refers to: the aqueous solution or other liquid that contain bacterium alive or other viable microbials;
Described microbial liquid should be able to effectively be survived in oil reservoir and be bred and effectively consume paraffin molecule or/and can produce biosurfactant.For reaching aforementioned purpose, can determine the concrete composition of the concrete title of microorganism, microbial liquid as those of ordinary skills with existing method, can determine minimum, peak discharge that it adds in the oil reservoir.
The temperature of described hot fluid should guarantee effectively to suppress, killing microorganisms, and described chemical agent should guarantee effectively to suppress, killing microorganisms.For reaching aforementioned target, can enough existing methods determine the temperature range of hot fluid as those of ordinary skills, can determine the concrete composition of described chemical agent.
Open source information shows: there are numerous wax bacteriums that bite in nature, and isolatedly from the oily sludge of oil well well site efficiently bites the wax bacterium, can effectively consume the wax molecule; A large amount of experiments both at home and abroad show: microorganism can breed in oil reservoir, survive, and can generate biosurfactant, is at home and abroad applied in the non-wax precipitation oil reservoir production; Therefore, in the wax precipitation oil reservoir exploitation, the combination and cooperation effect that it has can be expected with described microbial liquid and described chemical agent and hot fluid use in conjunction.
Further, for the wax precipitation temperature of more effective reduction crude oil in oil reservoir, in oil reservoir, add peroxide aqueous solution earlier, in the oil reservoir oil reservoir, add chemical agent and hot fluid again;
Also can add chemical agent to oil reservoir earlier, in oil reservoir, add peroxide aqueous solution and hot fluid again;
Described peroxide refers to: any one of performic acid, cumyl peroxide, dibenzoyl peroxide, methyl ethyl ketone peroxide, peroxidized t-butyl perbenzoate, cyclohexanone peroxide, tertbutanol peroxide, cumyl hydroperoxide, hydrogen peroxide, sodium peroxide, carbamide peroxide, sodium peroxydisulfate or SODIUM PERCARBONATE or the mixture of two or more arbitrary proportion arbitrarily.
Described peroxide aqueous solution maximum concentration is no more than 3%;
Described peroxide can guarantee that it can decomposite free oxygen and maybe can destroy the structure that asphaltene molecules, wax molecule carbon chain maybe can destroy asphalitine phase, wax crystalline substance in oil reservoir, and it should meet the regulation requirement of the countries concerned's standard, industry standard, company standard in adding the application of theory of evolution agent and/or hot fluid.For reaching aforementioned purpose, can determine the concrete composition of described peroxide, minimum addition, maximum adding quantity as those of ordinary skills with existing method.
Open source information shows: described peroxide has strong oxidisability, can effectively break the structure of asphalitine phase, wax crystalline substance, can be reacted by the micro heavy ionic catalysis in the oil reservoir; Therefore, the peroxide aqueous solution of concentration more than 5% has danger, it added in the oil reservoir can violate the standard code of relevant oilfield enterprise and requirement.
Laboratory test shows: the peroxide aqueous solution of content 2% is added in 35 blocks of crude oil in meditation, can will hang down this crude oil wax precipitation temperature more than 1 ℃.
Further, for the chemical agent with the nonfluid shape adds in the oil reservoir, earlier with existing method the chemical agent of described nonfluid shape is made temperature and be less than or equal to the liquid of hot fluid temperature (or emulsion, suspension), and then add this liquid (or emulsion, suspension) and hot fluid in the oil reservoir, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, relief crude oil rises to ground from oil well;
The chemical agent of described nonfluid shape refers to be under the construction temperature at the scene the chemical agent of solid content;
Described fluid temperature should be less than or equal to the hot fluid temperature and have good flowability under this temperature, can utilize existing method to determine the temperature of making of described liquid (or emulsion, suspension) as those of ordinary skills, and can determine whether it needs insulation and insulation or tracing thermal-insulating technical scheme accordingly.
For solving the problems of the technologies described above, a kind of exploitation method for wax precipitation oil reservoir of the present invention may further comprise the steps:
By oil well or/and the water injection well sleeve pipe produced of can recovering the oil or/and oil pipe, in the oil reservoir of near wellbore zone, add 1-10 ton chemical agent and 10-100 ton hot fluid, to remove the near wellbore zone oil layer blocking, the crude oil that makes the oil reservoir deep smoothly seepage flow oil-feed well or/and the water injection well that can recover the oil and produce allows crude oil from oil well or/and rise to ground the water injection well of producing that can recover the oil with existing method again;
Further, also can be by oil well or/and the water injection well sleeve pipe produced of can recovering the oil or/and oil pipe, in the oil reservoir of near wellbore zone, add the methyl naphthalene that is in a liquid state under the 1-10 ton normal temperature, methyl naphthalene liquid, mixture and 50-10000 standard cubic meter special gas that any one or two or more arbitrary proportion of extraordinary organic liquid mixes, with special gas this mixture is pushed in the oil reservoir, to remove the near wellbore zone oil layer blocking, the crude oil that makes the oil reservoir deep smoothly seepage flow oil-feed well or/and the water injection well that can recover the oil and produce allows crude oil from oil well or/and rise to ground the water injection well of producing that can recover the oil with existing method again;
Further, chemical agent and hot fluid also can be at ground or oil well casing or/and oil pipe mixes the back adds in the oil reservoir;
The surface temperature of described chemical agent should be higher than 25 ℃, can add before hot fluid in the oil reservoir;
Described hot fluid surface temperature should be higher than 80 ℃, adds oil well casing or/and the flow of oil pipe should be greater than 5 tons/hour;
Described chemical agent is no more than 50% expansion-resisting agent or/and hot fluid also can contain 1-10 ton valid density.
Described chemical agent and hot fluid should be able to synergy, effectively melt or dissolve the near wellbore zone by the wax crystalline substance or/and the organic matter that asphalitine etc. form, and in the application that adds to the near wellbore zone oil reservoir, should meet regulation and the requirement of the countries concerned's standard or industry standard or company standard.For reaching aforementioned target, can utilize existing method to determine concrete composition, the kind of described chemical agent as those of ordinary skills, can determine that described chemical agent, hot fluid are in preferred temperature, the maximum temperature on ground.
Because chemical agent of the present invention and hot fluid can effectively reduce the brilliant dewaxing temperature of wax in the oil reservoir, the wax crystalline substance in (or dissolving) oil reservoir can be effectively melted in the two synergy; Because the mixture that any one or two or more arbitrary proportion of the methyl naphthalene that is in a liquid state under the normal temperature of the present invention, methyl naphthalene liquid, extraordinary organic liquid mixes can effectively dissolve the wax crystalline substance, and enter can not form behind the oil reservoir and solidify; Therefore those of ordinary skills can expect that according to technical scheme of the present invention and experimental data it removes adjacent to oil well area wax crystalline substance or/and organic matters such as asphalitine stop up the effect of oil reservoir.
Further, produce sediment in order to prevent that water chemistry in described hot fluid and the oil reservoir is incompatible and stop up the oil reservoir hole, perhaps for prevent described hot fluid oil well or/water injection well is or/and serious fouling in the oil reservoir, perhaps in order to prevent the serious fouling in the heat temperature raising equipment installation of described hot fluid, earlier with hot fluid before heating or/and carry out scale control treatments after the heating, and then add oil well or/water injection well or/oil reservoir in;
Should be able to guarantee after described hot fluid is handled that it mixes with water in the oil reservoir can not produce sediment and stop up the oil reservoir hole, not can oil well or/water injection well, equipment, pipeline, oil reservoir in serious fouling.For reaching aforementioned purpose, those of ordinary skills can determine hot fluid is carried out the concrete technical scheme of scale control treatments.
Further, described hot fluid can add oil well and/or water injection well and/or/be heated to 110～200 ℃ with existing heating means before the oil reservoir, improving or to keep the hot fluid temperature, as with heating furnace heating, electrical heating method, electromagnetic heating method, microwave (or ultrasonic wave) heating means; The preferred biomass energy of fuel, natural gas, compressed natural gas, coal that the heating furnace heating is used.
Further, described hot fluid can add oil well and/or water injection well and/or/be heated to 110～200 ℃ with existing heating means behind the oil reservoir, to improve or to keep the hot fluid temperature, as using pit shaft electrical heating method, kelvin effect electrical heating method, shaft bottom electrical heating method, pit shaft or shaft bottom electromagnetic heating method, pit shaft or shaft bottom microwave (or ultrasonic wave) heating means.
Further, in order to keep described chemical agent adding oil well and/or water injection well or/and be in a liquid state during oil reservoir, described chemical agent can be with existing heating means heating, to improve or maintenance chemical agent temperature and flowability thereof before or after adding oil well and/or water injection well; Described chemical agent should meet the countries concerned's standard, industry standard, company standard requirement when heating with existing heating means, can enough existing methods determine concrete heating means as those of ordinary skills.
Further, in order to guarantee in oil reservoir, to add chemical agent and hot fluid smoothly, carry out operation preliminary preparations such as well-flushing, drifting, replacing tubing string, maintenance earlier, in oil reservoir, add chemical agent and hot fluid again;
Described well-flushing refers to: water or hot fluid clean, replace oil well or/and the comprehensive work of crude oil in the injection well tubing, sleeve pipe, belong to the oil field recover the oil produce in maturation process method or action commonly used;
Described drifting refers to: dredge oil well or/and arbitrary or comprehensive work such as water injection well sleeve pipe, oil pipe belong to maturation process method or action commonly used in the oil recovery production of oil field with drift size gauge tool;
Described replacing tubing string refers to: change oil well or/and arbitrary or comprehensive work such as the oil pipe of water injection well, sucker rod, oil well pump, downhole tool belong to maturation process method or action commonly used in the oil recovery production of oil field;
Described maintenance refers to: to oil well or/and the arbitrary or comprehensive work that water injection well, oil pumper and wellsite facility thereof, flow process, facility carry out, belong to the oil field recover the oil produce in maturation process method or action commonly used;
Described operation preliminary preparation should be able to guarantee to add chemical agent and hot fluid smoothly in oil reservoir, and meets the regulation requirement of the countries concerned's standard, industry standard, company standard.For reaching aforementioned purpose, can determine the particular content of described operation preliminary preparation, concrete technical scheme as those of ordinary skills with existing method.
Further, increase the crude oil filtrational resistance in order to prevent described hot fluid from causing the clay swell in the oil reservoir, described hot fluid also can contain expansion-resisting agent;
Described expansion-resisting agent should be able to effectively prevent the clay swell that hot fluid causes in oil reservoir.For reaching aforementioned purpose, can utilize existing method to determine the concrete composition of described expansion-resisting agent, concrete type of merchandize as those of ordinary skills, and can determine minimum content, the maximum level of described expansion-resisting agent in hot fluid.
Further, in order to improve heat energy that described hot fluid contains and the temperature in oil reservoir thereof, reduce the heat waste before hot fluid enters oil reservoir, the wax crystalline substance in more effective fusing (or dissolving) oil reservoir, described hot fluid also can contain the heat energy releasing agent that thermal chemical reaction can take place;
Described heat energy releasing agent refers to: nitrite is or/and any one or two or more mixture of mixing in nitrate and ammonium chloride, urea, ammonium carbonate, the carbonic hydroammonium.
Described heat energy releasing agent can take place gentle in described hot fluid and effectively exothermic reaction, release heat, can effectively improve the heat energy that described hot fluid contains and the temperature that enters oil reservoir thereof, and guarantee that itself and hot fluid meet the countries concerned's standard, industry standard, company standard regulation in using adding oil reservoir.For reaching aforementioned purpose, utilize existing method can determine the concrete component of described heat energy releasing agent and the mutual proportioning composition between component as those of ordinary skills, can determine minimum content, the maximum level of heat energy releasing agent in hot fluid, and can determine that described heat energy releasing agent adds minimum addition, the maximum adding quantity in the oil reservoir.
Described nitrite and/or the nitrate maximum level in hot fluid can not surpass 5%, and the nitrite and/or the pure product maximum adding quantity of nitrate that are added in the oil reservoir can not be above 10 tons.For reaching aforementioned target, can enough existing methods determine to contain nitrite and/or nitrate at maximum level, the minimum content of hot fluid as those of ordinary skills, and can determine that nitrite and/or nitrate add maximum adding quantity, the minimum addition in the oil reservoir;
Open source information shows: the ammonium nilrite crystal in the nitrite reacts quickening when being heated, and can explode in time more than 60 ℃; Ammonium nitrate can resolve into ammonium nilrite more than 110 ℃; Therefore, ammonium nilrite, the aqueous ammonium nitrate solution of concentration more than 10% has danger, it added in the oil reservoir can violate the standard code of relevant oilfield enterprise and requirement, do not belong to inert gas releasing agent category of the present invention.
Further, for more effective raising formation pressure, described hot fluid also can contain the inert gas releasing agent;
Described inert gas releasing agent refers to: the mixture a kind of or that two or more arbitrary proportion is mixed between them of urea, ammonium carbonate, carbonic hydroammonium, ammonium nitrate or ammonium nilrite;
Described inert gas releasing agent should be able to be under 200 ℃ hot environment or oil reservoir in gentle pyrolysis takes place, discharge inert gas, and in the application that adds oil reservoir, meet regulation and the requirement of the countries concerned's standard, industry standard, company standard.For reaching aforementioned target, determine the concrete composition of described inert gas releasing agent as the enough existing methods of those of ordinary skills' energy, can determine Cmin, the Cmax of described inert gas releasing agent in hot fluid, and can determine that described inert gas releasing agent adds minimum addition, the maximum adding quantity in the oil reservoir;
Described ammonium nilrite and/or the ammonium nitrate maximum level in hot fluid can not surpass 5%, and the ammonium nilrite and/or the pure product maximum adding quantity of ammonium nitrate that are added in the oil reservoir can not be above 10 tons.For reaching aforementioned target, can enough existing methods determine to contain ammonium nilrite and/or ammonium nitrate at maximum level, the minimum content of hot fluid as those of ordinary skills, and can determine that ammonium nilrite and/or ammonium nitrate add maximum adding quantity, the minimum addition in the oil reservoir;
Open source information shows: the ammonium nilrite crystal reacts quickening when being heated, and can explode in time more than 60 ℃; Ammonium nitrate can resolve into ammonium nilrite more than 110 ℃; Therefore, ammonium nilrite, the aqueous ammonium nitrate solution of concentration more than 10% has danger, it added in the oil reservoir can violate the standard code of relevant oilfield enterprise and requirement, do not belong to inert gas releasing agent category of the present invention.
Further, for reduce described hot fluid in oil reservoir and crude oil, rock, sand grains between interfacial tension, described hot fluid also can contain surfactant (or surfactant liquids);
Described surfactant should be able to effectively reduce the interfacial tension between hot fluid and crude oil, rock, sand grains, should guarantee that it does not produce the adverse chemical reaction with described chemical agent, and guarantee to meet in the application that the described hot fluid that contains surfactant adds to oil reservoir the regulation requirement of the countries concerned's standard, industry standard, company standard.For reaching aforementioned target, can determine concrete composition, the particular type of described surfactant as those of ordinary skills with existing method, and can determine minimum content, the maximum level of described surfactant in hot fluid;
Open source information shows: meet adverse chemicals such as can the producing precipitation reaction of anion surfactant and cationic surfactant, if described chemical agent contains anion surfactant, described surfactant and the hot fluid that contains this surfactant just can not contain cationic surfactant, and vice versa.
Further, for wax precipitation temperature, the viscosity of more effective reduction crude oil, described chemical agent and/or hot fluid also can contain concentration and be no more than 5% peroxide.
Described peroxide refers to: any one of performic acid, cumyl peroxide, dibenzoyl peroxide, methyl ethyl ketone peroxide, peroxidized t-butyl perbenzoate, cyclohexanone peroxide, tertbutanol peroxide, cumyl hydroperoxide, hydrogen peroxide, sodium peroxide, carbamide peroxide, sodium peroxydisulfate or SODIUM PERCARBONATE or the mixture of two or more arbitrary proportion arbitrarily.
When described chemical agent contains peroxide, can not contain high molecular surfactant and polymer.
Described peroxide should be able to decomposite free oxygen in oil reservoir maybe can destroy the structure that asphaltene molecules, wax molecule carbon chain maybe can destroy asphalitine phase, wax crystalline substance, should add theory of evolution agent and/or hot fluid and add the regulation requirement that should meet the countries concerned's standard, industry standard, company standard in the application of oil reservoir.For reaching aforementioned purpose, can determine with existing method whether described peroxide can or allow to add in described chemical agent and/or the hot fluid as those of ordinary skills, can determine the concrete composition of described peroxide and in described chemical agent and/or hot fluid minimum content, maximum level, and can determine that described peroxide adds minimum, the peak discharge in the oil reservoir.
Open source information shows: described peroxide has strong oxidisability, can effectively break the structure of asphalitine phase, wax crystalline substance, can be reacted by the micro heavy ionic catalysis in the oil reservoir; Therefore, the peroxide aqueous solution of concentration more than 5% has danger, it added in the oil reservoir can violate the standard code of relevant oilfield enterprise and requirement.
Laboratory test shows: the peroxide aqueous solution of content 2% is added in 35 blocks of crude oil in meditation, can will hang down 1 ℃ of this crude oil wax precipitation temperature, and can reduce its viscosity more than 10%.
The present invention has following beneficial effect: the present invention can effectively solve the analyse wax problem of crude oil in oil reservoir, can effectively exploit wax precipitation oil reservoir, significantly reduce the wax precipitation oil reservoir cost of winning, prolong the oil well production cycle, increase oil well output, improve the oil reservoir ultimate recovery, and implement easily, safe and reliable, remarkable in economical benefits.
The specific embodiment
Embodiment 1
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: add chemical agent and hot fluid in oil reservoir, they have melted the wax crystalline substance in the oil reservoir, have reduced the wax precipitation temperature of crude oil in the oil reservoir simultaneously, make the smooth seepage flow of crude oil in the oil reservoir to oil well, then crude oil is promoted to ground from oil well.
Described chemical agent is mixed methylnaphthalene; Described hot fluid is 95～100 ℃ of oilfield sewages.
Using the present invention with Jing35-31-41Jing is example:
The open source information of Liaohe Oil Field shows: Jing35-31-41Jing belongs to quiet 35 east oil wells, be constructed and put into operation on May 16th, 1994, because of low, the moisture high closing well of production fluid amount, again drive a well in October, 2006, day production fluid 1-2 ton per day, moisture 100%, accumulative total is produced water l90 ton, in June, 2007, cause oil reservoir feed flow deficiency always can't ordinary production, the Batch Process method that employing drove a well every 2 days and recovered the oil 12 hours, average day production fluid 0.7 ton per day, average day produce oil 0.4 ton per day, totally recover the oil about 100 tons about 400 tons of production fluids in by the end of June, 2007 to;
Producing analysis and relevant calculation shows: during this well opening well and making production, temperature of oil reservoir has been lower than wax precipitation temperature around it, in oil reservoir, analysed wax, the wax crystalline substance of analysing has seriously stopped up oil reservoir seepage flow hole, cause reservoir permeability significantly to reduce, the crude oil in the oil reservoir is difficult to smooth seepage flow to oil well, thereby causes oil reservoir feed flow deficiency, oil well can't ordinary production, can only adopt the Batch Process mode;
In order to improve the fluid supply capacity of oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow the oil well ordinary production, this well is used the present invention on June 27th, 2007 and has been carried out pilot production, its technical scheme is: earlier with high-pressure pump 20 tons of mixed methylnaphthalenes of squeeze note (being commonly called as anti-squeezing) in this casing earlier, and then in this casing 600 tons of 95～100 ℃ of oilfield sewages of squeeze note (being commonly called as anti-squeezing), utilizing this sewage that the mixed methylnaphthalene in the sleeve pipe is pushed in the oil reservoir and with it mixes in oil reservoir, utilize the wax crystalline substance in joint synergy fusing (or dissolving) oil reservoirs of mixed methylnaphthalene and 95～100 ℃ of oilfield sewages, reduce the wax precipitation temperature of crude oil in the oil reservoir, improve formation pressure simultaneously, in order to make the smooth seepage flow of crude oil in the oil reservoir to oil well.The crude oil that will enter in the oil well with this well and existing oil production method thereof is promoted to ground again;
Open source information shows: 20 ℃ of density of mixed methylnaphthalene are greater than water, so after adding it in oil well casing, the enough sewage of energy pushes it in oil reservoir;
Laboratory test and open source information show: the dewaxing temperature of this well crude oil sample is 55 ℃; Mixed methylnaphthalene can melt paraffin grade wax or candle at 40 ℃; In 40 ℃ of crude oil samples of this well, add 10% mixed methylnaphthalene, can reduce by 22 ℃ of the former oil freezing points of this well, reduce by 11 ℃ of its wax precipitation points, illustrate that 40 ℃ of following mixed methylnaphthalenes effectively melt the wax crystalline substance or dissolve; Hence one can see that: mixed methylnaphthalene can be down to 40 ℃ by 55 ℃ with the dewaxing temperature of this well oil sample, reduces by 15 ℃ of dewaxing temperature;
Relevant calculation shows: 600 tons of 95～100 ℃ of oilfield sewages are added in this well, can make the reservoir temperature in 10 meters of the radiuses around this well improve more than 4 ℃, it was remained on more than 45 ℃ in 48 hours, be higher than the temperature of mixed methylnaphthalene fusing (or dissolving) wax crystalline substance more than 5 ℃; Hence one can see that: 95～100 ℃ of oilfield sewages can melt the brilliant thermal condition of creating of (or dissolving) wax for mixed methylnaphthalene;
Therefore, mixed methylnaphthalene and 95～100 ℃ of oilfield sewage joint synergies can effectively reduce freezing point, the wax precipitation point of its crude oil with the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 10 meters of the radiuses around this well;
This well is used technical scheme of the present invention opening well and making production after 7 days, actual tests detects and shows: it is 160mPa.S that this well is produced 40 ℃ of viscosity of actual oil sample of initial stage, less than 50% of the described 50 ℃ of original viscosities of Liaohe Oil Field open source information, 50 ℃ of viscosity are 30mPa.S, less than 9% of the described 50 ℃ of original viscosities of Liaohe Oil Field open source information, wax precipitation temperature is 32 ℃, than 42 ℃ low 10 ℃ of the described quiet 35 eastern oil wax precipitation temperatures of Liaohe Oil Field open source information; 40 ℃ of viscosity of the actual oil sample of this well production in the time of 6 months are 280mPa.S, less than 78% of the described 50 ℃ of original viscosities of Liaohe Oil Field open source information, 50 ℃ of viscosity are 150mPa.S, less than 42% of the described 50 ℃ of original viscosities of Liaohe Oil Field open source information, wax precipitation temperature is 35 ℃, than 42 ℃ low 7 ℃ of the described quiet 35 eastern oil wax precipitation temperatures of Liaohe Oil Field open source information; 40 ℃ of viscosity of crude of the actual oil sample of this well production in the time of 12 months are 490mPa, 50 ℃ viscosity of crude is 260mPa.S, still less than 78% of the described 50 ℃ of original viscosities of Liaohe Oil Field open source information, wax precipitation temperature is 40 ℃, than 42 ℃ low 2 ℃ of the described quiet 35 eastern oil wax precipitation temperatures of Liaohe Oil Field open source information;
This mill trial results shows: after this well adopted technical scheme of the present invention, oil reservoir seepage flow fluid supply capacity was largely increased, and effect of increasing production is extremely remarkable, and surpassed 13 months effective time; Average production fluid amount increases to 6.2 ton per days by 0.7 ton/day before testing, and oil production increases to 1.9 ton per days by 0.4 preceding ton per day of test; Duration of test accumulative total is produced 750 tons of crude oil, and accumulative total has a net increase of produces 590 tons of crude oil; After 600 tons of water yields that the deduction test adds, on average have a net increase of liquid measure 5.5 ton per days, have a net increase of oil production 1.5 ton per days; Efficiently solved this well difficult problem of ordinary production continuously always since building up.
Open source information shows: acidifying, pressure break are the maturation process method, no matter are separately independently or unite and carry out, and can both effectively improve permeability, degree of porosity and the percolation ability of oil reservoir; And this production experiment has shown that chemical agent and hot fluid can effectively melt the wax crystalline substance in (or dissolving) oil reservoir, reduces the viscosity of crude in the oil reservoir; Therefore, earlier oil reservoir is carried out acidifying or/and pressure break adds chemical agent and hot fluid again in oil reservoir, the crude oil seepage flow in the oil reservoir is easier with making; Therefore, with acidifying or/and pressure break and chemical agent and hot fluid are united for the exploitation effect of wax precipitation oil reservoir can expect.
Open source information shows: there are numerous wax bacteriums that bite in nature, and isolatedly from the oily sludge of oil well well site efficiently bites the wax bacterium, can effectively consume the wax molecule; A large amount of experiments both at home and abroad show: microorganism can be stood the hot environment under the oil reservoir environment, can breed in oil reservoir, survive, and can generate biosurfactant, is at home and abroad applied in the non-wax precipitation oil reservoir production; Because biosurfactant belongs to one of described chemical agent category or its component; Because Institute of Micro-biology's role is in the former oil environment of oil reservoir; Therefore, as long as described hot fluid and chemical agent can not effectively suppress, killing microorganisms, no matter microbial liquid be according to its before chemical agent and hot fluid or after order add in the oil reservoir, its with described chemical agent and hot fluid use in conjunction the effect in the wax precipitation oil reservoir exploitation all can expect.
Embodiment 2
Repeat embodiment 1, its difference is, add chemical agent and hot fluid in oil reservoir before, has taked operation preliminary preparation steps such as well-flushing, drifting, replacing tubing string, maintenance earlier:
Using the present invention with Jing35-30-38Jing is example.
By this well data as can be known, its former oil freezing point is 50 ℃, and the crude oil that oil well stops production in its oil pipe of back, the sleeve pipe may solidify, thereby the technical scheme that causes adding chemical agent and hot fluid in the oil reservoir by oil well casing or oil pipe can't be implemented; Accordingly, can be after oil well stops production, with the oilfield sewage well-flushing more than 80 ℃, 80 ℃ of oilfield sewages are added in this casing, allow it from oil pipe, come out to enter in the surface technology flow process then, thereby with oilfield sewage the crude oil in oil well oil conduit, the sleeve pipe is replaced out, can allow the technical scheme smooth implementation that adds chemical agent and hot fluid by oil well casing or oil pipe in the oil reservoir;
Owing in this well oil pipe hollow rod and oil well pump are arranged, also has heating wire in the hollow stem, annular space may have packer between oil pipe and the sleeve pipe, therefore if add chemical agent by this well oil pipe in the oil reservoir and hot fluid can can't be implemented because of stopping of oil well pump standing valve, also can be because of can't high pressure sealing between sucker rod and the well head and can't implement; And if add chemical agent and hot fluid in the oil reservoir by this casing, may have packer to stop and can't implement because of annular space between oil pipe and the sleeve pipe; Accordingly, must solve corresponding problem by this operation preliminary preparation of described replacing tubing string, just can make the technical scheme that adds chemical agent and hot fluid in the oil reservoir be able to smooth implementation; Because of the operation preliminary preparation belong to the oil field recover the oil to produce in maturation process method commonly used, can expect fully and finish this operation preliminary preparation according to existing method as those of ordinary skills.
Embodiment 3
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: in order to prevent once in oil reservoir, adding chemical agent and the too big drawback of hot fluid total amount, in oil reservoir around chemical agent and the hot fluid adding oil well, allow chemical agent and hot fluid follow the crude oil seepage flow in the oil reservoir to be back to this oil well and to rise to ground by this oil well again, realize the oil well chemical agent of oil reservoir-hot fluid associating huff and puff oil recovery mode (or technology) on every side, pass through oil well, with existing method (as pumping) chemical agent and hot fluid are added in this oil well oil reservoir on every side, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make crude oil and chemical agent in the oil reservoir, the smooth seepage flow of hot fluid mixture is back to this oil well, rise to ground by this oil well again, to realize the oil well chemical agent of oil reservoir-hot fluid associating huff and puff oil recovery mode (or technology) on every side;
Described chemical agent-hot fluid associating huff and puff oil recovery mode (or technology) refers to: by oil well chemical agent and hot fluid are added in the oil reservoir, allow crude oil seepage flow in chemical agent, hot fluid and the oil reservoir be back to this oil well again and rise to the oil production method (or technology) on ground by this oil well; Will chemical agent and hot fluid add in the oil reservoir and be " the gulping down " that is commonly called as, allow crude oil seepage flow in chemical agent, hot fluid and the oil reservoir be back to this oil well and to rise to ground by this oil well and be " the telling " that is commonly called as;
By hydrodynamics as can be known: owing to there is very high pressure in the oil reservoir, chemical agent and hot fluid are added around the oil well behind the oil reservoir from oil well, can increase the pressure of oil reservoir around the oil well; If the pressure in the oil well is lower than formation pressure, the crude oil in the oil reservoir just can be to oil well seepage flow, and adding chemical agent in the oil reservoir and hot fluid also can seepage flow oil return well; And crude oil and chemical agent, hot fluid can mix by nature in the process of oil well seepage flow; Therefore, by oil well, with existing method (as pumping) chemical agent and hot fluid are added in this oil well oil reservoir on every side, can realize the oil well chemical agent of oil reservoir-hot fluid associating huff and puff oil recovery mode (or technology) on every side;
Using the present invention with the D3-X7 well is example:
Described chemical agent is: be dissolved in the chemical agent mixture of making in 50% mixed xylenes by 50% polyacrylate;
Described hot fluid is: 60～70 ℃ of clear water;
Open source information shows: the D3-X7 well belongs to Fu Laer base oil field, Fu Laer base oil field is positioned at the Qiqihaer City, 450 meters of average buried depths, the sixties have just been verified nearly 2,000 ten thousand tons oil in place, adopt steam oil production technology to carry out pilot development in decades but verify always, because the cost for oil production of this oil production technology has surpassed the economic worth of the crude oil that produces, causing this oil field to never have commercial development is worth, several starts and gets down from horse from verifying in decades, can't effectively be developed always;
The D3-X7 well belongs to Fu Laer base oil field production well, after building up in September, 2007, can not produce crude oil with common oil production method; Adopt steam oil production method, inject 1100 tons of 350 ℃ of high-temperature steams to oil reservoir, theoretical calculating shows needs to burn 66 tons of fuel oil for this reason, actual in 70 tons of fuel oil; The normal oil recovery produced 2 months after annotating vapour, 200 tons of accumulative total production fluid amounts, and 60 tons of accumulative total crude oil extractions, the crude oil that produces is not enough to offset steam injection and consumes burnt fuel oil; Therefore, without any economic worth, this well stops with the steam soak thermodynamic oil extraction process mode of production this well then with the steam soak thermal recovery technology, and closing well is idle;
Actual detected shows: reservoir temperature is 20 ℃ around this well, 20 ℃ of viscosity 11000mP.s of the crude oil sample that produces, 23 ℃ of wax precipitation temperatures; Therefore, reservoir temperature is lower than the crude oil wax precipitation temperature around this well, crude oil has been analysed wax in oil reservoir, the wax crystalline substance of analysing has seriously stopped up oil reservoir seepage flow hole, cause reservoir permeability significantly to reduce, crude oil in the oil reservoir is difficult to smooth seepage flow to oil well, thereby causes oil reservoir feed flow difficulty, and oil well can't ordinary production;
In order to solve this well feed flow difficult problem of oil reservoir on every side, make around this well the smooth seepage flow of crude oil in the oil reservoir to oil well, allow this oil well ordinary production, this well is used the present invention in January, 2008 and has been carried out pilot production, its technical scheme is: 50% polyacrylate is dissolved in makes the chemical agent mixture in 50% mixed xylenes earlier, again by this oil well casing, with high-pressure pump according to the 10-15 ton/hour flow 500 tons in 20 tons in chemical agent mixture and 60～70 ℃ of clear water are added in the oil reservoir around this well, be allowed to condition in the oil reservoir and mix naturally with crude oil, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make crude oil and chemical agent in the oil reservoir, the smooth seepage flow of the mixture of water is back to this oil well, is promoted to ground by this production well again;
Laboratory test shows: the dewaxing temperature of this well crude oil sample is 28 ℃; Described chemical agent mixture can melt paraffin grade wax or candle at 22 ℃; In 22 ℃ of crude oil samples of this well, add 10% described chemical agent mixture, can reduce by 10 ℃ of the former oil freezing points of this well, reduce by 8 ℃ of its wax precipitation points, illustrate 22 ℃ down described chemical agent mixture effectively melt (or dissolving) with wax is brilliant; Hence one can see that: described chemical agent mixture can be down to 22 ℃ by 28 ℃ with the dewaxing temperature of this well oil sample, reduces by 6 ℃ of dewaxing temperature;
Relevant calculation shows: 500 tons in 60～70 ℃ of clear water are added in this well, can make the reservoir temperature in 12 meters of the radiuses around this well improve more than 5 ℃, it was remained on more than 25 ℃ in 48 hours, be higher than the temperature of described chemical agent mixture melt (or dissolving) wax crystalline substance more than 3 ℃; Hence one can see that: 60～70 ℃ of clear water can be created thermal condition for described chemical agent mixture melt (or dissolving) wax is brilliant;
Therefore, described chemical agent mixture and 60～70 ℃ of clear water joint synergies can effectively reduce freezing point, the wax precipitation point of its crude oil with the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 12 meters of the radiuses around this well;
This well is used technical scheme of the present invention opening well and making production after 3 days, actual tests detects and shows: the 20 ℃ of viscosity of crude 150mP.s of actual oil sample when this well is produced 3 months, be 1.4% of this well crude oil original viscosity, wax precipitation temperature is 15 ℃, reduces by 8 ℃ than its original wax precipitation temperature.
This well was used after the technical scheme of the present invention ordinary production 6 months, added up 500 tons of production fluid amounts in by the end of July, 2008 to, 300 tons of accumulative total crude oil extractions, and economic benefit is extremely remarkable.
The practice of construction data of this well show: with high-pressure pump according to the 10-15 ton/hour flow when adding 500 tons in 20 tons in chemical agent mixture and 60～70 ℃ of clear water in this well oil reservoir on every side, its well head maximum pressure is 5-7MPa, even the head of liquid in the calculating in the oil well, the maximum pressure in this well oil reservoir can not reach 13MPa yet; And the open source information in Fu Laer base oil field shows: the fracture pressure of this down-hole oil reservoir is more than the 20MPa; Therefore, with high-pressure pump according to the 10-15 ton/hour flow when adding 500 tons in 20 tons in chemical agent mixture and 60～70 ℃ of clear water in this well oil reservoir on every side, can not press and wear this well oil reservoir, the crude oil pushing tow in the oil reservoir can not advanced in the non-oil reservoir.
The data of Fu Laer base oil field open source information and this well shows: D3-X7 well oil pipe-sleeve pipe annular space does not have packer, and the oil reservoir buried depth is less than 1000 meters; Calculating shows, hot fluid with the 10-15 ton/hour flow when adding in the oil reservoir temperature drop in this well annular space can not surpass 10 ℃, so this well can directly utilize sleeve pipe (actual be between sleeve pipe and the oil pipe annular space) that chemical agent and hot fluid are added in the oil reservoir; Because moving tubing string belongs to oil well operation category, expense is higher; Therefore, this well adopts the job practices of fixed tubular column, can reduce operating expenses, saves cost for oil production, remarkable in economical benefits.
Embodiment 4
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: for the chemical agent with the nonfluid shape adds in the oil reservoir, earlier the chemical agent of described nonfluid shape is made the liquid that temperature is less than or equal to the hot fluid temperature, and then in oil reservoir, add this liquid and hot fluid, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, with existing method crude oil is promoted to ground from oil well again.
Described chemical agent is the 2-methyl naphthalene; Described hot fluid is 95～100 ℃ of oilfield sewages.
Described chemical agent fluid temperature should be less than or equal to the hot fluid temperature and have good flowability under this temperature, can utilize existing method to determine the temperature of making of described liquid as those of ordinary skills, and can determine whether it needs insulation and insulation or tracing thermal-insulating technical scheme accordingly.
Using the present invention with Jing35-30-38Jing is example.
The open source information of Liaohe Oil Field shows: Jing35-30-38Jing belongs to quiet 35 western oil wells, be constructed and put into operation January nineteen ninety-five, day at initial stage production fluid 15 ton per days, day produce oil 13 ton per days, moisture 13%, in August, 2009, cause oil reservoir feed flow deficiency always can't ordinary production, on average day production fluid 0.5 ton per day, on average day produce oil 0.3 ton per day.
Producing analysis and relevant calculation shows: during this well opening well and making production, temperature of oil reservoir has been lower than wax precipitation temperature around it, in oil reservoir, analysed wax, the wax crystalline substance of analysing has seriously stopped up oil reservoir seepage flow hole, cause reservoir permeability significantly to reduce, crude oil in the oil reservoir is difficult to smooth seepage flow to oil well, thereby causes oil reservoir feed flow deficiency, and oil well can't ordinary production.
In order to improve the fluid supply capacity of oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow the oil well ordinary production, this well is used the present invention on August 24th, 2009 and carried out pilot production, and its technical scheme is: with the method that heats the 2-methyl naphthalene being heated to 40 ℃ earlier, to be molten into liquid 2-methyl naphthalene standby; Clean near the stratum of this well oil, sleeve pipe and its sleeve pipe of preheating for 50 tons with high-pressure pump and 95～100 ℃ of oilfield sewages then, the stratum is set up the thermal field that is not less than 38 ℃; Then with high-pressure pump simultaneously 100 tons of 20 tons of 2-methyl naphthalenes of squeeze note (being commonly called as anti-squeezing) and 95～100 ℃ of oilfield sewages in this casing, utilize this sewage of heat to keep the temperature of temperature in oil well casing of 2-methyl naphthalene to be higher than its freezing point, solidify in this casing to prevent the 2-methyl naphthalene; And then in this casing 500 tons of 95～100 ℃ of oilfield sewages of squeeze note (being commonly called as anti-squeezing), utilizing this sewage that the 2-methyl naphthalene in the sleeve pipe is pushed in the oil reservoir and with it mixes in oil reservoir, utilize the wax crystalline substance in joint synergy fusing (or dissolving) oil reservoirs of 2-methyl naphthalene and 95～100 ℃ of oilfield sewages, reduce the wax precipitation temperature of crude oil in the oil reservoir, improve formation pressure simultaneously, in order to make the smooth seepage flow of crude oil in the oil reservoir to oil well, the crude oil that will enter in the oil well with this well and existing oil production method thereof is promoted to ground again.
By open source information as can be known: 2-methyl naphthalene density is bigger than water, calculates to show that its density of 100 ℃ and 100 ℃ of oilfield sewage difference are very little; Owing to be a kind of Turbulence Flow state after oilfield sewage enters oil well casing, can in sleeve pipe, constantly mix with liquid 2-methyl naphthalene, therefore liquid 2-methyl naphthalene can be pushed in the oil reservoir with oilfield sewage.
Laboratory test and open source information show: the dewaxing temperature of this well crude oil sample is 60 ℃; The 2-methyl naphthalene can melt paraffin grade wax or candle at 50 ℃; In 50 ℃ of crude oil samples of this well, add 10% mixed methylnaphthalene, can reduce by 12 ℃ of the former oil freezing points of this well, reduce by 8 ℃ of its wax precipitation points, illustrate that 50 ℃ of following 2-methyl naphthalenes are with the brilliant effectively fusing (or dissolving) of wax; Hence one can see that: the 2-methyl naphthalene can be down to 50 ℃ by 60 ℃ with the dewaxing temperature of this well oil sample, reduces by 10 ℃ of dewaxing temperature.
Calculating shows: 600 tons of 95～100 ℃ of oilfield sewages are added in this well, can make the reservoir temperature in 7 meters of the radiuses around this well improve more than 2 ℃, it was remained on more than 56 ℃ in 48 hours, be higher than the temperature of 2-methyl naphthalene fusing (or dissolving) wax crystalline substance more than 6 ℃; Hence one can see that: 95～100 ℃ of oilfield sewages can be the brilliant thermal condition of creating of 2-methyl naphthalene fusing (or dissolving) wax.
Therefore, 2-methyl naphthalene and 95～100 ℃ of oilfield sewage joint synergies can effectively reduce freezing point, the wax precipitation point of its crude oil with the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 7 meters of the radiuses around this well.
This well is used technical scheme of the present invention opening well and making production after 3 days, actual tests detects and shows: it is 11mPa.S that this well is produced 50 ℃ of viscosity of actual oil sample of initial stage, less than 0.5% of its 50 ℃ of original viscosities, wax precipitation temperature is 40 ℃, than 54 ℃ of low l4 ℃ of the described quiet 35 Western crude wax precipitation temperatures of Liaohe Oil Field open source information; 50 ℃ of viscosity of the actual oil sample of this well production in the time of 4 months are 550mPa.S, and less than 14% of its 50 ℃ of original viscosities, wax precipitation temperature is 45 ℃, than 54 ℃ low 9 ℃ of the described quiet 35 eastern oil wax precipitation temperatures of Liaohe Oil Field open source information; 50 ℃ of viscosity of crude of the actual oil sample of this well production in the time of 8 months are 700mPa.S, still 18% of its 50 ℃ of original viscosities, and wax precipitation temperature is 50 ℃, than 54 ℃ low 4 ℃ of the described quiet 35 eastern oil wax precipitation temperatures of Liaohe Oil Field open source information.
This mill trial results shows: after this well adopted technical scheme of the present invention, oil reservoir seepage flow fluid supply capacity was largely increased, and effect of increasing production is extremely remarkable, and surpassed 8 months effective time; Average production fluid amount increases to 7 ton per days by 0.5 ton/day before testing, and oil production increases to 4.2 ton per days by 0.3 preceding ton per day of test; Duration of test accumulative total is produced 1020 tons of crude oil, and accumulative total has a net increase of produces about 750 tons of crude oil; After 600 tons of water yields that the deduction test adds, on average have a net increase of liquid measure 4.5 ton per days, have a net increase of oil production 3.9 ton per days; Efficiently solved this well difficult problem of ordinary production continuously always since building up.
Embodiment 5
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: come out in order to utilize the oil extraction that chemical agent-hot fluid associating huff and puff oil recovery mode (or technology) is controlled oil well in the oil reservoir, and then the purpose of wax precipitation oil reservoir is effectively exploited in realization, with existing method (as pumping) chemical agent is added in the oil well earlier, with existing method (as pumping) hot fluid is added in the oil well then, the chemical agent pushing tow is controlled the precalculated position of oil reservoir with hot fluid to this oil well, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make crude oil and chemical agent in the oil reservoir, the smooth seepage flow of hot fluid mixture is back to this oil well, rises to ground by this oil well again; Repeat these steps then, undertaken by these step cycle, come out with the oil extraction that oil well is controlled in the oil reservoir;
Described chemical agent-hot fluid associating huff and puff oil recovery mode (or technology) refers to: by oil well chemical agent and hot fluid are added in the oil reservoir, allow crude oil seepage flow in chemical agent, hot fluid and the oil reservoir be back to this oil well again and rise to the oil production method (or technology) on ground by this oil well; Will chemical agent and hot fluid add in the oil reservoir and be " the gulping down " that is commonly called as, allow crude oil seepage flow in chemical agent, hot fluid and the oil reservoir be back to this oil well and to rise to ground by this oil well and be " the telling " that is commonly called as;
Described oil well control oil reservoir: refer to centered by oil well, half be the oil reservoir in the radius with the oil well spacing, also refer to the oil reservoir controlled in the oil well design control range, the design of its concrete scope, index etc. is the maturation method that the oil field is used always; Described DX-7 well oil well control oil reservoir refers to apart from the oil reservoir in 50 meters scopes of well center;
Described precalculated position refers to: the oil reservoir position that predefined chemical agent, hot fluid should arrive, can also can handle volume as representing index with oil reservoir with the oil reservoir treatment radius as representing index; Described oil reservoir treatment radius refers to that with oil well bottom centre be the radius that round dot, chemical agent and hot fluid can arrive in oil reservoir; Described oil reservoir is handled volume and refer to the total reservoir volume that line, chemical agent and hot fluid can arrive centered by well center in oil reservoir;
Described crude oil and chemical agent, hot fluid mixture mix in oil reservoir naturally; Described crude oil and chemical agent, hot fluid can be in oil reservoir common seepage flow;
Described chemical agent, hot fluid all seepage flow are back to oil well, also can part seepage flow be back to oil well and in oil reservoir a residual part;
Described oil well spacing refers to: the designed distance between two mouthfuls of wells, belong to oilfield design term, and its establishing method, technical scheme are oil field maturation methods commonly used; Open source information shows: the oil well spacing in domestic oil field is generally 100-500 rice; Described Fu Laer base oil well spacing is 100 meters;
Open source information shows: the basic exploitation method of oil reservoir is to build oil well at oil reservoir, controls corresponding oil reservoir scope with oil well, by oil well the oil extraction in its control oil reservoir is come out then, belongs to ripe method at home; The construction of oil well also belongs to ripe method;
Open source information shows: oil well is communicated with oil reservoir, and the crude oil in the oil reservoir can enter oil well; Otherwise, fluid is added in the oil well, also can enter in the oil reservoir by oil well;
Open source information shows: oil well generally has oil pipe and sleeve pipe, and oil pipe has annular space between oil pipe and sleeve pipe in sleeve pipe, and oil pipe can be communicated with sleeve pipe and is communicating pipe, also can be with the packer sealing for not being communicated with;
Open source information shows: moving tubing string belongs to oil well operation category, and expense is higher, so fixed tubular column can reduce operating expenses, the saving cost for oil production;
Described chemical agent is the mixture of weight ratio 80% mixed xylenes, 10% methyl alcohol, 10% oil-soluble petroleum sodium sulfonate; Described hot fluid is 95～100 ℃ of clear water;
Described DX-7 well precalculated position is: using for the first time the oil reservoir treatment radius that the present invention carries out pilot production is 12 meters, and it is 900 cubic metres that oil reservoir is handled volume; Using for the second time the oil reservoir treatment radius that the present invention carries out pilot production is 17 meters, and it is 1800 cubic metres that oil reservoir is handled volume; Using the oil reservoir treatment radius that the present invention carries out pilot production for the third time is 21 meters,, it is 2800 cubic metres that oil reservoir is handled volume;
Using the present invention with the DX-7 well is example:
Open source information shows: the DX-7 well belongs to Fu Laer base oil field, Fu Laer base oil field is positioned at the Qiqihaer City, 450 meters of average buried depths, the sixties have just been verified nearly 2,000 ten thousand tons oil in place, adopt steam oil production technology to carry out pilot development in decades but verify always, because the cost for oil production of this oil production technology has surpassed the economic worth of the crude oil that produces, causing this oil field to never have commercial development is worth, several starts and gets down from horse from verifying in decades, can't effectively be developed always;
After this well builds up in September, 2007, can not produce crude oil with common oil production method; Adopt steam oil production method, inject 1100 tons of 350 ℃ of high-temperature steams to oil reservoir, theoretical calculating shows needs to burn 66 tons of fuel oil for this reason, actual in 70 tons of fuel oil; The normal oil recovery produced 2 months after annotating vapour, 300 tons of accumulative total production fluid amounts, and 47 tons of accumulative total crude oil extractions, the crude oil that produces is not enough to offset steam injection and consumes burnt fuel oil; Therefore, without any economic worth, this well stops with the steam soak thermodynamic oil extraction process mode of production this well then with the steam soak thermal recovery technology, and closing well is idle;
Actual detected shows: reservoir temperature is 20 ℃ around this well, 20 ℃ of viscosity 11000mP.s of the crude oil sample that produces, 23 ℃ of wax precipitation temperatures; Therefore, reservoir temperature is lower than the crude oil wax precipitation temperature around this well, crude oil has been analysed wax in oil reservoir, the wax crystalline substance of analysing has seriously stopped up oil reservoir seepage flow hole, cause reservoir permeability significantly to reduce, crude oil in the oil reservoir is difficult to smooth seepage flow to oil well, thereby causes oil reservoir feed flow difficulty, and oil well can't ordinary production;
In order to solve the feed flow difficult problem of oil reservoir that this well is controlled, make the smooth seepage flow of crude oil in this well control oil reservoir processed to oil well, allow this oil well ordinary production, this well is used the present invention for the first time in January, 2008 and has been carried out pilot production, its technical scheme is: earlier with 80% mixed xylenes, 10% methyl alcohol, 10% oil-soluble petroleum sodium sulfonate is mixed into the chemical agent mixture, use high-pressure pump 10 tons of these chemical agent mixtures of squeeze note (being commonly called as anti-squeezing) in this casing again, and then in this casing 500 tons in 95～100 ℃ of clear water of squeeze note (being commonly called as anti-squeezing), utilize this clear water with chemical agent mixture pushing tow in the sleeve pipe and that entered oil reservoir to apart from the precalculated position at 12 meters at this well center (namely centered by oil well, in the oil reservoir in 12 meters scopes of oil reservoir treatment radius), utilize the joint synergy of this chemical agent mixture and 95～100 ℃ of clear water to melt the wax crystalline substance (namely being equivalent to melt or dissolve 900 cubic metres of wax crystalline substances in the oil reservoir volume) in the oil reservoir in 12 meters scopes of (or dissolving) oil reservoir treatment radius, reduce the wax precipitation temperature of crude oil in the oil reservoir, improve formation pressure simultaneously, in order to make the smooth seepage flow of crude oil in the oil reservoir be back to this oil well, the crude oil that will enter in the oil well with this well and existing oil production method thereof is promoted to ground again;
Laboratory test shows: though little more a lot of than water by 80% mixed xylenes, 10% methyl alcohol, the composite chemical agent mixture of 10% oil-soluble petroleum sodium sulfonate density, can form more stable emulsion when mixing with water; Owing to be a kind of Turbulence Flow state after clear water enters oil well casing, can with this chemical agent mixture continuous mixing and emulsifying in sleeve pipe, although therefore the clear water temperature is higher, be unfavorable for emulsion stability, still this chemical agent mixture can be pushed in the oil reservoir with clear water;
Laboratory test shows: the dewaxing temperature of this well crude oil sample is 28 ℃; Described chemical agent mixture can melt paraffin grade wax or candle at 25 ℃; In 25 ℃ of crude oil samples of this well, add 10% described chemical agent mixture, can reduce by 10 ℃ of the former oil freezing points of this well, reduce by 8 ℃ of its wax precipitation points, illustrate 25 ℃ down described chemical agent mixture effectively melt (or dissolving) with wax is brilliant; Hence one can see that: described chemical agent mixture can be down to 25 ℃ by 28 ℃ with the dewaxing temperature of this well oil sample, reduces by 3 ℃ of dewaxing temperature;
Calculating shows: 500 tons in 95～100 ℃ of clear water are added in this well, can make the reservoir temperature in 12 meters of the radiuses around this well improve more than 8 ℃, it was remained on more than 25 ℃ in 48 hours, be higher than the temperature of described chemical agent mixture melt (or dissolving) wax crystalline substance more than 3 ℃; Hence one can see that: 95～100 ℃ of clear water can be created thermal condition for described chemical agent mixture melt (or dissolving) wax is brilliant;
Therefore, described chemical agent mixture and 95～100 ℃ of clear water joint synergies can effectively reduce freezing point, the wax precipitation point of its crude oil with the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 12 meters of the radiuses around this well;
This well is used technical scheme of the present invention opening well and making production after 3 days for the first time, actual tests detects and shows: the 20 ℃ of viscosity of crude 180mP.s of actual oil sample when this well is produced 3 months, be 1.6% of this well crude oil original viscosity, wax precipitation temperature is 16 ℃, reduces by 7 ℃ than its original wax precipitation temperature;
This well was used after the technical scheme of the present invention ordinary production 6 months for the first time, added up 600 tons of production fluid amounts in by the end of June, 2008 to, 360 tons of accumulative total crude oil extractions, and economic benefit is extremely remarkable;
Crude oil seepage flow difficulty because begin in June, 2008 in this well oil reservoir increases, the fluid supply capacity deficiency, this well production fluid amount is down to 0.5 ton per day, oil production is down to 0.3 ton per day, the oil well oil productive capacity is very low, repeated application the present invention for the second time carried out pilot production to this well on June 10th, 2008 for this reason, its technical scheme is with to use for the first time the technical scheme steps that the present invention carries out pilot production the same substantially, difference is that to use for the second time the concrete technical scheme data that the present invention carries out pilot production different, its technical scheme is: earlier with 80% mixed xylenes, 10% methyl alcohol, 10% oil-soluble petroleum sodium sulfonate is mixed into the chemical agent mixture, use high-pressure pump 10 tons of these chemical agent mixtures of squeeze note (being commonly called as anti-squeezing) in this casing again, and then in this casing 1000 tons in 95～100 ℃ of clear water of squeeze note (being commonly called as anti-squeezing), utilize this clear water with chemical agent mixture pushing tow in the sleeve pipe and that entered oil reservoir to apart from the precalculated position at 17 meters at this well center (namely centered by oil well, in the oil reservoir in 17 meters scopes of oil reservoir treatment radius), utilize the joint synergy of this chemical agent mixture and 95～100 ℃ of clear water to melt the wax crystalline substance (namely being equivalent to melt or dissolve 1800 cubic metres of wax crystalline substances in the oil reservoir volume) in the oil reservoir in 17 meters scopes of (or dissolving) oil reservoir treatment radius, reduce the wax precipitation temperature of crude oil in the oil reservoir, improve formation pressure simultaneously, in order to make the smooth seepage flow of crude oil in the oil reservoir be back to this oil well, the crude oil that will enter in the oil well with this well and existing oil production method thereof is promoted to ground again;
This well is used technical scheme of the present invention opening well and making production after 5 days for the second time, actual tests detects and shows: the 20 ℃ of viscosity of crude 150mP.s of actual oil sample when this well is produced 3 months, be 1.4% of this well crude oil original viscosity, wax precipitation temperature is 15 ℃, reduces by 8 ℃ than its original wax precipitation temperature;
This well was used after the technical scheme of the present invention ordinary production 7 months for the second time, added up 1300 tons of production fluid amounts in by the end of January, 2009 to, 500 tons of accumulative total crude oil extractions, and economic benefit is extremely remarkable;
Since in by the end of January, 2009 the crude oil seepage flow difficulty in this well oil reservoir increase, the fluid supply capacity deficiency, this well production fluid amount is down to 0.5 ton per day, oil production is down to 0.35 ton per day, the oil well oil productive capacity is very low, this well has carried out pilot production in repeated application the present invention for the third time on January 25 in 2009 for this reason, its technical scheme is with for the first time, it is the same substantially to use for the second time the technical scheme steps that the present invention carries out pilot production, difference is that to use the concrete technical scheme data that the present invention carries out pilot production for the third time different, its technical scheme is: earlier with 80% mixed xylenes, 10% methyl alcohol, 10% oil-soluble petroleum sodium sulfonate is mixed into the chemical agent mixture, use high-pressure pump 10 tons of these chemical agent mixtures of squeeze note (being commonly called as anti-squeezing) in this casing again, and then in this casing 1500 tons in 95～100 ℃ of clear water of squeeze note (being commonly called as anti-squeezing), utilize this clear water with chemical agent mixture pushing tow in the sleeve pipe and that entered oil reservoir to apart from the precalculated position at 21 meters at this well center (namely centered by oil well, in the oil reservoir in 21 meters scopes of oil reservoir treatment radius), utilize the joint synergy of this chemical agent mixture and 95～100 ℃ of clear water to melt the wax crystalline substance (namely being equivalent to melt or dissolve 2800 cubic metres of wax crystalline substances in the oil reservoir volume) in the oil reservoir in 21 meters scopes of (or dissolving) oil reservoir treatment radius, reduce the wax precipitation temperature of crude oil in the oil reservoir, improve formation pressure simultaneously, in order to make the smooth seepage flow of crude oil in the oil reservoir be back to this oil well, the crude oil that will enter in the oil well with this well and existing oil production method thereof is promoted to ground again;
This well is used technical scheme of the present invention opening well and making production after 5 days for the third time, actual tests detects and shows: the 20 ℃ of viscosity of crude 120mP.s of actual oil sample when this well is produced 3 months, be 1.1% of this well crude oil original viscosity, wax precipitation temperature is 14 ℃, reduces by 9 ℃ than its original wax precipitation temperature;
This well was used after the technical scheme of the present invention ordinary production 9 months for the third time, added up 1600 tons of production fluid amounts in by the end of September, 2009 to, 550 tons of accumulative total crude oil extractions, and economic benefit is extremely remarkable;
Since in by the end of September, 2009 the crude oil seepage flow difficulty in this well oil reservoir increase, the fluid supply capacity deficiency, this well production fluid amount is down to 0.5 ton per day, oil production is down to 0.2 ton per day, the oil well oil productive capacity is very low, the 4th repeated application the present invention carried out pilot production to this well August in 2009 for this reason, its technical scheme and first three time application class are seemingly, that is: when using technical solution of the present invention at every turn, the chemical agent mixture that adds in this well oil reservoir is 10 tons, 95～100 ℃ of clear water amounts that add then are to add in the oil reservoir on the basis of the water yield and increase more than 500 tons again last time using technical solution of the present invention, to prevent this well oil reservoir energy deficit.
So periodically use technical solution of the present invention repeatedly, chemical agent mixture and 95～100 ℃ of clear water periodically can be added in the DX-7 well control oil reservoir processed, oil extraction in this well control oil reservoir processed is come out, under this well or till the oil extraction in the oil reservoir of controlling (being the oil reservoir in the 50 meters scopes in distance B X-7 well center) finishes.
This mill trial results shows: after the DX-7 well is periodically used technical scheme of the present invention repeatedly, effectively solved the difficult problem that this well control oil reservoir nature processed seepage flow feed flow difficulty, oil well can't ordinary production, the effect that increases production and improves productivity is extremely remarkable, can make the residing Fu Laer base oil of this well field realize the crude oil economic worth of adopting greater than the commercial mining target of cost for oil production, make this oil field possess commercial development value and economic worth first.
Pilot production and the laboratory test of DX-7 well show: the joint synergy of chemical agent and hot fluid can effectively melt the wax crystalline substance in (or dissolving) this well oil reservoir; Since chemical agent and hot fluid regardless of in ground, oil well, whether mix, addition sequence, it all can mix after entering oil reservoir naturally; Because it is higher to add the temperature that the hot-fluid physical efficiency makes it enter oil reservoir from oil pipe in the oil reservoir; Therefore, chemical agent and hot fluid regardless of in ground, oil well, whether mix, addition sequence, how to add all can be from not influencing the effect of its joint synergy in essence; Therefore, among the present invention other as " earlier with chemical agent and its 1-10 hot fluid doubly on ground or/and mix the back in the oil well and add in the oil well with existing method (as pumping); with existing method (as pumping) hot fluid is added in the oil well then; the chemical agent pushing tow is controlled the precalculated position of oil reservoir with hot fluid to this oil well ", " use existing method (as pumping) to add in the oil well on ground or/and mix the back in the oil well chemical agent and hot fluid earlier; to enter into the precalculated position of this oil well control oil reservoir again by oil well ", " with existing method (as pumping) chemical agent is added in the oil well earlier; then with special gas with in the chemical agent pushing tow oil-feed layer; with existing method (as pumping) hot fluid is added in the oil well then; the chemical agent pushing tow is controlled the precalculated position of oil reservoir with hot fluid to this oil well ", " earlier with chemical agent and its 1-10 hot fluid doubly on ground or/and mix the back in the oil well and add in the oil well with existing method (as pumping); then with special gas with chemical agent; in the hot fluid mixture pushing tow oil-feed layer; with existing method (as pumping) hot fluid is added in the oil well then; the chemical agent pushing tow is controlled the precalculated position of oil reservoir with hot fluid to this oil well ", " by oil well oil conduit with existing method (as pumping) with chemical agent and hot fluid respectively or/and mix the precalculated position that the back adds oil well and then is pushed into oil well control oil reservoir ", " earlier in oil well casing, add special gas, then by oil well oil conduit with chemical agent and hot fluid respectively or/and mix the precalculated position that the back adds oil reservoir and then is pushed into oil well control oil reservoir " etc. the equal expectability of effect of method.
Embodiment 6
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: in order to utilize the more economical wax precipitation oil reservoir of exploiting effectively of chemical agent-hot fluid associating displacement of reservoir oil oil production method (or technology), improve the oil reservoir ultimate recovery, pass through centerwell, with existing method (as pumping) chemical agent and hot fluid are added in the oil reservoir, wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, and order about in the producing well of the smooth seepage flow of crude oil around the centerwell in the oil reservoir, allow crude oil from producing well, rise to ground again, so that the oil extraction in the oil reservoir is come out;
Enter the heat waste in oil well before the oil reservoir in order to reduce hot fluid, it is higher to guarantee that hot fluid enters the temperature of oil reservoir, add earlier nitrogen in the centerwell sleeve pipe and end to casing pressure 3.5～4MPa, by the centerwell oil pipe chemical agent and hot fluid are added in the oil reservoir then; In the described centerwell sleeve pipe nitrogen pressure be about to when being down to 2MPa reach pressure 3.5～4MPa again and end to wherein replenishing nitrogen to casing pressure, enter loss in the oil reservoir to replenish nitrogen;
Described centerwell refers to: the D5-2 water injection well, be used for chemical agent and hot fluid are added in the oil reservoir, and need not produce crude oil;
Described producing well: refer to D5-X3, D5-X5 oil well, be used for producing crude oil;
Described D5-2 water injection well enough is communicated with by oil reservoir with D5-X3, D5-X5 oil well;
Described chemical agent-hot fluid associating displacement of reservoir oil oil production method or technology: refer to add chemical agent and hot fluid from the D5-2 water injection well, the crude oil seepage flow that allows chemical agent, hot fluid order about in the oil reservoir rises to oil production method or the technology on ground to D5-X3, D5-X52 mouth oil well and by D5-X3, D5-X52 mouth oil well, and crude oil seepage flow to the producing well that allows chemical agent, hot fluid order about in the oil reservoir is " driving " that the oil field is commonly called as;
Described chemical agent and hot fluid continuously alternately add in the D5-2 water injection well always, enter oil reservoir after mixing in this well then;
Described D5-2 water injection well satisfies the chemical agent-hot fluid associating displacement of reservoir oil oil production method of centerwell adding-producing well extraction or the needs of technology, satisfies the needs of wax precipitation oil reservoir exploitation;
Described D5-X3, D5-X5 oil well satisfy the chemical agent-hot fluid associating displacement of reservoir oil oil production method of centerwell adding-producing well extraction or the needs of technology, satisfy the needs of wax precipitation oil reservoir exploitation;
Described chemical agent is the chemical agent mixture that is mixed by the water-soluble pour-point depressant of 20% commodity, 20% mixed methylnaphthalene, 20% tank oil dissolubility oil displacement agent, 20% commodity oil base paraffin remover, 20% liquid petroleum resin;
Described hot fluid is 70～80 ℃ of oilfield sewages;
Described 70～80 ℃ of oilfield sewages contain 0.5% commodity biosurfactant, can effectively reduce this oilfield sewage in oil reservoir and crude oil, rock, sand grains between interfacial tension;
Described D5-X3 well, D5-X5 well be in the position of D5-2 both sides symmetry, is 100 with the design oil well spacing of D5-2 well;
Open source information shows: recovery ratio, the ultimate recovery that water drive, chemical flooding, steam flooding, surfactant flooding, gas such as drive at the oil production method of various " driving " is higher than the oil production method of corresponding " handling up ", so the effect of chemical agent-hot fluid associating displacement of reservoir oil oil production method is better than chemical agent-hot fluid associating huff and puff oil recovery mode and can expects;
The production practices in Fu Laer base oil field show: the oil well produced chemical agent hot fluid associating displacement of reservoir oil oil production method of D5-2 water injection well adding-D5-X3, D5-X5 can be implemented in actual production and can expect;
Using the present invention as water injection well, D5-X3, D5-X5 as the well group of production well with D5-2 is example:
The D5-2 well belongs to Fu Laer base oil field, builds up in September, 2007.Because average 450 meters of Fu Laer base oil oil reservoir buried depth does not have associated gas, natural energy is low, and therefore original reservoir pressure can replenish stratum energy with water-filling method less than 5MPa.The former oil well that is designed to of this well, because not producing crude oil with common oil production method, in October, 2007 metaideophone (namely changing into water injection well) after building up, annotating the normal temperature face of land clear water amount day was 50 side/days, water injection pressure 8～10MPa, 9～10 ℃ of water filling temperature, effectively design water filling scope is the D5-2 well, the D5-X5 well, the oil reservoir scope that the D5-X3 well is controlled, the effective water filling of accumulative total added up to 3000 sides in 60 days, benefited producing well D5-X5 well, the equal water breakthrough of D5-X3 well, but do not have the crude oil output, show that this water injection method does not have actual beneficial effect, this well stops water filling in January, 2008 for this reason, and closing well is idle;
D5-X3 well, D5-X5 well all belong to Fu Laer base oil field, all build up in October, 2007, can not produce crude oil with common oil production method, adopt the steam soak thermal recovery technology without any economic worth, with do not obtain any notes behind water filling-oil recovery exploitation well group of 1 pair 2 of D5-2 well construction and adopt effect, this well stops then;
The analysis showed that: the D5-2 well is because carried out adding up in 60 days 3000 sides' water filling, and therefore the crude oil saturation ratio of adjacent to oil well area is rational as centerwell than D5-X3 well, D5-X5 well; Though and the equal water breakthrough of D5-X3 well, D5-X5 well, but there is not the crude oil output, show that oil reservoir crude oil between D5-X3 well, D5-X5 well and D5-2 well seriously analysed wax or solidified in oil reservoir, therefore the normal temperature surface water that injects from the D5-2 well crude oil that can't drive oil reservoir enters D5-X3 well, D5-X5 well and can only allow these 2 mouthfuls of well water outlets;
Oil extraction in the oil reservoir of this well group being controlled for chemical agent-hot fluid associating displacement of reservoir oil oil production method (or technology) is come out, and this well group is used the present invention in February, 2008～July and carried out pilot production.Its technical scheme is: at first, close D5-X3 well, D5-X5 well well head technology; Then, commodity temperature-sensitive packer is lowered in the oil pipe-sleeve pipe annular space at following 400 meters of D5-2 water injection well with existing method earlier, rise to sleeve pipe top with the hot fluid that stops the oil well bottom and cause the hot fluid heat waste, in this well annular space, inject 3000～5000 standard cubic meter nitrogen with the special-purpose nitrogen car in oil field again, allow its casing pressure reach 3.5～4MPa, with the heat waste of effective reduction hot fluid in oil well; Then, earlier inject 20 tons in the chemical agent mixture that mixed by the water-soluble pour-point depressant of 20% commodity, 20% mixed methylnaphthalene, 20% tank oil dissolubility oil displacement agent, 20% commodity oil base paraffin remover, 20% liquid petroleum resin in this well oil pipe with high-pressure pump, contain 500 tons of 70～75 ℃ of oilfield sewages of 0.5% commodity biosurfactant again with high-pressure pump in this well oil pipe with the flow injection of 30 ton per days; Then, constantly repeat in this well oil pipe, to inject 20 tons of chemical agent mixtures and 500 tons of steps that contain 70～75 ℃ of oilfield sewages of 0.5% commodity biosurfactant, and during special-purpose nitrogen car replenishes nitrogen in sleeve pipe when this casing pressure is down to 2MPa with the oil field, remain between 2～4MPa to guarantee the nitrogen pressure in this casing; Allow this chemical agent mixture and this oilfield sewage mix naturally to the oil reservoir between D5-X3 well, the D5-X5 well at the D5-2 well, wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, and order about the smooth seepage flow of crude oil in the oil reservoir to D5-X3 well, D5-X5 well; When the oil pipe of D5-X3 well, D5-X5 well or casing pressure rise to 0.5MPa by 0MPa, start the oil pumper of D5-X3 well, D5-X5 well, crude oil is promoted to ground.
Test shows: described chemical agent mixture and described oilfield sewage can be mixed into emulsion, although so 70-75 ℃ of stability that can influence emulsion of described oilfield sewage temperature, but because the two flowing in oil pipe is turbulent condition, thus its can be in D5-2 well oil pipe continuous mixing and emulsifying and entering in the oil reservoir;
Test shows: the dewaxing temperature of this well crude oil sample is 28 ℃; In 28 ℃ of these well crude oil samples, add 10% described chemical agent mixture, can reduce by 5 ℃ of its wax precipitation points, reduce its dewaxing temperature to 23 ℃;
Calculating shows: 500 tons of 70～75 ℃ of oilfield sewages are added in this well, the reservoir temperature in 10 meters of the radiuses around this well is improved more than 5 ℃, it was remained on more than 25 ℃ in 48 hours, be higher than the dewaxing temperature of this well crude oil sample more than 2 ℃; Hence one can see that: 70～75 ℃ oilfield sewage can melt the wax crystalline substance in (or dissolving) oil reservoir;
Because described chemical agent mixture, 70～75 ℃ of oilfield sewages constantly enter the D5-2 well to oil reservoir between D5-X3 well, the D5-X5 well by D5-2 well oil pipe, therefore chemical agent and all can pass through joint synergy with 70～80 ℃ oilfield sewage place of arrival, melt the wax crystalline substance of separating out in (or dissolving) oil reservoir, effectively reduce the wax precipitation point of its crude oil; After the crude oil in chemical agent and 70～75 ℃ of oilfield sewages and the oil reservoir arrived D5-X3 well, D5-X5 well from D5-2 well seepage flow, the wax crystalline substance that D5-2 well, D5-X3 well, D5-X5 well are controlled in the oil reservoir had namely all been melted;
This well was used technical scheme of the present invention after 11 days, D5-X3 well, D5-X5 well oil pressure increase to 0.5MPa by zero, start D5-X3 well, the production of D5-X5 well oil pumper for this reason, in the initial production 10 days, these 2 mouthfuls of wells add up to water yield per day 40 ton per days, produce to begin to see oil after 15 days; Produce 2 mouthfuls of wells total day produce oil 1 ton per days after 20 days, add up to day production fluid 25 ton per days; Produce 2 mouthfuls of wells total day produce oil 4 ton per days after 26 days, add up to production fluid 27 ton per days; Actual tests detects and shows: the 20 ℃ of viscosity of crude 210mP.s of actual oil sample when this well is produced 30 days are 2% of these well crude oil original viscosities, and wax precipitation temperature is 19 ℃, reduce by 4 ℃ than its original wax precipitation temperature;
These 3 mouthfuls of well groups have been used after the technical scheme of the present invention continuously ordinary production still can ordinary production after 12 months, adds up in by the end of November, 2008 to add 400 tons in chemical agent mixture to the D5-2 well to, adds 11000 tons of hot fluids; D5-X3 well, 2 mouthfuls of well accumulative totals of D5-X5 well add up to 13000 tons of production fluid amounts, 6000 tons of accumulative total crude oil extractions, and economic benefit is extremely remarkable.
Experiment in the present embodiment shows: by oil well oil conduit will chemical agent with existing method (as pumping) and hot fluid to add in the oil reservoir be feasible; Because it is method ripe in the field produces that prospect pit is converted to production well, therefore can expect in the effect of prospect pit application technical scheme of the present invention.
Experiment in the present embodiment shows: adopt the chemical agent-hot fluid associating displacement of reservoir oil oil production method (or technology) of 1 mouthful of centerwell, 2 mouthfuls of producing wells can exploit wax precipitation oil reservoir effectively, therefore adopt the current water injection well in domestic oil field at the center, it is that anti-5 or anti-9 arrangement applied chemistry agent-hot fluid associating displacement of reservoir oil oil production method (or technology) exploitation wax precipitation oil reservoir effect can be expected that 5 mouthfuls of oil wells or 9 mouthfuls of oil wells are arranged around the water injection well.
Experiment in the present embodiment shows: 70～75 ℃ of hot fluids can have been given play to good synergy with described chemical agent; Since hot fluid enter oil well and/or water injection well and/or/oil reservoir before used heating furnace heating, electrical heating method, electromagnetic heating method, microwave (or ultrasonic wave) heating means self be ripe, add oil well and/or water injection well and/or/oil reservoir after used pit shaft electrical heating method, kelvin effect electrical heating method, shaft bottom electrical heating method, pit shaft or shaft bottom electromagnetic heating method, pit shaft or shaft bottom microwave (or ultrasonic wave) heating means self also be ripe; Therefore, with described hot fluid add oil well and/or water injection well and/or/be heated to existing heating means before the oil reservoir 110～200 ℃ and adding oil well and/or water injection well and/or/be heated to 110～200 ℃ effect with existing heating means behind the oil reservoir all can expect.
Embodiment 7
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: earlier hot fluid is carried out scale control treatments or/and heat the back with existing method before heating, and then in oil reservoir, add chemical agent and hot fluid, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, with existing method crude oil is promoted to ground from oil well again.Handle earlier the hot fluid purpose and be in order to prevent that water chemistry in described hot fluid and the oil reservoir is incompatible and produce sediment obstruction oil reservoir hole, perhaps in order to prevent described hot fluid at oil well or/and serious fouling in the oil reservoir, perhaps in order to prevent the serious fouling in the heat temperature raising equipment installation of described hot fluid;
Described hot fluid carries out guaranteeing after the scale control treatments that it mixes with water in the oil reservoir can not produce sediment and stop up the oil reservoir space, can be in oil well, equipment, pipeline, middle oil reservoir not serious fouling, for reaching aforementioned purpose, those of ordinary skills can determine concrete technical scheme that hot fluid is handled.
Open source information shows: influenced by complex geological condition, water in the oil reservoir has belongs to sodium bicarbonate water type, what have belongs to calcium chloride water type, what have belongs to sulfate-sodium type, what have belongs to sodium acid carbonate-sodium carbonate water type, its salinity generally all more than 2000mg/L, have in addition up to more than the 100000mg/L; By chemical knowledge as can be known: if calcium chloride water type oilfield sewage is added in sulfate-sodium type or the sodium acid carbonate-sodium carbonate water type oil reservoir, just may produce calcium sulfate, precipitation of calcium carbonate; If calcium chloride water type oilfield sewage is added in the sodium bicarbonate water type oil reservoir, though can not produce sediment, but because bicarbonate radical reduces at pressure, temperature can be converted into carbanion when raising, can in pipeline, oil well, equipment, form incrustation scale with calcium ion;
Adding in the sulfate-sodium type oil reservoir with the oilfield sewage that 100 ℃ of calcium chloride water types or calcium ion content is very high as hot fluid is example;
Produce precipitation or fouling in order to prevent that calcium ion and sulfate ion from contacting to mix in oil reservoir, can be earlier handle calcium chloride water type or the very high oilfield sewage of calcium ion content with following technical scheme: in the very high oilfield sewage of calcium chloride water type or calcium ion content, add by NaOH, each 50% compound alkali or buck of making of sodium carbonate earlier, remove the calcium ion in this sewage, and then with hydrochloric acid the pH value of this sewage is adjusted to original value, be heated to 100 ℃ then; And then these 100 ℃ of sewage are added in the sulfate-sodium type oil reservoir as hot fluid;
Adding in the oil reservoir with the clear water that 100 ℃ of magnesium ions, iron ion content are very high as hot fluid is example.
In order to prevent that magnesium ion, ferrous ion from precipitating or fouling in firing equipment, pipeline, oil well, oil reservoir, can be earlier handle magnesium ion, clear water that ferrous ion content is very high with following technical scheme: earlier with existing aeration, manganese sand method for removing iron except the iron ion in anhydrating, in water, add by NaOH, each 50% compound alkali or buck of making of sodium carbonate again, remove the magnesium ion in this sewage, and then with hydrochloric acid the pH value of water is adjusted to original value, be heated to 100 ℃ then; And then these 100 ℃ of sewage are added in the oil reservoir as hot fluid.
Embodiment 8
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: be in a liquid state when adding oil well in order to keep described chemical agent, described chemical agent can be with existing heating means heating, to improve or maintenance chemical agent temperature and flowability thereof before or after the adding oil well; Should relevant meet national standard, industry standard, company standard requirement when described chemical agent heats with existing heating means, can enough existing methods determine concrete heating means as those of ordinary skills.
Be that fusion naphthalene liquid is example with described chemical agent.
Open source information shows: the fusing point of naphthalene is 80.5 ℃, do not solidify when guaranteeing that fusion naphthalene liquid adds oil well, have good flowability, can be by the following technical solutions: earlier fusion naphthalene liquid is added device heat with explosion-proof electricity and be heated to 100 ℃, add in the oil well together with 100 ℃ of water more than 1 times then.
Embodiment 9
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: enter the heat waste in oil well before the oil reservoir in order to reduce hot fluid and/or chemical agent, guarantee hot fluid, the temperature that chemical agent enters oil reservoir is higher, earlier in oil well casing, add nitrogen, natural gas, gaseous carbon dioxide, refinery gas, any one of flue gas or two or more mixture that mixes with arbitrary proportion arbitrarily, in oil reservoir, add chemical agent and hot fluid by oil well oil conduit then, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, with existing method crude oil is promoted to ground from oil well again.
Using the present invention with Jing35-31-31Jing is example:
The open source information of Liaohe Oil Field shows: Jing35-31-31Jing belongs to quiet 35 western oil wells, be constructed and put into operation July nineteen ninety-five, day at initial stage production fluid 28.5 ton per days, day produce oil 27.9 ton per days, moisture 2%, produce that production fluid amount, oil production glide rapidly after 1 month, an average day production fluid is down to 1.2 ton per days in by the end of August, 2009 to, and an average day produce oil is down to 0.2 ton per day, and the oil reservoir feed flow is obviously not enough, cause this well can't ordinary production
Producing analysis and relevant calculation shows: during this well opening well and making production, temperature of oil reservoir has been lower than wax precipitation temperature around it, in oil reservoir, analysed wax, the wax crystalline substance of analysing has seriously stopped up oil reservoir seepage flow space, cause reservoir permeability significantly to reduce, the crude oil in the oil reservoir is difficult to smooth seepage flow to oil well, thereby causes oil reservoir feed flow deficiency, the production fluid amount sharply glides, and oil well can't ordinary production.
In order to improve the fluid supply capacity of oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow the oil well ordinary production, this well is used the present invention on September 1st, 2009 and has been carried out pilot production, its technical scheme is: with existing method the oil well pump in this well, sucker rod are taken out earlier, with existing nitrogen car squeeze note (being commonly called as anti-squeezing) nitrogen 3000～5000 standard cubic meters in this casing, the air pressure to the sleeve pipe surpasses till the 3MPa; Use then high-pressure pump in this well oil pipe 20 tons of squeeze notes (being commonly called as just crowded) by 40% Span-20,20% fusel oil, 20% methyl alcohol, the chemical agent mixture that 20% biosurfactant transparent aqueous solution body mixes, 600 tons of 120～130 ℃ of oilfield sewages of squeeze note in this well oil pipe again, utilizing this sewage that the chemical agent mixture in the oil pipe is pushed in the oil reservoir and with it mixes in oil reservoir, utilize the wax crystalline substance in joint synergy fusing (or dissolving) oil reservoirs of chemical agent mixture and 110～120 ℃ of oilfield sewages, reduce the wax precipitation temperature of crude oil in the oil reservoir, improve formation pressure simultaneously, in order to make the smooth seepage flow of crude oil in the oil reservoir to oil well, the crude oil that will enter in the oil well with this well and existing oil production method thereof is promoted to ground again.
By open source information as can be known: Span-20 is emulsifier, and the biosurfactant transparent aqueous solution also has emulsification, and therefore described chemical agent mixture has the good emulsifying ability; Owing to be a kind of Turbulence Flow state after oilfield sewage enters oil well oil conduit, can in oil pipe, constantly mix with the chemical agent mixture, emulsification, although therefore this oilfield sewage temperature is up to 120～130 ℃, can influence the stability of emulsion, but still can described chemical agent mixture be pushed in the oil reservoir enough this oilfield sewages.
Laboratory test and open source information show: the dewaxing temperature of this well crude oil sample is 60 ℃, in 60 ℃ of crude oil samples of this well, add 10% described chemical agent mixture, can reduce by 8 ℃ of the former oil freezing points of this well, reduce by 5 ℃ of its wax precipitation points, illustrate that 60 ℃ of following described chemical agent mixtures are with the brilliant effectively fusing (or dissolving) of wax.
Calculating shows: 600 tons of 120～130 ℃ of oilfield sewages are passed through this well oil pipe add in oil reservoir, can make the reservoir temperature in 7 meters of the radiuses around this well improve more than 10 ℃, it was remained on more than 62 ℃ in 48 hours, be higher than the dewaxing temperature of this well crude oil sample more than 2 ℃; Hence one can see that: 120～130 ℃ of oilfield sewages can melt the wax crystalline substance in this well oil reservoir.
Therefore, described chemical agent mixture and 120～130 ℃ of oilfield sewage joint synergies can effectively reduce the wax precipitation point of its crude oil with the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 7 meters of the radiuses around this well.
This well is used technical scheme of the present invention opening well and making production after 5 days, and actual tests detects and shows: it is 50 ℃ that this well is produced actual oil sample wax precipitation temperature of initial stage, hangs down 4 ℃ for 54 ℃ than the described quiet 35 Western crude wax precipitation temperatures of Liaohe Oil Field open source information; The actual oil sample wax precipitation temperature of this well production in the time of 3 months is 52 ℃, than 54 ℃ low 2 ℃ of the described quiet 35 eastern oil wax precipitation temperatures of Liaohe Oil Field open source information; The actual oil sample wax precipitation temperature of this well production in the time of 6 months is 53 ℃, than 54 ℃ low 1 ℃ of the described quiet 35 eastern oil wax precipitation temperature of Liaohe Oil Field open source information.
This mill trial results shows: after this well adopted technical scheme of the present invention, oil reservoir seepage flow fluid supply capacity was largely increased, and effect of increasing production is extremely remarkable, and it is still effective to have surpassed 6 months effective time, estimated that its period of validity can reach more than 7 months; Average production fluid amount increases to 8.5 ton per days by 1.2 tons/day before testing, and average oil production increases to 1.6 ton per days by 0.2 ton per day before testing; Totally produced 290 tons of crude oil on March 5th, 2010, accumulative total has a net increase of produces about 240 tons of crude oil; To March 5 in 2010 daily fluid production rate still more than 3.5 ton per days, oil production is still at 0.9～1 ton per day, estimates that this pilot production can also produce crude oil more than 30 tons, can also have a net increase of crude oil more than 20 tons; After 600 tons of water yields that the deduction test adds, on average have a net increase of liquid measure 5.2 ton per days, have a net increase of oil production 1.4 ton per days; Efficiently solved this well difficult problem of ordinary production continuously always since building up.
Embodiment 10
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: for the residual crude oil in the oil reservoir around the water injection well being exploited out, earlier water injection well is converted to oil well, with the chemical agent described in the previous embodiment among the present invention 3-hot fluid associating huff and puff oil recovery mode (or technology) residual crude oil in the oil reservoir around the water injection well is exploited out then.
Open source information shows: the recovery ratio of wax precipitation oil reservoir is very low, with quiet 35 be example, its recovery ratio more than 15 years has only 3%, its projected ultimate recovery has only 10%, its Theoretical Calibration ultimate recovery is 20%; Therefore, no matter water injection well is converted by oil well still is newly-built, around still also have the residual crude oil of 80%-97% in the oil reservoir, can not cause the wasting of resources if exploit out; Since water injection well and oil well less than in line with difference, it is ripe method that water injection well is converted into oil well, so the effect of the residual crude oil in the oil reservoir can be expected around the chemical agent described in aforesaid embodiment 3, the embodiment 5 among water injection well application the present invention-hot fluid associating huff and puff oil recovery mode (or technology) exploitation water injection well.
Using the present invention with the D5-2 well is example.
Described chemical agent is weight ratio 10% mixed methylnaphthalene, the water-soluble thinner of 10% commodity, 10% tank oil dissolubility pour-point depressant, 10% contains the water-soluble commodity oil displacement agent of surfactant, 10% methyl naphthalene fusel oil liquid, 10% biodiesel, 10% oil-soluble petroleum sodium sulfonate and diethylene glycol butyl ether mixing material, 5% anthracene and aromatic solvent naphtha mixing material, 5% naphthols and liquid petroleum resin mixing material, 5% commodity wax-proofing agent, 5% pyridine is mixed into mixing material, again with 5% Petropols, 5% ethene and acrylate copolymer are dissolved in this mixing material and make the chemical agent mixture; Described hot fluid is 45～55 ℃ of clear water;
The D5-2 well belongs to Fu Laer base oil field, builds up in September, 2007.Because average 450 meters of Fu Laer base oil oil reservoir buried depth does not have associated gas, natural energy is low, can replenish stratum energy with water-filling method.The former production well that is designed to of this well, because not producing crude oil with common oil production method, in October, 2007 metaideophone (namely changing into water injection well) after building up, it was 50 side/days that day is annotated face of land clear water amount, water injection pressure 8～10MPa, 9～10 ℃ of water filling temperature, effectively design water filling scope is the D5-2 well, the D5-X5 well, the oil reservoir scope that the D5-X3 well is controlled, the effective water filling of accumulative total added up to 3000 sides in 60 days, JingD5-X5Jing is benefited, the equal water breakthrough of D5-X3 well, but do not have the crude oil output, show that this water injection method does not have actual beneficial effect, this well stops water filling in January, 2008 for this reason, and closing well is idle;
Actual detected with the analysis showed that: reservoir temperature is 20 ℃ around this well, 20 ℃ of viscosity 11000mP.s of the crude oil sample that produces, 23 ℃ of wax precipitation temperatures; Therefore, reservoir temperature is lower than the crude oil wax precipitation temperature around this well, and crude oil has been analysed wax in oil reservoir; Because the water that injects is surface water, 9～10 ℃ of water temperatures than low 13 ℃ of crude oil wax precipitation temperature, must further increase the weight of oil reservoir crude oil and analyse wax; The wax crystalline substance of separating out has seriously stopped up oil reservoir seepage flow hole, causes that reservoir permeability significantly reduces, the viscosity of crude in the oil reservoir significantly increases, so institute's water filling is difficult to effectively drive the smooth seepage flow of crude oil in the oil reservoir to oil well and extraction; Therefore, although this well accumulative total water filling 3000 sides, the crude oil around this well in the oil reservoir is not effectively driven away by water;
For the residual crude oil in the oil reservoir around this well is exploited out, this well is used the present invention in February, 2008 and has been carried out pilot production, its technical scheme is: the requirement according to oil pumper production crude oil earlier is transformed into oil well with the D5-2 water injection well, then with 10% mixed methylnaphthalene, the water-soluble thinner of 10% commodity, 10% tank oil dissolubility pour-point depressant, 10% contains the water-soluble commodity oil displacement agent of surfactant, 10% methyl naphthalene fusel oil liquid, 10% biodiesel, 10% oil-soluble petroleum sodium sulfonate and diethylene glycol butyl ether mixing material, 5% anthracene and aromatic solvent naphtha mixing material, 5% naphthols and liquid petroleum resin mixing material, 5% commodity wax-proofing agent, 5% pyridine is mixed into mixing material, again with 5% Petropols, 5% ethene and acrylate copolymer are dissolved in this mixing material and make the chemical agent mixture, and then by this water injection well sleeve pipe, with high-pressure pump according to the 10-15 ton/hour flow 500 tons in 20 tons in chemical agent mixture and 45～55 ℃ of clear water are added in the oil reservoir around this water injection well, be allowed to condition in the oil reservoir and mix naturally with crude oil, with the wax product in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make crude oil and chemical agent in the oil reservoir, the smooth seepage flow of the mixture of water is back to this water injection well, rises to ground by this production well again;
Test shows: the dewaxing temperature of oil reservoir crude oil sample is 28 ℃ under this well; Described chemical agent mixture can melt paraffin grade wax or candle at 22 ℃; Under this well of 22 ℃, add 10% described chemical agent mixture in the oil reservoir crude oil sample, can reduce by 10 ℃ of the former oil freezing points of this well, reduce by 8 ℃ of its wax precipitation points, illustrate 22 ℃ down described chemical agent mixture effectively melt (or dissolving) with wax is brilliant; Hence one can see that: described chemical agent mixture can be down to 22 ℃ by 28 ℃ with the dewaxing temperature of oil reservoir crude oil oil sample under this well, reduces by 8 ℃ of dewaxing temperature;
Calculating shows: 500 tons in 45～55 ℃ of clear water are added in this well, can make the reservoir temperature in 10 meters of the radiuses around this well improve more than 3 ℃, it was remained on more than 23 ℃ in 48 hours, be higher than the temperature of described chemical agent mixture melt (or dissolving) wax crystalline substance more than 1 ℃; Hence one can see that: 45～55 ℃ of clear water can be created thermal condition for described chemical agent mixture melt (or dissolving) wax is brilliant;
Therefore, described chemical agent mixture and 45～55 ℃ of clear water joint synergies can effectively reduce freezing point, the wax precipitation point of its crude oil with the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 10 meters of the radiuses around this well;
This well use technical scheme of the present invention after 3 days opening well and making production gone out crude oil, actual tests detects and shows: the 20 ℃ of viscosity of crude 150mP.s of actual oil sample when this well is produced 3 months, it is 1.4% of this well crude oil original viscosity, wax precipitation temperature is 18 ℃, reduces by 5 ℃ than the original wax precipitation temperature of oil reservoir crude oil under it;
This well was used after the technical scheme of the present invention ordinary production 6 months, added up 470 tons of production fluid amounts in by the end of July, 2008 to, and 230 tons of accumulative total crude oil extractions make that the residual crude oil in the oil reservoir has obtained effective exploitation around the water injection well, and economic benefit is extremely remarkable.
The production practices in open source information and oil field show: can change mutually between water injection well and the oil well; So the method water injection well that oil well can be used can be used equally; Therefore, described in the present invention other is as " by water injection well with existing method (as pumping) with chemical agent and hot fluid respectively or/and mix the back and add in the oil reservoir ", " overlapping effective existing method (as pumping) by water injection well adds chemical agent and hot fluid in the oil reservoir ", " chemical agent and hot fluid are added in the oil reservoir with existing method (as pumping) by injection well tubing ", " in the water injection well sleeve pipe, add special gas earlier; in oil reservoir, add chemical agent and hot fluid by injection well tubing then ", " pass through water injection well; periodically in oil reservoir, add chemical agent and hot fluid ", the effect of methods such as " for the oil extraction that water injection well is controlled in the oil reservoir is come out; and then realize the effectively purpose of exploitation wax precipitation oil reservoir; earlier water injection well is converted to oil well, uniting the oil extraction that huff and puff oil recovery mode (or technology) controls water injection well in the oil reservoir with aforementioned chemical agent among the present invention-hot fluid then and come out " all can be expected.
Embodiment 11
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: increase the crude oil filtrational resistance in order to prevent hot fluid from causing the clay swell in the oil reservoir, in oil reservoir, add chemical agent, expansion-resisting agent and hot fluid, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, reduce hot fluid and add the clay swell that causes in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, with existing method crude oil is promoted to ground from oil well again.
Described chemical agent is the 1-methyl naphthalene of weight ratio 25%, the emulsion that 20% 0# diesel oil, 2% chlorination dodecylbenzyl Dimethyl Ammonium, 3% polyoxyethylated alkyl alcohol, 50% clear water mixing and emulsifying form; Described hot fluid is 75～80 ℃ of oilfield sewages; Described expansion-resisting agent is that weight ratio 30% potassium chloride is dissolved in the aqueous solution of making in 70% water;
Described expansion-resisting agent is the aqueous solution that contains 20% potassium chloride, 5% ammonium chloride, 1% aluminium polychloride, 1% chlorination dodecyl ammonium.
Using the present invention with quiet 35-30-132 is example:
The open source information of Liaohe Oil Field shows: Jing35-30-132Jing belongs to quiet 35 western oil wells, be constructed and put into operation in April, 2008, day at initial stage production fluid 6.6 ton per days, day produce oil 3.1 ton per days, moisture 53%, produce that production fluid amount, oil production glide rapidly after 1 month, close a well in because of production fluid not on July 20th, 2009,1031 tons of accumulative total production fluids, 539 tons of produce oils;
Producing analysis and relevant calculation shows: during this well opening well and making production, temperature of oil reservoir has been lower than wax precipitation temperature around it, in oil reservoir, analysed wax, the wax crystalline substance of analysing has seriously stopped up oil reservoir seepage flow space, cause reservoir permeability significantly to reduce, crude oil in the oil reservoir is difficult to smooth seepage flow to oil well, thereby causes the oil reservoir can't feed flow, and oil well can't be produced; This well just residing quiet 35 blocks of western oil reservoirs is argillaceous agglutination, clay mineral content 7.7%, isogonic is strong in water-sensitive, the quick property of salt, if therefore in this oil reservoir, inject secondary waters in a large number, can cause the swelling clay mineral (being so-called water-sensitive) in the oil reservoir, further reduce reservoir permeability, increase crude oil seepage flow to the resistance of oil well.
In order to prevent that hot fluid from causing the clay swell in the oil reservoir, improve the fluid supply capacity of oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow the oil well ordinary production, this well is used the present invention on August 20th, 2009 and has been carried out pilot production, its technical scheme is: earlier with 20% potassium chloride, 8% ammonium chloride, 1% aluminium polychloride, 1% chlorination dodecyl ammonium is dissolved in that to make expansion-resisting agent in 70% water standby, again with 25% 1-methyl naphthalene, 20% 0# diesel oil, 2% chlorination dodecylbenzyl Dimethyl Ammonium, 3% polyoxyethylated alkyl alcohol, 50% clear water mixing and emulsifying becomes chemical agent standby; Then with the first 20 tons of expansion-resisting agents of squeeze note (being commonly called as anti-squeezing) in this casing of high-pressure pump, 40 tons of chemical agents of squeeze note in this casing utilize this chemical agent that expansion-resisting agent is pushed in the oil reservoir again; Then, use high-pressure pump 600 tons of 75～80 ℃ of oilfield sewages of squeeze note in this casing again, utilize this sewage that the chemical agent in the sleeve pipe is pushed in the oil reservoir and with chemical agent, expansion-resisting agent and in oil reservoir, mix; Utilize expansion-resisting agent to reduce the clay swell that oilfield sewage causes in oil reservoir, utilize the wax crystalline substance in joint synergy fusing (or dissolving) oil reservoir of chemical agent and this oilfield sewage, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, reduce oilfield sewage and add the clay swell that causes in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, with existing method crude oil is promoted to ground from oil well again;
Laboratory test shows: contain the density of 20% potassium chloride, 5% ammonium chloride, 1% aluminium polychloride, 1% chlorination dodecyl aqueous ammonium greater than being set forth in chemical agent, therefore can expansion-resisting agent be pushed in the oil reservoir enough described chemical agents;
Test shows: 20 ℃ of density of described chemical agent and oilfield sewage are more or less the same; Owing to be a kind of Turbulence Flow state after oilfield sewage enters oil well oil conduit, can in oil pipe, constantly mix with described chemical agent, emulsification, although therefore this oilfield sewage temperature is up to 75～80 ℃, can influence the stability of emulsion, but still can described chemical agent be pushed in the oil reservoir enough this oilfield sewages;
Laboratory test and open source information show: the dewaxing temperature of this well crude oil sample is 60 ℃; Described chemical agent can melt paraffin grade wax or candle at 50 ℃; In 50 ℃ of crude oil samples of this well, add 10% described chemical agent, can reduce by 6 ℃ of the former oil freezing points of this well, reduce by 4 ℃ of its wax precipitation points, illustrate 50 ℃ down described chemical agent effectively melt (or dissolving) with wax is brilliant; Hence one can see that: described chemical agent can be down to 50 ℃ by 60 ℃ with the dewaxing temperature of this well oil sample, reduces by 10 ℃ of dewaxing temperature.
Relevant calculation shows: 600 tons of 75～80 ℃ of oilfield sewages are passed through this well oil pipe add in oil reservoir, can make the reservoir temperature in 7 meters of the radiuses around this well improve more than 3 ℃, it was remained on more than 55 ℃ in 48 hours, be higher than the brilliant temperature of this well crude oil wax of described chemical agent fusing (or dissolving) more than 5 ℃; Hence one can see that: 75～80 ℃ of oilfield sewages can be the brilliant thermal condition of creating of described chemical agent fusing (or dissolving) wax;
Therefore, described chemical agent mixture and 75～80 ℃ of oilfield sewage joint synergies can effectively reduce the wax precipitation point of its crude oil with the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 7 meters of the radiuses around this well;
This well is used technical scheme of the present invention opening well and making production after 5 days, and actual tests detects and shows: it is 49 ℃ that this well is produced actual oil sample wax precipitation temperature of initial stage, hangs down 5 ℃ for 54 ℃ than the described quiet 35 Western crude wax precipitation temperatures of Liaohe Oil Field open source information; The actual oil sample wax precipitation temperature of this well production in the time of 3 months is 51 ℃, than 54 ℃ low 3 ℃ of the described quiet 35 eastern oil wax precipitation temperatures of Liaohe Oil Field open source information; The actual oil sample wax precipitation temperature of this well production in the time of 6 months is 53 ℃, than 54 ℃ low 1 ℃ of the described quiet 35 eastern oil wax precipitation temperature of Liaohe Oil Field open source information;
This mill trial results shows: after this well adopted technical scheme of the present invention, oil reservoir seepage flow fluid supply capacity was largely increased, and effect of increasing production is extremely remarkable, and it is still effective to have surpassed 6 months effective time, estimated that its period of validity can reach more than 7 months; Average production fluid amount increases to 6 ton per days by 0 ton/day before testing, and average oil production increases to 2 ton per days by 0 ton per day before testing; Totally produced 390 tons of crude oil on March 5th, 2010, accumulative total has a net increase of produces about 390 tons of crude oil; To March 5 in 2010 daily fluid production rate still more than 3 ton per days, oil production is still at 1.4 ton per days, estimates that this pilot production can also produce crude oil more than 40 tons, can also have a net increase of crude oil more than 40 tons; After 600 tons of water yields that the deduction test adds, on average have a net increase of liquid measure 3 ton per days, have a net increase of oil production 2 ton per days; Efficiently solve this well not production fluid, the difficult problem that can't produce.
Embodiment 12
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: in oil reservoir, add chemical agent and hot fluid, simultaneously, in order to improve the temperature of hot fluid in oil reservoir, reduce the heat waste before hot fluid enters oil reservoir, contain the heat energy releasing agent that thermal chemical reaction can take place in the described hot fluid;
Described chemical agent is that main active ingredient is the water-soluble thinner of commodity of chlorination dodecyl trimethyl ammonium; Described hot fluid is 60～65 ℃ clear water;
Described heat energy releasing agent is natrium nitrosum and 1: 1 mixture of ammonium chloride.
Using the present invention with D4-X2 is example:
The D4-X2 well belongs to Fu Laer base oil field, after building up in September, 2007, can not produce crude oil with common oil production method; Adopt steam oil production method, inject 1500 tons of 350 ℃ of high-temperature steams to oil reservoir, theoretical calculating shows needs to burn 82 tons of fuel oil for this reason, actual in 85 tons of fuel oil; The normal oil recovery produced 2 months after annotating vapour, 500 tons of accumulative total production fluid amounts, and 72 tons of accumulative total crude oil extractions, the crude oil that produces is not enough to offset steam injection and consumes burnt fuel oil; Therefore, without any economic worth, this well stops with the steam soak thermodynamic oil extraction process mode of production this well then with the steam soak thermal recovery technology, and closing well is idle;
Actual detected shows: reservoir temperature is 20 ℃ around this well, 20 ℃ of viscosity 11000mP.s of the crude oil sample that produces, 23 ℃ of wax precipitation temperatures; Therefore, reservoir temperature is lower than the crude oil wax precipitation temperature around this well, crude oil has been analysed wax in oil reservoir, the wax crystalline substance of analysing has seriously stopped up oil reservoir seepage flow space, cause reservoir permeability significantly to reduce, crude oil in the oil reservoir is difficult to smooth seepage flow to oil well, thereby causes oil reservoir feed flow difficulty, and oil well can't ordinary production;
In order to solve the feed flow difficult problem of this well oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow this oil well ordinary production, this well is used the present invention in March, 2008 and has been carried out pilot production, its technical scheme is: with first 20 tons of the water-soluble thinners of squeeze note commodity (main active ingredient is the chlorination dodecyl trimethyl ammonium) in this casing of high-pressure pump, and then contain 500 tons in the clear water of the natrium nitrosum-ammonium chloride mixt of 5% weight concentration to 60～65 ℃ of this casing squeeze notes, with this clear water the chemical agent mixture in the sleeve pipe is pushed in the oil reservoir; And then to 50 tons in 40～70 ℃ of clear water of this casing squeeze note, the clear water that will contain natrium nitrosum-ammonium chloride pushes in the oil reservoir, be allowed to condition in the oil reservoir and mix naturally with crude oil, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of mixture of crude oil in the oil reservoir and chemical agent, water to this production well, rise to ground by this production well again;
Test shows: described chemical agent mixture density is with to contain the clear water difference of natrium nitrosum, ammonium chloride bigger, described chemical agent can be in several minutes time and 70 ℃ of hot water form stable emulsion; Owing to be a kind of Turbulence Flow state after this clear water enters oil well oil conduit, can in oil pipe, constantly mix with described chemical agent mixture, emulsification, although therefore this clear water temperature is 60～65 ℃, can influences the stability of emulsion, but still can described chemical agent be pushed in the oil reservoir enough this clear water; Because it is littler than the clear water density that contains natrium nitrosum, ammonium chloride not contain the clear water of natrium nitrosum, ammonium chloride, therefore can push the clear water that contains natrium nitrosum, ammonium chloride in the sleeve pipe in the oil reservoir from top to bottom with the clear water that does not contain natrium nitrosum, ammonium chloride;
Test shows: the aqueous solution that contains 5% natrium nitrosum, 5% ammonium chloride can spontaneous generation exothermic reaction when 60～65 ℃ of temperature, emits heat and nitrogen; In sour environment, the reaction speed of this reaction can be accelerated;
Test shows: the dewaxing temperature of this well crude oil sample is 28 ℃; In 28 ℃ of crude oil samples of this well, add 10% described chemical agent mixture, can reduce by 5 ℃ of its wax precipitation points;
Calculating shows: 60～65 ℃ of clear water that contain 5% natrium nitrosum, 5% ammonium chloride are added in this well for 500 tons, can make the reservoir temperature in 12 meters of the radiuses around this well improve more than 9 ℃, it was remained on more than 29 ℃ in 48 hours, be higher than the dewaxing temperature of this well crude oil sample more than 1 ℃; Hence one can see that: 60～70 ℃ of clear water that contain 5% natrium nitrosum, 5% ammonium chloride can melt the wax crystalline substance in (or dissolving) oil reservoir;
Therefore, described chemical agent mixture and 60～65 ℃ of clear water joint synergies that contain 5% natrium nitrosum, 5% ammonium chloride, the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 12 meters of the radiuses around this well effectively can be reduced freezing point, the wax precipitation point of its crude oil;
This well is used technical scheme of the present invention opening well and making production after 3 days, actual tests detects and shows: the 20 ℃ of viscosity of crude 170mP.s of actual oil sample when this well is produced 3 months, be 1.5% of this well crude oil original viscosity, wax precipitation temperature is 17 ℃, reduces by 6 ℃ than its original wax precipitation temperature.
This well was used after the technical scheme of the present invention ordinary production 6 months, added up 500 tons of production fluid amounts in by the end of October, 2008 to, 320 tons of accumulative total crude oil extractions, and economic benefit is extremely remarkable.
Embodiment 13
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: in order to prevent that chemical agent from entering high infiltration water layer in a large number and causing the chemical agent waste, also in order to allow chemical agent enter same oil well more equably or/and the different permeabilities position of the different permeability oil reservoirs in the water injection well or same oil reservoir, in the hole, and guarantee that chemical agent and hot fluid can add in the oil reservoir smoothly, earlier to oil well or/and water injection well or/and hot fluid is squeezed in the oil reservoir pilot scale, in oil reservoir, add chemical agent and hot fluid again, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then.
Described examination is squeezed and to be referred to: to oil well or/and water injection well or/and the water-filling method of experimentizing property of oil reservoir or exploration or scouting property, is the oil field recover the oil produce in maturation process method commonly used.Described examination is squeezed and can be guaranteed to add chemical agent and hot fluid smoothly in oil reservoir, and meets the regulation requirement of the countries concerned's standard, industry standard, company standard.
Quiet 35 is example with the Liaohe Oil Field.
The Liaohe Oil Field open source information shows: quiet 35 reservoir pore spaces are mainly intergranular pore, and the pore throat radius is 2.83 microns, and a small amount of corrosion hole and crack are arranged; Porosity type be height ooze the inhomogeneous type of the thin larynx of macropore and in ooze the inhomogeneous type of the thin larynx of macropore, pore radius is generally 5～50 microns, 13 microns of average out to; Reservoir pore throat uniformity coefficient is 0.342, and non-homogeneity is more serious, the general 17-24% of reservoir porosity, and permeability is generally 200～2000 * 10
-3Um
2The producing well segment length is 50～150 meters, 24 meters of oil reservoir average thickness, and 0.1～8 meter of individual layer core intersection, 3～25 layers of the individual well oil reservoir numbers of plies, 3.1 meters of average mud stone thickness of interlayer have a small amount of gas enclosure layer and water trapping layer, and most of well has oil-water common-layer more than 1 layer;
Because this block crude oil wax precipitation point is 42～54 ℃, the oilfield sewage or the clear water that are lower than this wax precipitation point enter in this block oil reservoir and can analyse wax by the aggravation oil reservoir, and therefore described oilfield sewage or the clear water temperature that enters this block oil reservoir can not be lower than 42～54 ℃; Accordingly, squeeze according to examination and to utilize oil pipe or sleeve pipe carries out, can draw the surface temperature scope of described oilfield sewage or clear water by relevant calculation; For example adopt sleeve pipe examination to squeeze, calculate and show that described oilfield sewage or clear water surface temperature are not less than 70 ℃, examination and squeeze flow and be not less than 10 tons/hour, its temperature that enters oil reservoir will satisfy examination and squeeze temperature requirement greater than 54 ℃;
Because water enters the resistance of high permeability oil reservoir less than the low-permeability oil reservoir from oil well, therefore the water that tries to squeeze can preferentially enter in the high permeability oil reservoir, thereby improve the resistance that chemical agent enters the high permeability oil reservoir, the amount that makes chemical agent enter low permeability pay is improved relatively; Accordingly, according to the different situations of every mouthful of each oil reservoir of well, those of ordinary skill in the art utilizes existing method and data to calculate the examination water squeezing weight range that can draw described oilfield sewage or clear water; Be example with Jing35-31-41Jing, utilize this borehole logging tool data and quiet 35 geologic informations, show through calculating: this well examination is squeezed 10～20 tons of oilfield sewages and can significantly be improved the resistance that chemical agent enters the high permeability oil reservoir, the non-homogeneity of this well high permeability oil reservoir of active balance and low-permeability oil reservoir makes chemical agent can enter in each oil reservoir with the speed of relative equilibrium; Accordingly, determine that oilfield sewage is squeezed in the Jing35-31-31Jing examination or the clear water amount is 10～20 tons; Allow chemical agent, hot fluid enter the different oil reservoirs in the same oil well more equably or/and allow chemical agent enter the problem of the different parts of same oil reservoir more equably by trying to squeeze oilfield sewage or clear water, having solved.
Open source information shows: water and water-fast organic solvent such as oil, can form oil-water interface, and produce interfacial tension; The pore throat radius of the quiet 35 blocks of oil reservoirs in Liaohe Oil Field (reservoir) intergranular pore is 2.83 microns, and corrosion hole and fracture pore radius are generally 5～50 microns, and 13 microns of average out to all belong to the capillary tube category, and the crude oil in the oil reservoir just is stored in wherein; Relevant calculation can show; It is very big to be in interfacial tension or capillary force that this radius oil-water interface capillaceous produces; Earlier add organic solvent such as oil in oil reservoir, if there is water in the capillary tube, this organic solvent will form oil-water interface with water, produces oil-water interfacial tension, hinders the displacement in the capillary tube of organic solvent such as oil; And because organic solvent such as oil can dissolve each other with crude oil, if what exist in the capillary tube is oil but not water, organic solvent just can not produce interfacial tension with crude oil, can not stop the displacement in the capillary tube of organic solvent such as oil; Therefore, no matter add behind the organic solvent again and to add chemical agent in the oil reservoir and whether can produce new liquid-liquid interface with organic solvent, the capital hinders chemical agent and preferentially enters moisture manyly or all be the capillary tube of water because of the existence of this oil-water interfacial tension, and can preferentially select to enter in the capillary tube that contains crude oil of this oil-water interfacial tension not or in the moisture low tubule; Therefore, in oil reservoir, add organic solvent earlier, in oil reservoir, add chemical agent and hot fluid again, can effectively hinder chemical agent and enter water layer; Because chemical agent enters water layer and can not play a role, enter that the amount of water layer is more few just to mean that more chemical agent has entered oil reservoir and plays a role, therefore with adding organic solvent earlier in oil reservoir, the method for adding chemical agent and hot fluid prevents that chemical agent from entering the high permeability water layer in a large number and useful its effect of wasting chemical agent can be expected in the oil reservoir again.
Embodiment 14
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: in order to improve the sweep efficiency of formation pressure and hot fluid, in oil reservoir, add special gas or foam solution earlier, in oil reservoir, add chemical agent and hot fluid again, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then;
Described foam solution is made in the high pressure line of ground with the expanding foam solution of being made up of 5% lauryl sodium sulfate and 95% clear water less than the nitrogen of 5MPa by pressure; Described chemical agent is that main component is the oil-soluble oil displacement agent of the organic solution of phenanthrene; Described hot fluid is 50～60 ℃ of clear water.
Using the present invention with D5-X5 is example:
The D5-X5 well belongs to Fu Laer base oil field, after building up in September, 2007, can not produce crude oil with common oil production method; Adopt steam oil production method, inject 1500 tons of 350 ℃ of high-temperature steams to oil reservoir, theoretical calculating shows needs to burn 82 tons of fuel oil for this reason, actual in 85 tons of fuel oil; The normal oil recovery produced 2 months after annotating vapour, 400 tons of accumulative total production fluid amounts, and 60 tons of accumulative total crude oil extractions, the crude oil that produces is not enough to offset steam injection and consumes burnt fuel oil; Therefore, without any economic worth, this well stops with the steam soak thermodynamic oil extraction process mode of production this well then with the steam soak thermal recovery technology, and closing well is idle;
Actual detected shows: reservoir temperature is 20 ℃ around this well, 20 ℃ of viscosity 11000mP.s of the crude oil sample that produces, 23 ℃ of wax precipitation temperatures; Therefore, reservoir temperature is lower than the crude oil wax precipitation temperature around this well, crude oil has been analysed wax in oil reservoir, the wax crystalline substance of analysing has seriously stopped up oil reservoir seepage flow space, cause reservoir permeability significantly to reduce, crude oil in the oil reservoir is difficult to smooth seepage flow to oil well, thereby causes oil reservoir feed flow difficulty, and oil well can't ordinary production;
In order to solve the feed flow difficult problem of this well oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow this oil well ordinary production, this well is used the present invention in April, 2008 and has been carried out pilot production, its technical scheme is: 10000 standard cubic meter pressure are made foam solution less than the nitrogen of 5MPa for 20 tons with the expanding foam solution of being made up of 5% lauryl sodium sulfate, 95% clear water in the high pressure line of ground, with existing method this foam solution is injected oil reservoir from this casing then; And then be 10 tons of the tank oil dissolubility oil displacement agents of luxuriant and rich with fragrance organic solution to this casing squeeze note main component; And then be no more than nitrogen 10000 standard cubic meters of 12MPa to 400 tons in 50～60 ℃ of clear water of this casing squeeze note and pressure, with this clear water and nitrogen the foam solution in the sleeve pipe, oil displacement agent are pushed in the oil reservoir; Allow foam solution, oil displacement agent, 50～60 ℃ of clear water in oil reservoir, mix naturally with crude oil, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, improve the sweep efficiency of formation pressure and water, make the smooth seepage flow of mixture of crude oil in the oil reservoir and oil displacement agent, foam solution, water to this production well, rise to ground by this production well again.
Test shows: though described oil displacement agent can become liquids and gases with described foam solution separated and dissolved, but because described clear water is a kind of Turbulence Flow state after entering oil well oil conduit, can in oil pipe, constantly mix with foam solution, oil displacement agent, nitrogen, emulsification, therefore can described foam solution, oil displacement agent, nitrogen be pushed in the oil reservoir enough this clear water;
Open source information shows: high pressure nitrogen can pass through special ejector, foam maker with the expanding foam solution of being made up of 5% lauryl sodium sulfate, 95% clear water and form the high pressure foam solution in the high pressure line of ground;
Test shows: the dewaxing temperature of this well crude oil sample is 28 ℃; In this well crude oil sample, add 10% described oil displacement agent, can reduce by 5 ℃ of its wax precipitation points, make its dewaxing temperature be down to 23 ℃;
Calculating shows: 400 tons in 50～60 ℃ of clear water are added in this well, the reservoir temperature in 12 meters of the radiuses around this well is improved more than 5 ℃, it was remained on more than 25 ℃ in 48 hours, be higher than the dewaxing temperature of this well crude oil sample more than 2 ℃; Hence one can see that: 50～60 ℃ clear water can melt the wax crystalline substance in (or dissolving) oil reservoir;
Therefore, described oil displacement agent and 50～60 ℃ of clear water joint synergies can effectively reduce freezing point, the wax precipitation point of its crude oil with the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 12 meters of the radiuses around this well;
This well is used technical scheme of the present invention opening well and making production after 3 days, actual tests detects and shows: the 20 ℃ of viscosity of crude l30mP.s of actual oil sample when this well is produced 3 months, be 1% of this well crude oil original viscosity, wax precipitation temperature is 17 ℃, reduces by 6 ℃ than its original wax precipitation temperature;
This well was used after the technical scheme of the present invention ordinary production 6 months, added up 700 tons of production fluid amounts in by the end of October, 2008 to, 500 tons of accumulative total crude oil extractions, and economic benefit is extremely remarkable.
Embodiment 15
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: improve formation pressure with liquid carbon dioxide, reduce the viscosity of crude in the oil reservoir, in oil reservoir, add extraordinary chemical agent earlier, in oil reservoir, add liquid carbon dioxide again, in oil reservoir, add hot fluid then, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, improve the formation pressure energy, make the smooth seepage flow of crude oil in the oil reservoir to oil well, with existing method crude oil is promoted to ground from oil well again;
Described extraordinary chemical agent is that 10% n-butyl ether, 50% mixes the chemical agent that heavy benzene, 10% methyln-hexyl ketone, 10% fusel oil, 10% dimethylnaphthalene, 10%1-methyl naphthalene mix; Described hot fluid is 80～90 ℃ of oilfield sewages;
Using the present invention with D5-X3 is example:
The D5-X3 well belongs to Fu Laer base oil field, after building up in October, 2007, can not produce crude oil with common oil production method; Adopt steam oil production method, inject 1500 tons of 350 ℃ of high-temperature steams to oil reservoir, theoretical calculating shows needs to burn 82 tons of fuel oil for this reason, actual in 85 tons of fuel oil; The normal oil recovery produced 2 months after annotating vapour, 400 tons of accumulative total production fluid amounts, and 30 tons of accumulative total crude oil extractions, the crude oil that produces is not enough to offset steam injection and consumes burnt fuel oil; Therefore, without any economic worth, this well stops with the steam soak thermodynamic oil extraction process mode of production this well then with the steam soak thermal recovery technology, and closing well is idle;
Actual detected shows: reservoir temperature is 20 ℃ around this well, 20 ℃ of viscosity 11000mP.s of the crude oil sample that produces, 23 ℃ of wax precipitation temperatures; Therefore, reservoir temperature is lower than the crude oil wax precipitation temperature around this well, crude oil has been analysed wax in oil reservoir, the wax crystalline substance of analysing has seriously stopped up oil reservoir seepage flow space, cause reservoir permeability significantly to reduce, crude oil in the oil reservoir is difficult to smooth seepage flow to oil well, thereby causes oil reservoir feed flow difficulty, and oil well can't ordinary production;
In order to solve the feed flow difficult problem of this well oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow this oil well ordinary production, this well is used the present invention in April, 2008 and has been carried out pilot production, its technical scheme is: inject in this casing by 10% n-butyl ether, 50% with high-pressure pump and mix 20 tons in the chemical agent mixture that heavy benzene, 10% methyln-hexyl ketone, 10% fusel oil, 10% dimethylnaphthalene, 10%1-methyl naphthalene mix, with this chemical agent mixture the water in the oil well is pushed back in the oil reservoir; And then with carbon dioxide special high-pressure pump to 50 tons of this casing squeeze note liquid carbon dioxides, with liquid carbon dioxide the chemical agent mixture is advanced in the oil reservoir; And then in this casing, inject 600 tons of 80～90 ℃ of oilfield sewages with high-pressure pump, with this clear water the liquid carbon dioxide in the sleeve pipe is pushed in the oil reservoir; Allow liquid carbon dioxide, chemical agent, 80～90 ℃ of clear water in oil reservoir, mix naturally with crude oil, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce wax precipitation temperature and the viscosity of crude oil in the oil reservoir, improve the formation pressure energy, make the smooth seepage flow of mixture of crude oil in the oil reservoir and carbon dioxide, chemical agent, water to this production well, rise to ground by this production well again;
Open source information shows: the commodity liquid carbon dioxide can be in accumulating more than-10 ℃, and carbon dioxide reduces viscosity of crude;
Test shows: liquid carbon dioxide is suitable with described chemical agent mixture density, therefore can advance the described chemical agent mixture in the sleeve pipe in the oil reservoir from top to bottom by enough liquid carbon dioxides; Because liquid carbon dioxide runs into 80～90 ℃ of clear water and can vaporize, dissolve, therefore can liquid carbon dioxide be pushed in the oil reservoir enough this clear water;
Test shows: the dewaxing temperature of this well crude oil sample is 28 ℃; In this well crude oil sample, add 10% described chemical agent mixture, can reduce by 6 ℃ of its wax precipitation points, make its dewaxing temperature be down to 21 ℃;
Calculating shows: 50 tons of liquid carbon dioxides are added in the oil reservoir, and high energy makes around this well that reservoir temperature descends 1 ℃ in 7 meters of the radiuses, and its limit minimum temperature at oil reservoir can not be lower than-15 ℃;
Calculating shows: 600 tons of 80～90 ℃ of oilfield sewages are added in this well, can replenish 50 tons of liquid carbon dioxides vaporization institute from the heat of oil reservoir absorption, and can make the reservoir temperature in 12 meters of the radiuses around this well improve more than 5 ℃, it was remained on more than 25 ℃ in 48 hours, be higher than the dewaxing temperature of this well crude oil sample more than 4 ℃; Hence one can see that: 80～90 ℃ oilfield sewage can melt the wax crystalline substance in (or dissolving) oil reservoir;
Therefore, the oilfield sewage joint synergy of described chemical agent mixture and 80～90 ℃ can effectively reduce the wax precipitation point of its crude oil with the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 12 meters of the radiuses around this well;
This well is used technical scheme of the present invention opening well and making production after 5 days, actual tests detects and shows: the 20 ℃ of viscosity of crude 110mP.s of actual oil sample when this well is produced 3 months, be 1% of this well crude oil original viscosity, wax precipitation temperature is 16 ℃, reduces by 7 ℃ than its original wax precipitation temperature;
This well was used after the technical scheme of the present invention ordinary production 7 months, added up 800 tons of production fluid amounts in by the end of November, 2008 to, 630 tons of accumulative total crude oil extractions, and economic benefit is extremely remarkable.
Embodiment 16
A kind of exploitation method for wax precipitation oil reservoir may further comprise the steps: for the wax precipitation temperature of more effective reduction crude oil in oil reservoir, add peroxide aqueous solution earlier in oil reservoir, add chemical agent and hot fluid again in the oil reservoir oil reservoir;
Described peroxide aqueous solution is 70～80 ℃ of clear water that contain carbamide peroxide 1wt%; Described chemical agent is respectively 1-methyl naphthalene mixed liquor and polyoxyethylene octyl phenol ether-10 melt liquid that contains 1wt% dibenzoyl peroxide-99wt%; Described hot fluid is respectively 70～80 ℃ of oilfield sewages and 70～80 ℃ of oilfield sewages that contain 0.2% hydrogen peroxide;
Using the present invention with the 705-1 well is example:
The 705-1 well belongs to Fu Laer base oil field, after building up in June, 2006, can not produce crude oil with common oil production method; Adopt steam oil production method, inject 1500 tons of 350 ℃ of high-temperature steams to oil reservoir, theoretical calculating shows needs to burn 82 tons of fuel oil for this reason, actual in 85 tons of fuel oil; The normal oil recovery produced 2 months after annotating vapour, 400 tons of accumulative total production fluid amounts, and 80 tons of accumulative total crude oil extractions, the crude oil that produces is not enough to offset steam injection and consumes burnt fuel oil; Therefore, without any economic worth, this well stops with the steam soak thermodynamic oil extraction process mode of production this well then with the steam soak thermal recovery technology, and closing well is idle;
Actual detected shows: reservoir temperature is 20 ℃ around this well, 20 ℃ of viscosity 11000mP.s of the crude oil sample that produces, 23 ℃ of wax precipitation temperatures; Therefore, reservoir temperature is lower than the crude oil wax precipitation temperature around this well, crude oil has been analysed wax in oil reservoir, the wax crystalline substance of analysing has seriously stopped up oil reservoir seepage flow space, cause reservoir permeability significantly to reduce, crude oil in the oil reservoir is difficult to smooth seepage flow to oil well, thereby causes oil reservoir feed flow difficulty, and oil well can't ordinary production;
In order to solve the feed flow difficult problem of this well oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow this oil well ordinary production, this well is used the present invention in April, 2008 and has been carried out pilot production, and its technical scheme is: 50 tons in 70～80 ℃ of clear water that contain earlier carbamide peroxide 1wt% with high-pressure pump injection in this casing; Inject 10 tons of 1-methyl naphthalene mixed liquors that contain 1wt% dibenzoyl peroxide and 99wt% in this casing with high-pressure pump again; In this casing, inject 100 tons of 70～80 ℃ of oilfield sewages with high-pressure pump again, carbamide peroxide, dibenzoyl peroxide, 1-methyl naphthalene are pushed in the oil reservoir; Be 40 ℃ 10 tons of polyoxyethylene octyl phenol ether-10 melt liquids again with high-pressure pump implantation temperature in this casing; Inject 100 tons of 70～80 ℃ of oilfield sewages in this casing with high-pressure pump again polyoxyethylene octyl phenol ether-10 melt liquid is pushed oil reservoir; 100 tons of 70～80 ℃ of oilfield sewages that contain 0.2% hydrogen peroxide again with high-pressure pump in this casing; Inject 150 tons of 70～80 ℃ of oilfield sewages with high-pressure pump to this casing again; With the wax crystalline substance of fusing in (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of mixture of crude oil in the oil reservoir and chemical agent, water to this production well, rise to ground by this production well again;
Open source information shows: the degree of porosity 33% of this well, permeability are 1200～2000 * 10
-3Um
2, the oil reservoir shortage of natural, the viscosity of crude under the oil reservoir is 11000mPa.S, crude oil has certain flowability in oil reservoir;
Open source information shows: though carbamide peroxide, hydrogen peroxide, dibenzoyl peroxide all can discharge free oxygen atom, temperature can be accelerated this reaction speed, micro heavy ion in the oil reservoir also can accelerate this reaction speed, but because its concentration in sewage is very low, the reaction pressure that produces can be absorbed by oil reservoir, can not work the mischief to oil well, oil reservoir, therefore can be applied in this well oil reservoir;
Though carbamide peroxide, hydrogen peroxide, dibenzoyl peroxide all can decompose polyoxyethylene octyl phenol ether-10, but because this technical scheme is isolated it with 100 tons of sewage, therefore carbamide peroxide, hydrogen peroxide, dibenzoyl peroxide have reacted in oil reservoir before running into polyoxyethylene octyl phenol ether-10 and have finished, and can seriously not decompose polyoxyethylene octyl phenol ether-10;
Experiment shows: polyoxyethylene octyl phenol ether-10 is water insoluble, but can form emulsion with water, oil, therefore can effectively reduce the decomposition of carbamide peroxide, hydrogen peroxide, dibenzoyl peroxide, also can be advanced in the oil reservoir by sewage;
Laboratory test shows: 1-methyl naphthalene density and sewage are suitable, can be advanced in the oil reservoir by sewage;
Interrelated data and test show: below 100 ℃, carbamide peroxide, hydrogen peroxide, dibenzoyl peroxide can preferentially decompose macromolecular substances such as asphalitine, colloid, wax molecule, therefore can not decompose the 1-methyl naphthalene in a large number and offset its effect;
Test shows: the dewaxing temperature of this well crude oil sample is 28 ℃; In this well crude oil sample, add 10% described 1-methyl naphthalene, can reduce by 7 ℃ of its wax precipitation points, make its dewaxing temperature be down to 22 ℃;
Calculating shows: 500 tons of 70～80 ℃ of oilfield sewages are added in this well, the reservoir temperature in 12 meters of the radiuses around this well is improved more than 5 ℃, it was remained on more than 25 ℃ in 48 hours, be higher than the dewaxing temperature of this well crude oil sample more than 3 ℃; Hence one can see that: 70～80 ℃ oilfield sewage can melt the wax crystalline substance in (or dissolving) oil reservoir;
Therefore, the oilfield sewage joint synergy of described 1-methyl naphthalene and 70～80 ℃ can effectively reduce the wax precipitation point of its crude oil with the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 12 meters of the radiuses around this well;
This well is used technical scheme of the present invention opening well and making production after 5 days, actual tests detects and shows: the 20 ℃ of viscosity of crude 160mP.s of actual oil sample when this well is produced 3 months, be 1.5% of this well crude oil original viscosity, wax precipitation temperature is 18 ℃, reduces by 5 ℃ than its original wax precipitation temperature;
This well was used after the technical scheme of the present invention ordinary production 6 months, added up 480 tons of production fluid amounts in by the end of November, 2008 to, 310 tons of accumulative total crude oil extractions, and economic benefit is extremely remarkable.
It should be noted that when described chemical agent adds peroxide, can not contain high molecular surfactant and polymer.
Described peroxide should be able to guarantee that it can decomposite in oil reservoir that free oxygen maybe can destroy asphaltene molecules, the wax molecule carbon chain maybe can destroy the structure of asphalitine phase, and guarantees that it is adding the regulation requirement that theory of evolution agent and/or hot fluid meet the countries concerned's standard, industry standard, company standard in using.
Embodiment 17
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: in order to improve formation pressure, in oil reservoir, add the inert gas releasing agent aqueous solution earlier, in oil reservoir, add chemical agent and hot fluid again, with the wax crystalline substance in fusing (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, improve formation pressure, make the smooth seepage flow of crude oil in the oil reservoir to oil well, with existing method crude oil is promoted to ground from oil well again;
Described chemical agent is the water-soluble pour-point depressants of commodity; Described hot fluid is 70～80 ℃ of oilfield sewages; Described inert gas releasing agent is respectively the normal temperature oilfield sewage solution and two kinds of 30～40 ℃ of oilfield sewage solution that contain the 5wt% ammonium carbonate that contains the 3wt% ammonium nilrite;
Open source information shows: the ammonium nilrite crystal reacts quickening when being heated, and can explode in time more than 60 ℃; Ammonium nitrate can resolve into ammonium nilrite more than 110 ℃; Therefore, industry ammonium nitrate, the aqueous ammonium nitrate solution of concentration more than 10% has danger, it is added meeting violation relevant oilfield enterprise standard code and requirement in the oil reservoir, do not belong to inert gas releasing agent category of the present invention, and its maximum adding quantity of amounting to 100% pure product can not be above 10 tons.
Using the present invention with the D6-X3 well is example:
The D6-X3 well belongs to Fu Laer base oil field, after building up in November, 2007, can not produce crude oil with common oil production method; Adopt steam oil production method, inject 1500 tons of 350 ℃ of high-temperature steams to oil reservoir, theoretical calculating shows needs to burn 82 tons of fuel oil for this reason, actual in 85 tons of fuel oil; The normal oil recovery produced 2 months after annotating vapour, 400 tons of accumulative total production fluid amounts, and 40 tons of accumulative total crude oil extractions, the crude oil that produces is not enough to offset steam injection and consumes burnt fuel oil; Therefore, without any economic worth, this well stops with the steam soak thermodynamic oil extraction process mode of production this well then with the steam soak thermal recovery technology, and closing well is idle;
Actual detected shows: reservoir temperature is 20 ℃ around this well, 20 ℃ of viscosity 11000mP.s of the crude oil sample that produces, 23 ℃ of wax precipitation temperatures; Therefore, reservoir temperature is lower than the crude oil wax precipitation temperature around this well, crude oil has been analysed wax in oil reservoir, the wax crystalline substance of analysing has seriously stopped up oil reservoir seepage flow space, cause reservoir permeability significantly to reduce, crude oil in the oil reservoir is difficult to smooth seepage flow to oil well, thereby causes oil reservoir feed flow difficulty, and oil well can't ordinary production;
In order to solve the feed flow difficult problem of this well oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow this oil well ordinary production, this well use the present invention in May, 2008 and carried out pilot production, its technical scheme is: inject 20 tons of the water-soluble pour-point depressants of commodity with high-pressure pump in this casing earlier; Inject 100 tons of 30～40 ℃ of oilfield sewage solution that contain the 5wt% ammonium carbonate in this casing with high-pressure pump again; Inject 50 tons of normal temperature oilfield sewage solution that contain the 3wt% ammonium nilrite in this casing with high-pressure pump again; In this casing, inject 550 tons of 70～80 ℃ of oilfield sewages with high-pressure pump again; With the wax crystalline substance of fusing in (or dissolving) oil reservoir, reduce the wax precipitation temperature of crude oil in the oil reservoir, make the smooth seepage flow of mixture of crude oil in the oil reservoir and inert gas, chemical agent, water to this production well, rise to ground by this production well again;
Open source information shows: the degree of porosity 33% of this well, permeability are 1200～2000 * 10
-3Um
2, the oil reservoir shortage of natural, the viscosity of crude under the oil reservoir is 11000mPa.S, crude oil has certain flowability in oil reservoir;
Open source information shows: though ammonium nilrite under 70～80 ℃ of environment can with the ammonium carbonate fast reaction, but because its concentration in sewage is very low, the reaction pressure that produces can be absorbed by oil reservoir, can not work the mischief to oil well, oil reservoir, therefore can be applied in this well oil reservoir;
Though the decomposition reaction of ammonium nilrite can be broken the polymer substance in the water-soluble thinner of meeting commodity, but because this technical scheme is isolated ammonium nilrite and the water-soluble thinner of commodity with 100 tons of ammonium carbonate solutions, ammonium nilrite preferably ammonium carbonate reaction and the water-soluble thinner of noncommodity again after entering oil reservoir, and because the obstruction of crude oil is difficult to the water-soluble thinner of comprehensive engagement commodity, although therefore the decomposition reaction of ammonium nilrite may have certain influence to the water-soluble thinner of commodity, be not enough to cause its inefficacy;
Open source information shows: ammonium carbonate can not produce free oxygen base, can not decompose the water-soluble thinner of commodity;
Test shows: the density of the water-soluble thinner of commodity and water is suitable, though less than ammonium carbonate solution, can constantly mix in sleeve pipe with it, therefore can the water-soluble thinner of commodity be advanced in the oil reservoir enough ammonium carbonate solutions;
Test shows: the dewaxing temperature of this well crude oil sample is 28 ℃; In 28 ℃ of these well crude oil samples, add the water-soluble thinner of 10% commodity, can reduce by 5 ℃ of its wax precipitation points;
Calculating shows: 600 tons of 70～80 ℃ of oilfield sewages are added in this well, the reservoir temperature in 10 meters of the radiuses around this well is improved more than 9 ℃, it was remained on more than 29 ℃ in 48 hours, be higher than the dewaxing temperature of this well crude oil sample more than 1 ℃; Hence one can see that: 70～80 ℃ oilfield sewage can melt the wax crystalline substance in (or dissolving) oil reservoir;
Therefore, the oilfield sewage joint synergy of the water-soluble thinner of described commodity and 70～80 ℃ can effectively reduce the wax precipitation point of its crude oil with the brilliant fusing of wax (or dissolving) of separating out in the oil reservoir in 10 meters of the radiuses around this well;
This well is used technical scheme of the present invention opening well and making production after 3 days, actual tests detects and shows: the 20 ℃ of viscosity of crude 190mP.s of actual oil sample when this well is produced 3 months, be 1.7% of this well crude oil original viscosity, wax precipitation temperature is 18 ℃, reduces by 5 ℃ than its original wax precipitation temperature;
This well was used after the technical scheme of the present invention ordinary production 5 months, added up 580 tons of production fluid amounts in by the end of November, 2008 to, 270 tons of accumulative total crude oil extractions, and economic benefit is extremely remarkable.
Embodiment 18
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: for remove adjacent to oil well area by the wax crystalline substance or/and the oil layer blocking that organic matters such as asphalitine cause, by oil well or/and the water injection well sleeve pipe produced of can recovering the oil or/and oil pipe, in the oil reservoir of near wellbore zone, add 1-10 ton chemical agent and 10-100 ton hot fluid, to remove the near wellbore zone oil layer blocking, the crude oil that makes the oil reservoir deep smoothly seepage flow oil-feed well or/and the water injection well that can recover the oil and produce, allow crude oil from oil well with existing method again or/and rise to the water injection well of producing that can recover the oil ground for remove adjacent to oil well area by the wax crystalline substance or/and the oil layer blocking that organic matters such as asphalitine cause;
The surface temperature of described chemical agent should be higher than 25 ℃, can add before hot fluid in the oil reservoir;
Described hot fluid surface temperature should be higher than 80 ℃, adds oil well casing or/and the flow of oil pipe should be greater than 5 tons/hour;
Described chemical agent is no more than 50% expansion-resisting agent or/and hot fluid contains 1-10 ton valid density;
Described chemical agent and hot fluid at ground or oil well casing or/and oil pipe mixes the back adds in the oil reservoir.
Because chemical agent of the present invention and hot fluid can effectively reduce the brilliant dewaxing temperature of wax in the oil reservoir, the wax crystalline substance in (or dissolving) oil reservoir can be effectively melted in the two synergy; Therefore those of ordinary skills can expect that according to technical scheme of the present invention and experimental data it removes adjacent to oil well area wax crystalline substance or/and organic matters such as asphalitine stop up the effect of oil reservoir.
Embodiment 19
A kind of exploitation method for wax precipitation oil reservoir, may further comprise the steps: cross oil well all or/and the water injection well sleeve pipe produced of can recovering the oil or/and oil pipe, in the oil reservoir of near wellbore zone, add the methyl naphthalene that is in a liquid state under the 1-10 ton normal temperature, methyl naphthalene liquid, mixture and 50-10000 standard cubic meter special gas that any one or two or more arbitrary proportion of extraordinary organic liquid mixes, with special gas this mixture is pushed in the oil reservoir, to remove the near wellbore zone oil layer blocking, the crude oil that makes the oil reservoir deep smoothly seepage flow oil-feed well or/and the water injection well that can recover the oil and produce allows crude oil from oil well or/and rise to ground the water injection well of producing that can recover the oil with existing method again;
Because chemical agent of the present invention and hot fluid can effectively reduce the brilliant dewaxing temperature of wax in the oil reservoir, the wax crystalline substance in (or dissolving) oil reservoir can be effectively melted in the two synergy; Because the mixture that any one or two or more arbitrary proportion of the methyl naphthalene that is in a liquid state under the normal temperature of the present invention, methyl naphthalene liquid, extraordinary organic liquid mixes can effectively dissolve the wax crystalline substance, and enter can not form behind the oil reservoir and solidify; Therefore those of ordinary skills can expect that according to technical scheme of the present invention and experimental data it removes adjacent to oil well area wax crystalline substance or/and organic matters such as asphalitine stop up the effect of oil reservoir.
Obviously, the above embodiment of the present invention only is for example of the present invention clearly is described, and is not to be restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here can't give exhaustive to all embodiments.Everyly belong to the row that apparent variation that technical scheme of the present invention extends out or change still are in protection scope of the present invention.
Claims (106)
1. an exploitation method for wax precipitation oil reservoir is characterized in that, may further comprise the steps: add chemical agent and hot fluid in the oil reservoir, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil rise to ground then from oil well;
Described chemical agent be methyl naphthalene, thinner, oil displacement agent, methyl naphthalene liquid, extraordinary organic liquid, special fluid, extraordinary melt liquid any one or arbitrarily two or more arbitrary proportion mix and do not have a mixture of bad chemical reaction;
Described thinner comprises: with methyl naphthalene liquid be main active ingredient oil-soluble viscosity reducer, be the thinner of main active ingredient or be the oil-soluble viscosity reducer of main active ingredient with extraordinary organic liquid with surfactant;
Described oil displacement agent comprises: with sulfonate surfactant be main active ingredient oil displacement agent, with the carboxylate surfactant for the oil displacement agent of main active ingredient, with polyether surfactant be main active ingredient oil displacement agent, be the oil displacement agent of main active ingredient or be the oil displacement agent of main active ingredient with cationic surface active agent with nonionic-anionic amphoteric surfactant;
Described methyl naphthalene liquid comprise in the following liquid any one or between them arbitrarily two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) methyl naphthalene, fusel oil mixing material;
2) methyl naphthalene, organic solvent mixing material;
3) methyl naphthalene emulsion, suspension;
4) the methyl naphthalene liquid that is in a liquid state below 50 ℃;
5) methyl naphthalene that is in a liquid state below 100 ℃ and condensed ring aromatic hydrocarbon mixing material;
6) methyl naphthalene that is in a liquid state below 100 ℃ and condensed ring aromatic hydrocarbon derivative mixing material;
7) methyl naphthalene that is in a liquid state below 100 ℃ and biphenyl mixing material;
8) methyl naphthalene that is in a liquid state below 50 ℃ and crude oil mixed liquor body;
9) methyl naphthalene and liquid petroleum resin mixing material;
10) methyl naphthalene that is in a liquid state below 100 ℃ and Petropols mixing material;
Described extraordinary organic liquid comprise following liquid any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) pure class I liquid I; Described pure class I liquid I is methyl alcohol;
2) ester class I liquid I;
3) aromatic hydrocarbons liquid;
4) heavy aromatics liquid; Described heavy aromatics liquid is carbon nine, carbon ten liquid;
5) solvent naphtha liquid; Described solvent naphtha liquid is alkane solvent oil;
6) the hydro carbons autopolymer liquid that is in a liquid state below 100 ℃;
7) the methyl naphthalene melt liquid that is in a liquid state below 50 ℃;
8) paraffin content is lower than 10% crude oil;
9); The organic liquid of not chloride element, element sulphur in the molecular formula;
10) the Petropols liquid that is in a liquid state below 100 ℃;
11) bio-oil that is in a liquid state below 100 ℃, cracking bio-oil liquid;
Described special fluid comprise following liquid any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) surfactant liquids that is in a liquid state below 100 ℃;
2) the oily molten or water-soluble polymer liquid that is in a liquid state below 100 ℃;
3) the condensed ring aromatic hydrocarbon liquid that is in a liquid state below 100 ℃;
4) the condensed ring aromatic hydrocarbon derivative liquid that is in a liquid state below 100 ℃;
5) wax-proofing agent that is in a liquid state under the normal temperature;
6) the oil base paraffin remover that is in a liquid state under the normal temperature;
7) the water base paraffin remover that is in a liquid state under the normal temperature;
8) the Petropols liquid that is in a liquid state below 100 ℃;
Described extraordinary melt liquid comprise following any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) the condensed ring aromatic hydrocarbon melt liquid that is in a liquid state below 200 ℃;
2) the condensed ring aromatic hydrocarbon derivative melt liquid that is in a liquid state below 200 ℃;
3) the oily molten or water-soluble polymer melt liquid that is in a liquid state below 200 ℃;
4) the surfactant melt liquid that is in a liquid state below 200 ℃;
5) the Petropols melt liquid that is in a liquid state below 200 ℃;
6) the hydro carbons autopolymer melt liquid that is in a liquid state below 200 ℃.
2. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: described methyl naphthalene is the mixture of any one or any two or more arbitrary proportion in 1-methyl naphthalene, 2-methyl naphthalene, the mixed methylnaphthalene.
3. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: described is that the oil displacement agent of main active ingredient comprises with sodium alkyl sulfonate, sodium alkyl benzene sulfonate, petroleum sodium sulfonate or alkyl toluene sodium sulfonate being the oil displacement agent liquid of main active ingredient with sulfonate surfactant.
4. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: describedly comprise with soap or petroleum carboxylate being the oil displacement agent liquid of main active ingredient with the carboxylate surfactant for the oil displacement agent of main active ingredient.
5. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: described is that the oil displacement agent of main active ingredient comprises with peregal type surfactant, OP type surfactant or tween type surfactant being the oil displacement agent liquid of main active ingredient with polyether surfactant.
6. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: described is that the oil displacement agent of main active ingredient comprises that with polyoxyethylene polyoxypropylene alkyl alcohol ether sulphonate, polyoxyethylene polyoxypropylene alkyl alcohol ether carboxylate, polyoxyethylene polyoxypropylene alkyl alcohol ether sulfuric acid or polyoxyethylene polyoxypropylene alkyl alcohol ether phosphate ester salt be the oil displacement agent liquid of main active ingredient with nonionic-anionic amphoteric surfactant.
7. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: described is that the oil displacement agent of main active ingredient comprises that with chlorination dodecylbenzyl Dimethyl Ammonium, chlorination dodecyl trimethyl ammonium, chlorination dodecyl ammonium be the oil displacement agent liquid of main active ingredient with cationic surface active agent.
8. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: described surfactant be in the following substances any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) water soluble anionic surfactant;
2) water-soluble cationic surfactant;
3) water soluble nonionic surfactant;
4) oil-soluble anion surfactant;
5) oil-soluble non-ionic surface active agent;
6) biosurfactant;
7) amphoteric surfactant;
8) high molecular surfactant.
9. exploitation method for wax precipitation oil reservoir according to claim 8, it is characterized in that: described water soluble anionic surfactant comprises that sodium alkyl sulfonate, sodium alkyl benzene sulfonate, alkyltrimethyl ammonium chloride, polyethenoxy alkylphenols carboxylic acid sodium salt, polyoxyethylated alkyl alcohol carboxylic acid sodium salt, polyethenoxy alkylphenols sulfonate sodium, polyoxyethylated alkyl alcohol sulfonate sodium, polyoxyethylated alkyl alcohol sulfuric ester sodium salt, polyethenoxy alkylphenols sulfuric ester sodium salt, structural formula are C
nF
2n+1The carboxylic acid sodium type fluorine surfactant of COONa, wherein n represents that 4～10 integer, structural formula are C
8F
17CONH (CH
2)
5The carboxylic acid sodium type fluorine surfactant of COONa, structural formula are R
fOC
6H
4The carboxylic acid sodium type fluorine surfactant of COONa, structural formula are C
nF
2n+1SO
3Na sodium sulfonate type fluorine surfactant, wherein n represents 5 or 7 or 9, structural formula is C
3F
7(CH
2)
nSO
3The sodium sulfonate type fluorine surfactant of Na, wherein n represents 5 or 7 or 9, structural formula is C
nF
2n+1C
6H
4SO
3The sodium sulfonate type fluorine surfactant of H, wherein n represents 5 or 7 or 9, structural formula is C
7F
15CH
2OSO
3The sulfuric acid type fluorine surfactant of Na, structural formula are (CF
3)
2CF
2(CH
2)
6OSO
3The sulfuric acid type fluorine surfactant of Na or structural formula are C
8F
17SO
2NH (CH
2)
3NH (CH
2)
3NHCH
2CH
2OSO
3The sulfuric acid type fluorine surfactant of Na.
10. exploitation method for wax precipitation oil reservoir according to claim 8, it is characterized in that: described water-soluble cationic surfactant is chlorination dodecylbenzyl Dimethyl Ammonium, chlorination dodecyl trimethyl ammonium or chlorination dodecyl ammonium.
11. exploitation method for wax precipitation oil reservoir according to claim 8 is characterized in that: described water soluble nonionic surfactant is polyoxyethylated alkyl alcohol, polyethenoxy alkylphenols, polyoxyethylene octyl phenol ether-10, polyoxyethylene octyl phenol ether-7, polyoxyethylene polyoxypropylene propylene glycol, sorbitan monocarboxylate APEO or Span-20.
12. exploitation method for wax precipitation oil reservoir according to claim 8 is characterized in that: described oil-soluble anion surfactant is oil-soluble petroleum sodium sulfonate, oil-soluble oil carboxylic acid sodium, oil-soluble mahogany acid potassium or mahogany acid ammonium.
13. exploitation method for wax precipitation oil reservoir according to claim 8 is characterized in that: described oil-soluble non-ionic surface active agent is F (CF
2)
m(CH
2)
nH, wherein m=10 or 12, n=8 or 12 or 14 or 18 or 24, polyoxyethylene octadecylamine-7, lauroyl ethylene glycol amine, fish oil acyl ethylene glycol amine, polyoxyethylene alkylamide, C
10F
19O (CH
2CH
2O)
23C
100F
19Or C
3FO (CF-CFO)
nA
r, wherein n represents 1 or 2, A
rThe expression aryl.
14. exploitation method for wax precipitation oil reservoir according to claim 8 is characterized in that: described biosurfactant is with the biologic product with surface-active effect of bioengineering or biological method production, nutrient solution, the aqueous solution, emulsion, suspension or dry manufactured goods.
15. exploitation method for wax precipitation oil reservoir according to claim 8 is characterized in that: described amphoteric surfactant is polyoxyethylated alkyl alcohol sulfuric ester sodium salt, polyoxyethylated alkyl alcohol sulfuric ester ammonium salt, the polyoxyethylated alkyl alcohol organic phosphate disodium salt, two (polyoxyethylated alkyl alcohol) phosphate kalium salt, the polyoxyethylated alkyl alcohol carboxylic acid sodium salt, the polyoxyethylated alkyl alcohol sulfonate sodium, polyethenoxy alkylphenols sulfuric ester sodium salt, the polyethenoxy alkylphenols organic phosphate disodium salt, the polyethenoxy alkylphenols carboxylic acid sodium salt, the polyethenoxy alkylphenols sulfonate sodium, Aminodithioformate, alkyl-dimethyl glycine inner salt, alkyl amine group propionic acid inner salt or the A of thunder rice group.
16. exploitation method for wax precipitation oil reservoir according to claim 8 is characterized in that: described high molecular surfactant is high molecular surfactant 2020, high molecular surfactant 2040, high molecular surfactant 2060, high molecular surfactant 2070, high molecular surfactant AE, high molecular surfactant AES, high molecular surfactant AEP, high molecular surfactant AEC, high molecular surfactant AESO, high molecular surfactant APES, high molecular surfactant APEP, high molecular surfactant APEC, high molecular surfactant APESO, high molecular surfactant SP, high molecular surfactant BP or high molecular surfactant GP.
17. exploitation method for wax precipitation oil reservoir according to claim 1, it is characterized in that: the molten or water-soluble polymer of described oil comprises alkylphenol formaldehyde resin, polyacrylate, the polycarboxylic acids vinyl acetate, ethene and vinyl carboxylate copolymer, ethene and carboxylic acid propylene ester copolymer, ethene and acrylate copolymer, ethene and methacrylate copolymer, ethene and maleic acid ester copolymer, styrene and maleic acid ester copolymer, alpha-olefin and maleic acid ester copolymer, vinyl acetate and acrylate copolymer, vinyl acetate and maleic acid ester copolymer, ethene, vinyl alcohol and vinyl carboxylate copolymer, ethene, acrylic acid and acrylate copolymer, ethene, vinyl methyl ether and maleic acid ester copolymer, ethene, vinyl acetate and maleic acid ester copolymer, ethene, vinyl carboxylates and propene sulfonic acid salt copolymer, ethene, acrylate and propene sulfonic acid salt copolymer or acrylate, in vinylpyridine and the butanediol double methacrylate copolymer any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction.
18. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: described condensed ring aromatic hydrocarbon liquid comprise following any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) condensed ring aromatic hydrocarbon, fusel oil mixing material;
2) condensed ring aromatic hydrocarbon, organic solvent mixing material;
3) condensed ring aromatic hydrocarbon emulsion, suspension;
4) the condensed ring aromatic hydrocarbon liquid that is in a liquid state below 100 ℃;
5) the condensed ring aromatic hydrocarbon that is in a liquid state below 100 ℃, biphenyl mixing material;
6) the condensed ring aromatic hydrocarbon that is in a liquid state below 100 ℃, crude oil mixed liquor body;
7) condensed ring aromatic hydrocarbon, liquid petroleum resin mixing material;
10) the condensed ring aromatic hydrocarbon that is in a liquid state below 100 ℃, Petropols mixing material;
11) condensed ring aromatic hydrocarbon, organic liquid mixing material.
19. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: described condensed ring aromatic hydrocarbon derivative liquid comprise following any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) the condensed ring aromatic hydrocarbon derivative is dissolved in the mixing material of fusel oil;
2) the condensed ring aromatic hydrocarbon derivative is dissolved in the mixing material of organic solvent;
3) condensed ring aromatic hydrocarbon derivative emulsion, suspension;
4) the condensed ring aromatic hydrocarbon derivative liquid that is in a liquid state below 100 ℃;
5) the condensed ring aromatic hydrocarbon derivative that is in a liquid state below 100 ℃, biphenyl mixing material;
6) the condensed ring aromatic hydrocarbon derivative that is in a liquid state below 100 ℃, crude oil mixed liquor body;
7) the condensed ring aromatic hydrocarbon derivative is dissolved in the mixing material of liquid petroleum resin;
10) the condensed ring aromatic hydrocarbon derivative that is in a liquid state below 100 ℃, Petropols mixing material;
11) the condensed ring aromatic hydrocarbon derivative is dissolved in the mixing material of organic liquid.
20. according to claim 1 or 18 described exploitation method for wax precipitation oil reservoir, it is characterized in that: described condensed ring aromatic hydrocarbon is any one or any mixture of two or more arbitrary proportion between them in naphthalene, anthracene, phenanthrene, acenaphthene, aphthacene, pyrene, the benzo acenaphthene.
21. according to claim 1 or 19 described exploitation method for wax precipitation oil reservoir, it is characterized in that: the condensed ring aromatic hydrocarbon derivative be dimethylnaphthalene, naphthols, naphthalenediol, methylphenanthrene, phenanthrol any one or between them arbitrarily two or more any ratio mixture.
22. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that, by oil well chemical agent and hot fluid is added in the oil reservoir.
23. exploitation method for wax precipitation oil reservoir according to claim 22 is characterized in that: by oil well casing chemical agent and hot fluid are added in the oil reservoir.
24. exploitation method for wax precipitation oil reservoir according to claim 22 is characterized in that: by oil well oil conduit chemical agent and hot fluid are added in the oil reservoir.
25. exploitation method for wax precipitation oil reservoir according to claim 22, it is characterized in that, may further comprise the steps: in oil well casing, add special gas earlier, in oil reservoir, add chemical agent and hot fluid by oil well oil conduit then, make the smooth seepage flow of crude oil in the oil reservoir to oil well, then crude oil is risen to ground from oil well.
26. exploitation method for wax precipitation oil reservoir according to claim 1, it is characterized in that, may further comprise the steps: pass through oil well, chemical agent and hot fluid are added in this oil well oil reservoir on every side, make crude oil and chemical agent, the smooth seepage flow of hot fluid mixture in the oil reservoir be back to this oil well, rise to ground by this oil well again.
27. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: with chemical agent and hot fluid on ground or/and mix the back in the oil well and add in the oil reservoir.
28. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: with chemical agent and hot fluid respectively or/and alternately add in the oil reservoir.
29. exploitation method for wax precipitation oil reservoir according to claim 22, it is characterized in that, may further comprise the steps: earlier chemical agent is added in the oil well, then hot fluid is added in the oil well, the chemical agent pushing tow is controlled the precalculated position of oil reservoir with hot fluid to this oil well, make crude oil and chemical agent, the smooth seepage flow of hot fluid mixture in the oil reservoir be back to this oil well, rise to ground by this oil well again
30. exploitation method for wax precipitation oil reservoir according to claim 22, it is characterized in that, may further comprise the steps: earlier with chemical agent and its 1-10 hot fluid doubly on ground or/and mix the back in the oil well and add in the oil well, then hot fluid is added in the oil well, chemical agent and hot fluid mixture pushing tow are controlled the precalculated position of oil reservoir with hot fluid to this oil well, make crude oil and chemical agent, the smooth seepage flow of hot fluid mixture in the oil reservoir be back to this oil well, rise to ground by this oil well again.
31. exploitation method for wax precipitation oil reservoir according to claim 27, it is characterized in that, may further comprise the steps: earlier with chemical agent and hot fluid on ground or/and mix the back in the oil well and add in the oil well, enter into the precalculated position of this oil well control oil reservoir again by oil well, make crude oil and chemical agent, the smooth seepage flow of hot fluid mixture in the oil reservoir be back to this oil well, rise to ground by this oil well again.
32. exploitation method for wax precipitation oil reservoir according to claim 22, it is characterized in that, may further comprise the steps: earlier chemical agent is added in the oil well, then with special gas with in the chemical agent pushing tow oil-feed layer, then hot fluid is added in the oil well, with the precalculated position of chemical agent pushing tow to this oil well control oil reservoir, make crude oil and chemical agent, the smooth seepage flow of hot fluid mixture in the oil reservoir be back to this oil well with hot fluid, rise to ground by this oil well again.
33. exploitation method for wax precipitation oil reservoir according to claim 22, it is characterized in that, may further comprise the steps: earlier with chemical agent and its 1-10 hot fluid doubly on ground or/and mix the back in the oil well and add in the oil well, then with special gas with in chemical agent, the hot fluid mixture pushing tow oil-feed layer, then hot fluid is added in the oil well, the chemical agent pushing tow is controlled the precalculated position of oil reservoir with hot fluid to this oil well, make crude oil and chemical agent, the smooth seepage flow of hot fluid mixture in the oil reservoir be back to this oil well, rise to ground by this oil well again.
34. exploitation method for wax precipitation oil reservoir according to claim 23 is characterized in that: by oil well casing with chemical agent and hot fluid respectively or/and mix the precalculated position that the back adds oil well and then is pushed into oil well control oil reservoir.
35. exploitation method for wax precipitation oil reservoir according to claim 24 is characterized in that: by oil well oil conduit with chemical agent and hot fluid respectively or/and mix the precalculated position that the back adds oil well and then is pushed into oil well control oil reservoir.
36. exploitation method for wax precipitation oil reservoir according to claim 23, it is characterized in that: earlier in oil well casing, add special gas, then by oil well oil conduit with chemical agent and hot fluid respectively or/and mix the precalculated position that the back adds oil reservoir and then is pushed into oil well control oil reservoir.
37. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: by water injection well chemical agent and hot fluid are added in the oil reservoir.
38. according to the described exploitation method for wax precipitation oil reservoir of claim 37, it is characterized in that: by the water injection well sleeve pipe chemical agent and hot fluid are added in the oil reservoir.
39. according to the described exploitation method for wax precipitation oil reservoir of claim 37, it is characterized in that: by injection well tubing chemical agent and hot fluid are added in the oil reservoir.
40. according to the described exploitation method for wax precipitation oil reservoir of claim 38, it is characterized in that, may further comprise the steps: in the water injection well sleeve pipe, add special gas earlier, in oil reservoir, add chemical agent and hot fluid by injection well tubing then, make the smooth seepage flow of crude oil in the oil reservoir to oil well, allow crude oil from oil well, rise to ground then.
41. exploitation method for wax precipitation oil reservoir according to claim 1, it is characterized in that, may further comprise the steps: earlier water injection well is converted to oil well, with chemical agent-hot fluid associating huff and puff oil recovery mode the residual crude oil in the oil reservoir around the water injection well is exploited out then.
42. according to the described exploitation method for wax precipitation oil reservoir of claim 37, it is characterized in that, may further comprise the steps: with chemical agent and hot fluid on ground or/and mix the back in the water injection well and add in the oil reservoir.
43. according to the described exploitation method for wax precipitation oil reservoir of claim 37, it is characterized in that, may further comprise the steps: chemical agent and hot fluid are distinguished or/and alternately add in the oil reservoir by water injection well.
44. exploitation method for wax precipitation oil reservoir according to claim 1, it is characterized in that, may further comprise the steps: by centerwell, chemical agent and hot fluid are added in the oil reservoir, order about in the producing well of the smooth seepage flow of crude oil around the centerwell in the oil reservoir, again crude oil is risen to ground from producing well.
45. according to the described exploitation method for wax precipitation oil reservoir of claim 44, it is characterized in that: by the centerwell sleeve pipe chemical agent and hot fluid are added in the oil reservoir.
46. according to the described exploitation method for wax precipitation oil reservoir of claim 44, it is characterized in that, may further comprise the steps: by the centerwell oil pipe chemical agent and hot fluid are added in the oil reservoir.
47. according to the described exploitation method for wax precipitation oil reservoir of claim 44, it is characterized in that, may further comprise the steps: in the centerwell sleeve pipe, add special gas earlier, by the centerwell oil pipe chemical agent and hot fluid are added in the oil reservoir then.
48. according to the described exploitation method for wax precipitation oil reservoir of claim 47, it is characterized in that, may further comprise the steps: described special gas also can periodically add in the centerwell sleeve pipe.
49. according to the described exploitation method for wax precipitation oil reservoir of claim 44, it is characterized in that: described producing well comprises the oil well more than 1 mouthful or 1 mouthful.
50. according to the described exploitation method for wax precipitation oil reservoir of claim 44, it is characterized in that: described producing well comprises the water injection well more than 1 mouthful or 1 mouthful.
51. according to the described exploitation method for wax precipitation oil reservoir of claim 44, it is characterized in that: described producing well is the oil well of anti-5 or anti-9 layouts.
52. exploitation method for wax precipitation oil reservoir according to claim 22 is characterized in that: earlier to oil well or/and water injection well or/and hot fluid is squeezed in the oil reservoir pilot scale, adds chemical agent and hot fluid again in oil reservoir.
53. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: earlier oil reservoir is carried out acidifying or/and pressure break adds chemical agent and hot fluid again in oil reservoir.
54. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: in oil reservoir, add organic solvent earlier, in oil reservoir, add chemical agent and hot fluid again.
55. according to the described exploitation method for wax precipitation oil reservoir of claim 54, it is characterized in that: described organic solvent is water insoluble.
56. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that, may further comprise the steps: in oil reservoir, add chemical agent, expansion-resisting agent and hot fluid.
57. according to the described exploitation method for wax precipitation oil reservoir of claim 56, it is characterized in that: in oil reservoir, add expansion-resisting agent earlier, in oil reservoir, add chemical agent and hot fluid again.
58. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: in oil reservoir, add foam solution earlier, in oil reservoir, add chemical agent and hot fluid again.
59. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: in oil reservoir, add chemical agent earlier, in oil reservoir, add foam solution and hot fluid again.
60. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: in oil reservoir, adding chemical agent or/and in the hot fluid, in oil reservoir, add foam solution.
61. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that, may further comprise the steps: in oil reservoir, adding chemical agent or/and after hot fluid finishes, in oil reservoir, add foam solution.
62. according to arbitrary described exploitation method for wax precipitation oil reservoir among the claim 58-61, it is characterized in that: described foam solution comprises special gas, blowing agent and water.
63. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: in oil reservoir, add the inert gas releasing agent aqueous solution earlier, in oil reservoir, add chemical agent and hot fluid again.
64. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: in oil reservoir, add chemical agent earlier, in oil reservoir, add inert gas releasing agent and hot fluid again.
65. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: contain inert gas releasing agent and expansion-resisting agent in the described hot fluid.
66. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: contain the inert gas releasing agent in the described chemical agent.
67. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: in oil reservoir, add extraordinary chemical agent earlier, in oil reservoir, add liquid carbon dioxide again, in oil reservoir, add hot fluid again; Described extraordinary chemical agent is that freezing point is lower than-18 ℃, water content less than 0.5% chemical agent.
68. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: in oil reservoir, adding chemical agent or/and in the hot fluid, in oil reservoir, add liquid carbon dioxide.
69. according to the described exploitation method for wax precipitation oil reservoir of claim 47, it is characterized in that: add extraordinary chemical agent in the oil reservoir or/and hot fluid the time, add special gas in oil reservoir or/and in the hot fluid.
70. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: in oil reservoir, add hot fluid earlier, in oil well, add liquid carbon dioxide and chemical agent again, in oil well, add hot fluid again.
71. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that, may further comprise the steps: with special gas liquid carbon dioxide is pushed in the oil reservoir earlier, in oil well, add extraordinary chemical agent and hot fluid again; Described extraordinary chemical agent is that freezing point is lower than-18 ℃, water content less than 0.5% chemical agent.
72. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: in oil reservoir, add microbial liquid earlier, in oil reservoir, add chemical agent and hot fluid again.
73. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that, may further comprise the steps: in oil reservoir, add chemical agent earlier, in oil reservoir, add microbial liquid and hot fluid again.
74. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: described chemical agent and/or hot fluid contain microbial liquid.
75. according to the described exploitation method for wax precipitation oil reservoir of claim 74, it is characterized in that: contain surfactant or/and expansion-resisting agent in the described microbial liquid.
76. according to the described exploitation method for wax precipitation oil reservoir of claim 74, it is characterized in that: described microbial liquid is to contain to live efficiently to bite the liquid of wax bacterium.
77. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: in oil reservoir, add peroxide aqueous solution earlier, in oil reservoir, add chemical agent and hot fluid again.
78. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: add chemical agent to oil reservoir earlier, in oil reservoir, add peroxide aqueous solution and hot fluid again.
79. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: earlier the chemical agent of nonfluid shape is made the liquid that temperature is less than or equal to the hot fluid temperature, and then chemical agent liquid and hot fluid are added in the oil reservoir.
80. according to the described exploitation method for wax precipitation oil reservoir of claim 79, it is characterized in that: the chemical agent of described nonfluid shape refers to be under the construction temperature at the scene the chemical agent of solid content.
81. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: described hot fluid or/and carry out scale control treatments after the heating, and then joins in the oil reservoir before heating.
82. 1 described exploitation method for wax precipitation oil reservoir according to Claim 8, it is characterized in that: described hot fluid is heated to 110～200 ℃ before joining oil reservoir.
83. 2 described exploitation method for wax precipitation oil reservoir according to Claim 8 is characterized in that: described heating means comprise heating furnace heating, electrical heating, electromagnetism heating, microwave or ultrasonic wave heating.
84. 1 described exploitation method for wax precipitation oil reservoir according to Claim 8, it is characterized in that: described hot fluid is heated to 110～200 ℃ after joining oil reservoir.
85. 4 described exploitation method for wax precipitation oil reservoir according to Claim 8, it is characterized in that: described heating comprises pit shaft electrical heating method, kelvin effect electrical heating method, shaft bottom electrical heating method, pit shaft or shaft bottom electromagnetic heating method, pit shaft or shaft bottom microwave or ultrasonic wave heating means.
86. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: carry out well-flushing, drifting, replacing tubing string and maintenance work earlier, in oil reservoir, add chemical agent and hot fluid again.
87. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: contain the heat energy releasing agent in the described hot fluid.
88. 7 described exploitation method for wax precipitation oil reservoir according to Claim 8 is characterized in that: described heat energy releasing agent is nitrite or/and any one or two or more mixture of mixing in nitrate and ammonium chloride, urea, ammonium carbonate, the carbonic hydroammonium.
89. 8 described exploitation method for wax precipitation oil reservoir according to Claim 8, it is characterized in that: described nitrite and/or the nitrate maximum level in hot fluid can not surpass 5%, and the nitrite and/or the pure product maximum adding quantity of nitrate that are added in the oil reservoir can not be above 10 tons.
90. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: contain the inert gas releasing agent in the described hot fluid.
91. according to claim 63,64,65,66 or 90 described exploitation method for wax precipitation oil reservoir, it is characterized in that: described inert gas releasing agent is a kind of of urea, ammonium carbonate, carbonic hydroammonium, ammonium nitrate or ammonium nilrite or two or more arbitrary proportion is mixed between them mixture.
92. according to the described exploitation method for wax precipitation oil reservoir of claim 91, it is characterized in that: described ammonium nilrite and/or the ammonium nitrate maximum level in hot fluid can not surpass 5%, and the ammonium nilrite and/or the pure product maximum adding quantity of ammonium nitrate that add in the oil reservoir can not be above 10 tons.
93. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: contain surfactant in the described hot fluid.
94. exploitation method for wax precipitation oil reservoir according to claim 1 is characterized in that: described exploitation method is periodically to carry out.
95. according to claim 25,32,33,36,40,47,48,69 or 71 described exploitation method for wax precipitation oil reservoir, it is characterized in that: described special gas is any one or the mixture of two or more arbitrary proportion arbitrarily of natural gas, carbon dioxide, nitrogen, refinery gas, flue gas.
96. according to claim 56,57,65 or 75 described exploitation method for wax precipitation oil reservoir, it is characterized in that: described expansion-resisting agent is that any one or two or more arbitrary proportion in amine salt type cationic surfactant, quaternary ammonium salt cationic surfactant, pyridine salt type cationic surfactant, sylvite, ammonium salt, water-soluble aluminum salt, water-soluble zirconates, ammoniacal liquor, the aluminium polychloride clear water solution mixes and do not have a mixture of bad chemical reaction.
97. exploitation method for wax precipitation oil reservoir, it is characterized in that, may further comprise the steps: by oil well or/and the sleeve pipe of the water injection well produced of can recovering the oil or/and oil pipe, in the oil reservoir of near wellbore zone, add 1-10 ton chemical agent and 10-100 ton hot fluid, the crude oil that makes the oil reservoir deep smoothly seepage flow oil-feed well or/and the water injection well that can recover the oil and produce, again with crude oil from oil well or/and rise to ground the water injection well of producing that can recover the oil;
Described chemical agent be methyl naphthalene, thinner, oil displacement agent, methyl naphthalene liquid, extraordinary organic liquid, special fluid, extraordinary melt liquid any one or arbitrarily two or more arbitrary proportion mix and do not have a mixture of bad chemical reaction;
Described thinner comprises: with methyl naphthalene liquid be main active ingredient oil-soluble viscosity reducer, be the thinner of main active ingredient or be the oil-soluble viscosity reducer of main active ingredient with extraordinary organic liquid with surfactant;
Described oil displacement agent comprises: with sulfonate surfactant be main active ingredient oil displacement agent, with the carboxylate surfactant for the oil displacement agent of main active ingredient, with polyether surfactant be main active ingredient oil displacement agent, be the oil displacement agent of main active ingredient or be the oil displacement agent of main active ingredient with cationic surface active agent with nonionic-anionic amphoteric surfactant;
Described methyl naphthalene liquid comprise in the following liquid any one or between them arbitrarily two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) methyl naphthalene, fusel oil mixing material;
2) methyl naphthalene, organic solvent mixing material;
3) methyl naphthalene emulsion, suspension;
4) the methyl naphthalene liquid that is in a liquid state below 50 ℃;
5) methyl naphthalene that is in a liquid state below 100 ℃ and condensed ring aromatic hydrocarbon mixing material;
6) methyl naphthalene that is in a liquid state below 100 ℃ and condensed ring aromatic hydrocarbon derivative mixing material;
7) methyl naphthalene that is in a liquid state below 100 ℃ and biphenyl mixing material;
8) methyl naphthalene that is in a liquid state below 50 ℃ and crude oil mixed liquor body;
9) methyl naphthalene and liquid petroleum resin mixing material;
10) methyl naphthalene that is in a liquid state below 100 ℃ and Petropols mixing material;
Described extraordinary organic liquid comprise following liquid any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) pure class I liquid I; Described pure class I liquid I is methyl alcohol;
2) ester class I liquid I;
3) aromatic hydrocarbons liquid;
4) heavy aromatics liquid; Described heavy aromatics liquid is carbon nine, carbon ten liquid;
5) solvent naphtha liquid; Described solvent naphtha liquid is alkane solvent oil;
6) the hydro carbons autopolymer liquid that is in a liquid state below 100 ℃;
7) the methyl naphthalene melt liquid that is in a liquid state below 50 ℃;
8) paraffin content is lower than 10% crude oil;
9) organic liquid of not chloride element, element sulphur in the molecular formula;
10) the Petropols liquid that is in a liquid state below 100 ℃;
11) bio-oil that is in a liquid state below 100 ℃, cracking bio-oil liquid;
Described special fluid comprise following liquid any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) surfactant liquids that is in a liquid state below 100 ℃;
2) the oily molten or water-soluble polymer liquid that is in a liquid state below 100 ℃;
3) the condensed ring aromatic hydrocarbon liquid that is in a liquid state below 100 ℃;
4) the condensed ring aromatic hydrocarbon derivative liquid that is in a liquid state below 100 ℃;
5) wax-proofing agent that is in a liquid state under the normal temperature;
6) the oil base paraffin remover that is in a liquid state under the normal temperature;
7) the water base paraffin remover that is in a liquid state under the normal temperature;
8) the Petropols liquid that is in a liquid state below 100 ℃;
Described extraordinary melt liquid comprise following any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) the condensed ring aromatic hydrocarbon melt liquid that is in a liquid state below 200 ℃;
2) the condensed ring aromatic hydrocarbon derivative melt liquid that is in a liquid state below 200 ℃;
3) the oily molten or water-soluble polymer melt liquid that is in a liquid state below 200 ℃;
4) the surfactant melt liquid that is in a liquid state below 200 ℃;
5) the Petropols melt liquid that is in a liquid state below 200 ℃;
6) the hydro carbons autopolymer melt liquid that is in a liquid state below 200 ℃.
98. according to the described exploitation method for wax precipitation oil reservoir of claim 97, it is characterized in that: the surface temperature of described chemical agent is higher than 25 ℃, adds in the oil reservoir before hot fluid.
99. according to the described exploitation method for wax precipitation oil reservoir of claim 97, it is characterized in that: described hot fluid surface temperature is higher than 80 ℃, add oil well or/and the sleeve pipe of water injection well or/and the flow of oil pipe should be greater than 5 tons/hour.
100. according to the described exploitation method for wax precipitation oil reservoir of claim 97, it is characterized in that: described chemical agent is no more than 50% expansion-resisting agent or/and hot fluid contains 1-10 ton valid density.
101. according to the described exploitation method for wax precipitation oil reservoir of claim 100, it is characterized in that: described expansion-resisting agent is that any one or two or more arbitrary proportion in amine salt type cationic surfactant, quaternary ammonium salt cationic surfactant, pyridine salt type cationic surfactant, sylvite, ammonium salt, water-soluble aluminum salt, water-soluble zirconates, ammoniacal liquor, the aluminium polychloride clear water solution mixes and do not have a mixture of bad chemical reaction.
102. exploitation method for wax precipitation oil reservoir, it is characterized in that, may further comprise the steps: by oil well or/and the sleeve pipe of the water injection well produced of can recovering the oil or/and oil pipe, in the oil reservoir of near wellbore zone, add the methyl naphthalene that is in a liquid state under the 1-10 ton normal temperature, methyl naphthalene liquid, mixture and 50-10000 standard cubic meter special gas that any one or two or more arbitrary proportion of extraordinary organic liquid mixes, with special gas this mixture is pushed in the oil reservoir, the crude oil that makes the oil reservoir deep smoothly seepage flow oil-feed well or/and the water injection well that can recover the oil and produce, again with crude oil from oil well or/and rise to ground the water injection well of producing that can recover the oil;
Described chemical agent be methyl naphthalene, thinner, pour-point depressant, oil displacement agent, methyl naphthalene liquid, extraordinary organic liquid, special fluid, extraordinary melt liquid any one or arbitrarily two or more arbitrary proportion mix and do not have a mixture of bad chemical reaction;
Described thinner comprises: with methyl naphthalene liquid be main active ingredient oil-soluble viscosity reducer, be the thinner of main active ingredient or be the oil-soluble viscosity reducer of main active ingredient with extraordinary organic liquid with surfactant;
Described oil displacement agent comprises: with sulfonate surfactant be main active ingredient oil displacement agent, with the carboxylate surfactant for the oil displacement agent of main active ingredient, with polyether surfactant be main active ingredient oil displacement agent, be the oil displacement agent of main active ingredient or be the oil displacement agent of main active ingredient with cationic surface active agent with nonionic-anionic amphoteric surfactant;
Described methyl naphthalene liquid comprise in the following liquid any one or between them arbitrarily two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) methyl naphthalene, fusel oil mixing material;
2) methyl naphthalene, organic solvent mixing material;
3) methyl naphthalene emulsion, suspension;
4) the methyl naphthalene liquid that is in a liquid state below 50 ℃;
5) methyl naphthalene that is in a liquid state below 100 ℃ and condensed ring aromatic hydrocarbon mixing material;
6) methyl naphthalene that is in a liquid state below 100 ℃ and condensed ring aromatic hydrocarbon derivative mixing material;
7) methyl naphthalene that is in a liquid state below 100 ℃ and biphenyl mixing material;
8) methyl naphthalene that is in a liquid state below 50 ℃ and crude oil mixed liquor body;
9) methyl naphthalene and liquid petroleum resin mixing material;
10) methyl naphthalene that is in a liquid state below 100 ℃ and Petropols mixing material;
Described extraordinary organic liquid comprise following liquid any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) pure class I liquid I; Described pure class I liquid I is methyl alcohol;
2) ester class I liquid I;
3) aromatic hydrocarbons liquid;
4); Heavy aromatics liquid; Described heavy aromatics liquid is carbon nine, carbon ten liquid;
5) solvent naphtha liquid; Described solvent naphtha liquid is alkane solvent oil;
6) the hydro carbons autopolymer liquid that is in a liquid state below 100 ℃;
7) the methyl naphthalene melt liquid that is in a liquid state below 50 ℃;
8) paraffin content is lower than 10% crude oil;
9); The organic liquid of not chloride element, element sulphur in the molecular formula;
10) the Petropols liquid that is in a liquid state below 100 ℃;
11); The bio-oil that is in a liquid state below 100 ℃, cracking bio-oil liquid;
Described special fluid comprise following liquid any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) surfactant liquids that is in a liquid state below 100 ℃;
2) the oily molten or water-soluble polymer liquid that is in a liquid state below 100 ℃;
3) the condensed ring aromatic hydrocarbon liquid that is in a liquid state below 100 ℃;
4) the condensed ring aromatic hydrocarbon derivative liquid that is in a liquid state below 100 ℃;
5) wax-proofing agent that is in a liquid state under the normal temperature;
6) the oil base paraffin remover that is in a liquid state under the normal temperature;
7) the water base paraffin remover that is in a liquid state under the normal temperature;
8) the Petropols liquid that is in a liquid state below 100 ℃;
Described extraordinary melt liquid comprise following any one or between them two or more arbitrary proportion be mixed and do not have the mixture of bad chemical reaction:
1) the condensed ring aromatic hydrocarbon melt liquid that is in a liquid state below 200 ℃;
2) the condensed ring aromatic hydrocarbon derivative melt liquid that is in a liquid state below 200 ℃;
3) the oily molten or water-soluble polymer melt liquid that is in a liquid state below 200 ℃;
4) the surfactant melt liquid that is in a liquid state below 200 ℃;
5) the Petropols melt liquid that is in a liquid state below 200 ℃;
6) the hydro carbons autopolymer melt liquid that is in a liquid state below 200 ℃.
103. according to the described exploitation method for wax precipitation oil reservoir of claim 102, it is characterized in that: the surface temperature of the mixture that any one or two or more arbitrary proportion of the methyl naphthalene that is in a liquid state under the described 1-10 ton normal temperature, methyl naphthalene liquid, extraordinary organic liquid mixes is higher than 25 ℃, adds in the oil reservoir before hot fluid.
104. according to the described exploitation method for wax precipitation oil reservoir of claim 102, it is characterized in that: described hot fluid surface temperature is higher than 80 ℃, add oil well or/and the water injection well sleeve pipe or/and the flow of oil pipe should be greater than 5 tons/hour.
105. according to the described exploitation method for wax precipitation oil reservoir of claim 102, it is characterized in that: the mixture that any one or two or more arbitrary proportion of the methyl naphthalene that is in a liquid state under the described 1-10 ton normal temperature, methyl naphthalene liquid, extraordinary organic liquid mixes is no more than 50% expansion-resisting agent or/and contain 1-10 ton valid density in the hot fluid.
106. according to the described exploitation method for wax precipitation oil reservoir of claim 105, it is characterized in that: described expansion-resisting agent is that any one or two or more arbitrary proportion in amine salt type cationic surfactant, quaternary ammonium salt cationic surfactant, pyridine salt type cationic surfactant, sylvite, ammonium salt, water-soluble aluminum salt, water-soluble zirconates, ammoniacal liquor, the aluminium polychloride clear water solution mixes and do not have a mixture of bad chemical reaction.
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