CN106147736B - The de-plugging agent and its preparation of a kind of oil field wellbore cleanout and stratum scale removal and application - Google Patents
The de-plugging agent and its preparation of a kind of oil field wellbore cleanout and stratum scale removal and application Download PDFInfo
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- CN106147736B CN106147736B CN201610555558.5A CN201610555558A CN106147736B CN 106147736 B CN106147736 B CN 106147736B CN 201610555558 A CN201610555558 A CN 201610555558A CN 106147736 B CN106147736 B CN 106147736B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 41
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 235000019441 ethanol Nutrition 0.000 claims abstract description 24
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 claims abstract description 24
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims abstract description 12
- 230000003213 activating effect Effects 0.000 claims abstract description 12
- 150000002772 monosaccharides Chemical class 0.000 claims abstract description 12
- 235000011056 potassium acetate Nutrition 0.000 claims abstract description 12
- CYDQOEWLBCCFJZ-UHFFFAOYSA-N 4-(4-fluorophenyl)oxane-4-carboxylic acid Chemical compound C=1C=C(F)C=CC=1C1(C(=O)O)CCOCC1 CYDQOEWLBCCFJZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000001540 sodium lactate Substances 0.000 claims abstract description 10
- 229940005581 sodium lactate Drugs 0.000 claims abstract description 10
- 235000011088 sodium lactate Nutrition 0.000 claims abstract description 10
- 108090000790 Enzymes Proteins 0.000 claims abstract description 9
- 102000004190 Enzymes Human genes 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- MBBZMMPHUWSWHV-BDVNFPICSA-N N-methylglucamine Chemical compound CNC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO MBBZMMPHUWSWHV-BDVNFPICSA-N 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 10
- 229940088598 enzyme Drugs 0.000 claims description 8
- -1 alcohol alkane Chemical class 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 108010059892 Cellulase Proteins 0.000 claims description 4
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 3
- 239000008103 glucose Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 239000004382 Amylase Substances 0.000 claims description 2
- 108010065511 Amylases Proteins 0.000 claims description 2
- 102000013142 Amylases Human genes 0.000 claims description 2
- 235000019418 amylase Nutrition 0.000 claims description 2
- 229940106157 cellulase Drugs 0.000 claims description 2
- 108090000637 alpha-Amylases Proteins 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 29
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 abstract description 15
- 230000007935 neutral effect Effects 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 12
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 10
- 239000002738 chelating agent Substances 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- UBXAKNTVXQMEAG-UHFFFAOYSA-L strontium sulfate Chemical compound [Sr+2].[O-]S([O-])(=O)=O UBXAKNTVXQMEAG-UHFFFAOYSA-L 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000004519 grease Substances 0.000 abstract description 3
- 239000010779 crude oil Substances 0.000 abstract description 2
- 238000004090 dissolution Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 abstract 1
- 238000005554 pickling Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 14
- 238000005260 corrosion Methods 0.000 description 14
- 239000002253 acid Substances 0.000 description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000012459 cleaning agent Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 108010089934 carbohydrase Proteins 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000009533 lab test Methods 0.000 description 3
- 239000004579 marble Substances 0.000 description 3
- 230000020477 pH reduction Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 102100032487 Beta-mannosidase Human genes 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229920002907 Guar gum Polymers 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 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 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 108010055059 beta-Mannosidase Proteins 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000006071 cream Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000000665 guar gum Substances 0.000 description 2
- 235000010417 guar gum Nutrition 0.000 description 2
- 229960002154 guar gum Drugs 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- QGJDXUIYIUGQGO-UHFFFAOYSA-N 1-[2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoyl]pyrrolidine-2-carboxylic acid Chemical compound CC(C)(C)OC(=O)NC(C)C(=O)N1CCCC1C(O)=O QGJDXUIYIUGQGO-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 235000009754 Vitis X bourquina Nutrition 0.000 description 1
- 235000012333 Vitis X labruscana Nutrition 0.000 description 1
- 240000006365 Vitis vinifera Species 0.000 description 1
- 235000014787 Vitis vinifera Nutrition 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003196 chaotropic effect Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000001455 metallic ions Chemical class 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000003352 sequestering agent Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
The de-plugging agent and its preparation of a kind of oil field wellbore cleanout and stratum scale removal and application, by 5-15 parts of EDTA-2Na, 1-8 parts of α-d- sodium glucoheptonate, β-d- sodium glucoheptonate 0.5-5,2-8 parts of potassium acetate, 0.5-5 parts of sodium lactate, 2-10 parts of alcohol methyl glucamine activating agent, 0.1-10 parts of enzyme, 1-6 parts of monosaccharide, 0.5-5 parts of ethyl alcohol, 28-87.4 parts of water are mixed with, and are applied to wellbore cleanout and stratum scale removal；The present invention matches active constituent and chelating agent, inorganic dissolution reaction mainly takes mild chelating mechanism to realize, product is all to carry out in a neutral environment from start to end, synergistic effect is good, pickling can preferably be removed and the dirty matter such as barium sulfate, calcium sulfate, strontium sulfate that conventional working fluid can not be eliminated, at the same can also viscosity reduction de-plugging, remove part grease, the mobility of crude oil is improved, de-plugging is high-efficient；Water-sensitive can effectively be inhibited, water lock, the improvement had to stratum core and stablizing effect is eliminated, do not injure oil reservoir skeleton, it is good to Reservoir Protection.
Description
Technical field
The present invention relates to a kind of neutral de-plugging agent formula of safety and environmental protection, in particular to a kind of oil field wellbore cleanout and stratum
The de-plugging agent of scale removal and its preparation and application.
Technical background
In oil field development, the deposition of various inorganic scales is one serious and universal in pit shaft, oil pipe and formation rock
Problem.These dirty matter can be deposited in oil pipe, perforation eye and stratum, and the presence of dirty matter can seriously affect the flowing of fluid, cause
Decline oil-producing well production.The Crack cause of dirty matter be also it is various, the composition of the dirty matter commonly encountered be mainly calcium, magnesium,
The carbonate or sulfate of barium, strontium, iron are also frequently found.The composition and structure of dirty matter depend on the actual conditions in oil field, as sulphur
The such precipitating of sour barium and calcium sulfate is fine and close, hard and impervious deposit, often by crude oil asphalitine, colloid,
Wax film and fines are covered, so increasing solution difficulty.
With hydrochloric acid, hydrofluoric acid or Compound-acid etc., the dirty matter such as pit shaft and near wellbore zone calcium carbonate, magnesium carbonate, iron rust is removed
It is common descaling and blockage relieving method.It is characterized in that processing is quick, and it is low in cost, it is the general election mode of oilfield stimulation augmented injection.But often
Rule acidification de-plugging has the disadvantage in that
1, acidification easily forms acid sludge, and the anti-ageing oil and residual acid arranged can not be handled.
2, construction risk, it is dangerous to people, equipment, environment.
3, after acidification, oil reservoir strength reduction is loose and easily cause and shake out, and operation sand control week is often resulted in after de-plugging
Phase reduces.
4, apparatus string corrodes, and strength reduction, service life shortens.
Due to the defect of conventional acidulation, the development of neutral, non-technic acid is drawn, effect is also good, but due to taking
Recessive acid technique: i.e. on the ground solution testing be it is neutral, underground react generate acid, pass through acid and inorganic scale reaction mechanism
Come what is realized, after reaction pH value in 4-5 or so (weak acid range), and weak acid range might have iron ion secondary precipitation or other
The generation of relevant issues.And other de-plugging agents have the shortcomings that reaction speed is fast, it is big to reach oil deposit deep part, dosage.
Therefore develop a kind of real safety and environmental protection, the neutral de-plugging agent of convenient transportation is necessary, in protection oil reservoir and pipeline
On the basis of, it realizes effective de-plugging, improves yield-increasing efficiency.
Summary of the invention
To overcome above-mentioned Acidizing Technology insufficient, the purpose of the present invention is to provide a kind of oil field wellbore cleanout and stratum scale removal
De-plugging agent and its preparation and application, which is neutrality, mainly for calcium carbonate, calcium sulfate, barium sulfate, sulfuric acid
The dirt matter such as strontium has good treatment effect, which has no irritating odor and react mildly, and safety and environmental protection is biodegradable, to setting
It is standby corrosion-free, to human and environment fanout free region, it effectively prevent the generation of secondary precipitation.
In order to achieve the above object, the technical scheme of the present invention is realized as follows:
A kind of de-plugging agent of oil field wellbore cleanout and stratum scale removal, component in parts by weight: 5-15 parts of EDTA-2Na,
1-8 parts of α-d- sodium glucoheptonate, β-d- sodium glucoheptonate 0.5-5,2-8 parts of potassium acetate, 0.5-5 parts of sodium lactate, alcohol alkyl grape
2-10 parts of sugared amide activating agent, 0.1-10 parts of enzyme, 1-6 parts of monosaccharide, 0.5-5 parts of ethyl alcohol, 28-87.4 parts of water.
The EDTA-2Na is a kind of strong chelating agent, is used for complexation of metal ions.
α-d- the sodium glucoheptonate and β-d- sodium glucoheptonate is sequestering agent, nontoxic, can be generated non-ionic
Chelate inhibits precipitation by metallic ion.
The potassium acetate, sodium lactate are stabilizers, play the role of stable chelating agent.
The alcohol methyl glucamine activating agent is a kind of novel green surfactant, has good surface
The hard water resistance property of activity, biodegradability, salt tolerant and nontoxic nonirritant.
The enzyme includes mannonase cellulase, general Shandong carbohydrase or amylase, and the enzyme can degrade polymerization
Object and guar gum can remove the effect of the macromolecules dirt matter such as polymer, guar gum in oil reservoir precipitating.
The monosaccharide has the function of to promote microbial degradation.
The ethyl alcohol is chaotropic agent, plays the role of the dissolution to chelating agent.
The preparation method of a kind of oil field wellbore cleanout and the de-plugging agent of stratum scale removal, is realized by following steps:
1, by 5-15 parts of EDTA-2Na, 1-8 parts of α-d- sodium glucoheptonate, β-d- sodium glucoheptonate 0.5-5, potassium acetate 2-8
Part, 0.5-5 parts of sodium lactate, 2-10 parts of alcohol methyl glucamine activating agent, is crushed with grinder by 1-6 parts of monosaccharide, crosses 40
30 minutes are mixed to stirring evenly with cone blender after mesh, can be prepared by required pulvis；
2, reaction kettle is added in 0.5-5 parts of ethyl alcohol and 33-84.5 parts of water, is uniformly mixed, adds above-mentioned under room temperature
Pulvis is made and stirs 1 hour to being completely dissolved, is eventually adding 0.5-5 parts of enzyme, goes out kettle within stirring 20 minutes.
A kind of application of oil field wellbore cleanout and the de-plugging agent of stratum scale removal, comprising the following steps:
1, the application method of wellbore cleanout: it is 10-20% that the neutral de-plugging agent made, which is diluted to mass concentration with clear water,
Solution, inject pit shaft, wash cycles 4-6h uses 30-360 DEG C of temperature.
2, the application method of stratum scale removal: it is 10-20% that the neutral de-plugging agent made, which is diluted to mass concentration with clear water,
Solution, stratum is injected under the pressure that equipment and stratum can allow for, closing well reaction time 8-48h uses temperature 30-360
℃。
Advantage of the invention:
1, the product can play surface-active and two kinds of chelating ability effects simultaneously, and synergistic effect is good, preferably remove acid
The dirty matter such as barium sulfate, calcium sulfate, strontium sulfate that can not be eliminated with conventional working fluid is washed, the stable chelating for being dissolved in water is formed
Object, the tamper in shouting hole slowly are removed, restore to improve permeability；Inorganic scale elimination factor needs spy up to 25% or more
Not it is emphasised that the present invention to barium sulfate there are also certain solution ration, for corrosion rate 15% or more, this is conventional cleaning agent institute
The function not having.
2, peculiar chelating de-plugging effect does not injure oil reservoir skeleton, to the improvement stablizing effect that stratum core has had, to oil reservoir
Protectiveness is good.
3, have and enter the blocking of oil deposit deep part removing water lock, grease deposition, and effectively inhibit salt crust and water to lock and deposit again
The effect of formation guarantees that near wellbore zone does not re-form dirt in the longer time, to enhance the validity period of oil mining.Have
The effect phase is even longer up to 12 months, and conventional cleaning agent validity period is generally 2-3 months.
4, contained enzyme component can remove viscosity reduction dispersion viscous crude dirt, generate the row's of helping induced efficiency.Grease elimination factor exists
80% or more, conventional cleaning agent only has cleaning effect to washing oil, acts on viscous crude little.
5, pH value 7 belong to neutral, and medicament mostly uses greatly environment-friendly biodegradable preparation to form, to oil field pipe and underground
Equipment no corrosion.Corrosion rate of the invention is 0.15-0.3g/ (㎡ .h), and the corrosion rate of conventional cleaning agent is general
For the left and right 5g/ (㎡ .h), the present invention is to no corrosions such as pipe-line equipments in contrast.
Specific embodiment
The present invention will be described in detail combined with specific embodiments below.
Embodiment one
A kind of de-plugging agent of oil field wellbore cleanout and stratum scale removal of the present embodiment, is made of following substance according to parts by weight:
5 parts of EDTA-2Na, 1 part of α-d- sodium glucoheptonate, β-d- sodium glucoheptonate 0.5,2 parts of potassium acetate, 0.5 part of sodium lactate, alcohol alkyl
2 parts of glucose amide activating agent, 2 parts of mannase, 1 part of monosaccharide, 0.5 part of ethyl alcohol, 85.5 parts of water.
The preparation method of the present embodiment, is realized by following steps:
(1), by 5 parts of EDTA-2Na, 1 part of α-d- sodium glucoheptonate, 0.5 part of β-d- sodium glucoheptonate, 2 parts of potassium acetate, cream
0.5 part of sour sodium, 2 parts of alcohol methyl glucamine activating agent, are crushed with grinder by 1 part of monosaccharide, use taper after crossing 40 meshes
Mixing and blending machine is mixed 30 minutes to stirring evenly, and can be prepared by required pulvis.
(2), reaction kettle is added in 0.5 part of ethyl alcohol and 85.5 parts of water, is uniformly mixed under room temperature, add above-mentioned be made
Pulvis stirs 1 hour to being completely dissolved, and is eventually adding 2 parts of mannase, goes out kettle within stirring 20 minutes.
Neutral de-plugging agent of the present invention uses the laboratory experiment data of concentration 10%: being 26% to the corrosion rate of marble for 24 hours；
It is 16.2% to the corrosion rate of barium sulfate for 24 hours；To the corrosion rate of steel disc are as follows: 0.17g/ (㎡ .h).
The present embodiment application method: being diluted to the solution that mass concentration is 10% with clear water for the neutral de-plugging agent made,
Pit shaft is injected, wash cycles 6h, water injection pressure is substantially reduced after cleaning.
Embodiment two
A kind of de-plugging agent of oil field wellbore cleanout and stratum scale removal of the present embodiment, is made of following substance according to parts by weight:
10 parts of EDTA-2Na, 4 parts of α-d- sodium glucoheptonate, β-d- sodium glucoheptonate 2.5,5 parts of potassium acetate, 2.5 parts of sodium lactate, alcohol alkane
6 parts of base glucose amide activating agent, 4.5 parts of endoglucanase, 3 parts of monosaccharide, 2.5 parts of ethyl alcohol, 60 parts of water.
The preparation method of the present embodiment, is realized by following steps:
(1), by 10 parts of EDTA-2Na, 4 parts of α-d- sodium glucoheptonate, β-d- sodium glucoheptonate 2.5,5 parts of potassium acetate, cream
2.5 parts of sour sodium, 6 parts of alcohol methyl glucamine activating agent, are crushed with grinder by 3 parts of monosaccharide, use taper after crossing 40 meshes
Mixing and blending machine is mixed 30 minutes to stirring evenly, and can be prepared by required pulvis.
(2), reaction kettle is added in 2.5 parts of ethyl alcohol and 60 parts of water, is uniformly mixed under room temperature, adds above-mentioned obtained powder
Agent stirs 1 hour to being completely dissolved, and is eventually adding 4.5 parts of endoglucanase, goes out kettle within stirring 20 minutes.
Neutral de-plugging agent of the present invention uses the laboratory experiment data of concentration 10%: being to the corrosion rate of marble for 24 hours
27.7%；It is 17.3% to the corrosion rate of barium sulfate for 24 hours；To the corrosion rate of steel disc are as follows: 0.19g/ (㎡ .h).
The present embodiment application method: certain well, since the characteristic of low porosity and low permeability deposits injection water under the conditions of low-velocity seepage
In apparent barometric gradient, while water is locked and injury of the Jamin effect to reservoir, and water filling well pressure height, hardly possible is caused to inject.Using
The neutral de-plugging agent made is diluted to the solution that mass concentration is 15% with clear water, injects stratum by neutral block releasing technique processing,
Closing well reaction time 48h, water injection pressure is substantially reduced after driving a well.
Embodiment three
A kind of de-plugging agent of oil field wellbore cleanout and stratum scale removal of the present embodiment, is made of following substance according to parts by weight:
15 parts of EDTA-2Na, 8 parts of α-d- sodium glucoheptonate, β-d- sodium glucoheptonate 5,8 parts of potassium acetate, 5 parts of sodium lactate, alcohol alkyl Portugal
10 parts of activating agent of grape sugar amide, 8 parts of general Shandong carbohydrase, 6 parts of monosaccharide, 5 parts of ethyl alcohol, 30 parts of water.
The preparation method of the present embodiment, is realized by following steps:
1, by 15 parts of EDTA-2Na, 8 parts of α-d- sodium glucoheptonate, β-d- sodium glucoheptonate 5,8 parts of potassium acetate, sodium lactate 5
Part, 10 parts of alcohol methyl glucamine activating agent, is crushed with grinder by 6 parts of monosaccharide, is stirred after crossing 40 meshes with taper mixing
It mixes machine and is mixed 30 minutes to stirring evenly, can be prepared by required pulvis.
2, reaction kettle is added in 5 parts of ethyl alcohol and 30 parts of water, is uniformly mixed under room temperature, adds above-mentioned obtained pulvis and stir
1 hour is mixed to being completely dissolved, is eventually adding 8 parts of general Shandong carbohydrase, goes out kettle within stirring 20 minutes.
Neutral de-plugging agent of the present invention uses the laboratory experiment data of concentration 10%: being to the corrosion rate of marble for 24 hours
28.1%；It is 18.7% to the corrosion rate of barium sulfate for 24 hours；To the corrosion rate of steel disc are as follows: 0.21g/ (㎡ .h).
The application method of the present embodiment: certain oil well belongs to Carbonate Reservoir, and 90 DEG C of reservoir temperature, formation water salinity
Height, easily knot calcium sulfate, calcium carbonate block oil reservoir, and oil production is caused to decline.It is handled using neutral block releasing technique, the neutrality that will be made
De-plugging agent is diluted to the solution that mass concentration is 20% with clear water, injects stratum, and closing well reacts 40h, and crude output increases after driving a well
Add, validity period increases.
Claims (4)
1. a kind of de-plugging agent of oil field wellbore cleanout and stratum scale removal, which is characterized in that its component in parts by weight: EDTA-2Na
5-15 parts, 1-8 parts of α-d- sodium glucoheptonate, β-d- sodium glucoheptonate 0.5-5,2-8 parts of potassium acetate, 0.5-5 parts of sodium lactate, alcohol alkane
2-10 parts of base glucose amide activating agent, 0.1-10 parts of enzyme, 1-6 parts of monosaccharide, 0.5-5 parts of ethyl alcohol, 28-87.4 parts of water；
The enzyme includes mannonase cellulase, Pullulanase and amylase.
2. the preparation method of the de-plugging agent based on a kind of oil field wellbore cleanout described in claim 1 and stratum scale removal, feature
It is, is realized by following steps:
(1), by 5-15 parts of EDTA-2Na, 1-8 parts of α-d- sodium glucoheptonate, β-d- sodium glucoheptonate 0.5-5, potassium acetate 2-8
Part, 0.5-5 parts of sodium lactate, 2-10 parts of alcohol methyl glucamine activating agent, is crushed with grinder by 1-6 parts of monosaccharide, crosses 40
30 minutes are mixed to stirring evenly with cone blender after mesh, can be prepared by required pulvis；
(2), reaction kettle is added in 0.5-5 parts of ethyl alcohol and 28-87.4 parts of water, is uniformly mixed under room temperature, adds above-mentioned system
It obtains pulvis and stirs 1 hour to being completely dissolved, be eventually adding 0.1-10 parts of enzyme, go out kettle within stirring 20 minutes.
3. the application of a kind of oil field wellbore cleanout according to claim 1 and the de-plugging agent of stratum scale removal, which is characterized in that
The application method of wellbore cleanout: being diluted to the solution that mass concentration is 10-20% with clear water for the de-plugging agent made, injection
Pit shaft, wash cycles 4-6h use 30-360 DEG C of temperature.
4. the application of a kind of oil field wellbore cleanout according to claim 1 and the de-plugging agent of stratum scale removal, which is characterized in that
The application method of stratum scale removal: the de-plugging agent made is diluted to the solution that mass concentration is 10-20% with clear water, is being set
Stratum is injected under the pressure that standby and stratum can allow for, closing well reaction time 8-48h uses 30-360 DEG C of temperature.
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