CN111961457A - Oil displacement complexing agent for heavy oil reservoir and preparation method and application thereof - Google Patents
Oil displacement complexing agent for heavy oil reservoir and preparation method and application thereof Download PDFInfo
- Publication number
- CN111961457A CN111961457A CN202010797615.7A CN202010797615A CN111961457A CN 111961457 A CN111961457 A CN 111961457A CN 202010797615 A CN202010797615 A CN 202010797615A CN 111961457 A CN111961457 A CN 111961457A
- Authority
- CN
- China
- Prior art keywords
- alkyl
- sulfonate
- oil
- olefin
- low molecular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003921 oil Substances 0.000 title claims abstract description 72
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 41
- 239000000295 fuel oil Substances 0.000 title claims abstract description 39
- 239000008139 complexing agent Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 15
- -1 alkylbenzene sulfonate Chemical class 0.000 claims abstract description 74
- 150000001875 compounds Chemical class 0.000 claims abstract description 45
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 38
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 31
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 31
- 239000010779 crude oil Substances 0.000 claims abstract description 26
- 150000008052 alkyl sulfonates Chemical class 0.000 claims abstract description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000011084 recovery Methods 0.000 claims abstract description 22
- 125000004185 ester group Chemical group 0.000 claims abstract description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 4
- 239000001257 hydrogen Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 239000003795 chemical substances by application Substances 0.000 claims description 32
- 150000001336 alkenes Chemical class 0.000 claims description 11
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 8
- 159000000000 sodium salts Chemical group 0.000 claims description 7
- KEQGZUUPPQEDPF-UHFFFAOYSA-N 1,3-dichloro-5,5-dimethylimidazolidine-2,4-dione Chemical compound CC1(C)N(Cl)C(=O)N(Cl)C1=O KEQGZUUPPQEDPF-UHFFFAOYSA-N 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- XTHPWXDJESJLNJ-UHFFFAOYSA-N chlorosulfonic acid Substances OS(Cl)(=O)=O XTHPWXDJESJLNJ-UHFFFAOYSA-N 0.000 claims description 6
- 230000003472 neutralizing effect Effects 0.000 claims description 6
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 claims description 4
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 4
- 150000001348 alkyl chlorides Chemical class 0.000 claims description 4
- 239000008398 formation water Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 150000003863 ammonium salts Chemical class 0.000 claims description 3
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000004215 Carbon black (E152) Substances 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 125000003342 alkenyl group Chemical group 0.000 claims description 2
- 125000003545 alkoxy group Chemical group 0.000 claims description 2
- 125000002947 alkylene group Chemical group 0.000 claims description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 2
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 150000002170 ethers Chemical class 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 claims description 2
- 150000002367 halogens Chemical class 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 230000000379 polymerizing effect Effects 0.000 claims description 2
- 150000002118 epoxides Chemical class 0.000 claims 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 2
- 229910052708 sodium Inorganic materials 0.000 description 23
- 239000011734 sodium Substances 0.000 description 23
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 229940077388 benzenesulfonate Drugs 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 238000005065 mining Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 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 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 230000033558 biomineral tissue development Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 238000010795 Steam Flooding Methods 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229940045714 alkyl sulfonate alkylating agent Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 229940125904 compound 1 Drugs 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000015784 hyperosmotic salinity response Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000002924 oxiranes Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007858 starting material Substances 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Fluid Mechanics (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Geochemistry & Mineralogy (AREA)
- Lubricants (AREA)
- Detergent Compositions (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The application discloses an oil displacement complexing agent for a heavy oil reservoir and a preparation method and application thereof, and belongs to the technical field of oil field chemicals. The oil displacement complexing agent for the heavy oil reservoir comprises the following components in parts by weight: 1-12 parts of alkylbenzene sulfonate, 1-20 parts of alkyl sulfonate, 1-32 parts of olefin sulfonate, 1-40 parts of alkanolamide polyoxyethylene ether compound and 2-40 parts of low molecular alcohol; wherein the low molecular alcohol is selected from C3‑C10The alkanolamide polyoxyethylene ether compound is at least one compound selected from compounds with a structural formula shown in a formula I: in the formula I, m and n are selected from 0-15, but cannot be 0 at the same time, and when m and n are not 0, m is equal to n; r1 is selected from C8～C22One of the alkyl groups of (a); r2Selected from hydrogen or ester groups. The oil displacement complexing agent can be used in a tertiary oil recovery yield-increasing system of a heavy oil reservoir, can obviously reduce the viscosity of crude oil,the water-oil fluidity ratio is reduced, and the crude oil is enriched, so that the exploitation difficulty is reduced, and the crude oil recovery rate is greatly improved.
Description
Technical Field
The application relates to an oil displacement complexing agent for a heavy oil reservoir and a preparation method and application thereof, belonging to the technical field of oil field chemicals.
Background
The thick oil accounts for a large proportion of the oil and gas resources in the world. According to statistics, the reserves of the heavy oil, the ultra-heavy oil and the natural asphalt in the world exceed 1000 hundred million tons, and countries with rich heavy oil resources include Canada, Venezuela, the United states, the former Soviet Union, China, Indonesia and the like. China heavy oil asphalt resources are widely distributed, more than 70 heavy oil fields are found in 12 basins, and the quantity of the China heavy oil asphalt resources can reach more than 200 hundred million tons. In China, energy is scarce, and the heavy oil resource is one of important energy resources which cannot be ignored.
Most of the heavy oil reservoirs in China belong to low-grade petroleum resources, the physical properties of crude oil are poor, and the development, oil production, ground gathering and transportation and treatment difficulties are large. The heavy oil recovery mostly adopts a steam huff and puff and steam flooding mode, but a large amount of greenhouse gases are generated in the steam preparation process, the application of coal-fired and oil-fired boilers is limited along with the tightening of national environmental protection policies, the direction of recent development is changed from thermal recovery development to cold recovery development, and the key of the heavy oil cold recovery development is an oil displacement complexing agent.
Disclosure of Invention
The oil displacement complexing agent can be used in tertiary oil recovery of the heavy oil reservoir, can obviously reduce the viscosity of crude oil, enables the crude oil to easily flow and enrich, and reduces the water-oil fluidity ratio, thereby reducing the exploitation difficulty and greatly improving the crude oil recovery ratio.
According to one aspect of the application, an oil displacement complexing agent for a heavy oil reservoir is provided, which comprises the following components in parts by weight: 1-12 parts of alkylbenzene sulfonate, 1-20 parts of alkyl sulfonate, 1-32 parts of olefin sulfonate, 1-40 parts of alkanolamide polyoxyethylene ether compound and 2-40 parts of low molecular alcohol;
wherein the low molecular alcohol is selected from C3-C10The alkanolamide polyoxyethylene ether compound is at least one compound selected from compounds with a structural formula shown as I:
in the formula I, m and n are selected from 0-15, but cannot be 0 at the same time, and when m and n are not 0, m is equal to n; r1 is selected from C8～C22One of the alkyl groups of (a); r2Selected from hydrogen or ester groups.
Preferably, in the formula I, m and n are selected from 0-10 but cannot be 0 at the same time, and when m and n are not 0, m is equal to n; r1Is selected from C16～C20One of the alkyl groups of (a); r2Selected from hydrogen or ester groups. More preferably, in the formula I, m and n are independently selected from 1-5, and m ═ n; r1Is selected from C12～C18One of the alkyl groups of (a); r2Selected from ester groups. Optionally, the composition comprises the following components in percentage by weight: 1 to 12 weight percent of alkylbenzene sulfonate, 1 to 20 weight percent of alkyl sulfonate, 1 to 32 weight percent of olefin sulfonate, 1 to 40 weight percent of alkanolamide polyoxyethylene ether compound, 2 to 40 weight percent of low molecular alcohol and the balance of water.
Preferably, the composition comprises the following components in percentage by weight: 4 to 7 weight percent of alkylbenzene sulfonate, 5 to 15 weight percent of alkyl sulfonate, 25 to 29 weight percent of olefin sulfonate, 20 to 30 weight percent of alkanolamide polyoxyethylene ether compound, 6 to 10 weight percent of low molecular alcohol and the balance of water. The composite oil displacement agent has the advantages of good and obvious water and oil reduction effect, high oil displacement efficiency and strong oil reservoir adaptability, thereby reducing the mining difficulty, greatly improving the crude oil recovery ratio and having better popularization prospect.
More preferably, the composition comprises the following components in percentage by weight: 5 wt% of alkylbenzene sulfonate, 10 wt% of alkyl sulfonate, 27 wt% of olefin sulfonate, 25 wt% of alkanolamide polyoxyethylene ether compounds, 8 wt% of low molecular alcohol and 25 wt% of water. The composite oil displacement agent has the advantages of optimal and obvious water and oil reduction and increase effects, high oil displacement efficiency and strong oil reservoir adaptability, thereby reducing the mining difficulty, greatly improving the crude oil recovery ratio and having better popularization prospect.
Optionally, the oil-displacing compound has a solid content of 30 wt% to 60 wt%, a pH of 6 to 10, and a solubility of not less than 10g/100g water. Preferably, the oil-displacing compound has a solid content of 40-50 wt%, a pH of 8-10 and a solubility of not less than 10g/100g water.
Optionally, the alkyl group of the alkylbenzene sulfonate is selected from C8-C24One of alkyl, the alkyl in the alkyl sulfonate is C8-C24Alkyl, the olefin in the olefin sulfonate is selected from C10-C22One of the alkenyl radicals, said R1Is selected from C12-C20One of the alkyl groups.
Preferably, the alkyl group of the alkylbenzene sulfonate is selected from C10-C22One of alkyl, the alkyl in the alkyl sulfonate is C10-C22Alkyl, the olefin in the olefin sulfonate is selected from C12-C16One of alkylene, the low molecular alcohol is selected from C3-C8The hydrocarbon alcohol of (1).
More preferably, the alkyl group in the alkylbenzene sulfonate is C12-C18Alkyl radical, the alkyl sulfonic acidThe alkyl group in the acid salt is C12-C18Alkyl, the olefin in the olefin sulfonate is C12-C16Alkylene group of said R1Is selected from C12-C18One of the alkyl groups, the low molecular alcohol is propanol.
Alternatively, the alkyl group in the alkylbenzene sulfonate, the alkyl group in the alkyl sulfonate, and R1At least one independently selected from the group consisting of alkyl groups comprising linear, branched, and cyclic structures; and/or
Alkyl group in the alkylbenzene sulfonate, alkyl group in the alkyl sulfonate and R1Independently selected from the group consisting of halogen, alkyl or alkoxy.
Alternatively, the alkylbenzene sulfonate is prepared by reacting an aromatic hydrocarbon with SO in a chlorinated alkane environment3Or sulfonating chlorosulfonic acid, and neutralizing with alkali;
the alkyl sulfonate is prepared by reacting alkane with SO in chloroalkane environment3Or sulfonating chlorosulfonic acid, and neutralizing with alkali;
the olefin sulfonate is prepared by reacting olefin with SO in chloroalkane environment3Or sulfonating chlorosulfonic acid, and neutralizing with alkali; and/or
The alkanolamide polyoxyethylene ether compound is prepared by polymerizing alkanolamide and epoxide or further performing anionization.
Optionally, the low molecular alcohol is propanol or octanol;
the alkylbenzene sulfonate, the alkyl sulfonate and the olefin sulfonate are independently selected from sodium salt, potassium salt or ammonium salt; and/or
The R is2Is an ester group, and includes carboxylate, sulfate and phosphate groups. The alcohol amide polyoxyethylene ether compound can be an alcohol amide polyoxyethylene ether ester compound, the alcohol amide polyoxyethylene ether ester compound is an alcohol amide polyoxyethylene ether ester salt under alkaline conditions, and the salt can be an alkali metal salt, preferably a sodium salt, a potassium salt and an ammonium salt, and more preferably a sodium salt. Under alkaline condition, the ester group is a sulfate ester with a structural formula shown in formula II, and the phosphate ester with a structural formula shown in formula IIⅢ，
According to another aspect of the application, a preparation method of the flooding complex agent for the heavy oil reservoir is provided, and comprises the following steps:
adding the alkylbenzene sulfonate, the alkyl sulfonate, the olefin sulfonate and the low molecular alcohol into water, stirring for not less than 20min, adding the alkanolamide polyoxyethylene ether compound, and uniformly mixing.
According to still another aspect of the application, the application of a flooding compound agent of a heavy oil reservoir in tertiary oil recovery is provided, wherein the flooding compound agent is selected from one of the flooding compound agents of the heavy oil reservoir and the flooding compound agent prepared by the method.
Preferably, the relative density of the crude oil in the heavy oil reservoir is 0.9200-0.9900 mg/L, and the viscosity at 50 ℃ is 100-100000 mPa.s.
More preferably, the relative density of the crude oil in the heavy oil reservoir is 0.9300-0.9800 mg/L, and the viscosity at 50 ℃ is 1000-50000 mPa.s.
Optionally, the stratum water salinity of the heavy oil reservoir is not lower than 2000 mg/L. Preferably, the stratum water salinity of the heavy oil reservoir is 3000-30000 mg/L.
Benefits of the present application include, but are not limited to:
1. according to the oil displacement complexing agent for the heavy oil reservoir, based on the oil reservoir conditions of the mining area, according to the results of indoor tests and numerical simulation, the oil displacement complexing agent can reduce the oil-water interfacial tension, reduce the viscosity of crude oil, obtain obvious effects of lowering water and increasing oil, and has high oil displacement efficiency and strong oil reservoir adaptability, thereby reducing the mining difficulty, greatly improving the crude oil recovery ratio and having good popularization prospect.
2. According to the oil displacement complexing agent for the heavy oil reservoir, the oil displacement complexing agent can reduce the viscosity of crude oil, especially the viscosity of the heavy oil, can improve the oil recovery rate of the heavy oil reservoir which is difficult to recover, and has the advantages of high stability, good salt tolerance and small using amount.
3. The oil displacement complexing agent for the heavy oil reservoir can be used as the oil displacement complexing agent for the heavy oil reservoir, can also be suitable for the thin oil reservoir, and has a wide application range.
4. According to the preparation method of the oil displacement complexing agent, the preparation method is simple in process, beneficial to operation and low in production cost.
5. According to the application of the oil displacement complexing agent for the heavy oil reservoir in tertiary oil recovery, the oil displacement complexing agent can reduce the oil-water interfacial tension, can reduce the viscosity of crude oil, obtains obvious effects of precipitation and oil increment, and has high oil displacement efficiency and strong oil reservoir adaptability, thereby reducing the mining difficulty, greatly improving the crude oil recovery ratio and having good popularization prospect.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
Unless otherwise specified, the raw materials and catalysts in the examples of the present application were all purchased commercially.
EXAMPLE 1 preparation of starting Material
Sodium alkyl benzene sulfonates, sodium alkyl sulfonates, and sodium olefin sulfonates are commercially available.
The preparation method of the alkanolamide polyoxyethylene ether sulfate sodium salt compound is illustrated by taking R1 as C18, m is 3, n is 3 and R2 as the sulfate sodium salt, and the preparation method comprises the following steps:
1) suction and addition C18Adding fatty acid diethanolamide into a polymerization kettle, stirring, heating to 70-80 ℃, adding potassium hydroxide, and vacuumizing for dewatering for at least 1.5 hours until water is completely removed. Heating, introducing ethylene oxide, keeping the reaction temperature at 125 +/-5 ℃ and the reaction pressure at less than or equal to 0.3 MPa. After the completion of aging, the mixture was aged and absorbed for 1.5 hours and then vacuumed for 10 min.
2) And adding a mixed sulfamic acid and urea solution (catalyst) into the product, uniformly stirring, heating to 95 ℃, keeping the temperature, stirring for 1 hour, adding NaOH for neutralization to obtain a product No. 1, wherein the yield is 87%.
The reaction scheme equation is:
example 2 oil-displacing complex agent 1#
The oil displacement compound agent 1# comprises the following components in percentage by weight: c125 wt% of sodium alkyl benzene sulfonate and C1210 wt% of sodium alkylsulfonate, C12Olefin sodium sulfonate 27 wt%, C1225 wt% of alkanolamide polyoxyethylene ether, 8 wt% of propanol and 25 wt% of water.
C12R of sodium salt of alkanolamide polyoxyethylene ether sulfate1Is C12Where m is 3, n is 3, R2 is sodium sulfate salt, the structural formula is:
the preparation method of the oil displacement compound agent 1# comprises the following steps:
proportionally adding water to reactor, and adding C12Sodium alkyl benzene sulfonate, C12Sodium alkylsulfonate, C12Sodium olefin sulfonate and propanol, stirring for 25min, and adding C12Adding alkanolamide polyoxyethylene ether sulfate sodium salt into a reactor, and stirring uniformly to obtain a yellow uniform liquid with good water solubility, the solubility of the yellow uniform liquid is not lower than 10g/100g of water, and the pH value is 8-10.
Example 3 oil-displacing Complex agent No. 2
The oil displacement compound agent 2# comprises the following components in percentage by weight: c125 wt% of sodium alkyl benzene sulfonate and C1210 wt% of sodium alkylsulfonate, C16Olefin sodium sulfonate 20 wt%, C1835 wt% of alkanolamide polyoxyethylene ether sulfate sodium salt, 7 wt% of propanol and 23 wt% of water.
C18R of sodium salt of alkanolamide polyoxyethylene ether sulfate1Is C18，m＝5，n＝5，R2Is sodium sulfate, and has a structural formula as follows:
the preparation method of the oil displacement compound agent 2# comprises the following steps:
proportionally adding water to reactor, and adding C12Sodium alkylbenzenesulfonate, C12Sodium alkylsulfonate, C16Sodium olefin sulfonate and propanol, stirring for 25min, and adding C18Adding alkanolamide polyoxyethylene ether sulfate sodium salt into a reactor, and stirring uniformly to obtain a yellow uniform liquid with good water solubility, the solubility of the yellow uniform liquid is not lower than 10g/100g of water, and the pH value is 8-10.
Example 4 oil-displacing Complex agent 3#
The oil displacement compound agent No. 3 comprises the following components in percentage by weight: c18Sodium alkyl benzene sulfonate 12 wt%, C18Sodium alkylsulfonate 20 wt%, C14Olefin sulfonic acid sodium salt 15 wt%, C1222 wt% of alkanolamide polyoxyethylene ether sulfate sodium salt, 4 wt% of propanol and 27 wt% of water.
C12R of sodium salt of alkanolamide polyoxyethylene ether sulfate1Is C12，m＝5，n＝5，R2Is sulfate sodium salt, and has a molecular formula:
the preparation method of the oil displacement compound agent 3# comprises the following steps:
proportionally adding water to reactor, and adding C18Sodium alkylbenzenesulfonate, C18Sodium alkylsulfonate, C14Sodium olefin sulfonate and propanol, stirring for 25min, and adding C12Adding alkanolamide polyoxyethylene ether sulfate sodium salt into a reactor, and stirring uniformly to obtain a yellow uniform liquid with good water solubility, the solubility of the yellow uniform liquid is not lower than 10g/100g of water, and the pH value is 8-10.
Embodiment 5 oil-displacing compound agent 4# -7 #, D1# -D3 #, and
according to the preparation method of the embodiment 2, oil displacement complexing agents 1# to 12# and D1# to D4# with different types and content compositions are provided, and the specific contents are shown in a table 1, wherein C in the tablenRefers to an alkyl or alkenyl group in the compositionThe number of carbon atoms of (a).
TABLE 1
Example 6
The test method comprises the following steps:
the interfacial tension test method comprises the following steps: the oil displacement complexing agent is prepared into 0.5 percent solution by using formation water, the interfacial tension between the solution and crude oil is measured by using a Texas500C type interfacial tensiometer at 60 ℃ (simulated surface temperature), and the interfacial tension value is calculated according to a formula provided by an instrument instruction.
The viscosity reduction rate test method comprises the following steps: the flooding complex agent is prepared into 0.5 percent solution by using formation water, under the temperature of 60 ℃ (simulated surface temperature), the flooding complex agent prepared in the embodiment 2 to 5 is added into the crude oil according to the volume ratio of 1:1 of the crude oil and the flooding complex agent solution, the flooding complex agent 1# -12# and the flooding complex agent D1# -D4# are respectively added into the crude oil, and after the mixture is stirred for 1.5 hours at the temperature of 60 ℃, the viscosity of a mixed system is measured by using a rotational viscometer.
The enhanced oil recovery test method comprises the following steps: the permeability is 500 +/-50 multiplied by 10-3μm2After drilling, cutting and washing oil, the air permeability and the saturated formation water are measured, and the pore volume and the porosity are measured. Saturated oil, water flooding to water content of 90%, injecting 0.3PV 0.5% flooding compound solution (flooding compound 1# -12#, D1# -D4# prepared in examples 2-5), transferring water flooding to water content of 99%, and calculating to improve recovery rate.
The interfacial tension, viscosity reduction rate and recovery ratio of a plurality of thick oil crude oils with different densities, viscosities and mineralization degrees are tested, and the relative density of the tested crude oil is 0.9785mg/L, the viscosity is 54230mPa.s at 50 ℃ and the mineralization degree is 15134 mg/L.
The oil recovery effect of the oil displacement compound agent in the embodiment on the heavy oil reservoir is illustrated by taking the oil displacement compound agent 1# -12# and the oil displacement compound agent D1# -D4# as examples, and the results are shown in Table 2.
TABLE 2
As can be seen from Table 2, after the oil displacement complexing agent prepared by the embodiment is added, the interfacial tension is greatly reduced, the viscosity is greatly reduced, and the effect of improving the recovery ratio is obvious.
The data in table 2 can be divided into three groups: 1# -8# is a first group, m and n are not 0, and the effect is good when m + n is small; the number 9# -12# is a second group, m is 0, n is changed in value, and the effect is poorer than that of the first group; d1# -D4# is the third group, R2The effect is worst when m and n are large. For specific crude oil, temperature and salt content conditions, the optimal value is oil displacement complexing agent 1 #: c125 wt% of sodium alkyl benzene sulfonate and C1210 wt% of sodium alkylsulfonate, C12Olefin sodium sulfonate 27 wt%, C12Alkanolamide polyoxyethylene ether sulfate sodium salt 25 wt% (m ═ 3, n ═ 3, R)2Sodium salt of sulfuric acid ester), 8 wt% propanol and 25 wt% water.
The oil displacement complexing agent in the embodiment is based on the oil reservoir conditions of an exploitation area, and according to the results of indoor tests and numerical simulation, the oil displacement complexing agent has the advantages that the oil-water interfacial tension can be reduced, the viscosity of crude oil can be reduced, the obvious water and oil reduction and increase effects are obtained, the oil displacement efficiency is high, the oil reservoir adaptability is high, the exploitation difficulty is reduced, the crude oil recovery rate is greatly improved, and the popularization prospect is good.
The above description is only an example of the present application, and the protection scope of the present application is not limited by these specific examples, but is defined by the claims of the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. An oil displacement complexing agent for a heavy oil reservoir is characterized by comprising the following components in parts by weight: 1-12 parts of alkylbenzene sulfonate, 1-20 parts of alkyl sulfonate, 1-32 parts of olefin sulfonate, 1-40 parts of alkanolamide polyoxyethylene ether compound and 2-40 parts of low molecular alcohol;
wherein the low molecular alcohol is selected from C3-C10The alkanolamide polyoxyethylene ether compound is at least one compound selected from compounds with a structural formula shown as I:
in the formula I, m and n are selected from 0-15, but cannot be 0 at the same time, and when m and n are not 0, m is equal to n; r1Is selected from C8～C22One of the alkyl groups of (a); r2Selected from hydrogen or ester groups.
2. The oil-displacing compound agent according to claim 1, which comprises the following components in percentage by weight: 1 to 12 weight percent of alkylbenzene sulfonate, 1 to 20 weight percent of alkyl sulfonate, 1 to 32 weight percent of olefin sulfonate, 1 to 40 weight percent of alkanolamide polyoxyethylene ether compound, 2 to 40 weight percent of low molecular alcohol and the balance of water;
preferably, the composition comprises the following components in percentage by weight: 4 to 7 weight percent of alkylbenzene sulfonate, 5 to 15 weight percent of alkyl sulfonate, 25 to 29 weight percent of olefin sulfonate, 20 to 30 weight percent of alkanolamide polyoxyethylene ether compound, 6 to 10 weight percent of low molecular alcohol and the balance of water;
more preferably, the composition comprises the following components in percentage by weight: 5 wt% of alkylbenzene sulfonate, 10 wt% of alkyl sulfonate, 27 wt% of olefin sulfonate, 25 wt% of alkanolamide polyoxyethylene ether compounds, 8 wt% of low molecular alcohol and 25 wt% of water.
3. The oil-displacing compound agent according to claim 2, wherein the oil-displacing compound agent has a solid content of 30-60 wt%, a pH of 6-10, and a solubility of not less than 10g/100g water.
4. The flooding complex of any one of claims 1 to 3 wherein the alkyl group of the alkylbenzene sulfonate is selected from C8-C24One of alkyl, the alkyl in the alkyl sulfonate is C8-C24Alkyl, the olefin in the olefin sulfonate is selected from C10-C22One of the alkenyl radicals, said R1Is selected from C12～C20One of the alkyl groups of (a);
preferably, the alkyl group of the alkylbenzene sulfonate is selected from C10-C22One of alkyl, the alkyl in the alkyl sulfonate is C10-C22Alkyl, the olefin in the olefin sulfonate is selected from C12-C16One of alkylene, the low molecular alcohol is selected from C3-C8The hydrocarbon-based alcohol of (1);
more preferably, the alkyl group in the alkylbenzene sulfonate is C12-C18Alkyl, the alkyl in the alkyl sulfonate is C12-C18Alkyl, the olefin in the olefin sulfonate is C12-C16An alkenyl group, and the low molecular alcohol is propanol.
5. The flooding complex of claim 4, wherein the alkyl group of the alkylbenzene sulfonate, the alkyl group of the alkyl sulfonate, and R are as defined in claim 41At least one independently selected from alkyl groups comprising linear, branched, and cyclic structures; and/or
Alkyl group in the alkylbenzene sulfonate, alkyl group in the alkyl sulfonate and R1Independently selected from the group consisting of halogen, alkyl or alkoxy.
6. The flooding complex of claim 1, wherein the alkylbenzene sulfonate is formed from aromatic hydrocarbons and SO in a chlorinated alkane environment3Or sulfonating chlorosulfonic acid, and neutralizing with alkali;
the alkyl sulfonate is prepared by reacting alkane with SO in chloroalkane environment3Or sulfonating chlorosulfonic acid, and neutralizing with alkali;
the olefin sulfonate is prepared by reacting olefin with SO in chloroalkane environment3Or sulfonating chlorosulfonic acid, and neutralizing with alkali; and/or
The alkanolamide polyoxyethylene ether compound is prepared by polymerizing alkanolamide and epoxide or further anionizing.
7. The flooding complex of claim 1, wherein the low molecular alcohol is propanol or octanol;
the alkylbenzene sulfonate, the alkyl sulfonate and the olefin sulfonate are independently selected from sodium salt, potassium salt or ammonium salt; and/or
The R is2Is an ester group which is a sulfate or phosphate.
8. The method for preparing the flooding complex for heavy oil reservoirs of any one of claims 1 to 7, characterized in that it comprises the following steps:
adding the alkylbenzene sulfonate, the alkyl sulfonate, the olefin sulfonate and the low molecular alcohol into water, stirring for not less than 20min, adding the alkanolamide polyoxyethylene ether compound, and uniformly mixing.
9. The application of a flooding compound agent for heavy oil reservoirs in tertiary oil recovery is characterized in that the flooding compound agent is selected from one of the flooding compound agent for heavy oil reservoirs in any one of claims 1 to 6 and the flooding compound agent prepared by the method in claim 7;
preferably, the relative density of the crude oil in the heavy oil reservoir is 0.9200-0.9900 mg/L, and the viscosity at 50 ℃ is 100-100000 mPa.s.
10. The use of claim 8, wherein the heavy oil reservoir has a formation water salinity of no less than 2000 mg/L.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020107764011 | 2020-08-05 | ||
| CN202010776401 | 2020-08-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111961457A true CN111961457A (en) | 2020-11-20 |
| CN111961457B CN111961457B (en) | 2022-05-24 |
Family
ID=73364258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010797615.7A Active CN111961457B (en) | 2020-08-05 | 2020-08-10 | Oil displacement complexing agent for heavy oil reservoir and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111961457B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480899A (en) * | 2020-12-11 | 2021-03-12 | 德仕能源科技集团股份有限公司 | Demulsification cleanup additive for fracturing and preparation method thereof |
| CN113372246A (en) * | 2021-06-02 | 2021-09-10 | 德仕能源科技集团股份有限公司 | Production and application of surfactant for oil displacement of highly-waxy crude oil |
| CN115785934A (en) * | 2022-12-27 | 2023-03-14 | 江苏棋成化工有限公司 | Heavy alkylbenzene sulfonate oil displacement agent for tertiary oil recovery and preparation method thereof |
| CN115806812A (en) * | 2021-09-14 | 2023-03-17 | 中国石油化工股份有限公司 | Thick oil emulsifying viscosity reducer and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4544033A (en) * | 1983-04-04 | 1985-10-01 | Lion Corporation | Oil recovery process |
| CN101705083A (en) * | 2009-11-16 | 2010-05-12 | 山东德仕化工集团有限公司 | Formulation of surfactant oil displacement system for anionic and nonionic oil displacement |
| CN102399545A (en) * | 2011-12-06 | 2012-04-04 | 中国石油天然气股份有限公司 | Sand washing and well washing agent for oil well |
| CN102516974A (en) * | 2011-12-12 | 2012-06-27 | 中国石油天然气股份有限公司 | Foam profile control agent suitable for oil field deep profile control |
| CN103215019A (en) * | 2012-12-17 | 2013-07-24 | 江南大学 | Preparation and applications of surfactant for alcohol amide-sulfate composite type alkali-free oil displacement |
| CN103666431A (en) * | 2012-09-05 | 2014-03-26 | 中国石油化工股份有限公司 | Surfactant composition and preparation method thereof |
| CN111019620A (en) * | 2019-12-31 | 2020-04-17 | 田春来 | Oil field flowback-free stratum blocking remover and blocking removing method thereof |
-
2020
- 2020-08-10 CN CN202010797615.7A patent/CN111961457B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4544033A (en) * | 1983-04-04 | 1985-10-01 | Lion Corporation | Oil recovery process |
| CN101705083A (en) * | 2009-11-16 | 2010-05-12 | 山东德仕化工集团有限公司 | Formulation of surfactant oil displacement system for anionic and nonionic oil displacement |
| CN102399545A (en) * | 2011-12-06 | 2012-04-04 | 中国石油天然气股份有限公司 | Sand washing and well washing agent for oil well |
| CN102516974A (en) * | 2011-12-12 | 2012-06-27 | 中国石油天然气股份有限公司 | Foam profile control agent suitable for oil field deep profile control |
| CN103666431A (en) * | 2012-09-05 | 2014-03-26 | 中国石油化工股份有限公司 | Surfactant composition and preparation method thereof |
| CN103215019A (en) * | 2012-12-17 | 2013-07-24 | 江南大学 | Preparation and applications of surfactant for alcohol amide-sulfate composite type alkali-free oil displacement |
| CN111019620A (en) * | 2019-12-31 | 2020-04-17 | 田春来 | Oil field flowback-free stratum blocking remover and blocking removing method thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480899A (en) * | 2020-12-11 | 2021-03-12 | 德仕能源科技集团股份有限公司 | Demulsification cleanup additive for fracturing and preparation method thereof |
| CN112480899B (en) * | 2020-12-11 | 2022-05-24 | 德仕能源科技集团股份有限公司 | Demulsification and cleanup additive for fracturing and preparation method thereof |
| CN113372246A (en) * | 2021-06-02 | 2021-09-10 | 德仕能源科技集团股份有限公司 | Production and application of surfactant for oil displacement of highly-waxy crude oil |
| CN113372246B (en) * | 2021-06-02 | 2023-08-15 | 德仕能源科技集团股份有限公司 | Production and application of surfactant for oil displacement of high-wax-content crude oil |
| CN115806812A (en) * | 2021-09-14 | 2023-03-17 | 中国石油化工股份有限公司 | Thick oil emulsifying viscosity reducer and preparation method and application thereof |
| CN115806812B (en) * | 2021-09-14 | 2023-10-13 | 中国石油化工股份有限公司 | Viscous oil emulsifying viscosity-reducing agent and preparation method and application thereof |
| CN115785934A (en) * | 2022-12-27 | 2023-03-14 | 江苏棋成化工有限公司 | Heavy alkylbenzene sulfonate oil displacement agent for tertiary oil recovery and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111961457B (en) | 2022-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111961457B (en) | Oil displacement complexing agent for heavy oil reservoir and preparation method and application thereof | |
| CN102952531B (en) | Surfactant for displacing oil of offshore oilfield and preparation method thereof | |
| CN103320104B (en) | A kind of water-in-oil-type biofuel base drilling fluid and preparation method thereof | |
| CN104232045B (en) | Composite surface active agent composition and preparation method and application thereof | |
| CN111826150B (en) | High-temperature-resistant viscosity-reduction oil displacement agent for thick oil steam chemical flooding and preparation method and application thereof | |
| CN103540303B (en) | Composite surfactant composition as well as preparation method thereof | |
| CN111154475B (en) | Oil displacement agent for reducing interfacial tension of high-wax-content crude oil and preparation method and application thereof | |
| CN107118756B (en) | A kind of efficient thick-oil thinner and preparation method thereof | |
| CN104694103A (en) | Surfactant compounded system with oil reservoir adaptability | |
| CN102876313A (en) | Hydrophobically associated polymer-composite surfactant binary combination flooding system and method | |
| CN101642692A (en) | Composite type crude oil demulsifier and preparation method thereof | |
| CN111440604B (en) | Self-demulsification type salt-resistant heavy oil cold recovery oil-displacing agent and preparation method and application thereof | |
| CN107501135B (en) | Preparation and application of sulfonate anionic surfactant containing double long-chain alkyl | |
| CN103666434B (en) | A kind of high temperature resistant heavy crude heat extraction compound oil displacement agent | |
| CN103540305B (en) | Surfactant composition for chemical displacement of reservoir oil and preparation method thereof | |
| US4371444A (en) | Process for secondary recovery | |
| CN113136190A (en) | Thickened oil viscosity reduction oil displacement agent with profile control and flooding performance and preparation method thereof | |
| CN111073622B (en) | Surfactant composition for improving recovery ratio and preparation method and application thereof | |
| CN112280547A (en) | Viscosity-reducing oil displacement agent for super-thick crude oil and preparation method and application thereof | |
| CN117903080A (en) | Thickened oil viscosity reducer and preparation method thereof | |
| CN112175597A (en) | Well-flushing foam water shutoff agent and preparation method thereof | |
| CN111088020B (en) | Method for discharging liquid and producing gas by adopting salt-resistant oil-resistant solid foam drainage agent composition | |
| CN103666411A (en) | Compound oil base emulsifier containing fatty alcohol polyoxyethylene polypropylene ether sulfonate and preparation method of compound oil base emulsifier | |
| CN103540306A (en) | Surfactant composition for tertiary oil recovery and preparation method thereof | |
| CN114085171A (en) | Surfactant for natural gas hydrate clean fracturing fluid and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |