CN113549441A - Preparation method of automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer for oil extraction - Google Patents
Preparation method of automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer for oil extraction Download PDFInfo
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract 13
- 238000009792 diffusion process Methods 0.000 title claims abstract 8
- 238000000605 extraction Methods 0.000 title claims abstract 4
- 238000002360 preparation method Methods 0.000 title claims abstract 4
- 239000004094 surface-active agent Substances 0.000 claims abstract 15
- 239000003921 oil Substances 0.000 claims abstract 11
- 238000010438 heat treatment Methods 0.000 claims abstract 8
- 239000002280 amphoteric surfactant Substances 0.000 claims abstract 5
- 239000004064 cosurfactant Substances 0.000 claims abstract 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract 5
- 239000000194 fatty acid Substances 0.000 claims abstract 5
- 229930195729 fatty acid Natural products 0.000 claims abstract 5
- 150000004665 fatty acids Chemical class 0.000 claims abstract 5
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims abstract 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract 4
- 239000010703 silicon Substances 0.000 claims abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract 3
- 238000002156 mixing Methods 0.000 claims abstract 2
- 238000011084 recovery Methods 0.000 claims 7
- 238000003756 stirring Methods 0.000 claims 7
- 238000000034 method Methods 0.000 claims 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims 4
- 229920000570 polyether Polymers 0.000 claims 4
- 239000007788 liquid Substances 0.000 claims 3
- 229920002545 silicone oil Polymers 0.000 claims 3
- ONYHQNURMVNRJZ-QXMHVHEDSA-N 3-[3-[[(Z)-docos-13-enoyl]amino]propyl-dimethylazaniumyl]-2-hydroxypropane-1-sulfonate Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC(O)CS([O-])(=O)=O ONYHQNURMVNRJZ-QXMHVHEDSA-N 0.000 claims 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims 2
- WOWHHFRSBJGXCM-UHFFFAOYSA-M cetyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+](C)(C)C WOWHHFRSBJGXCM-UHFFFAOYSA-M 0.000 claims 2
- 238000001816 cooling Methods 0.000 claims 2
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 2
- 239000003208 petroleum Substances 0.000 claims 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims 2
- 238000007789 sealing Methods 0.000 claims 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 2
- GEGGDDNVHQPTCS-QXMHVHEDSA-N 2-[3-[[(z)-docos-13-enoyl]amino]propyl-dimethylazaniumyl]acetate Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC([O-])=O GEGGDDNVHQPTCS-QXMHVHEDSA-N 0.000 claims 1
- ZKWJQNCOTNUNMF-QXMHVHEDSA-N 2-[dimethyl-[3-[[(z)-octadec-9-enoyl]amino]propyl]azaniumyl]acetate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)NCCC[N+](C)(C)CC([O-])=O ZKWJQNCOTNUNMF-QXMHVHEDSA-N 0.000 claims 1
- 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 1
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims 1
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 claims 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims 1
- 238000004090 dissolution Methods 0.000 claims 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims 1
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 claims 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229940083542 sodium Drugs 0.000 claims 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims 1
- 230000001502 supplementing effect Effects 0.000 claims 1
- 239000010779 crude oil Substances 0.000 abstract 3
- 239000003129 oil well Substances 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 125000000524 functional group Chemical group 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 239000011435 rock Substances 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
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- 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
- C09K8/584—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 surfactants
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
- C09K8/604—Polymeric surfactants
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- 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
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Abstract
The invention discloses a preparation method of an automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer for oil extraction, which comprises the following steps: mixing a silicon surfactant, a quaternary ammonium salt surfactant, a fatty acid surfactant, a amphoteric surfactant and a cosurfactant, heating to 70-80 ℃, and reacting for 3-5 hours to obtain a complex; adding cosurfactant such as alcohol into the obtained complex, heating to 70-80 ℃, and preserving heat for 1-2 hours to obtain the composite. After the agent enters an oil well and a stratum, the intermolecular automatic directional arrangement and adsorption effect occur. Adsorbing on the surface layer of rock and automatically arranging in order. The amphiphilic molecule functional group adsorbed on the uppermost layer is quickly diffused into the crude oil, so that the heavy components of the crude oil which are gathered together are diffused into fine oil drops to enter water. Greatly reduces the viscosity of the crude oil, increases the fluidity and improves the oil well yield.
Description
Technical Field
The application relates to the technical field of oil field chemicals, in particular to a preparation method of an automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer for oil extraction.
Background
At present, the domestic thick oil is wide in distribution and high in storage quantity. The oil reservoir has the characteristics of large crude oil viscosity, active edge bottom water and larger development difficulty.
Thermal oil recovery is the leading recovery mode of heavy oil, but for super heavy oil reservoirs and thin-layer heavy oil reservoirs, the diffusion efficiency of steam in the oil reservoir is low due to high crude oil viscosity and poor seepage capability. Resulting in high steam injection pressure, thin oil layer, high heat dissipation capacity and low heat utilization rate. The prior art is difficult to realize the economic and effective exploitation of the thin-layer heavy oil reservoir.
Meanwhile, the heavy oil reservoir development has the following problems: firstly, the oil production peak period of the pumping transfer well is short, and the production stability difficulty is high; secondly, the low-grade thick oil is subjected to steam injection thermal recovery, the cycle oil yield is low, and the cycle time is short; and thirdly, the viscosity of crude oil in a scattered well of a conventional unit part is higher, and the conventional exploitation difficulty is high.
The method reduces the production cost of the thickened oil, improves the economic benefit, and is one of important research subjects of oil fields to the international market. The novel functional chemical viscosity reduction technology which has the viscosity reduction function on the thickened oil and can increase the viscosity of the displacement fluid is urgently developed.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the traditional thick oil thermal recovery technology can not meet the requirements of thick oil recovery. Therefore, the self-arranging rapid-diffusion amphiphilic molecule viscosity reducer for oil extraction is developed, the viscosity of crude oil can be effectively reduced, and the yield of a heavy oil well is increased. The oil extraction system of the automatic-arrangement fast-diffusion amphiphilic molecule viscosity reducer for oil extraction provided by the invention can effectively reduce the viscosity of heavy oil and extra-ultra heavy oil and promote the efficient and economic development of heavy oil reservoirs.
The preparation method of the automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer for oil recovery comprises the following steps,
(1) mixing a silicon surfactant, a quaternary ammonium salt surfactant, a fatty acid surfactant, a amphoteric surfactant and a cosurfactant, heating to 70-80 ℃, and reacting for 3-5 hours to obtain a complex.
(2) And adding cosurfactant such as alcohol and the like into the obtained complex, heating to 70-80 ℃, and preserving heat for 1-2 hours to obtain viscous liquid, namely the viscosity reducer for the oil extraction with the automatic arrangement and rapid diffusion amphiphilic molecules.
Specifically, the silicon surfactant in the step (1) is one or a mixture of polyether modified silicone oil, polyether amino co-modified silicone oil and polyether modified siloxane, and the adding amount of the silicon surfactant is 13-20% of the total mass.
Specifically, the quaternary ammonium salt surfactant in the step (1) is one or more of dodecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride and dodecyl dimethyl benzyl ammonium chloride, and the adding amount of the quaternary ammonium salt surfactant is 9-15% of the total mass.
Specifically, the fatty acid surfactant in the step (1) is one or more of sodium oleate, sodium dodecyl benzene sulfonate and petroleum sodium sulfonate, and the adding amount of the fatty acid surfactant is 5-16% of the total mass
Specifically, the amphoteric surfactant in the step (1) is one or a mixture of more of erucamidopropyl betaine, oleamidopropyl betaine, erucamidopropyl hydroxysultaine and the like, and the adding amount of the amphoteric surfactant is 10-27% of the total mass.
Specifically, the cosurfactant in the step (2) is one or more of propanol, isopropanol, n-butanol and isobutanol, and the adding amount of the cosurfactant is 20-25% of the total mass.
For the invention, the step sequence is important, and the water solubility of different types of active agents is mainly considered, wherein the silicon agent and the quaternary ammonium salt active agent are somewhat pasty liquids, the solubility is poor, if other active agents are added, the viscosity of the solution is increased, the dissolution and dispersion of the surface active agent are influenced, and the reaction time is prolonged. Therefore, the preferred steps of the present invention are: adding a certain amount of water into a reaction kettle, starting stirring slurry, adding a measured amount of silicon surfactant into the reaction kettle, uniformly stirring, adding a measured amount of quaternary ammonium salt surfactant, fatty acid surfactant and amphoteric surfactant, uniformly stirring, sealing a feed inlet of the reaction kettle, heating to 70-80 ℃, and reacting at constant temperature for 3-5 hours. And after the reaction is finished, obtaining a milky-white to faint yellow complex, cooling, adding a certain amount of cosurfactant alcohol into the kettle after the temperature is reduced to normal temperature, continuously heating to 70-80 ℃, and reacting for 1-2 hours to obtain viscous liquid.
The reaction speed can be accelerated by increasing the temperature. During the production process, the liquid can be evaporated due to overhigh temperature. The production conditions are poor and the cost is increased. In addition, several active agents can intertwine and chelate with each other. The reaction time is short and the interaction is insufficient, so that the application performance is lowered. Experiments prove that the reaction is carried out at 70-80 ℃ for 3-5 hours as the optimal reaction condition.
Because different surfactants have different charges and are combined with each other. Can generate directional adsorption and can be orderly arranged on the surface of the rock. And automatic and rapid diffusion is generated. Therefore, the choice of the components is also important for the present invention. Through experimental comparison, the best scheme of the invention is as follows: adding water into a reaction kettle: 15%, starting the stirrer; sequentially adding 16% of polyether amino modified silicone oil; and 10% hexadecyltrimethylammonium chloride; after complete dissolution; adding petroleum sulfonate 8%; erucamidopropylhydroxysultaine 24%; heating to 70 ℃ by closing the feeding port, and reacting for 4 hours to obtain the prepolymer. Stopping stirring, opening the feeding hole, and cooling to normal temperature. Isopropanol was added at 20%. Starting stirring, heating the kettle to 80 ℃, stirring and reacting for 1 hour, and then adding 7 percent of clean water. A viscous liquid is obtained. Namely the viscosity reducer which is the product and is used for oil extraction and can automatically arrange and rapidly diffuse amphiphilic molecules.
Has the advantages that: the preparation method of the automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer for oil extraction provided by the invention has the advantages of simplicity in operation, safety and no toxicity.
The viscosity reducer with the automatic arrangement and rapid diffusion amphipathic molecules for oil extraction prepared according to the provided preparation method has the following characteristics:
the viscosity reducing performance to the thick oil is good, and the viscosity of the thick oil can be reduced by 98% when the using concentration is 0.1%.
After being prepared into an aqueous solution, the water-soluble polymer can be automatically adsorbed on the surface of crude oil and quickly diffused to form an oil-in-water emulsion. The crude oil aggregate is dispersed into tiny oil droplets to be diffused into the formation water, the fluid viscosity is greatly reduced, and the crude oil flow is improved. Thereby reducing the viscosity of the thick oil.
After the viscosity reducer is prepared into an aqueous solution by the aid of the automatic-arrangement fast-dispersion amphiphilic molecule viscosity reducer, the aqueous solution is subjected to layer-to-layer adsorption on the surface of rock, and the viscosity reducer is automatically arranged to change the wettability of the rock, so that the hydrophilicity of the rock is enhanced, and water displacement is facilitated;
after entering formation fluid, the viscosity reducer quickly diffuses automatically arranged and quickly diffused amphiphilic molecules, so that the oil-water interfacial tension is greatly reduced. The oil washing capacity is greatly enhanced.
The aqueous solution formed by the viscosity reducer with the automatically arranged and rapidly diffused amphiphilic molecules has higher viscosity and elasticity, and can increase the water flooding efficiency.
The aqueous solution formed by the viscosity reducer with the amphiphilic molecules capable of automatically arranging and rapidly diffusing has strong salt tolerance, and still has good viscosity reducing effect when the mineralization degree is 90,000 mg/L.
The aqueous solution formed by the viscosity reducer can be automatically arranged and quickly diffused, so that the clay mineral in the stratum can be prevented from being hydrated and expanded, and the crude oil demulsification is not influenced. The oil well equipment is not corroded;
the aqueous solution formed by the viscosity reducer is automatically arranged and rapidly diffused and is suitable for the temperature of 30-350 ℃.
Drawings
FIG. 1 is a graph of the diffusion process described in example 6.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments.
The present invention will be described in detail with reference to specific examples, which are not intended to limit the scope of the present invention.
Examples 1 to 5 are a preparation using an auto-arranging fast-diffusing amphiphilic molecule viscosity reducer, and performance evaluation and application of products prepared in examples 6 to 11 were performed.
Example 1
(1) At 1m3Stainless steel reaction kettle200kg of clear water is added, stirring is started, 160.0kg of polyether modified silicone oil, 150.0kg of dodecyl trimethyl ammonium chloride, 50.0kg of sodium oleate, 50.0kg of petroleum sulfonate and 100.0kg of erucamide propyl betaine are added under stirring. The feed inlet was closed, heated to 75 ℃ and reacted for 4 hours until the liquid was viscous to milky white. And obtaining a prepolymer.
(2) Stopping stirring, opening the feeding hole, and cooling to normal temperature. 100Kg of isopropanol was added. The n-butanol 100kg. is started to be stirred, the temperature in the kettle is raised to 80 ℃, the stirring reaction is carried out for 1 hour, and then 90kg of clear water is added. A viscous liquid is obtained. The product, namely the automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer A for oil extraction.
Example 2
(1) At 1m3150kg of clear water is added into a stainless steel reaction kettle, stirring is started, 160.0kg of polyether amino modified silicone oil, 100.0kg of hexadecyl trimethyl ammonium chloride, 80.0g of petroleum sulfonate and 240.0kg of erucamide propyl hydroxysulfobetaine are added under stirring, a closed charging opening is heated to 70 ℃, and the reaction is carried out for 4 hours until the liquid is viscous to milk white. And obtaining a prepolymer.
(2) Stopping stirring, opening the feeding hole, and cooling to normal temperature. 200Kg of isopropanol was added. Starting stirring, heating the kettle to 80 ℃, stirring and reacting for 1 hour, and then adding 70kg of clear water. A viscous liquid is obtained. Namely the product, the self-aligned fast-diffusing amphiphilic molecule B for oil extraction.
Example 3
(1) At 1m3200kg of clear water is added into a stainless steel reaction kettle, stirring is started, 200.0kg of polyether modified siloxane, 150.0kg of dodecyl dimethyl benzyl ammonium chloride, 50.0g of dodecyl benzene sulfonate and 150.0kg of oleamide propyl betaine are added under stirring, a closed charging opening is heated to 80 ℃, and the reaction is carried out for 3 hours until the liquid is viscous to milk white. And obtaining a prepolymer.
(2) Stopping stirring, opening the feeding hole, and cooling to normal temperature. 200Kg of isobutanol is added. Starting stirring, heating the kettle to 80 ℃, and stirring for reaction for 1 hour. Then 50kg of clean water is added. A viscous liquid is obtained. Namely the viscosity reducer C of the product, which is used for oil extraction and is automatically arranged and rapidly diffused with amphiphilic molecules.
Example 4
(1) At 1m3200kg of clear water is added into a stainless steel reaction kettle, stirring is started, 130.0kg of trisiloxane surfactant, 90.0kg of hexadecyl trimethyl ammonium chloride, 110.0g of dodecyl benzene sulfonate and 270.0kg of erucamide propyl hydroxysulfobetaine are added under stirring, a closed feeding port is heated to 70 ℃, and the reaction is carried out for 3 hours until the liquid is viscous to milk white. And obtaining a prepolymer.
(2) Stopping stirring, opening the feeding hole, and cooling to normal temperature. 200.0Kg of isopropanol was added. Starting stirring, heating the kettle to 80 ℃, and stirring for reaction for 1 hour. A viscous liquid is obtained. Namely the product, namely the automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer D for oil extraction.
Example 5
(1) At 1m3200kg of clear water is added into a stainless steel reaction kettle, stirring is started, 80.0kg of polyether modified siloxane, 120.0kg of polyether amino co-modified silicone oil, 110.0kg of hexadecyl trimethyl ammonium chloride, 50.0kg of sodium oleate, 40.0kg of dodecyl benzene sulfonate and 150.0kg of oleamide propyl hydroxysulfobetaine are added under stirring, a closed charging opening is heated to 80 ℃, and the reaction is carried out for 4 hours until the liquid is viscous to milk white. And obtaining a prepolymer.
(2) Stopping stirring, opening the feeding hole, and cooling to normal temperature. 250Kg of isobutanol was added. Starting stirring, heating the kettle to 70 ℃, and stirring for reaction for 1 hour. A viscous liquid is obtained. Namely the product, namely the automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer E for oil extraction.
Example 6
The silicon hydroxyl groups and the quaternary ammonium groups are adsorbed and automatically arranged on the surface of the rock. Quaternary ammonium groups, carboxylic acid groups, and hydroxyl groups are solubilizing groups of the molecule; after molecules are adsorbed on the surfaces of pores through the automatic layer-layer arrangement effect, functional groups quickly diffuse into thick oil after crude oil flows, and then the thick oil is diffused into tiny oil drops, so that the viscosity of the fluid is greatly reduced, and the fluidity is greatly increased.
As shown in fig. 1. In the figure, the a state is: the oil-water calm interface before diffusion is not arranged. The b state is as follows: the diffused oil droplets begin to form. The state c is as follows: oil droplets form and diffuse into the water. In the whole process, stirring is not needed, and the crude oil can automatically diffuse into water and finally completely diffuse into the medicament. The purpose of reducing the viscosity of crude oil is achieved.
Example 7
The viscosity reducer with the automatically arranged and rapidly diffused amphiphilic molecules has a high-efficiency viscosity reduction effect on thick oil under high salinity. And (3) taking the oil field thick oil, wherein the viscosity of the oil field thick oil is 9, 280mPa.s, the mineralization degree of the oil field thick oil is 132, 000mg/L, adding the automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer to prepare 1, 000mg/L, and reducing the viscosity to 176.6 mPa.s. The viscosity reduction rate reaches 98 percent. And (3) taking the oil field thick oil, wherein the viscosity of the oil field thick oil is 74, 240mPa.s, the mineralization degree of the oil field thick oil is 81, 200mg/L, adding the automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer to prepare 1, 100mg/L, and reducing the viscosity to 290 mPa.s. The viscosity reduction rate reaches 99 percent.
The viscosity reduction rate of the agent is still kept above 90% at the temperature of 350 ℃.
Example 8
Preparing the viscosity reducer into 1, 000mg/L aqueous solution, and collecting the thick oil with interfacial tension of 4.64 × 10-2mN/m. When the concentration is 2,000 mg/L, the interfacial tension is 4.45X 10-2mN/m. Therefore, the capability of the automatically-arranged and rapidly-diffused amphiphilic molecule viscosity reducer system for reducing the interfacial tension between oil and water is strong, so that the oil washing capability is greatly enhanced.
And carrying out experiments by adopting a sand filling pipe oil displacement model, an oil sample and a water sample. The main process of oil displacement: firstly, saturating saline water in a rock core, then saturating crude oil in the rock core, wherein the oil saturation of the rock core is 74-75%, the displacement temperature is 50 ℃, the viscosity of the crude oil is 198mPa.s (50 ℃), then displacing oil with water until the water content reaches 98%, then injecting an aqueous solution of an oil extraction system, and finally displacing oil until the water content reaches 98% again, thus finishing the experiment. The result proves that the final displacement efficiency of the system reaches 63 percent, which is greatly superior to the polymer flooding and the ternary combination flooding adopted in the current oil field. The oil washing efficiency is high.
Example 9
The produced sewage is matched with the thick oil for cold production: the 17-horizontal 22 well is a horizontal well, the jet-opened well section is 1014.43-1239.04m, the viscosity of crude oil is 2, 023.2mPa.s, the formation temperature is 44.88 ℃, the formation static pressure is 4.42MPa, and the day liquid before measure2.4t, 1.6t daily oil and 33.3 percent water, preparing 0.3 percent of self-arranging rapid-diffusing amphiphilic molecule viscosity reducer solution by produced water, and injecting the solution into a container with the thickness of 200m3. After the measures, the peak daily liquid is 6.3t, the daily oil is 4.1t, the water content is 34.9 percent, the oil is increased by 549.7t, and the effective period reaches more than 6 months.
Example 10
Viscosity reduction and huff and puff of a single well of a water-drive heavy oil well: a well. Basic conditions are as follows: viscosity of crude oil: 3009 mPa.s. Well section: 1283.9-1300.8 m; permeability: 1.6 μm-2(ii) a Porosity: 35.56 percent. There are problems: the crude oil has high viscosity, poor flow capacity in an oil layer and blockage in a near-wellbore region of the oil layer. The technical measures are adopted: viscosity reduction (automatic arrangement rapid diffusion amphiphilic molecule oil extraction system aqueous solution 300 m)3) And the wire-wound screen pipe is used for preventing sand. After the measure, the average daily liquid increase is 19.51m3Average daily oil gain is 3.47 tons. The effective period is 9 months.
Example 11
Viscosity reduction auxiliary steam huff and puff: a well. Basic conditions are as follows: the well shooting open section is 234.5-247m, and has 2 layers of 10-meter crude oil viscosity 529 and 800mPa.s (20 ℃) and crude oil viscosity 12800mPa.s (50 ℃), so that the stratum is shallow in burial, the stratum temperature is low, and the crude oil viscosity is high. Before the measures, 4 periods of steam injection are accumulated, the 4 th period produces 40 days, the period produces 32 tons of oil and 235 tons of water. 6 months in 2017, injecting an automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer for matching with 1200m3Steam stimulation, after measures, daily liquid production is controlled to be 8.0t, daily oil production is controlled to be 7.52t, 130t of oil production is accumulated in five months, and the production effect is obviously better than that of the previous period.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application.
Claims (8)
1. A preparation method of an automatic-arrangement rapid-diffusion amphiphilic molecule viscosity reducer for oil extraction is characterized by comprising the following steps: the following steps are carried out,
(1) mixing a silicon surfactant, a quaternary ammonium salt surfactant, a fatty acid surfactant, a amphoteric surfactant and a cosurfactant, heating to 70-80 ℃, and reacting for 3-5 hours to obtain a complex; (2) and adding cosurfactant such as alcohol and the like into the obtained complex, heating to 70-80 ℃, and preserving heat for 1-2 hours to obtain viscous liquid, namely the viscosity reducer for the oil extraction with the automatic arrangement and rapid diffusion amphiphilic molecules.
2. The preparation method of the viscosity reducer of amphiphilic molecules with automatic arrangement and rapid diffusion for oil recovery according to claim 1, wherein the silicon surfactant in step (1) is one or a mixture of polyether modified silicone oil, polyether amino co-modified silicone oil and polyether modified siloxane, and the addition amount is 13-20% of the total mass.
3. The method for preparing the viscosity reducer of amphiphilic molecules with automatic arrangement and rapid diffusion for oil recovery according to claim 1, wherein the quaternary ammonium salt surfactant in the step (1) is one or more of dodecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride and dodecyl dimethyl benzyl ammonium chloride, and the addition amount of the quaternary ammonium salt surfactant is 9-15% of the total mass.
4. The method for preparing the viscosity reducer of amphiphilic molecules with automatic arrangement and rapid diffusion for oil recovery according to claim 1, wherein the fatty acid surfactant in the step (1) is one or more of sodium oleate, sodium dodecyl benzene sulfonate and sodium petroleum sulfonate, and the dosage of the fatty acid surfactant is 5-16% of the total mass.
5. The method for preparing the viscosity reducer of the amphiphilic molecules with the automatic arrangement and the rapid diffusion for oil recovery as claimed in claim 1, wherein the amphoteric surfactant in the step (1) is one or a mixture of erucamidopropyl betaine, oleamidopropyl betaine, erucamidopropyl hydroxysultaine and the like, and the adding amount of the amphoteric surfactant is 10% -27% of the total mass.
6. The method for preparing the viscosity reducer of the auto-arranging fast-diffusing amphiphilic molecule for oil recovery as claimed in claim 1, wherein the co-surfactant in step (2) is one or more of propanol, isopropanol, n-butanol and isobutanol, and the addition amount thereof is 20-25% of the total mass.
7. The method for preparing the viscosity reducer of the self-aligned fast-diffusing amphiphilic molecule for oil recovery as claimed in claim 1, comprising the steps of:
adding a certain amount of water into a reaction kettle, starting stirring, adding a measured amount of silicon surfactant into the kettle, uniformly stirring, adding a measured amount of quaternary ammonium salt surfactant, fatty acid surfactant and amphoteric surfactant, uniformly stirring, sealing a feed inlet of the reaction kettle, heating to 70-80 ℃, reacting at a constant temperature for 3-5 hours, obtaining a prepolymer after the reaction is finished, cooling to normal temperature, adding a certain amount of cosurfactant alcohol into the kettle, continuously heating to 70-80 ℃, and reacting for 1-2 hours to obtain viscous liquid, namely the viscosity reducer.
8. The method for preparing the viscosity reducer of the self-aligned fast-diffusing amphiphilic molecule for oil recovery as claimed in claim 1, comprising the steps of:
adding water into a reaction kettle: 15%, starting stirring; sequentially adding 16% of polyether amino modified silicone oil; and 10% hexadecyltrimethylammonium chloride; after complete dissolution; adding petroleum sulfonate 8%; erucamidopropylhydroxysultaine 24%; sealing the feeding port, heating to 70 ℃, reacting for 4 hours to obtain a prepolymer, stopping stirring, opening the feeding hole, cooling to normal temperature, adding 20% of isopropanol, starting stirring, heating to 80 ℃ in the kettle, stirring for reacting for 1 hour, and supplementing 7% of clear water to obtain a viscous liquid, namely the viscosity reducer.
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Application publication date: 20211026 |