CN114605977A - Oil-mud water swelling suspension profile control solution and preparation method thereof - Google Patents
Oil-mud water swelling suspension profile control solution and preparation method thereof Download PDFInfo
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- CN114605977A CN114605977A CN202011447658.9A CN202011447658A CN114605977A CN 114605977 A CN114605977 A CN 114605977A CN 202011447658 A CN202011447658 A CN 202011447658A CN 114605977 A CN114605977 A CN 114605977A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 239000000725 suspension Substances 0.000 title claims abstract description 94
- 230000008961 swelling Effects 0.000 title claims abstract description 85
- 238000002360 preparation method Methods 0.000 title abstract description 17
- 239000010802 sludge Substances 0.000 claims abstract description 127
- 239000003921 oil Substances 0.000 claims abstract description 125
- 239000002245 particle Substances 0.000 claims abstract description 66
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 54
- 239000010779 crude oil Substances 0.000 claims abstract description 52
- 239000004094 surface-active agent Substances 0.000 claims abstract description 46
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 32
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 32
- -1 polydimethylsiloxane Polymers 0.000 claims abstract description 32
- 229940057995 liquid paraffin Drugs 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims description 64
- 238000006243 chemical reaction Methods 0.000 claims description 58
- 238000000034 method Methods 0.000 claims description 15
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 11
- 230000008014 freezing Effects 0.000 claims description 10
- 238000007710 freezing Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 7
- HVUMOYIDDBPOLL-XWVZOOPGSA-N Sorbitan monostearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XWVZOOPGSA-N 0.000 claims description 6
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims description 5
- 238000007792 addition Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000002283 diesel fuel Substances 0.000 claims description 4
- 229940075507 glyceryl monostearate Drugs 0.000 claims description 3
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 claims description 3
- BOWVQLFMWHZBEF-KTKRTIGZSA-N oleoyl ethanolamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)NCCO BOWVQLFMWHZBEF-KTKRTIGZSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 21
- 239000000243 solution Substances 0.000 description 70
- 230000035699 permeability Effects 0.000 description 12
- 238000012360 testing method Methods 0.000 description 10
- 229920000642 polymer Polymers 0.000 description 8
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 125000005250 alkyl acrylate group Chemical group 0.000 description 2
- 230000005465 channeling Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 description 1
- VEPKQEUBKLEPRA-UHFFFAOYSA-N VX-745 Chemical compound FC1=CC(F)=CC=C1SC1=NN2C=NC(=O)C(C=3C(=CC=CC=3Cl)Cl)=C2C=C1 VEPKQEUBKLEPRA-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003225 biodiesel Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910000281 calcium bentonite Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012674 dispersion polymerization Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- PBOSTUDLECTMNL-UHFFFAOYSA-N lauryl acrylate Chemical compound CCCCCCCCCCCCOC(=O)C=C PBOSTUDLECTMNL-UHFFFAOYSA-N 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- FSAJWMJJORKPKS-UHFFFAOYSA-N octadecyl prop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C=C FSAJWMJJORKPKS-UHFFFAOYSA-N 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XZHNPVKXBNDGJD-UHFFFAOYSA-N tetradecyl prop-2-enoate Chemical compound CCCCCCCCCCCCCCOC(=O)C=C XZHNPVKXBNDGJD-UHFFFAOYSA-N 0.000 description 1
- 239000007762 w/o emulsion Substances 0.000 description 1
Classifications
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- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses an oil sludge water-swelling suspension profile control solution and a preparation method thereof, wherein the oil sludge water-swelling suspension profile control solution comprises the following components in parts by weight: 3-5 parts of crude oil; 3-5 parts of water swelling particle profile control agent; 0.03 to 0.3 portion of polydimethylsiloxane; 0.03 to 0.3 portion of surfactant; 3-5 parts of oil sludge. Because the oil sludge is adopted to replace liquid paraffin, the cost can be obviously reduced, and the oil sludge which is difficult to treat in the oil field is consumed. The oil sludge has a certain profile control effect, and after the oil sludge is used for replacing liquid paraffin, the profile control effect of the oil sludge water-swelling suspension profile control solution provided by the embodiment of the invention can be improved.
Description
Technical Field
The invention relates to the field of petrochemical industry, in particular to an oil sludge water swelling suspension profile control solution and a preparation method thereof.
Background
Wells in the field that produce oil directly are called production wells, and wells that are used to inject water into the formation to increase or stabilize the production of the well are called injection wells. Generally, after water enters a stratum from a water injection well, oil in the stratum is driven to flow to a production well. However, during the water injection development process, due to some factors, the water injected into the water injection well can rapidly flow to the oil well along the flow channeling channel (also called as a large pore channel and a high permeability zone), so that the oil displacement efficiency is low, and the oil well produces less oil and more water. To address this problem, water channeling is typically plugged by injecting a profile control agent into the formation through an injection well. If the injected profile control agent also has the function of oil displacement, the profile control agent can be called as a profile control agent.
Currently common profile control agents include: the gel profile control agent is a polymer solution, the viscosity of the gel profile control agent is usually more than 20mPa.s and much more than the viscosity of water of 1.0mPa.s, and the gel profile control agent is difficult to be injected into a low-permeability oil reservoir in a deep part. The precipitation type profile control agent is a true solution when injected into a stratum, does not contain particles, has the same viscosity as water, is favorable for being injected into the stratum, and gradually generates precipitates after injection, thereby playing a profile control effect. The particle profile control agent is mainly a water-swelling particle profile control agent, also called water-swelling polymer particles, pre-crosslinked particles, swelling particles, polymer microspheres and the like, and is widely used in oil fields. Because all the profile control and profile control construction sites are in the field, the water swelling particle profile control agent with the diameter of less than 100 mu m can raise dust due to wind when in use, which is not beneficial to the health of personnel and also can pollute the environment, and is limited by site conditions, the water swelling particle profile control agent with the diameter of less than 100 mu m is difficult to be uniformly stirred when being added into water, and the water swelling particle profile control agent cannot be automatically dosed by a dosing pump like a liquid agent.
In the prior art, nano and submicron water swelling suspension or emulsion is synthesized by emulsion polymerization or dispersion polymerization, which needs to use organic solvents such as liquid paraffin and the like; or directly grinding the water-swelling particles to a required fineness and then dispersing the water-swelling particles into an organic solvent such as liquid paraffin and the like. However, the above methods all use organic solvents such as liquid paraffin, which significantly increases the construction cost.
Disclosure of Invention
In view of the above, the present invention provides an oil sludge water swelling suspension profile control solution and a preparation method thereof, which can solve the above technical problems.
Specifically, the method comprises the following technical scheme:
on one hand, the embodiment of the invention provides an oily sludge-water swelling suspension profile control solution which comprises the following components in parts by weight: 3-5 parts of crude oil;
3-5 parts of water swelling particle profile control agent;
0.03 to 0.3 portion of polydimethylsiloxane;
0.03 to 0.3 portion of surfactant;
3-5 parts of oil sludge.
In some possible implementations, the crude oil is selected from at least one of light crude oil, diesel oil, liquid paraffin having a freezing point of less than-10 ℃.
In some possible implementations, the water swellable particulate profile control agent has a particle size of less than 1000 μm.
In some possible implementations, the surfactant is selected from at least one of glyceryl monostearate, span 60, span 80, oleic acid monoethanolamide.
In some possible implementations, the oil sludge has a particle size of less than 50 μm and an oil content of 5% to 50%.
On the other hand, the embodiment of the invention also provides a preparation method of any one of the above-mentioned oily sludge water swelling suspension profile control solutions, and the preparation method comprises the following steps:
adding crude oil into a reaction kettle according to the weight fractions of the components in the oil sludge water swelling suspension profile control solution, continuously adding polydimethylsiloxane and a surfactant into the reaction kettle under the stirring condition, uniformly stirring, continuously adding a water swelling particle profile control agent into the reaction kettle, and continuously uniformly stirring;
after stirring is stopped, standing for a set time at a set temperature to enable the water-swellable particle profile control agent to adsorb the crude oil, the polydimethylsiloxane and the surfactant;
and starting stirring again, adding oil sludge into the reaction kettle for multiple times, and stirring uniformly to obtain the oil sludge water-swellable suspension profile control solution.
In some possible implementations, the crude oil is added to the reaction kettle such that the internal temperature of the reaction kettle is greater than 0 ℃ and less than 30 ℃.
In some possible implementations, the stirring speed is set to 180 rpm to 220 rpm while adding the polydimethylsiloxane and the surfactant to the reaction kettle.
In some possible implementations, the agitation speed is set to be 400 rpm to 600 rpm when the sludge is added to the reaction tank in multiple portions.
In some possible implementations, the two consecutive additions of the sludge are separated by a time period of 8 minutes to 12 minutes, and the viscosity of the suspension system in the reaction kettle is measured after each addition of the sludge to the reaction kettle, such that the viscosity of the sludge water-swellable suspension profile control solution is 50 centipoise to 500 centipoise.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the oil sludge water swelling suspension profile control solution provided by the embodiment of the invention can obtain a good profile control effect through the synergistic compounding effect of the components in parts by weight. On the basis, the oil sludge is adopted to replace liquid paraffin, so that the cost can be obviously reduced, and the oil sludge which is difficult to treat in the oil field is consumed. The oil sludge has a certain profile control effect, and compared with the prior art, the profile control effect of the oil sludge water-swelling suspension profile control solution provided by the embodiment of the invention can be improved after the oil sludge replaces liquid paraffin.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail.
On one hand, the embodiment of the invention provides an oily sludge water-swelling suspension profile control solution which comprises the following components in parts by weight: 3-5 parts of crude oil;
3-5 parts of a water-swelling particle profile control agent;
0.03 to 0.3 portion of polydimethylsiloxane;
0.03 to 0.3 portion of surfactant;
3-5 parts of oil sludge.
Illustratively, the parts by weight of the crude oil include, but are not limited to: 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, and the like.
The water-swelling particle profile control agent comprises the following components in parts by weight: 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, and the like.
The parts by weight of polydimethylsiloxane include, but are not limited to: 0.03 parts by weight, 0.05 parts by weight, 0.08 parts by weight, 0.1 parts by weight, 0.15 parts by weight, 0.2 parts by weight, 0.25 parts by weight, 0.3 parts by weight, and the like.
The weight parts of the surfactant include but are not limited to: 0.03 parts by weight, 0.05 parts by weight, 0.08 parts by weight, 0.1 parts by weight, 0.15 parts by weight, 0.2 parts by weight, 0.25 parts by weight, 0.3 parts by weight, and the like.
The parts by weight of the oil sludge include but are not limited to: 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, and the like.
The oil sludge water swelling suspension profile control solution provided by the embodiment of the invention can obtain a good profile control effect through the synergistic compounding effect of the components in parts by weight. On the basis, the oil sludge is adopted to replace liquid paraffin, so that the cost can be obviously reduced, and the oil sludge which is difficult to treat in the oil field is consumed. The oil sludge has a certain profile control effect, and compared with the prior art, the profile control effect of the oil sludge water-swelling suspension profile control solution provided by the embodiment of the invention can be improved after the oil sludge replaces liquid paraffin.
It can be understood that oil sludge produced by the oil field is solid waste which is difficult to treat by the oil field, and the accumulation of the oil sludge brings pressure to the production and environmental protection of the oil field. According to the embodiment of the invention, the oil sludge water swelling suspension is prepared by using the oil sludge liquid paraffin and other organic solvents, so that the oil sludge treatment is more beneficial, and a good profile control effect is obtained.
In some possible implementations, to enhance the profile control effect of the sludge-water swellable suspension profile control solution, the crude oil is selected from at least one of light crude oil having a freezing point of less than-10 ℃, diesel oil, and liquid paraffin.
For example, crude oil is light crude oil having a viscosity of 1 centipoise to 50 centipoise at 25 ℃ and a freezing point of less than-10 ℃, and such light crude oil is usually produced in each oil field. The crude oil can also be commercial 10# diesel oil, or liquid paraffin with freezing point less than-10 ℃ and biodiesel.
The water-swelling granular profile control agent, also called water-swelling profile control agent, is granular solid powder, which is common in the field, and the water-swelling profile control agent which is conventionally used in the field can be applied to the invention. For example, a temperature-resistant salt-resistant pre-crosslinked water-swellable profile control agent ZL-1 known in the art, or a water-swellable particle profile control agent prepared by the following method:
the preparation raw materials comprise the following components in percentage by mass: 20 to 50 percent of acrylamide; 4-15% of calcium bentonite; 5-10% of alkyl acrylate; 0.1-0.5% of sodium persulfate or potassium persulfate; 0.1-0.5% of N, N-methylene bisacrylamide and the balance of deionized water.
Alkyl acrylates include, but are not limited to: dodecyl acrylate, tetradecyl acrylate, hexadecyl acrylate, octadecyl acrylate.
Based on the preparation raw materials, the preparation method of the water-swelling profile control agent is as follows:
mixing raw materials: mixing all the raw materials together in a common open mixing tank according to a proportion; the mixing time is not less than 30 minutes, and the mixing temperature is lower than 35 ℃;
polymerization: pumping the mixed raw material mixture into a polymerization reaction kettle, heating to 70-80 ℃, simultaneously vacuumizing for 20 minutes, and introducing nitrogen for 1 hour; after the materials are polymerized, keeping the temperature for 12 to 18 hours at 70 to 80 ℃;
crushing: injecting compressed air from the top of the reaction kettle by using an air compressor, extruding the polymerized massive water-swelling body out of the reaction kettle, and crushing the massive water-swelling body to the required particle size by using a rubber crusher.
In some possible implementations, to improve the profile control effect of the sludge water-swellable suspension profile control solution, the water-swellable particle profile control agent has a particle size of less than 1000 μm.
At least 95% or more of the particles are ensured to have a diameter of less than 1000. mu.m. For example, a Raymond mill or a ball mill can be used to grind the conventional water-swelling profile control agent to the particle diameter below 1000 μm. Or, the water-swelling material can be directly customized and ground to be water-swelling material with the diameter of less than 1000 μm by the existing water-swelling material manufacturers. The conventional water-swelling profile control and flooding agent can also be ground to be less than 1000 mu m in diameter by adopting a laboratory ball mill.
In some possible implementations, to enhance the profile control effect of the sludge-water swellable suspension profile control solution, the surfactant is selected from at least one of glyceryl monostearate, span 60, span 80, oleic acid monoethanolamide.
Surfactants of the above-mentioned kind have an HLB value of between 3 and 8, which is advantageous for the formation of surfactants for water-in-oil emulsion systems.
In some possible implementations, to improve the profile control effect of the sludge water-swellable suspension profile control solution, the particle size of the sludge is less than 50 μm, and the oil content of the sludge is 5% -50%.
The oil sludge provided by the embodiment of the invention is also called oil-containing sludge, for example, tank bottom oil sludge from an oil field combined treatment station and oil refining chemical industry enterprises, and is black viscous liquid or paste with water-in-oil covered sludge.
The polydimethylsiloxane has the viscosity of 1000-5000 centipoises at 25 ℃, plays a role in coupling and defoaming, and can synergistically reduce the interfacial tension.
On the other hand, an embodiment of the present invention further provides a preparation method of any one of the above oil sludge water swelling suspension profile control solutions, including:
adding crude oil into a reaction kettle according to the weight fractions of the components in the oil sludge water swelling suspension profile control solution, continuously adding polydimethylsiloxane and a surfactant into the reaction kettle under the stirring condition, uniformly stirring, continuously adding a water swelling particle profile control agent into the reaction kettle, and continuously uniformly stirring.
And after stopping stirring, standing for a set time at a set temperature to enable the water-swellable particle profile control agent to adsorb the crude oil, the polydimethylsiloxane and the surfactant.
And starting stirring again, adding the oil sludge into the reaction kettle for multiple times, and uniformly stirring to obtain the oil sludge-water swelling suspension profile control solution.
By using the method, the oily sludge-water swelling suspension profile control solution which is uniform in texture and fully mixed can be obtained, and the profile control effect of the oily sludge-water swelling suspension profile control solution is further ensured.
In some possible implementations, the crude oil is added to the reaction kettle such that the internal temperature of the reaction kettle is greater than 0 ℃ and less than 30 ℃, thereby making it easier for the crude oil to disperse and dissolve.
In some possible implementations, the stirring speed is set to 180 rpm to 220 rpm, such as 180 rpm, 190 rpm, 200 rpm, 210 rpm, 220 rpm, and the like, while adding the polydimethylsiloxane and the surfactant to the reaction tank.
In some possible implementations, the agitation speed is set to be 400 rpm to 600 rpm, such as 400 rpm, 450 rpm, 500 rpm, 550 rpm, 600 rpm, etc., when the sludge is added to the reaction tank in multiple portions.
Further, the interval time between two adjacent times of adding the oil sludge is 8 minutes to 12 minutes, such as 8 minutes, 9 minutes, 10 minutes, 11 minutes and the like. And after the oil sludge is added into the reaction kettle once, measuring the viscosity of a suspension system in the reaction kettle so as to enable the viscosity of the oil sludge water swelling suspension profile control solution to be 50-500 centipoises.
Through the design, the oil sludge is fully dissolved in the oil sludge water swelling suspension profile control solution, so that the water swelling particle profile control agent is fully dispersed, and the oil sludge water swelling suspension profile control solution with uniform texture is obtained.
In some possible implementations, the specific operation steps of the preparation method of the sludge-water swelling suspension profile control system provided by the embodiment of the present invention may be as follows:
adding the crude oil into a reaction kettle at the ambient temperature of more than 0 ℃ (if the ambient temperature is less than 0 ℃, equipment and materials need to be heated to 0-30 ℃).
Starting stirring, keeping the stirring speed at 180-220 r/min, then adding polydimethylsiloxane and surfactant into the reaction kettle, and stirring for 10-15 min.
And continuously adding the water swelling particle profile control agent into the reaction kettle, continuously stirring for 1-1.5 hours, stopping stirring, and standing at constant temperature for 24 hours, so that the water swelling particles fully adsorb polydimethylsiloxane, the surfactant and the crude oil and become oleophilic.
And (3) continuing to start stirring, wherein the stirring speed is 400-600 rpm, and adding the oil sludge into the reaction kettle for multiple times, for example, 5 times, wherein 1/5 mass of oil sludge is added every time, and the interval is 8-12 minutes. After oil sludge is added into the reaction kettle once, the viscosity of a suspension system in the reaction kettle is measured, so that the viscosity of the oil sludge water swelling suspension profile control solution is 50-500 centipoises.
The invention will be further described below by means of specific examples, in each of which mD is the unit of permeability, given in hadamard; PV is the pore volume, e.g., the pore space that can accommodate the injected fluid after the sand pack has been filled with sand.
Example 1
The embodiment 1 provides an oily sludge water swelling suspension profile control solution, which comprises the following components in parts by weight: 30 g of crude oil; 30 g of water swelling particle profile control agent; 0.3 g of polydimethylsiloxane; 0.6 g of surfactant; 30 g of oil sludge.
Wherein the crude oil is selected from crude oil produced in Hongkong oil fields in the Gangxi region, and has a viscosity of 20 centipoise at 25 ℃ and a freezing point of-12 ℃; the particle size of the water swelling particle profile control agent is less than 1 mm; the surfactant includes: 0.3 g of glycerin monostearate and 0.3 g of span 60 surfactant; the oil sludge is produced by a combined treatment station in the harbor and west areas of the Hongkong oilfield, the particle size is less than 50 mu m, and the oil content is 15 percent.
The preparation steps of the sludge-water swelling suspension profile control solution provided in this example 1 are as follows:
(1) crude oil was added to the reaction kettle at an ambient temperature of 10 ℃. Starting stirring, keeping the stirring speed at 200 rpm, then adding polydimethylsiloxane and a surfactant into the reaction kettle, and stirring for 10 minutes.
(2) And (3) continuously adding the water swelling particle profile control agent into the reaction kettle, continuously stirring for 1 hour, stopping stirring, and standing at a constant temperature for 24 hours to ensure that the water swelling particles become oleophilic after fully adsorbing the polydimethylsiloxane, the surfactant and the crude oil.
(3) Stirring is started, the stirring speed is 400 rpm, 5 batches of oil sludge are added into the reaction kettle, 1/5 mass of oil sludge is added each time, the interval time between two adjacent times of adding the oil sludge is 10 minutes, the viscosity of the suspension is measured in each batch, and when the viscosity reaches 100 centipoises, the oil sludge is stopped being added, so that the oil sludge water-swellable suspension profile control solution is obtained.
The profile control performance of the sludge-water swelling suspension profile control solution provided in this example 1 was tested, and the test process was as follows:
simulating low-permeability stratum conditions, and simulating the plugging performance of the oily sludge-water swelling suspension profile control solution by using a rock core flow tester, wherein the test result shows that: for the core with the permeability of 500mD, after 2PV of the oily sludge water swelling suspension profile control solution is injected, the core permeability is reduced by 75%, and therefore, the core obtains a good plugging effect by using the oily sludge water swelling suspension profile control solution provided by the embodiment.
In addition, the amount of the sludge-water swellable suspension profile control solution provided in this example was reduced by at least 50% compared to the amount of polymer gel typically used in the profile control of the prior art, while achieving comparable results.
Example 2
The embodiment 2 provides an oily sludge water swelling suspension profile control solution, which comprises the following components in parts by weight: 300 g of crude oil; 300 g of water-swelling particle profile control agent; 5 g of polydimethylsiloxane; 10 g of surfactant; 500 g of oil sludge.
Wherein the crude oil is selected from crude oil produced in Hongkong oil fields in the Gangxi region, and has a viscosity of 20 centipoise at 25 ℃ and a freezing point of-12 ℃; the particle size of the water swelling particle profile control agent is less than 1 mm; the surfactant includes: 5 g of glycerin monostearate and 5 g of span 80 surfactant; the oil sludge is produced by a combined treatment station in the harbor and west areas of the Hongkong oilfield, the particle size is less than 50 mu m, and the oil content is 15 percent.
The preparation steps of the sludge-water swelling suspension profile control solution provided in this example 2 are as follows:
(1) crude oil was added to the reaction kettle at ambient temperature of 20 ℃. Starting stirring, keeping the stirring speed at 220 rpm, then adding polydimethylsiloxane and a surfactant into the reaction kettle, and stirring for 10 minutes.
(2) And (3) continuously adding the water swelling particle profile control agent into the reaction kettle, continuously stirring for 1 hour, stopping stirring, and standing at a constant temperature for 24 hours to ensure that the water swelling particles become oleophilic after fully adsorbing the polydimethylsiloxane, the surfactant and the crude oil.
(3) Stirring is started, the stirring speed is 500 rpm, 5 batches of oil sludge are added into the reaction kettle, 1/5 mass of oil sludge is added each time, the interval time between two adjacent times of adding the oil sludge is 11 minutes, the viscosity of the suspension is measured in each batch, and when the viscosity reaches 200 centipoises, the oil sludge is stopped being added, so that the oil sludge water-swellable suspension profile control solution is obtained.
The profile control performance of the sludge-water swelling suspension profile control solution provided in this example 2 was tested, and the test process was as follows:
simulating low-permeability stratum conditions, and simulating the plugging performance of the oily sludge-water swelling suspension profile control solution by using a rock core flow tester, wherein the test result shows that: for a core with a permeability of 650mD, after 2PV of the sludge water swelling suspension profile control solution is injected, the core permeability is reduced by 77%, and therefore, by using the sludge water swelling suspension profile control solution provided by the embodiment, the core obtains a good plugging effect.
In addition, the amount of the sludge-water swellable suspension profile control solution provided in this example was reduced by at least 50% compared to the amount of polymer gel typically used in the profile control of the prior art, while achieving comparable results.
Example 3
The embodiment 3 provides an oily sludge water swelling suspension profile control solution, which comprises the following components in parts by weight: 500 g of crude oil; 500 g of water swelling particle profile control agent; 10 g of polydimethylsiloxane; 15 g of surfactant; 500 g of oil sludge.
Wherein the crude oil is selected from crude oil produced in Hongkong oil fields in the Gangxi region, and has a viscosity of 20 centipoise at 25 ℃ and a freezing point of-12 ℃; the particle size of the water swelling particle profile control agent is less than 1 mm; the surfactant includes: 10 g of glycerin monostearate and 5 g of span 60 surfactant; the oil sludge is produced by a combined treatment station in the harbor and west areas of the Hongkong oilfield, the particle size is less than 50 mu m, and the oil content is 15 percent.
The preparation steps of the sludge-water swelling suspension profile control solution provided in this example 3 are as follows:
(1) crude oil was added to the reaction kettle at an ambient temperature of 10 ℃. Starting stirring, keeping the stirring speed at 180 revolutions per minute, then adding polydimethylsiloxane and a surfactant into the reaction kettle, and stirring for 15 minutes.
(2) And (3) continuously adding the water swelling particle profile control agent into the reaction kettle, continuously stirring for 1 hour, stopping stirring, and standing at a constant temperature for 24 hours to ensure that the water swelling particles become oleophilic after fully adsorbing the polydimethylsiloxane, the surfactant and the crude oil.
(3) Stirring is started, the stirring speed is 500 rpm, 5 batches of oil sludge are added into the reaction kettle, 1/5 mass of oil sludge is added each time, the interval time between two adjacent times of adding the oil sludge is 10 minutes, the viscosity of the suspension is measured in each batch, and when the viscosity reaches 300 centipoises, the oil sludge is stopped being added, so that the oil sludge water-swellable suspension profile control solution is obtained.
The profile control performance of the sludge-water swelling suspension profile control solution provided in this example 3 was tested, and the test process was as follows:
simulating low-permeability stratum conditions, and simulating the plugging performance of the oily sludge-water swelling suspension profile control solution by using a rock core flow tester, wherein the test result shows that: for a core with a permeability of 750mD, after 2PV of the sludge water swelling suspension profile control solution is injected, the core permeability is reduced by 78%, and therefore, by using the sludge water swelling suspension profile control solution provided by the embodiment, the core obtains a good plugging effect.
In addition, the amount of the sludge-water swellable suspension profile control solution provided in this example was reduced by at least 50% compared to the amount of polymer gel typically used in the profile control of the prior art, while achieving comparable results.
Example 4
The embodiment 4 provides an oily sludge water swelling suspension profile control solution, which comprises the following components in parts by weight: 350 g of crude oil; 400 g of water swelling particle profile control agent; 10 g of polydimethylsiloxane; 5 g of surfactant; 300 g of oil sludge.
Wherein the crude oil is selected from crude oil produced in Hongkong oil fields, Hongkong oil field, and has a viscosity of 20 centipoise at 25 deg.C and a freezing point of-12 deg.C; the particle size of the water swelling particle profile control agent is less than 1 mm; the surfactant includes: 3 g of glycerin monostearate and 2 g of span 80 surfactant; the oil sludge is produced by a combined treatment station in the harbor and west areas of the Hongkong oilfield, the particle size is less than 50 mu m, and the oil content is 15 percent.
The preparation steps of the sludge-water swelling suspension profile control solution provided in this example 4 are as follows:
(1) crude oil was added to the reaction kettle at an ambient temperature of 10 ℃. Starting stirring, keeping the stirring speed at 200 rpm, then adding polydimethylsiloxane and a surfactant into the reaction kettle, and stirring for 10 minutes.
(2) And (3) continuously adding the water swelling particle profile control agent into the reaction kettle, continuously stirring for 1 hour, stopping stirring, and standing at a constant temperature for 24 hours to ensure that the water swelling particles become oleophilic after fully adsorbing the polydimethylsiloxane, the surfactant and the crude oil.
(3) Stirring is started, the stirring speed is 400 rpm, oil sludge is added into the reaction kettle in 5 batches, 1/5 mass of oil sludge is added each time, the interval time between two adjacent times of adding the oil sludge is 10 minutes, the viscosity of the suspension liquid is measured in each batch, and when the viscosity reaches 400 centipoises, the addition of the oil sludge is stopped, so that the oil sludge water-swelling suspension profile control solution is obtained.
The profile control performance of the sludge-water swelling suspension profile control solution provided in this example 4 was tested, and the test process was as follows:
simulating low-permeability stratum conditions, and simulating the plugging performance of the oily sludge-water swelling suspension profile control solution by using a rock core flow tester, wherein the test result shows that: for a core with a permeability of 850mD, after injecting a 2PV sludge-water swelling suspension profile control solution, the core permeability is reduced by 77.5%, and thus, by using the sludge-water swelling suspension profile control solution provided by this embodiment, a good plugging effect is obtained for the core.
In addition, the amount of the sludge-water swellable suspension profile control solution provided in this example was reduced by at least 50% compared to the amount of polymer gel typically used in the profile control of the prior art, while achieving comparable results.
Example 5
This embodiment 5 provides an oil sludge water swelling suspension profile control solution, which includes the following components in parts by weight: 450 g of crude oil; 350 g of water-swelling granular profile control agent; 15 g of polydimethylsiloxane; 20 g of surfactant; 400 g of oil sludge.
Wherein the crude oil is selected from crude oil produced in Hongkong oil fields in the Gangxi region, and has a viscosity of 20 centipoise at 25 ℃ and a freezing point of-12 ℃; the particle size of the water swelling particle profile control agent is less than 1 mm; the surfactant includes: 10 g of glycerin monostearate and 10 g of span 60 surfactant; the oil sludge is produced by a combined treatment station in the harbor and west areas of the Hongkong oilfield, the particle size is less than 50 mu m, and the oil content is 15 percent.
The preparation steps of the sludge-water swelling suspension profile control solution provided in this example 5 are as follows:
(1) crude oil was added to the reaction kettle at an ambient temperature of 10 ℃. Starting stirring, keeping the stirring speed at 200 rpm, then adding polydimethylsiloxane and a surfactant into the reaction kettle, and stirring for 10 minutes.
(2) And (3) continuously adding the water swelling particle profile control agent into the reaction kettle, continuously stirring for 1 hour, stopping stirring, and standing at a constant temperature for 24 hours to ensure that the water swelling particles become oleophilic after fully adsorbing the polydimethylsiloxane, the surfactant and the crude oil.
(3) Stirring is started, the stirring speed is 400 rpm, 5 batches of oil sludge are added into the reaction kettle, 1/5 mass of oil sludge is added each time, the interval time between two adjacent times of adding the oil sludge is 10 minutes, the viscosity of the suspension is measured in each batch, and when the viscosity reaches 100 centipoises, the oil sludge is stopped being added, so that the oil sludge water-swellable suspension profile control solution is obtained.
The profile control performance of the sludge-water swelling suspension profile control solution provided in this example 5 was tested, and the test process was as follows:
simulating low-permeability stratum conditions, and simulating the plugging performance of the oily sludge-water swelling suspension profile control solution by using a rock core flow tester, wherein the test result shows that: for the core with the permeability of 450mD, after 2PV of the oily sludge water swelling suspension profile control solution is injected, the core permeability is reduced by 78%, and therefore, the core obtains a good blocking effect by using the oily sludge water swelling suspension profile control solution provided by the embodiment.
In addition, the amount of the sludge-water swellable suspension profile control solution provided in this example was reduced by at least 50% compared to the amount of polymer gel typically used in the profile control of the prior art, while achieving comparable results.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The oily sludge water swelling suspension profile control solution is characterized by comprising the following components in parts by weight: 3-5 parts of crude oil;
3-5 parts of water swelling particle profile control agent;
0.03 to 0.3 portion of polydimethylsiloxane;
0.03 to 0.3 portion of surfactant;
3-5 parts of oil sludge.
2. The sludge water bulking suspension profile control solution of claim 1, wherein said crude oil is selected from at least one of light crude oil, diesel oil, liquid paraffin having a freezing point less than-10 ℃.
3. The sludge water-swellable suspension profile control solution of claim 1, wherein the water-swellable particle profile control agent has a particle size of less than 1000 μm.
4. The sludge water bulking suspension profile control solution of claim 1, wherein the surfactant is selected from at least one of glyceryl monostearate, span 60, span 80, oleic acid monoethanolamide.
5. The sludge water-swellable suspension profile control solution of any one of claims 1 to 4, wherein the sludge has a particle size of less than 50 μm and an oil content of 5% to 50%.
6. The process for preparing a sludge water bulking suspension profile modifying solution of any one of claims 1 to 5, wherein the process comprises:
adding crude oil into a reaction kettle according to the weight fractions of the components in the oil sludge water swelling suspension profile control solution, continuously adding polydimethylsiloxane and a surfactant into the reaction kettle under the stirring condition, uniformly stirring, continuously adding a water swelling particle profile control agent into the reaction kettle, and continuously uniformly stirring;
after stirring is stopped, standing for a set time at a set temperature to enable the water-swellable particle profile control agent to adsorb the crude oil, the polydimethylsiloxane and the surfactant;
and starting stirring again, adding oil sludge into the reaction kettle for multiple times, and stirring uniformly to obtain the oil sludge water-swellable suspension profile control solution.
7. The method of preparing a sludge water bulking suspension profile control solution of claim 6, wherein the internal temperature of the reaction kettle is greater than 0 ℃ and less than 30 ℃ when the crude oil is added to the reaction kettle.
8. The method for preparing a sludge water swelling suspension profile control solution according to claim 6, wherein the stirring speed is set to 180 to 220 rpm when adding polydimethylsiloxane and surfactant to the reaction kettle.
9. The method of preparing a sludge-water swellable suspension profile control solution according to claim 6, wherein the stirring speed is set to 400 to 600 rpm when the sludge is added to the reaction tank in several portions.
10. The method of claim 6, wherein the time interval between two consecutive additions of the oil sludge is 8 minutes to 12 minutes, and the viscosity of the suspension system in the reaction kettle is measured after each addition of the oil sludge to the reaction kettle, such that the viscosity of the oil sludge water-swellable suspension profile control solution is 50 centipoise to 500 centipoise.
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