CN117551231B - Plugging material for oil-increasing and water-plugging oil-water well and preparation method thereof - Google Patents
Plugging material for oil-increasing and water-plugging oil-water well and preparation method thereof Download PDFInfo
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- CN117551231B CN117551231B CN202410038117.2A CN202410038117A CN117551231B CN 117551231 B CN117551231 B CN 117551231B CN 202410038117 A CN202410038117 A CN 202410038117A CN 117551231 B CN117551231 B CN 117551231B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000000463 material Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 103
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 27
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 23
- 229920000642 polymer Polymers 0.000 claims abstract description 23
- BMFMTNROJASFBW-UHFFFAOYSA-N 2-(furan-2-ylmethylsulfinyl)acetic acid Chemical compound OC(=O)CS(=O)CC1=CC=CO1 BMFMTNROJASFBW-UHFFFAOYSA-N 0.000 claims abstract description 21
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 18
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 18
- OSSNTDFYBPYIEC-UHFFFAOYSA-N 1-ethenylimidazole Chemical compound C=CN1C=CN=C1 OSSNTDFYBPYIEC-UHFFFAOYSA-N 0.000 claims abstract description 17
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003999 initiator Substances 0.000 claims abstract description 12
- 239000003381 stabilizer Substances 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 36
- 239000000243 solution Substances 0.000 claims description 31
- 238000002156 mixing Methods 0.000 claims description 30
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 27
- 239000000377 silicon dioxide Substances 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 25
- 239000008367 deionised water Substances 0.000 claims description 23
- 229910021641 deionized water Inorganic materials 0.000 claims description 23
- 239000002105 nanoparticle Substances 0.000 claims description 20
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 claims description 12
- 239000002244 precipitate Substances 0.000 claims description 12
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 9
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 7
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 7
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 7
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- GOQYKNQRPGWPLP-UHFFFAOYSA-N n-heptadecyl alcohol Natural products CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 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 claims description 4
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 4
- 229960000541 cetyl alcohol Drugs 0.000 claims description 3
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 239000012286 potassium permanganate Substances 0.000 claims description 2
- BQFYGYJPBUKISI-UHFFFAOYSA-N potassium;oxido(dioxo)vanadium Chemical compound [K+].[O-][V](=O)=O BQFYGYJPBUKISI-UHFFFAOYSA-N 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 2
- 238000004132 cross linking Methods 0.000 abstract description 10
- 150000002500 ions Chemical class 0.000 abstract description 10
- 239000002245 particle Substances 0.000 abstract description 8
- RNIHAPSVIGPAFF-UHFFFAOYSA-N Acrylamide-acrylic acid resin Chemical compound NC(=O)C=C.OC(=O)C=C RNIHAPSVIGPAFF-UHFFFAOYSA-N 0.000 abstract description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 abstract description 4
- 238000006116 polymerization reaction Methods 0.000 abstract description 4
- 230000008961 swelling Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 25
- 230000000903 blocking effect Effects 0.000 description 13
- 239000008398 formation water Substances 0.000 description 13
- 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 9
- 239000011734 sodium Substances 0.000 description 9
- 229910052708 sodium Inorganic materials 0.000 description 9
- 238000005303 weighing Methods 0.000 description 9
- VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 8
- 238000011049 filling Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 239000011435 rock Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 229920006037 cross link polymer Polymers 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 125000002883 imidazolyl group Chemical group 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052901 montmorillonite Inorganic materials 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000015784 hyperosmotic salinity response Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F120/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/04—Acids; Metal salts or ammonium salts thereof
- C08F120/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F292/00—Macromolecular compounds obtained by polymerising monomers on to inorganic materials
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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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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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
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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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
- C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses an oil-increasing water-plugging oil-water well plugging material and a preparation method thereof, belonging to the technical field of oil exploitation, wherein the plugging material comprises the following components in parts by weight: 90-120 parts of acrylic acid, 30-50 parts of acrylamide, 15-20 parts of N-vinylimidazole, 6.5-8.5 parts of initiator, 15-30 parts of zinc methacrylate, 2-5 parts of stabilizer and 10-15 parts of modified nano silicon dioxide. According to the invention, the N-vinylimidazole is added into the acrylic acid-acrylamide gel to carry out polymerization reaction, the N atom is taken as an ion crosslinking site, zinc methacrylate is introduced to carry out ion crosslinking, the compatibility of double bond modified nano silicon dioxide particles in the polymer is improved, the mechanical property of the plugging material after swelling can be obviously improved, the plugging material is not easy to disintegrate, and the plugging property is improved.
Description
Technical Field
The invention belongs to the technical field of petroleum exploitation, and particularly relates to an oil-increasing water-plugging oil-water well plugging material and a preparation method thereof.
Background
The stratum rock consists of multiple mineral components, montmorillonite is one of the most main components of the shale, the montmorillonite has higher hydration expansion row, when drilling fluid is injected into the well, the montmorillonite in the shale absorbs water to generate hydration expansion dispersion, expansion pressure is generated on the well wall rock, well wall necking is easy to occur, the rock strength is reduced, and well wall instability is caused; the main components of part of shale comprise chlorite, which is easy to disintegrate and peel off from the rock stratum after absorbing water, thereby causing the collapse of the well wall; illite is one of stratum rock as long as the mineral has porosity and fissure, the cementing degree is weak, the injection of drilling fluid easily causes further diffusion of rock cracks, the well wall is peeled off and blocked, and even the well wall is collapsed; after the water injection development oil field enters the middle-high water-containing period, the dominant seepage channel in the reservoir is enlarged, injected water is diffused to the oil well along the dominant seepage channel, so that the water quantity is increased and the oil yield is reduced, in this case, the adopted plugging agent is mainly a crosslinked polymer gel plugging material, is injected into the stratum before gel formation, and forms gel after the crosslinking reaction, so that the purpose of plugging the dominant seepage channel is achieved; the pre-crosslinked polymer gel seals the dominant seepage channel after swelling by water absorption, so that the pre-crosslinked polymer gel is not easily influenced by shearing action; in the prior art, after the pre-crosslinked polymer gel swells after absorbing water, the crosslinked structure of the polymer gel is unstable under the action of water molecules, and the polymer gel is easy to damage to cause structural disintegration, so that the blocking performance is reduced.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides an oil-increasing water-blocking oil-water well plugging material and a preparation method thereof, and in order to solve the problem of stability of a cross-linking structure, the invention provides a method for adding N-vinylimidazole into acrylic acid-acrylamide gel for polymerization reaction, taking N atoms as ion cross-linking sites, introducing zinc methacrylate for ion cross-linking, improving the compatibility of double bond modified nano silicon dioxide particles in a polymer, obviously improving the mechanical property of the plugging material after swelling, being difficult to disintegrate and improving the plugging property.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the invention provides an oil-increasing water-blocking oil-water well plugging material, which comprises the following components in parts by weight: 90-120 parts of acrylic acid, 30-50 parts of acrylamide, 15-20 parts of N-vinylimidazole, 6.5-8.5 parts of initiator, 15-30 parts of zinc methacrylate, 2-5 parts of stabilizer and 10-15 parts of modified nano silicon dioxide;
preferably, the initiator comprises at least one of ammonium persulfate, sodium persulfate, potassium permanganate, potassium vanadate and sodium bisulfite;
preferably, the stabilizer comprises at least one of stearyl alcohol and cetyl alcohol;
preferably, the preparation method of the modified nano silicon dioxide specifically comprises the following steps:
(1) adding triethanolamine and cetyltrimethylammonium bromide into deionized water, stirring until the mixture is uniformly dispersed, adding tetraethoxysilane, stirring at 150-180rpm for 2-4 hours at 60-80 ℃, cooling a reaction system to room temperature after the reaction is finished, centrifuging at 5000-8000rpm for 15-25min, removing supernatant, washing precipitates, and drying to obtain silica nanoparticles;
(2) dispersing the silica nanoparticles prepared in the step (1) in ethanol solution, placing the ethanol solution on a magnetic stirrer, stirring at a rotating speed of 150-180rpm for 10-20min, adding KH570 solution, stirring at normal temperature for 60-80h, cooling the reaction system to room temperature, centrifuging at 8000-10000rpm for 5-10min, collecting precipitate, washing, and drying to obtain modified nano-silica;
preferably, in step (1), the mass ratio between the triethanolamine and cetyltrimethylammonium bromide is 1:3-5;
preferably, in the step (1), the mass concentration of the triethanolamine is 3-5g/L;
preferably, in the step (1), the mass fraction of the tetraethoxysilane in deionized water is 10-20%;
preferably, in step (2), the mass concentration of the silica nanoparticles in the ethanol solution is 20-30g/L; the volume fraction of the ethanol solution is 75%;
preferably, in step (2), the KH570 is added in an amount of 1-5% of the mass of the silica nanoparticles;
preferably, in the step (2), the KH570 solution is KH570 dissolved in absolute ethanol, and the mass concentration of KH570 in the KH570 solution is 4-8mg/mL.
The invention also provides a preparation method of the oleophobic water shutoff oil-water well shutoff material, which specifically comprises the following steps:
s1, dissolving acrylic acid in deionized water, regulating pH to 6.5-7.0, placing in a nitrogen atmosphere, raising the temperature to 60-70 ℃, adding acrylamide and N-vinylimidazole, uniformly mixing, stirring at a speed of 120-150rpm, dropwise adding an initiator aqueous solution, reacting for 6-8 hours, cooling the reaction system to room temperature, filtering, removing deionized water, and collecting viscous liquid to obtain an AA-AM-VIM polymer;
s2, mixing the AA-AM-VIM polymer prepared in the step S1, gradually adding zinc methacrylate and modified nano silicon dioxide, uniformly mixing, adding dicumyl peroxide, mixing for 10-20min, adding a stabilizer, continuously mixing for 30-40min, keeping the mixing temperature at 50-70 ℃, and after the reaction is completed, reducing the temperature of a reaction system to normal temperature, thus obtaining a plugging material;
preferably, in step S1, the mass concentration of the acrylic acid in deionized water is 0.2-0.3g/mL;
preferably, in the step S1, the mass fraction of the initiator in the aqueous initiator solution is 13-17%;
preferably, in step S2, the added amount of dicumyl peroxide is 2.5-5% of zinc methacrylate.
The beneficial effects obtained by the invention are as follows:
according to the invention, N-vinyl imidazole is added into acrylic acid-acrylamide gel for polymerization reaction, N atoms are taken as ion crosslinking sites, zinc methacrylate is introduced for ion crosslinking, and double bond modified nano silicon dioxide particles are improved in compatibility in a polymer, so that the mechanical property of the plugging material after swelling can be obviously improved, disintegration is not easy to occur, and the plugging property is improved; the N-vinyl imidazole, the acrylic acid and the acrylamide are subjected to polymerization reaction to obtain a polymer containing N atoms, zinc methacrylate can be subjected to homopolymerization reaction under the initiation of peroxide to form a nano-network structure, a large number of ion pairs exist between the polymerized zinc methacrylate and the AA-AM-VIM polymer, the ion interaction is stronger, the ion crosslinking of the gel polymer is formed, larger ion clusters are further formed, and the variability of a gel molecular chain structure is limited; the compatibility of the double bond modified nano silicon dioxide particles in the polymer is better, a complex cross-linking structure can be formed under the action of an initiator, and the dispersibility of the silicon dioxide nano particles is more uniform when the nano silicon dioxide particles are mixed with the AA-AM-VIM polymer, so that the phenomenon of nonuniform polymer strength caused by agglomeration of the silicon dioxide nano particles is avoided; the plugging material prepared by the invention takes acrylic acid and acrylamide as gel matrixes, has hydrophilicity, can enter into an dominant permeation channel, and achieves high-efficiency plugging performance after water absorption.
Drawings
FIG. 1 is an SEM image of a plugging agent prepared according to example 1;
FIG. 2 shows the stability performance results of the plugging materials prepared in the examples and comparative examples of the present invention in formation water and sodium chloride-formation water;
FIG. 3 is a graph showing the results of blocking properties of blocking materials prepared in examples and comparative examples of the present invention.
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, any methods and materials similar or equivalent to those described herein can be used in the present invention. The preferred methods and materials described herein are illustrative only and should not be construed as limiting the scope of the present application.
The experimental methods in the following examples are all conventional methods unless otherwise specified; the test materials and test strains used in the examples described below, unless otherwise specified, were commercially available.
Example 1
The plugging material for the oil-increasing water-plugging oil-water well comprises the following components in parts by weight: 100 parts of acrylic acid, 30 parts of acrylamide, 15 parts of N-vinylimidazole, 6.5 parts of ammonium persulfate, 20 parts of zinc methacrylate, 3.5 parts of stearyl alcohol and 10 parts of modified nano silicon dioxide;
the preparation method of the modified nano silicon dioxide specifically comprises the following steps:
(1) accurately weighing 0.3g of triethanolamine and 1.2g of cetyltrimethylammonium bromide, adding into 100mL of deionized water, stirring until the mixture is uniformly dispersed, adding 15g of tetraethoxysilane, stirring at 150rpm for 4 hours at 60 ℃, cooling a reaction system to room temperature after the reaction is finished, centrifuging at 5000rpm for 25min, removing the supernatant, washing the precipitate, and drying to obtain silica nanoparticles;
(2) dispersing the silica nanoparticles prepared in the step (1) in 600mL of ethanol solution (75 v%), placing on a magnetic stirrer, stirring at 180rpm for 10min, weighing 0.24g KH570 to dissolve in 30mL of absolute ethanol, slowly adding into the silica nanoparticle dispersion, stirring at normal temperature for 60h, centrifuging at 8000rpm for 10min after the reaction system is cooled to room temperature, collecting precipitate, washing, and drying to obtain modified nano silica;
the invention also provides a preparation method of the plugging material for the oil-increasing water-plugging oil-water well, which comprises the following steps:
s1, accurately weighing 100g of acrylic acid, placing the acrylic acid in a flask, adding 500mL of deionized water in a separated manner, adjusting the pH value to 6.5, placing a reaction system in a nitrogen atmosphere, raising the temperature to 60 ℃, adding 30g of acrylamide and 15g of N-vinylimidazole, uniformly mixing, stirring at the speed of 120rpm, dissolving 6.5g of ammonium persulfate in 50mL of deionized water, slowly adding the 50mL of deionized water into the flask, keeping the temperature of 60 ℃ after all ammonium persulfate solution is added, reacting for 7 hours in an anaerobic environment, filtering after the reaction system is cooled to room temperature, removing deionized water, and collecting viscous liquid to obtain an AA-AM-VIM polymer;
s2, mixing the AA-AM-VIM polymer prepared in the step S1, gradually adding 20g of zinc methacrylate and 10g of modified nano silicon dioxide, uniformly mixing, adding 0.5g of dicumyl peroxide, mixing for 10min, adding 3.5g of stearyl alcohol, keeping the mixing temperature at 60 ℃, continuously mixing for 40min, and after the reaction is completed, reducing the temperature of a reaction system to normal temperature to obtain the plugging material.
Example 2
The plugging material for the oil-increasing water-plugging oil-water well comprises the following components in parts by weight: 90 parts of acrylic acid, 45 parts of acrylamide, 18 parts of N-vinylimidazole, 7 parts of sodium persulfate, 15 parts of zinc methacrylate, 2 parts of cetyl alcohol and 15 parts of modified nano silicon dioxide;
the preparation method of the modified nano silicon dioxide specifically comprises the following steps:
(1) accurately weighing 0.5g of triethanolamine and 1.5g of cetyltrimethylammonium bromide, adding into 100mL of deionized water, stirring until the mixture is uniformly dispersed, adding 20g of tetraethoxysilane, stirring at 180rpm for 2 hours at 70 ℃, cooling a reaction system to room temperature after the reaction is finished, centrifuging at 6500rpm for 20min, removing the supernatant, washing the precipitate, and drying to obtain silica nanoparticles;
(2) dispersing the silica nanoparticles prepared in the step (1) in 650mL of ethanol solution (75 v%), placing the solution on a magnetic stirrer, stirring the solution for 10min at a rotation speed of 180rpm, weighing 0.16g KH570 to dissolve the solution in 40mL of absolute ethanol, slowly adding the solution into the silica nanoparticle dispersion, stirring the solution at normal temperature for 60h, centrifuging the solution at 9000rpm for 7min after the reaction system is cooled to room temperature, collecting precipitate, washing the precipitate, and drying the precipitate to obtain modified nano silica;
the invention also provides a preparation method of the plugging material for the oil-increasing water-plugging oil-water well, which comprises the following steps:
s1, accurately weighing 90g of acrylic acid, placing the acrylic acid in a flask, adding 300mL of deionized water in a divided manner, adjusting the pH value to 6.5, placing a reaction system in a nitrogen atmosphere, raising the temperature to 70 ℃, adding 45g of acrylamide and 18g of N-vinylimidazole, uniformly mixing, stirring at the speed of 150rpm, dissolving 7g of sodium persulfate in 50mL of deionized water, slowly adding the solution into the flask, keeping the temperature of 70 ℃ after all the ammonium persulfate solution is added, reacting for 6 hours in an anaerobic environment, after the reaction is completed, cooling the reaction system to room temperature, filtering, removing deionized water, and collecting viscous liquid to obtain an AA-AM-VIM polymer;
s2, mixing the AA-AM-VIM polymer prepared in the step S1, gradually adding 15g of zinc methacrylate and 15g of modified nano silicon dioxide, uniformly mixing, adding 0.45g of dicumyl peroxide, mixing for 20min, adding 2g of hexadecanol, keeping the mixing temperature at 50 ℃, continuing mixing for 40min, and after the reaction is completed, reducing the temperature of a reaction system to normal temperature, thus obtaining the plugging material.
Example 3
The plugging material for the oil-increasing water-plugging oil-water well comprises the following components in parts by weight: 120 parts of acrylic acid, 50 parts of acrylamide, 20 parts of N-vinylimidazole, 8.5 parts of ammonium persulfate, 30 parts of zinc methacrylate, 5 parts of stearyl alcohol and 10 parts of modified nano silicon dioxide;
the preparation method of the modified nano silicon dioxide specifically comprises the following steps:
(1) accurately weighing 0.2g of triethanolamine and 0.8g of cetyltrimethylammonium bromide, adding into 50mL of deionized water, stirring until the mixture is uniformly dispersed, adding 5g of tetraethoxysilane, stirring at 150rpm for 3 hours at 80 ℃, cooling a reaction system to room temperature after the reaction is finished, centrifuging at 8000rpm for 15min, removing the supernatant, washing the precipitate, and drying to obtain silica nanoparticles;
(2) dispersing the silica nanoparticles prepared in the step (1) in 140mL of ethanol solution (75 v%), placing on a magnetic stirrer, stirring at 180rpm for 10min, weighing 0.21g KH570 to dissolve in 35mL of absolute ethanol, slowly adding into the silica nanoparticle dispersion, stirring at normal temperature for 60h, centrifuging at 10000rpm for 5min after the reaction system is cooled to room temperature, collecting precipitate, washing, and drying to obtain modified nano silica;
the invention also provides a preparation method of the plugging material for the oil-increasing water-plugging oil-water well, which comprises the following steps:
s1, accurately weighing 120g of acrylic acid, placing the acrylic acid in a flask, adding 500mL of deionized water in a separated manner, adjusting the pH value to 6.5, placing a reaction system in a nitrogen atmosphere, raising the temperature to 65 ℃, adding 50g of acrylamide and 20g of N-vinylimidazole, uniformly mixing, stirring at the speed of 130rpm, dissolving 8.5g of ammonium persulfate in 50mL of deionized water, slowly adding the solution into the flask, keeping the temperature of 65 ℃ after all the ammonium persulfate solution is added, reacting for 8 hours in an anaerobic environment, filtering after the reaction system is cooled to room temperature, removing deionized water, and collecting viscous liquid to obtain an AA-AM-VIM polymer;
s2, mixing the AA-AM-VIM polymer prepared in the step S1, gradually adding 30g of zinc methacrylate and 10g of modified nano silicon dioxide, uniformly mixing, adding 1.5g of dicumyl peroxide, mixing for 15min, adding 5g of stearyl alcohol, keeping the mixing temperature at 70 ℃, continuing mixing for 30min, and after the reaction is completed, reducing the temperature of a reaction system to normal temperature to obtain the plugging material.
Comparative example 1
This comparative example provides a plugging material and a method for producing the same, which is different from example 1 only in that N-vinylimidazole is not included in all components, and the remaining components and the content of the components are the same as those in example 1.
Comparative example 2
This comparative example provides a plugging material and a method for producing the same, which is different from example 1 only in that zinc methacrylate is not included in all components, and the remaining components and the content of the components are the same as in example 1.
Comparative example 3
This comparative example provides a plugging material and a method for producing the same, which are different from example 1 only in that the silica nanoparticles are not modified in all components, and the remaining components and the content of the components are the same as example 1.
Experimental example 1
In this experimental example, microstructure observation was performed on the plugging material prepared in example 1, the plugging material prepared in example 1 was immersed in water, fully swelled by water absorption, and after the water swelled body of the plugging material was dried in vacuum, the microstructure was observed by using a scanning electron microscope, and fig. 1 is an SEM image of the plugging agent prepared in example 1.
Experimental example 2
The test example is used for testing the salt tolerance of the plugging materials prepared in the examples 1-3 and the comparative examples 1-3, and the specific method is as follows: the plugging materials prepared in the examples and the comparative examples are respectively soaked in sodium chloride-formation water and formation water, wherein the sodium chloride-formation water is prepared by adding 10g/L of sodium chloride into the formation water, and after the plugging materials are fully swelled by water absorption at 60 ℃, the shearing strength of the plugging materials in the two mediums is measured by a volume expansion particle strength shearing instrument.
The following table is the formation water parameters:
。
FIG. 2 is a graph showing the results of stability of the plugging materials prepared in examples and comparative examples in formation water and sodium chloride-formation water, wherein the plugging materials prepared in examples 1-3 have a shear strength between 164 and 168N after fully absorbing water in a formation water environment, and a shear strength between 150 and 153N after fully absorbing water and expanding in a sodium chloride-formation water environment; the plugging material prepared in the comparative example 1 has the shear strength of 156N after fully absorbing water in the stratum water environment, and has the shear strength of 133N after fully absorbing water and expanding in the sodium chloride-stratum water environment; the plugging material prepared in the comparative example 2 has the shear strength of 135N after fully absorbing water in the stratum water environment, and has the shear strength of 108N after fully absorbing water and expanding in the sodium chloride-stratum water environment; the plugging material prepared in the comparative example 3 has the shear strength of 140N after fully absorbing water in the stratum water environment and 123N after fully absorbing water and expanding in the sodium chloride-stratum water environment; the plugging material prepared in comparative example 1 has the lowest shear strength in formation water and sodium chloride-formation water, the plugging material prepared in comparative example 2 does not comprise zinc methacrylate, the lack of zinc methacrylate reduces the complexity of a crosslinked structure of the AA-AM-VIM polymer in the process of forming the plugging material, and meanwhile, the lack of an ionic crosslinked structure formed by zinc ions and imidazole reduces the salt tolerance of the plugging material prepared in comparative example 2; the nano silicon dioxide particles in the comparative example 3 are not modified, so that the dispersibility of the nano silicon dioxide particles in a polymer environment is reduced, and the shearing resistance and the salt resistance of the plugging material are affected.
Experimental example 3
The test example is used for measuring the plugging performance of plugging materials prepared in the example and the comparative example, and the specific method is that 50g of each plugging material prepared in the example and the comparative example is respectively and uniformly mixed with 200g of quartz sand, the mixture is filled into a sand filling pipe, the filling pressure is 6MPa, the sand filling pipe is connected to a multifunctional core displacement simulator, after the mixture is preheated for 2 hours at 60 ℃, stratum water displacement is carried out according to the flow rate of 1mL/min, and the injection pressure is recorded.
FIG. 3 is a graph showing the blocking performance results of the blocking materials prepared in the examples and the comparative examples, wherein the blocking pressure of the sand filling pipe of the blocking materials prepared in the examples 1 to 3 is gradually increased, the injection pressure is increased to about 0.8 to 0.9MPa in 200 to 210min, the injection pressure of the sand filling pipe of the blocking materials prepared in the comparative example 1 is increased to about 0.63MPa in 200min, the injection pressure of the sand filling pipe of the blocking materials prepared in the comparative example 2 is increased to about 0.54MPa in 200min, the injection pressure of the sand filling pipe of the blocking materials prepared in the comparative example 3 is increased to about 0.70MPa in 170min, the blocking performance of the blocking materials prepared in the examples is obviously higher than that of the blocking materials prepared in the comparative examples 1 to 3, the acrylic acid-acrylamide is used as a basic water absorbing material, N-vinylimidazole is introduced into the polyacrylic acid-polyacrylamide for copolymerization to form a VIAa copolymer, the copolymer of VIAa is placed in an imidazole group, the imidazole group is added into the imidazole group, the ionic bond is well absorbed in the imidazole group, the ionic bond is well formed, the ionic bond is well modified, and the ionic bond is well-modified in the silicon dioxide is well, and the ionic bond is well modified, and the ionic bond is capable of improving the ionic bond-modified, and the ionic bond-modified in the three-dimensional structure is further, and the ionic bond-modified is capable of the ionic bond-modified, and the ionic bond-modified is better in the ionic bond-modified.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The invention and its embodiments have been described above with no limitation, and the invention is illustrated in the figures of the accompanying drawings as one of its embodiments, without limitation in practice. In summary, those skilled in the art, having benefit of this disclosure, will appreciate that the invention can be practiced without the specific details disclosed herein.
Claims (9)
1. An oil-increasing water-plugging material for an oil-water well is characterized in that: the plugging material comprises the following components in parts by weight: 90-120 parts of acrylic acid, 30-50 parts of acrylamide, 15-20 parts of N-vinylimidazole, 6.5-8.5 parts of initiator, 15-30 parts of zinc methacrylate, 2-5 parts of stabilizer and 10-15 parts of modified nano silicon dioxide;
the preparation method of the modified nano silicon dioxide specifically comprises the following steps:
(1) adding triethanolamine and cetyltrimethylammonium bromide into deionized water, stirring until the mixture is uniformly dispersed, adding tetraethoxysilane, stirring at 150-180rpm for 2-4 hours at 60-80 ℃, cooling a reaction system to room temperature after the reaction is finished, centrifuging at 5000-8000rpm for 15-25min, removing supernatant, washing precipitates, and drying to obtain silica nanoparticles;
(2) dispersing the silica nanoparticles prepared in the step (1) in ethanol solution, placing the ethanol solution on a magnetic stirrer, stirring at 150-180rpm for 10-20min, adding KH570 solution, stirring at normal temperature for 60-80h, cooling the reaction system to room temperature, centrifuging at 8000-10000rpm for 5-10min, collecting precipitate, washing, and drying to obtain the modified nano-silica.
2. The plugging material for oil-increasing and water-plugging oil-water wells according to claim 1, wherein: the initiator comprises at least one of ammonium persulfate, sodium persulfate, potassium permanganate, potassium vanadate and sodium bisulfite.
3. The plugging material for oil-increasing and water-plugging oil-water wells according to claim 2, wherein: the stabilizer comprises at least one of stearyl alcohol and cetyl alcohol.
4. A method for preparing the plugging material for oil-increasing and water-plugging oil-water wells according to any one of claims 1 to 3, wherein: the method specifically comprises the following steps:
s1, dissolving acrylic acid in deionized water, regulating pH to 6.5-7.0, placing in a nitrogen atmosphere, raising the temperature to 60-70 ℃, adding acrylamide and N-vinylimidazole, uniformly mixing, stirring at a speed of 120-150rpm, dropwise adding an initiator aqueous solution, reacting for 6-8 hours, cooling the reaction system to room temperature, filtering, removing deionized water, and collecting viscous liquid to obtain an AA-AM-VIM polymer;
s2, mixing the AA-AM-VIM polymer prepared in the step S1, gradually adding zinc methacrylate and modified nano silicon dioxide, uniformly mixing, adding dicumyl peroxide, mixing for 10-20min, adding a stabilizer, continuously mixing for 30-40min, keeping the mixing temperature at 50-70 ℃, and after the reaction is completed, reducing the temperature of a reaction system to normal temperature, thus obtaining the plugging material.
5. The preparation method of the plugging material for the oil-increasing water-plugging oil-water well, which is disclosed in claim 4, is characterized in that: in the step S1, the mass concentration of the acrylic acid in deionized water is 0.2-0.3g/mL.
6. The preparation method of the plugging material for the oil-increasing water-plugging oil-water well, which is disclosed in claim 5, is characterized in that: in the step S1, the mass fraction of the initiator in the aqueous initiator solution is 13-17%.
7. The method for preparing the plugging material for the oil-increasing water-plugging oil-water well, which is characterized by comprising the following steps of: in the step S2, the addition amount of the dicumyl peroxide is 2.5-5% of zinc methacrylate.
8. The preparation method of the plugging material for the oil-increasing water-plugging oil-water well, which is characterized by comprising the following steps of: in the step (1), the mass ratio between the triethanolamine and the cetyltrimethylammonium bromide is 1:3-5; the mass concentration of the triethanolamine is 3-5g/L; the mass fraction of the tetraethoxysilane in deionized water is 10-20%.
9. The preparation method of the plugging material for the oil-increasing water-plugging oil-water well, which is disclosed in claim 8, is characterized in that: in the step (2), the mass concentration of the silicon dioxide nano particles in the ethanol solution is 20-30g/L; the volume fraction of the ethanol solution is 75%; the adding amount of KH570 is 1-5% of the mass of the silica nano-particles; the KH570 solution is KH570 absolute ethanol solution, and the mass concentration of KH570 in the KH570 solution is 4-8mg/mL.
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| CN105924599A (en) * | 2016-05-11 | 2016-09-07 | 中国石油大学(北京) | Modified silicon dioxide nanoparticle and preparation method thereof and drilling fluid |
| CN115160513A (en) * | 2022-07-05 | 2022-10-11 | 中国石油大学(华东) | Rigid-flexible phase-offset blocking agent capable of resisting high temperature of 240 ℃ and resisting high salt and preparation method thereof |
| WO2023205789A1 (en) * | 2022-04-21 | 2023-10-26 | The Curators Of The University Of Missouri | Conformance improvement in hydrocarbon-bearing reservoir using green crosslinkers |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105924599A (en) * | 2016-05-11 | 2016-09-07 | 中国石油大学(北京) | Modified silicon dioxide nanoparticle and preparation method thereof and drilling fluid |
| WO2023205789A1 (en) * | 2022-04-21 | 2023-10-26 | The Curators Of The University Of Missouri | Conformance improvement in hydrocarbon-bearing reservoir using green crosslinkers |
| CN115160513A (en) * | 2022-07-05 | 2022-10-11 | 中国石油大学(华东) | Rigid-flexible phase-offset blocking agent capable of resisting high temperature of 240 ℃ and resisting high salt and preparation method thereof |
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