CN116375933B - Alkali-free viscoelastic thickener for polyacrylamide fracturing and preparation method thereof - Google Patents
Alkali-free viscoelastic thickener for polyacrylamide fracturing and preparation method thereof Download PDFInfo
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- CN116375933B CN116375933B CN202310415090.XA CN202310415090A CN116375933B CN 116375933 B CN116375933 B CN 116375933B CN 202310415090 A CN202310415090 A CN 202310415090A CN 116375933 B CN116375933 B CN 116375933B
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- 239000002562 thickening agent Substances 0.000 title claims abstract description 47
- 229920002401 polyacrylamide Polymers 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 58
- 238000006243 chemical reaction Methods 0.000 claims abstract description 31
- 239000000839 emulsion Substances 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 18
- KFDVPJUYSDEJTH-UHFFFAOYSA-N 4-ethenylpyridine Chemical compound C=CC1=CC=NC=C1 KFDVPJUYSDEJTH-UHFFFAOYSA-N 0.000 claims abstract description 14
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003999 initiator Substances 0.000 claims abstract description 14
- CVNCFZIIZGNVFD-UHFFFAOYSA-N n,n-bis(trimethylsilyl)prop-2-en-1-amine Chemical compound C[Si](C)(C)N([Si](C)(C)C)CC=C CVNCFZIIZGNVFD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 13
- XFTALRAZSCGSKN-UHFFFAOYSA-M sodium;4-ethenylbenzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=C(C=C)C=C1 XFTALRAZSCGSKN-UHFFFAOYSA-M 0.000 claims abstract description 13
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 13
- 239000008367 deionised water Substances 0.000 claims abstract description 12
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 12
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910000388 diammonium phosphate Inorganic materials 0.000 claims abstract description 12
- 235000019838 diammonium phosphate Nutrition 0.000 claims abstract description 12
- 239000007864 aqueous solution Substances 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 54
- 229910052757 nitrogen Inorganic materials 0.000 claims description 27
- 230000001105 regulatory effect Effects 0.000 claims description 14
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 14
- 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
- 239000002245 particle Substances 0.000 claims description 9
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 8
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 7
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 7
- 235000010265 sodium sulphite Nutrition 0.000 claims description 7
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 6
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 5
- 238000010926 purge Methods 0.000 claims description 5
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 5
- 235000019345 sodium thiosulphate Nutrition 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
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 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
- RNMDNPCBIKJCQP-UHFFFAOYSA-N 5-nonyl-7-oxabicyclo[4.1.0]hepta-1,3,5-trien-2-ol Chemical compound C(CCCCCCCC)C1=C2C(=C(C=C1)O)O2 RNMDNPCBIKJCQP-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- -1 polyoxyethylene nonylphenol Polymers 0.000 claims description 2
- 239000000047 product Substances 0.000 abstract description 19
- 230000009467 reduction Effects 0.000 abstract description 13
- 230000001954 sterilising effect Effects 0.000 abstract description 12
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 11
- 150000003839 salts Chemical class 0.000 abstract description 3
- 239000006227 byproduct Substances 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 abstract 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 abstract 1
- 229940051841 polyoxyethylene ether Drugs 0.000 abstract 1
- 229920000056 polyoxyethylene ether Polymers 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 26
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000012530 fluid Substances 0.000 description 10
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229920001059 synthetic polymer Polymers 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000004289 sodium hydrogen sulphite Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 2
- 244000046052 Phaseolus vulgaris Species 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 238000010364 biochemical engineering Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000005696 Diammonium phosphate Substances 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical group C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229920001938 Vegetable gum Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- MNCGMVDMOKPCSQ-UHFFFAOYSA-M sodium;2-phenylethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=CC1=CC=CC=C1 MNCGMVDMOKPCSQ-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 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
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
- C09K8/604—Polymeric surfactants
-
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- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/605—Compositions for stimulating production by acting on the underground formation containing biocides
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
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- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/882—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
- C09K8/905—Biopolymers
Abstract
The invention belongs to the technical field of petroleum exploitation, and particularly relates to an alkali-free viscoelastic thickener for polyacrylamide fracturing and a preparation method thereof. The preparation method comprises the following steps: sequentially adding acrylamide, 4-vinyl pyridine, sodium p-styrenesulfonate, N-allyl-N, N-bis (trimethylsilyl) amine, N-methylenebisacrylamide, natural latex, no. 26 white oil, nonylphenol polyoxyethylene ether, diammonium hydrogen phosphate and deionized water into a reaction kettle, and uniformly stirring to form emulsion; dripping an initiator aqueous solution from a head tank, and continuously stirring after the dripping is finished to obtain a product emulsion; granulating the product emulsion to obtain the alkali-free viscoelastic thickener. The invention has the advantages of simple synthesis process and no byproducts; meanwhile, the invention has the characteristics of salt resistance, sterilization, drag reduction and high plugging strength.
Description
Technical Field
The invention belongs to the technical field of petroleum exploitation, and particularly relates to an alkali-free viscoelastic thickener for polyacrylamide fracturing and a preparation method thereof.
Background
Along with the large-scale exploitation and consumption of conventional oil and gas reservoirs, compact sandstone gas, coal bed gas, shale gas and other low-permeability and ultra-low-permeability deep high-temperature unconventional oil and gas resources need to be developed and utilized. Because the reservoir is influenced by water flooding for a long time, the reservoir heterogeneity of the hypotonic and ultra-hypotonic oil reservoirs is enhanced, the pore permeability is poor, a high-permeability channel is formed, injected water is easy to break through along the high-permeability layer, a large amount of water is discharged from an oil well, and the productivity of an oil field is influenced.
The most effective method for improving the oil recovery ratio of the oil reservoir is to carry out fracturing operation, inject fracturing fluid from a water injection well to plug a high permeable layer, press a new crack in the stratum, and extend the crack so as to adjust the water absorption profile of the well.
The fracturing fluid used in fracturing must have the characteristics of high viscosity, high shear resistance, high sand carrying property and the like. The thickener is used as a main agent of the fracturing fluid and is used for improving the viscosity of the fracturing fluid, reducing the fluid loss of the fracturing fluid and suspending and carrying propping agents.
The thickener used at home and abroad at present is prepared from natural vegetable gum and its derivatives, cellulose and its derivatives, and synthetic polymer. Compared with the prior art, the synthetic polymer has better viscosity-temperature characteristic and high-temperature stability, and has the advantages of good stability and strong sand carrying capacity. The common synthetic polymers include polyacrylamide, methylene polyacrylamide and the like, the properties of the polymers can be changed by controlling the synthesis conditions, construction requirements are met, the resistance reduction performance is good, but the problems such as higher friction force of the pipeline in the process of migration exist. The molecular transformation of the polyacrylamide fracturing fluid to form the profile control polymer with excellent performance is a hot spot direction for the improvement of the fracturing technology in the future.
Patent CN91111287.1 discloses a fracturing fluid thickener which is suitable for the fracturing reformation operation of low permeability hydrocarbon reservoirs. The plant-based high-yield fertilizer is prepared by adopting herb-based Tian bean powder and carrying out chemical modification on the herb-based Tian bean powder by ethanol, caustic soda, epoxypropane and water, and can obtain a better yield-increasing effect. However, the fracturing fluid is synthesized from plant raw materials, is vulnerable to bacterial attack, and has a higher residue content than the synthetic polymer thickener.
Disclosure of Invention
The invention provides an alkali-free viscoelastic thickener for polyacrylamide fracturing and a preparation method thereof. The invention has the advantages of simple synthesis process and no byproducts; meanwhile, the invention has the characteristics of salt resistance, sterilization, drag reduction and high plugging strength.
In order to achieve the above object, one of the objects of the present invention is to disclose an alkali-free viscoelastic thickener for fracturing of polyacrylamide, the molecular structural formula of the thickener is as follows:
，
wherein:
a=1000-20000；
b=20000-200000；
c=500-10000；
d=2000-40000；
e=5000-100000；
f=20000-200000；
g=500-10000；
h=2000-40000；
i=5000-100000。
the thickener has a viscosity-average molecular weight of 20000000-40000000.
The invention further discloses a preparation method of the alkali-free viscoelastic thickener for polyacrylamide fracturing, which comprises the following specific steps:
(1) Purging the reaction kettle and the pipeline with nitrogen for 10-15min, wherein the nitrogen introducing speed is 800-1200mL/min during purging, and the nitrogen introducing speed is adjusted to be 200-250mL/min in the later synthesis process;
(2) Sequentially adding acrylamide, 4-vinyl pyridine, sodium p-styrenesulfonate, N-allyl-N, N-bis (trimethylsilyl) amine, N-methylenebisacrylamide, natural latex, no. 26 white oil, TX-10 (polyoxyethylene nonylphenol ether), diammonium hydrogen phosphate and deionized water into a reaction kettle, stirring at a low speed of 250-300rpm, and regulating pH to 7-8 with 5wt% ammonia water; regulating stirring speed to 2000-2500rpm, and stirring for 20-30min until all the materials become homogeneous emulsion;
(3) The stirring speed of the reaction kettle is reduced to 250-300rpm, the temperature is slowly raised, and after the temperature reaches 40-45 ℃, the temperature is stopped to be raised, and stirring is continued; dripping an initiator aqueous solution from a head tank, heating the reaction kettle to 70-80 ℃ after dripping, continuously stirring for 40-60min, and cooling to below 40 ℃ to obtain a product emulsion;
(4) Granulating the product emulsion into particles with the diameter of 0.5-2mm by using a granulator to obtain the alkali-free viscoelasticity thickener.
Preferably, the 4-vinylpyridine, sodium p-styrenesulfonate, N-allyl-N, N-bis (trimethylsilyl) amine, N-methylenebisacrylamide are used in an amount of 0.02 to 0.05 molar parts, 0.1 to 0.2 molar parts, 0.2 to 0.4 molar parts, 0.05 to 0.1 molar parts, respectively, based on 1 molar part of acrylamide.
Preferably, in the step (2), the weight ratio of the natural latex, the No. 26 white oil, the TX-10, the diammonium phosphate, the deionized water and the acrylamide is 0.2-0.3:0.1-0.2:0.05-0.1:0.02-0.05:10-12:1.
preferably, in the step (3), the initiator is a mixed solution of persulfate and one of sodium bisulfite, sodium sulfite and sodium thiosulfate.
More preferably, the persulfate is one of potassium persulfate, ammonium persulfate and sodium persulfate.
More preferably, the concentration of the persulfate is 10 to 12wt% and the concentration of sodium bisulfite or sodium sulfite or sodium thiosulfate is 5 to 8wt%.
Preferably, the weight ratio of the initiator to the acrylamide is 0.2-0.5:1.
the reaction equation for synthesizing the alkali-free viscoelastic thickener is as follows:
，
，
the alkali-free viscoelastic thickener is a five-membered high polymer taking N, N-methylene bisacrylamide, acrylamide, 4-vinylpyridine, sodium p-styrenesulfonate and N-allyl-N, N-bis (trimethylsilyl) amine as monomers, has the characteristics of salt resistance, sterilization, resistance reduction and high viscosity, is used for modifying strata in oilfield fracturing, and can improve oil displacement effect. Wherein, the acrylamide is a polymer main body and has the effects of fracturing and oil displacement; the 4-vinyl pyridine has bactericidal effect, and the pyridine ring is extremely stable, so that the shearing resistance of the whole molecule can be enhanced; sodium styrenesulfonate is a hydrophilic anion, so that the oil-water interfacial tension can be reduced during oil displacement, the viscosity of crude oil can be reduced, the oil displacement effect can be improved, and the shearing resistance of the whole molecule can be enhanced by the benzene ring structure; the N-allyl-N, N-bis (trimethylsilyl) amine is a silicon-containing lipophilic surfactant, so that the surface tension and the interfacial tension can be greatly reduced, and the oil displacement effect is improved; n, N-methylene bisacrylamide is used as a cross-linking agent, so that on one hand, the whole molecule is changed into a two-dimensional and three-dimensional net structure from a one-dimensional linear structure, the molecular weight is greatly increased, the swept volume is increased during oil displacement, and meanwhile, the structure of the N, N-methylene bisacrylamide is similar to that of polyacrylamide, so that the oil displacement effect can be enhanced; the natural latex has the characteristics of high elasticity and good film forming property, and the adding proportion of the natural latex can be adjusted to control the molecular elasticity in the synthesis process; the No. 26 white oil belongs to lipophilic substances, so that the friction resistance can be greatly reduced; on one hand, TX-10 can improve the polymerization quality and the uniformity, increase the molecular weight of the polymer, and on the other hand, because the TX-10 is a surfactant, the oil displacement effect can be enhanced.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) The alkali-free viscoelasticity thickener has higher sterilization effect, and the sterilization rate reaches 100% at the concentration of 100 mg/L;
(2) The alkali-free viscoelastic thickener of the invention has the characteristic of high apparent viscosity, and the apparent viscosity of 0.5 weight percent concentration is more than 150；
(3) The alkali-free viscoelastic thickener has good drag reduction effect, and the drag reduction rate of 0.5wt% concentration is more than 70%.
Detailed Description
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
The invention is further illustrated by the following examples:
example 1 (1) the reactor and the pipeline were purged with nitrogen for 10min at a nitrogen introduction rate of 1000mL/min, and the nitrogen introduction rate was adjusted to 250mL/min in the post synthesis process.
(2) To the reaction vessel were successively added 1mol of acrylamide, 0.05mol of 4-vinylpyridine, 0.1mol of sodium p-styrenesulfonate, 0.4mol of N-allyl-N, N-bis (trimethylsilyl) amine, 0.1mol of N, N-methylenebisacrylamide, 21.3g of natural latex, 7.1g of No. 26 white oil, 3.55g of TX-10, 1.42g of diammonium hydrogen phosphate, 852g of deionized water, and the mixture was stirred at a low speed of 250rpm, and pH7-8 was adjusted with 5wt% ammonia. The stirring speed was adjusted to 2000rpm and stirring was continued for 20min until all the raw materials had completely become a homogeneous emulsion.
(3) The stirring speed of the reaction kettle is regulated down to 250rpm, the temperature is slowly raised, and after the temperature reaches 40 ℃, the temperature is stopped to be raised, and stirring is continued. 14.2g of initiator aqueous solution is dripped from a high-level tank, wherein the concentration of potassium persulfate is 10wt percent, the concentration of sodium sulfite is 5wt percent, after the dripping is finished, the temperature of the reaction kettle is raised to 70 ℃, stirring is continued for 60min, and the temperature is reduced to below 40 ℃ to obtain the product emulsion.
(4) Granulating the product emulsion into particles with the diameter of 0.5-2mm by using a granulator to obtain the alkali-free viscoelasticity thickener A.
Example 2 (1) the reactor and the pipeline were purged with nitrogen for 12min at a nitrogen introduction rate of 800mL/min, and the post synthesis procedure was adjusted to a nitrogen introduction rate of 200mL/min.
(2) 1mol of acrylamide, 0.045mol of 4-vinylpyridine, 0.12mol of sodium p-styrenesulfonate, 0.37mol of N-allyl-N, N-bis (trimethylsilyl) amine, 0.09mol of N, N-methylenebisacrylamide, 20.2g of natural latex, 8.4g of No. 26 white oil, 4.17g of TX-10, 1.68g of diammonium hydrogen phosphate and 831g of deionized water are sequentially added into the reaction kettle, stirring is carried out at a low speed for 15 minutes, the stirring speed is 300rpm, and pH7-8 is regulated by 5wt% of ammonia water. The stirring speed was adjusted to 2500rpm and stirring was continued for 30min until all the raw materials had completely become a homogeneous emulsion.
(3) The stirring speed of the reaction kettle is regulated down to 300rpm, the temperature is slowly raised, and after the temperature reaches 45 ℃, the temperature is stopped to be raised, and stirring is continued. 18.8g of an aqueous initiator solution is dripped from a high-level tank, wherein the concentration of potassium persulfate is 12wt percent, the concentration of sodium bisulphite is 6wt percent, after the dripping is finished, the temperature of the reaction kettle is raised to 80 ℃, the stirring is continued for 40min, and the temperature is reduced to below 40 ℃ to obtain the product emulsion.
(4) Granulating the product emulsion into particles with the diameter of 0.5-2mm by using a granulator to obtain the alkali-free viscoelasticity thickener B.
Example 3 (1) the reactor and the pipeline were purged with nitrogen for 15min at a nitrogen introduction rate of 1200mL/min, and the post synthesis procedure was adjusted to a nitrogen introduction rate of 220mL/min.
(2) 1mol of acrylamide, 0.04mol of 4-vinylpyridine, 0.14mol of sodium p-styrenesulfonate, 0.33mol of N-allyl-N, N-bis (trimethylsilyl) amine, 0.08mol of N, N-methylenebisacrylamide, 18.7g of natural latex, 9.7g of No. 26 white oil, 7.1g of TX-10, 1.89g of diammonium hydrogen phosphate and 800g of deionized water are sequentially added into the reaction kettle, stirring is carried out at a low speed of 12 minutes at a stirring speed of 250rpm, and pH7-8 is regulated by 5wt% ammonia water. The stirring speed was adjusted to 2200rpm and stirring was continued for 25min until all the raw materials had completely become a homogeneous emulsion.
(3) The stirring speed of the reaction kettle is regulated down to 260rpm, the temperature is slowly raised, and after the temperature reaches 42 ℃, the temperature is stopped to be raised, and stirring is continued. 35.5g of initiator aqueous solution is dripped from a high-level tank, wherein the concentration of ammonium persulfate is 11wt percent, the concentration of sodium thiosulfate is 8wt percent, after the dripping is finished, the temperature of the reaction kettle is raised to 75 ℃, stirring is continued for 55min, and the temperature is reduced to below 40 ℃ to obtain the product emulsion.
(4) Granulating the product emulsion into particles with the diameter of 0.5-2mm by using a granulator to obtain the alkali-free viscoelasticity thickener C.
Example 4 (1) the reactor and the pipeline were purged with nitrogen for 13min at a nitrogen introduction rate of 1100mL/min, and the post synthesis procedure was adjusted to a nitrogen introduction rate of 210mL/min.
(2) 1mol of acrylamide, 0.035mol of 4-vinylpyridine, 0.15mol of sodium p-styrenesulfonate, 0.3mol of N-allyl-N, N-bis (trimethylsilyl) amine, 0.07mol of N, N-methylenebisacrylamide, 16.9g of natural latex, 10.9g of No. 26 white oil, 6.78g of TX-10, 2.47g of diammonium hydrogen phosphate and 747g of deionized water are sequentially added into the reaction kettle, stirring is carried out at a low speed of 300rpm, and pH7-8 is adjusted by using 5wt% ammonia water. The stirring speed was adjusted to 2300rpm and stirring was continued for 22min until all the raw materials had completely become a homogeneous emulsion.
(3) The stirring speed of the reaction kettle is regulated down to 270rpm, the temperature is slowly raised, and after the temperature reaches 43 ℃, the temperature is stopped to be raised, and stirring is continued. 21.4g of initiator aqueous solution is dripped from a high-level tank, wherein the concentration of ammonium persulfate is 10wt percent, the concentration of sodium bisulphite is 7wt percent, after the dripping is finished, the temperature of the reaction kettle is increased to 80 ℃, the stirring is continued for 45min, and the temperature is reduced to below 40 ℃ to obtain the product emulsion.
(4) Granulating the product emulsion into particles with the diameter of 0.5-2mm by using a granulator to obtain the alkali-free viscoelasticity thickener D.
Example 5 (1) the reactor and the pipeline were purged with nitrogen for 15min at a nitrogen introduction rate of 900mL/min, and the post synthesis procedure was adjusted to a nitrogen introduction rate of 240mL/min.
(2) 1mol of acrylamide, 0.03mol of 4-vinylpyridine, 0.17mol of sodium p-styrenesulfonate, 0.27mol of N-allyl-N, N-bis (trimethylsilyl) amine, 0.07mol of N, N-methylenebisacrylamide, 15.8g of natural latex, 12.3g of No. 26 white oil, 5.22g of TX-10, 3.55g of diammonium hydrogen phosphate and 765g of deionized water are sequentially added into the reaction kettle, stirring is carried out at a low speed of 260rpm, and pH7-8 is adjusted by using 5wt% ammonia water. The stirring speed was adjusted to 2100rpm and stirring was continued for 28min until all the raw materials had completely formed a uniform emulsion.
(3) The stirring speed of the reaction kettle is reduced to 280rpm, the temperature is slowly increased, and after the temperature reaches 41 ℃, the temperature is stopped to be increased, and stirring is continued. 24.7g of initiator aqueous solution is dripped from a high-level tank, wherein the concentration of ammonium persulfate is 12wt% and the concentration of sodium sulfite is 6wt%, after the dripping is finished, the temperature of the reaction kettle is raised to 70 ℃, the stirring is continued for 50min, and the temperature is reduced to below 40 ℃ to obtain the product emulsion.
(4) Granulating the product emulsion into particles with the diameter of 0.5-2mm by using a granulator to obtain the alkali-free viscoelasticity thickener E.
Example 6 (1) the reactor and the pipeline were purged with nitrogen for 10min at a nitrogen introduction rate of 1000mL/min, and the post synthesis procedure was adjusted to a nitrogen introduction rate of 230mL/min.
(2) 1mol of acrylamide, 0.025mol of 4-vinylpyridine, 0.19mol of sodium p-styrenesulfonate, 0.24mol of N-allyl-N, N-bis (trimethylsilyl) amine, 0.06mol of N, N-methylenebisacrylamide, 14.9g of natural latex, 13.6g of No. 26 white oil, 5.78g of TX-10, 3.21g of diammonium hydrogen phosphate and 788g of deionized water are sequentially added into the reaction kettle, stirring is carried out at a low speed for 12min, the stirring speed is 280rpm, and pH7-8 is regulated by 5wt% of ammonia water. The stirring speed was adjusted to 2400rpm and stirring was continued for 26min until all the raw materials had completely become a homogeneous emulsion.
(3) The stirring speed of the reaction kettle is regulated down to 290rpm, the temperature is slowly raised, and after the temperature reaches 40 ℃, the temperature is stopped to be raised, and stirring is continued. 31.3g of initiator aqueous solution is dripped from a high-level tank, wherein the concentration of sodium persulfate is 11wt percent, the concentration of sodium sulfite is 6wt percent, after the dripping is finished, the temperature of the reaction kettle is raised to 78 ℃, stirring is continued for 60min, and the temperature is reduced to below 40 ℃ to obtain the product emulsion.
(4) Granulating the product emulsion into particles with the diameter of 0.5-2mm by using a granulator to obtain the alkali-free viscoelasticity thickener F.
Example 7 (1) the reactor and the pipeline were purged with nitrogen for 13min, the rate of nitrogen introduction during the purge was 1200mL/min, and the rate of nitrogen introduction was adjusted to 250mL/min in the post synthesis process.
(2) 1mol of acrylamide, 0.02mol of 4-vinylpyridine, 0.2mol of sodium p-styrenesulfonate, 0.2mol of N-allyl-N, N-bis (trimethylsilyl) amine, 0.05mol of N, N-methylenebisacrylamide, 14.2g of natural latex, 14.2g of No. 26 white oil, 6.14g of TX-10, 2.55g of diammonium hydrogen phosphate and 710g of deionized water are sequentially added into the reaction kettle, stirring is carried out at a low speed of 270rpm, and pH7-8 is regulated by using 5wt% ammonia water. The stirring speed was adjusted to 2300rpm and stirring was continued for 25min until all the raw materials had completely become a homogeneous emulsion.
(3) The stirring speed of the reaction kettle is regulated down to 260rpm, the temperature is slowly raised, and after the temperature reaches 45 ℃, the temperature is stopped to be raised, and stirring is continued. 29.8g of an aqueous initiator solution is dripped from a high-level tank, wherein the concentration of sodium persulfate is 10wt percent, the concentration of sodium bisulphite is 7wt percent, after the dripping is finished, the temperature of the reaction kettle is raised to 72 ℃, the stirring is continued for 40min, and the temperature is reduced to below 40 ℃ to obtain the product emulsion.
(4) Granulating the product emulsion into particles with the diameter of 0.5-2mm by using a granulator to obtain the alkali-free viscoelasticity thickener G.
Example 8: evaluation of Sterilization Effect
The water outside the joint station of the oil extraction plant in the victory oil field contains 250 SRB (sulfate reducing bacteria), 1000ml of water sample is taken to be added with 0.1g of the alkali-free viscoelastic thickener of the invention, the mixture is uniformly stirred to prepare the concentration of 100mg/L, the mixture is heated to 60 ℃, 100ml of the mixture is taken to be placed in a fine-mouth bottle, the bottle is placed in a baking oven at 60 ℃ for 1 hour, the sample is taken, the residual bacterial content is detected by adopting a three-tube MPN method, and the sterilization rate is calculated.
Comparative experiments were performed using a Coke-made Hongdali biochemical Co., ltd. HDCH-233 fracturing thickener, the results of which are shown in Table 1.
As can be seen from table 1: the sterilization rate of the alkali-free viscoelastic thickener A-G reaches 100% when the concentration is 100 mg/L; compared with the sterilization rate of the HDCH-233 fracturing thickener of Hongdali biochemical engineering Co Ltd in the Job, the sterilization rate is 0, and the sterilization capability is not achieved.
Example 9 apparent viscosity test
The apparent viscosity of the invention was tested by using 10000mg/L sodium chloride solution to a concentration of 0.5wt% with reference to SY/T6376-2008 method 7.1 in general technical Condition for fracturing fluids.
Comparative experiments were performed using a Coke-made Hongdali biochemical Co., ltd. HDCH-233 fracturing thickener, the results of which are shown in Table 1.
As can be seen from table 1: the alkali-free viscoelastic thickeners A-G of the invention have an apparent viscosity of greater than 150 at a concentration of 0.5wt%The method comprises the steps of carrying out a first treatment on the surface of the Wherein F has an apparent viscosity of up to 190 °f>The method comprises the steps of carrying out a first treatment on the surface of the Whereas the apparent viscosity of the contrast product HDCH-233 fracturing thickener of Hongdali biochemical engineering Co., ltd is 103%>Significantly lower than the present invention.
Example 10 drag reduction rate test
The drag reduction rate is tested by using 10000mg/L sodium chloride solution to prepare the concentration of 0.5wt percent and referring to the method of 7.13 in SY/T6376-2008 general technical Condition for fracturing fluids.
Comparative experiments were performed using a Coke-made Hongdali biochemical Co., ltd. HDCH-233 fracturing thickener, the results of which are shown in Table 1.
TABLE 1 results of test for sterilizing Rate, apparent viscosity, drag reduction Rate
，
As can be seen from table 1: the drag reduction rate of the alkali-free viscoelastic thickener A-G is more than 70% when the concentration is 0.5 wt%; wherein the drag reduction rate of G is up to 82%; compared with the drag reduction rate of HDCH-233 fracturing thickener of Hongdali biochemical engineering Co Ltd in the Job, the drag reduction rate is 49, which is obviously lower than that of the invention.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the invention, all falling within the scope of protection of the invention.
Claims (8)
1. The preparation method of the multifunctional alkali-free viscoelastic thickener for the polyacrylamide fracturing is characterized by comprising the following steps of:
(1) Purging the reaction kettle and the pipeline with nitrogen for 10-15min, wherein the nitrogen introducing speed is 800-1200mL/min during purging, and the nitrogen introducing speed is adjusted to be 200-250mL/min in the later synthesis process;
(2) Sequentially adding acrylamide, 4-vinyl pyridine, sodium p-styrenesulfonate, N-allyl-N, N-bis (trimethylsilyl) amine, N-methylenebisacrylamide, natural latex, no. 26 white oil, TX-10 (polyoxyethylene nonylphenol ether), diammonium hydrogen phosphate and deionized water into a reaction kettle, stirring at a low speed of 250-300rpm, and regulating pH to 7-8 with 5wt% ammonia water; regulating stirring speed to 2000-2500rpm, and stirring for 20-30min until all the materials become homogeneous emulsion;
(3) The stirring speed of the reaction kettle is reduced to 250-300rpm, the temperature is slowly raised, and after the temperature reaches 40-45 ℃, the temperature is stopped to be raised, and stirring is continued; dripping an initiator aqueous solution from a head tank, heating the reaction kettle to 70-80 ℃ after dripping, continuously stirring for 40-60min, and cooling to below 40 ℃ to obtain a product emulsion;
(4) Granulating the product emulsion into particles with the diameter of 0.5-2mm by using a granulator to obtain the alkali-free viscoelasticity thickener;
the amounts of 4-vinylpyridine, sodium p-styrenesulfonate, N-allyl-N, N-bis (trimethylsilyl) amine, N-methylenebisacrylamide are 0.02 to 0.05, 0.1 to 0.2, 0.2 to 0.4, 0.05 to 0.1, respectively, based on 1 mole of acrylamide.
2. The method for preparing the multifunctional alkali-free viscoelastic thickener for polyacrylamide fracturing according to claim 1, wherein in the step (2), the weight ratio of the natural latex, the No. 26 white oil, the TX-10, the diammonium hydrogen phosphate, the deionized water and the acrylamide is 0.2-0.3:0.1-0.2:0.05-0.1:0.02-0.05:10-12:1.
3. the method for preparing the multifunctional alkali-free viscoelastic thickener for polyacrylamide fracturing according to claim 1, wherein in the step (3), the initiator is a mixed solution of persulfate and one of sodium bisulfite, sodium sulfite and sodium thiosulfate.
4. The method for preparing the multifunctional alkali-free viscoelastic thickener for polyacrylamide fracturing according to claim 1 or 3, wherein the weight ratio of the initiator to the acrylamide is 0.2-0.5:1.
5. the method for preparing the multifunctional alkali-free viscoelastic thickener for polyacrylamide fracturing according to claim 3, wherein the persulfate is one of potassium persulfate, ammonium persulfate and sodium persulfate.
6. The method for preparing the multifunctional alkali-free viscoelastic thickener for polyacrylamide fracturing according to claim 3, wherein the concentration of the persulfate is 10-12wt%, and the concentration of the sodium bisulfite or sodium sulfite or sodium thiosulfate is 5-8wt%.
7. The multifunctional alkali-free viscoelastic thickener for the polyacrylamide fracturing is characterized by comprising the following molecular structural formula:
，
wherein:
a=1000-20000；
b=20000-200000；
c=500-10000；
d=2000-40000；
e=5000-100000；
f=20000-200000；
g=500-10000；
h=2000-40000；
i=5000-100000。
8. the multifunctional alkali-free viscoelastic thickener for fracturing of polyacrylamide according to claim 7, wherein the multifunctional alkali-free viscoelastic thickener has a viscosity average molecular weight of 20000000-40000000.
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| JPH03119088A (en) * | 1989-09-30 | 1991-05-21 | Toagosei Chem Ind Co Ltd | Thickener |
| CN104893704A (en) * | 2014-03-04 | 2015-09-09 | 天津昌鑫油田服务有限公司 | Water soluble hydrophobic associating polymer fracturing fluid system and preparation method thereof |
| CN114940894A (en) * | 2022-07-26 | 2022-08-26 | 山东诺尔生物科技有限公司 | Star-shaped temperature-resistant fracturing fluid thickening agent and preparation method thereof |
| CN115594798A (en) * | 2022-12-12 | 2023-01-13 | 山东科兴化工有限责任公司（Cn） | Oil field fracturing fluid thickening agent and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03119088A (en) * | 1989-09-30 | 1991-05-21 | Toagosei Chem Ind Co Ltd | Thickener |
| CN104893704A (en) * | 2014-03-04 | 2015-09-09 | 天津昌鑫油田服务有限公司 | Water soluble hydrophobic associating polymer fracturing fluid system and preparation method thereof |
| CN114940894A (en) * | 2022-07-26 | 2022-08-26 | 山东诺尔生物科技有限公司 | Star-shaped temperature-resistant fracturing fluid thickening agent and preparation method thereof |
| CN115594798A (en) * | 2022-12-12 | 2023-01-13 | 山东科兴化工有限责任公司（Cn） | Oil field fracturing fluid thickening agent and preparation method and application thereof |
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