CN106479472B - A kind of fracturing fluid and preparation method thereof - Google Patents
A kind of fracturing fluid and preparation method thereof Download PDFInfo
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- CN106479472B CN106479472B CN201610766900.6A CN201610766900A CN106479472B CN 106479472 B CN106479472 B CN 106479472B CN 201610766900 A CN201610766900 A CN 201610766900A CN 106479472 B CN106479472 B CN 106479472B
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- 239000012530 fluid Substances 0.000 title claims abstract description 104
- 238000002360 preparation method Methods 0.000 title claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 22
- 230000000855 fungicidal effect Effects 0.000 claims abstract description 20
- 239000000417 fungicide Substances 0.000 claims abstract description 20
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000654 additive Substances 0.000 claims abstract description 19
- 239000004927 clay Substances 0.000 claims abstract description 19
- 230000000996 additive effect Effects 0.000 claims abstract description 18
- 230000008030 elimination Effects 0.000 claims abstract description 17
- 238000003379 elimination reaction Methods 0.000 claims abstract description 17
- 230000007613 environmental effect Effects 0.000 claims abstract description 17
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 17
- 239000011593 sulfur Substances 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 16
- 239000002562 thickening agent Substances 0.000 claims abstract description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 42
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 41
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 30
- 239000000243 solution Substances 0.000 claims description 22
- 229920002907 Guar gum Polymers 0.000 claims description 19
- 239000000665 guar gum Substances 0.000 claims description 19
- 229960002154 guar gum Drugs 0.000 claims description 19
- 235000010417 guar gum Nutrition 0.000 claims description 19
- 235000019441 ethanol Nutrition 0.000 claims description 18
- 238000010792 warming Methods 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 17
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 16
- 239000004327 boric acid Substances 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 16
- 229910052708 sodium Inorganic materials 0.000 claims description 16
- -1 2- ethoxy Chemical group 0.000 claims description 15
- 239000007864 aqueous solution Substances 0.000 claims description 13
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 10
- 229940120146 EDTMP Drugs 0.000 claims description 7
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 7
- 229920013818 hydroxypropyl guar gum Polymers 0.000 claims description 7
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 6
- 229960000583 acetic acid Drugs 0.000 claims description 6
- 238000005660 chlorination reaction Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 239000012362 glacial acetic acid Substances 0.000 claims description 6
- 230000007062 hydrolysis Effects 0.000 claims description 6
- 238000006460 hydrolysis reaction Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000012429 reaction media Substances 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 238000000967 suction filtration Methods 0.000 claims description 6
- 230000008961 swelling Effects 0.000 claims description 6
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Natural products P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims description 5
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 claims description 5
- JBIROUFYLSSYDX-UHFFFAOYSA-M benzododecinium chloride Chemical group [Cl-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 JBIROUFYLSSYDX-UHFFFAOYSA-M 0.000 claims description 5
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 claims description 5
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 5
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 claims description 4
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims description 4
- 239000011592 zinc chloride Substances 0.000 claims description 4
- LMHAGAHDHRQIMB-UHFFFAOYSA-N 1,2-dichloro-1,2,3,3,4,4-hexafluorocyclobutane Chemical compound FC1(F)C(F)(F)C(F)(Cl)C1(F)Cl LMHAGAHDHRQIMB-UHFFFAOYSA-N 0.000 claims description 3
- 229910021592 Copper(II) chloride Inorganic materials 0.000 claims description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 3
- UYAOBGRCBZBHDR-UHFFFAOYSA-N [P].S(O)(O)(=O)=O Chemical compound [P].S(O)(O)(=O)=O UYAOBGRCBZBHDR-UHFFFAOYSA-N 0.000 claims description 3
- KHSLHYAUZSPBIU-UHFFFAOYSA-M benzododecinium bromide Chemical compound [Br-].CCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 KHSLHYAUZSPBIU-UHFFFAOYSA-M 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 229940116318 copper carbonate Drugs 0.000 claims description 3
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 3
- GEZOTWYUIKXWOA-UHFFFAOYSA-L copper;carbonate Chemical compound [Cu+2].[O-]C([O-])=O GEZOTWYUIKXWOA-UHFFFAOYSA-L 0.000 claims description 3
- UOURRHZRLGCVDA-UHFFFAOYSA-D pentazinc;dicarbonate;hexahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[O-]C([O-])=O.[O-]C([O-])=O UOURRHZRLGCVDA-UHFFFAOYSA-D 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 3
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 3
- 239000011686 zinc sulphate Substances 0.000 claims description 3
- LQNYBXQRMCHSHV-UHFFFAOYSA-M P.[Cl-].C(C1=CC=CC=C1)[P+](C1=CC=CC=C1)(C1=CC=CC=C1)C1=CC=CC=C1 Chemical compound P.[Cl-].C(C1=CC=CC=C1)[P+](C1=CC=CC=C1)(C1=CC=CC=C1)C1=CC=CC=C1 LQNYBXQRMCHSHV-UHFFFAOYSA-M 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims 1
- 125000001476 phosphono group Chemical group [H]OP(*)(=O)O[H] 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 238000010008 shearing Methods 0.000 abstract description 10
- 238000004132 cross linking Methods 0.000 abstract description 7
- 239000003292 glue Substances 0.000 abstract description 7
- 239000004576 sand Substances 0.000 abstract description 3
- 239000002585 base Substances 0.000 description 27
- 239000003921 oil Substances 0.000 description 22
- 239000007788 liquid Substances 0.000 description 17
- 235000011121 sodium hydroxide Nutrition 0.000 description 13
- 238000013019 agitation Methods 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 11
- 238000010276 construction Methods 0.000 description 8
- 238000003825 pressing Methods 0.000 description 7
- 230000001351 cycling effect Effects 0.000 description 6
- 230000006378 damage Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- XIWFQDBQMCDYJT-UHFFFAOYSA-M benzyl-dimethyl-tridecylazanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCC[N+](C)(C)CC1=CC=CC=C1 XIWFQDBQMCDYJT-UHFFFAOYSA-M 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000002068 microbial inoculum Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 229940032912 zephiran Drugs 0.000 description 2
- MPNXSZJPSVBLHP-UHFFFAOYSA-N 2-chloro-n-phenylpyridine-3-carboxamide Chemical compound ClC1=NC=CC=C1C(=O)NC1=CC=CC=C1 MPNXSZJPSVBLHP-UHFFFAOYSA-N 0.000 description 1
- XPADKDZILXPJBG-UHFFFAOYSA-N [NH4+].[Br-].C[PH+](CC1=CC=CC=C1)C.[Br-] Chemical compound [NH4+].[Br-].C[PH+](CC1=CC=CC=C1)C.[Br-] XPADKDZILXPJBG-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- USFRYJRPHFMVBZ-UHFFFAOYSA-M benzyl(triphenyl)phosphanium;chloride Chemical compound [Cl-].C=1C=CC=CC=1[P+](C=1C=CC=CC=1)(C=1C=CC=CC=1)CC1=CC=CC=C1 USFRYJRPHFMVBZ-UHFFFAOYSA-M 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003090 exacerbative effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000001434 methanylylidene group Chemical group [H]C#[*] 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NULGSOGHGHDGBH-UHFFFAOYSA-N n,n-dimethyl-1-phenylmethanamine;hydrobromide Chemical compound [Br-].C[NH+](C)CC1=CC=CC=C1 NULGSOGHGHDGBH-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 150000003009 phosphonic acids Chemical class 0.000 description 1
- ZJAOAACCNHFJAH-UHFFFAOYSA-N phosphonoformic acid Chemical class OC(=O)P(O)(O)=O ZJAOAACCNHFJAH-UHFFFAOYSA-N 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—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
-
- 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
- C09K8/84—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
- C09K8/887—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention provides a kind of fracturing fluids, including base fluid and crosslinking agent, the base fluid includes following components: by weight percentage, 0.3%-0.4% thickening agent, 0.2%-2% sulfur elimination, 0.1%-0.2% screener, 0.1%-0.2% environmental protection fungicide, 0.3-0.5% clay stabilizer, 0.3%-0.4% cleanup additive, surplus is water, the mass ratio of the base fluid and crosslinking agent is 100:0.3-1, the fracturing fluid has unique anti-salt property, it can satisfy high salinity production water Quick cross-linking and take sand, with good temperature and shearing sustainability, outstanding grittiness can be strong, broken glue is thorough, fracture flow conductivity influences small, water utilization rate is improved simultaneously, it can satisfy reservoir reconstruction requirement within 100 DEG C.
Description
Technical field
The present invention relates to oil-gas field fracturing technical fields, and in particular to a kind of fracturing fluid and preparation method thereof.
Background technique
Overwhelming majority oil field in China's enters secondary, tertiary oil recovery stage at present, generallys use water filling pressurization to improve
The recovery ratio and oil field development efficiency of crude oil.Therefore, on the one hand, in oil extraction process, a large amount of water source is needed to be infused
Water operation, thus the problem of exacerbating water scarcity.On the other hand, the moisture content of oil field mining liquid is caused to rise year by year.Oil
Field production water, which refers to, is carried out dehydrating wet crude in the water separated by water-oil separating technique.Contain in production water
Some organic matters, bacterium, salt, various additives, and salinity is high, and outer discharge capacity is big, so unsuitable direct emission pollutes ring
Border.In recent years, it is contemplated that it is sharp again to carry out sewage treatment to oil produced water for problem of both environmental protection and economic benefit
With developing to oil field has important strategic importance.It is current most domestic using processing to produce water preparing fracturing fluid
The direction of scholar's research can provide a kind of method not only for disposing polluted water in oil, but also reduce fracturing work to freshwater resources
Demand, reduce construction cost, realize oil field green economy exploitation.
Used plant gum fracturing fluid is prepared with clear water, and fracturing fluid enters stratum, with formation fluid compatibility
Difference easily causes a series of quick reaction of water-sensitives, alkali, and extemporaneous preparation fracturing fluid needs a large amount of water resource, for some light
The region that water resource lacks, seriously constrains the efficiency of pressing crack construction, increases the cost of investment of manpower and material resources.It is raw using oil field
It produces the direct preparing fracturing fluid of water and alleviates above-mentioned contradiction.However it produces high price mineral ion in water, bacterium, mechanical admixture, hang
Floating object content is generally significantly higher than regular industrial water, is directly dissolved in preparation guar gum fracturing fluid, can not be easy to appear viscous, layering and sinks
It forms sediment, can not be crosslinked, the problems such as dispergation is rapid, especially high price mineral ion is easy to cause fracturing fluid viscosity rapid decrease.Therefore,
My company, which pointedly develops, prepares plant gum fracturing fluid suitable for high salinity oil gas field production water, and fracturing fluid has uniqueness
Anti-salt property, salinity production water can be met within 80,000 with liquid, can be reduced conventional fracturing fluid because changing initial reservoir water environment
Caused injury.
Summary of the invention
In order to overcome the problems, such as that conventional fracturing fluid is easily putrid and deteriorated, salt resistant character is poor, viscosity reduction is rapid, reservoir compatibility is poor,
The invention proposes a kind of fracturing fluids and preparation method thereof.
The technical solution of the present invention is to provide a kind of fracturing fluid, including base fluid and crosslinking agent, the base fluid includes following groups
Point: by weight percentage, 0.3%-0.4% thickening agent, 0.2%-2% sulfur elimination, 0.1%-0.2% screener, 0.1%-
0.2% environmentally friendly fungicide, 0.3-0.5% clay stabilizer, 0.3%-0.4% cleanup additive, surplus is water, the base fluid and crosslinking
The mass ratio of agent is 100:0.3-1.
The thickening agent is instant guar gum, and preparation method is as follows: the hydroxypropyl guar gum for being 30.3% by mass percent
It is added in flask, is 42.4% ethyl alcohol as reaction medium using mass percent, dropwise addition mass percent is 9.1% mass concentration
25% sodium hydroxide solution carries out alkalization swelling, and nitrogen is stirred and be passed through under room temperature, is warming up to 60 DEG C, then quality is slowly added dropwise
Percentage is the solution of 18.2% mass fraction concentration 30%3- chlorine 2- hydroxypropyl-trimethyl ammonium chloride in ethyl alcohol, in the reaction
At a temperature of react 5h, be neutralized to pH=7~8 with glacial acetic acid after having reacted, then with ethanol solution wash suction filtration, drying, crush
Obtain instant guar gum.
The sulfur elimination is FeCl3、ZnCl2、ZnSO4·7H2O、CuCl2, basic zinc carbonate, basic copper carbonate it is any one
Kind or the mixture or aqueous solution arbitrarily compounded in them.
The screener is five sodium of diethylene triamine pentamethylene phosphonic, aminotrimethylenephosphonic acid, aminotrimethylenephosphonic acid five
Sodium, ethylene diamine tetra methylene phosphonic acid sodium, five sodium of ethylene diamine tetra methylene phosphonic acid, hexapotassium, hexapotassium
Six sylvite, organic phosphine carboxylic acid, 2- hydroxyphosphonoacetic acid or phosphono-carboxylic acids copolymer in any one or they in appoint
Meaning combined mixture or aqueous solution.
The environmental protection fungicide is dodecyl benzyl dimethyl ammonium chloride, dodecyl trimethyl ammonium chloride, dodecane
Base dimethylbenzyl ammonium bromide, benzyl triphenyl phosphonium chloride phosphine, tetrahydroxy sulfuric acid phosphorus any one or arbitrarily compounded in them
Mixture or aqueous solution.
The clay stabilizer be bis- (2- ethoxy) alkyl dimethyl ammonium chlorides and chlorination -2- ethoxy trimethylammonium in mass ratio
The compound of 1:1.
Preparing for the crosslinking agent is as follows: in the flask equipped with thermometer, water segregator and reflux condensing tube, sequentially adding
Mass percent is 54.1% water, 5.6% triethanolamine, 21.4% boric acid and 1.7% sodium hydroxide, and it is anti-to be warming up to 70 DEG C of stirrings
1h is answered, boric acid complete hydrolysis is made, it is 17.2% ethylene glycol that mass percent, which is then added, it is warming up to 120~130 DEG C, reaction 3~
4h can discharge.
A kind of preparation method of fracturing fluid, comprising the following steps:
Step 1) prepares following each component: by weight percentage, 0.3%-0.4% thickening agent, 0.2%-2% sulphur removal
Agent, 0.1%-0.2% screener, 0.1%-0.2% environmental protection fungicide, 0.3-0.5% clay stabilizer, 0.3%-0.4% are helped
Agent is arranged, surplus is water；
The water prepared in step 1) is added in Agitation Tank step 2), then successively pumps other components in step 1)
Enter Agitation Tank, is uniformly mixed to liquid, forms the base fluid of fracturing fluid；
Step 3) by step 2) obtained base fluid and crosslinking agent pressure break is mixed to form with the mass ratio of 100:0.3-1
Liquid.
A kind of preparation method of fracturing fluid, comprising the following steps:
Step 1) prepares following each component: by weight percentage, 0.3% thickening agent, 0.2% sulfur elimination, 0.1% shielding
Agent, 0.1% environmentally friendly fungicide, 0.3% clay stabilizer, 0.3% cleanup additive, 98.7% water；
The water prepared in step 1) is added in Agitation Tank step 2), then successively pumps other components in step 1)
Enter Agitation Tank, is uniformly mixed to liquid, forms the base fluid of fracturing fluid；
Step 3) by step 2) obtained base fluid and crosslinking agent pressure break is mixed to form with the mass ratio of 100:0.3
Liquid.
Beneficial effects of the present invention:
This fracturing fluid of the invention has unique anti-salt property, can satisfy high salinity production water Quick cross-linking and takes
Sand, fracture flow conductivity influence small, can satisfy reservoir reconstruction requirement within 100 DEG C, the fracturing fluid can with water flooding or
The production water of simple removal of impurities processing is prepared, and high water resource recycling rate of waterused mitigates environmental protection pressure, and the fracturing fluid system has
Good temperature and shearing sustainability, broken glue is thorough, and residue is few, smaller to the injury of reservoir, and it is easily corrupt to solve conventional fracturing fluid
Go bad, salt resistant character is poor, viscosity reduction is rapid, the disadvantage of reservoir compatibility difference.
Detailed description of the invention
Fig. 1 is fracturing fluid described in the embodiment of the present invention 2 in the temperature and shearing sustainability in 85 DEG C of oil/gas wells；
Fig. 2 is fracturing fluid described in the embodiment of the present invention 3 in the temperature and shearing sustainability in 100 DEG C of oil/gas wells；
Fig. 3 is fracturing fluid described in the embodiment of the present invention 4 in the temperature and shearing sustainability in 100 DEG C of oil/gas wells；
Specific embodiment
Embodiment 1:
In order to overcome the problems, such as that conventional fracturing fluid is easily putrid and deteriorated, salt resistant character is poor, viscosity reduction is rapid, reservoir compatibility is poor,
The invention proposes a kind of fracturing fluid, including base fluid and crosslinking agent, the base fluid includes following components: by weight percentage,
0.3%-0.4% thickening agent, 0.2%-2% sulfur elimination, 0.1%-0.2% screener, 0.1%-0.2% environmental protection fungicide,
0.3-0.5% clay stabilizer, 0.3%-0.4% cleanup additive, surplus are water, and the mass ratio of the base fluid and crosslinking agent is 100:
0.3-1。
The thickening agent is a kind of instant guar gum, is addition etherifying agent 3- chlorine 2- hydroxypropyl on the basis of hydroxypropyl guar gum
Trimethyl ammonium chloride modification forms.It is prepared as follows: the hydroxypropyl guar gum that mass percent is 30.3% is added in flask,
It is 42.4% ethyl alcohol as reaction medium using mass percent, the hydrogen-oxygen that mass percent is 9.1% mass concentration 25% is added dropwise
Change sodium solution and carry out alkalization swelling, nitrogen is stirred and be passed through under room temperature, is warming up to 60 DEG C, then mass percent is slowly added dropwise and is
The solution of 18.2% mass fraction concentration 30%3- chlorine 2- hydroxypropyl-trimethyl ammonium chloride is anti-under the reaction temperature in ethyl alcohol
Answer 5h, be neutralized to pH=7~8 with glacial acetic acid after having reacted, then with ethanol solution wash suction filtration, drying, crush obtain speed
Molten guar gum.
The sulfur elimination is FeCl3、ZnCl2、ZnSO4·7H2O、CuCl2, basic zinc carbonate, basic copper carbonate it is any one
Kind or the mixture or aqueous solution arbitrarily compounded in them.The screener is five sodium of diethylene triamine pentamethylene phosphonic, ammonia
Three methylenephosphonic acid of base, five sodium of aminotrimethylenephosphonic acid, ethylene diamine tetra methylene phosphonic acid sodium, five sodium of ethylene diamine tetra methylene phosphonic acid, oneself two
Four methylenephosphonic acid of amine, six sylvite of hexapotassium, organic phosphine carboxylic acid, 2- hydroxyphosphonoacetic acid or phosphono-carboxylic acids
In copolymer any one or in them any combination mixture or aqueous solution.The environmental protection fungicide is dodecyl
Dimethyl benzyl ammonium chloride, dodecyl trimethyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, benzyl triphenyl phosphonium chloride
Any one or the mixture or aqueous solution that are arbitrarily compounded in them of phosphine, tetrahydroxy sulfuric acid phosphorus.Clay stabilizer is bis- (2-
Ethoxy) alkyl dimethyl ammonium chloride and the chlorination -2- ethoxy trimethylammonium compound of 1:1 in mass ratio.The cleanup additive is using pressure
Liquid cleanup additive is split, is not illustrated here.
The crosslinking agent is to carry out network with ethylene glycol and triethanolamine under sodium hydroxide catalyzed effect using boric acid as raw material
Reaction is closed to be prepared.It is prepared as follows: in the flask equipped with thermometer, water segregator and reflux condensing tube, sequentially adding
Mass percent is 5.6% triethanolamine, 21.4% boric acid and 1.7% sodium hydrate aqueous solution, is warming up to 70 DEG C and is stirred to react
About 1h makes boric acid complete hydrolysis, and it is 17.2% ethylene glycol that mass percent, which is then added, is warming up to 120~130 DEG C, and reaction 3~
4h can discharge.
The preparation method of this fracturing fluid of the invention, comprising the following steps:
Step 1) prepares following each component: by weight percentage, 0.3%-0.4% thickening agent, 0.2%-2% sulphur removal
Agent, 0.1%-0.2% screener, 0.1%-0.2% environmental protection fungicide, 0.3-0.5% clay stabilizer, 0.3%-0.4% are helped
Agent is arranged, surplus is water；
The water prepared in step 1) is added in Agitation Tank step 2), then successively pumps other components in step 1)
Enter Agitation Tank, is uniformly mixed to liquid, forms the base fluid of fracturing fluid；
Step 3) by step 2) obtained base fluid and crosslinking agent pressure break is mixed to form with the mass ratio of 100:0.3-1
Liquid.
This fracturing fluid of the invention has unique anti-salt property, can satisfy high salinity production water Quick cross-linking and takes
Sand, with good temperature and shearing sustainability, hanging grittiness can be strong, and broken glue is thorough, and the influence of fracture flow conductivity is small, improves simultaneously
Water utilization rate, can satisfy reservoir reconstruction requirement within 100 DEG C.
Embodiment 2:
A kind of fracturing fluid is present embodiments provided, by weight percentage, 98.7% production is added in Agitation Tank at the scene
Water is successively slowly added to 0.3% instant guar gum, 0.2% sulfur elimination, 0.1% screener, 0.1% environmental protection are killed under pump truck circulation
Microbial inoculum, 0.3% clay stabilizer, 0.3% cleanup additive continue cycling through 30 minutes, are sufficiently mixed uniformly to liquid, form fracturing fluid
Base fluid and crosslinking agent are mixed to form fracturing fluid gel in fracturing blender truck with 100:0.3 quality proportioning in pressing crack construction by base fluid.
Wherein, the instant guar gum is prepared as follows: the hydroxypropyl guar gum that mass percent is 30.3% being added and is burnt
It is 42.4% ethyl alcohol as reaction medium using mass percent, it is 9.1% mass concentration 25% that mass percent, which is added dropwise, in bottle
Sodium hydroxide solution carries out alkalization swelling, and nitrogen is stirred and be passed through under room temperature, is warming up to 60 DEG C, then mass percent is slowly added dropwise
For 18.2% mass concentration 30%3- chlorine 2- hydroxypropyl-trimethyl ammonium chloride solution in ethyl alcohol, reacted under the reaction temperature
5h is neutralized to pH=7~8 with glacial acetic acid after having reacted, then with ethanol solution wash suction filtration, drying, crush obtain it is instant
Guar gum；
The sulfur elimination is FeCl3；The screener is five sodium of diethylene triamine pentamethylene phosphonic；The environmental protection fungicide
For dodecyl benzyl dimethyl ammonium chloride；The clay stabilizer is bis- (2- ethoxy) alkyl dimethyl ammonium chlorides and chlorination -2-
The ethoxy trimethylammonium compound of 1:1 in mass ratio；The cleanup additive uses fracturing fluid cleanup additive, does not do here specific
Explanation；
The crosslinking agent is to carry out network with ethylene glycol and triethanolamine under sodium hydroxide catalyzed effect using boric acid as raw material
Reaction is closed to be prepared.It is prepared as follows: in the flask equipped with thermometer, water segregator and reflux condensing tube, sequentially adding
Mass percent is 5.6% triethanolamine, 21.4% boric acid and 1.7% sodium hydrate aqueous solution, is warming up to 70 DEG C and is stirred to react
About 1h makes boric acid complete hydrolysis, and it is 17.2% ethylene glycol that mass percent, which is then added, is warming up to 120~130 DEG C, and reaction 3~
4h can discharge.
The preparation method is the same as that of Example 1 for fracturing fluid.
The fracturing fluid system formula is suitable for the fracturing reform of the oil/gas well within 85 DEG C.
Test results are shown in figure 1 for heatproof resistant to shearing of the fracturing fluid in 85 DEG C of oil/gas wells, other performances such as the following table 1 institute
Show:
Other the performance test results of 1 fracturing fluid system of table
| Project name | Test result |
| Water flooding preparing fracturing fluid (80,000 mg/L) | It is cross-linking, can hang |
| Residue content (mg/L) | 243.44 |
| Breaking glue solution viscosity (mPas) | 3.42 |
| Core damage rate (%) | 21.32 |
Embodiment 3:
A kind of fracturing fluid is present embodiments provided, 96.3% production water is added in Agitation Tank, under pump truck circulation, successively
Be slowly added to 0.4% instant guar gum, 2% sulfur elimination, 0.2% screener, 0.2% environmentally friendly fungicide, 0.5% clay stabilizer,
0.4% cleanup additive continues cycling through 30 minutes, is sufficiently mixed uniformly to liquid, fracturing fluid base fluid is formed, in pressing crack construction by base
Liquid and crosslinking agent are mixed to form fracturing fluid gel in fracturing blender truck with 100:0.6 quality proportioning.
Wherein, the instant guar gum is prepared as follows: the hydroxypropyl guar gum that mass percent is 30.3% being added and is burnt
It is 42.4% ethyl alcohol as reaction medium using mass percent, it is 9.1% mass concentration 25% that mass percent, which is added dropwise, in bottle
Sodium hydroxide solution carries out alkalization swelling, and nitrogen is stirred and be passed through under room temperature, is warming up to 60 DEG C, then mass percent is slowly added dropwise
For 18.2% mass concentration 30%3- chlorine 2- hydroxypropyl-trimethyl ammonium chloride solution in ethyl alcohol, reacted under the reaction temperature
5h is neutralized to pH=7~8 with glacial acetic acid after having reacted, then with ethanol solution wash suction filtration, drying, crush obtain it is instant
Guar gum；
The sulfur elimination is FeCl3With ZnCl2According to the mixture of the mass ratio of 1:1, the screener is three methene of amino
Five sodium of phosphonic acids；The environmental protection fungicide is dodecyl dimethyl benzyl ammonium bromide；The clay stabilizer is bis- (2- hydroxyl second
Base) alkyl dimethyl ammonium chloride and the chlorination -2- ethoxy trimethylammonium compound of 1:1 in mass ratio；The cleanup additive is bored using river celebrating
Visit the cleanup additive of the homemade model G517 of Engineering Co., Ltd's engineering and technological research institute；
The crosslinking agent is to carry out network with ethylene glycol and triethanolamine under sodium hydroxide catalyzed effect using boric acid as raw material
Reaction is closed to be prepared.It is prepared as follows: in the flask equipped with thermometer, water segregator and reflux condensing tube, sequentially adding
Mass percent is 5.6% triethanolamine, 21.4% boric acid and 1.7% sodium hydrate aqueous solution, is warming up to 70 DEG C and is stirred to react
About 1h makes boric acid complete hydrolysis, and it is 17.2% ethylene glycol that mass percent, which is then added, is warming up to 120~130 DEG C, and reaction 3~
4h can discharge.
The preparation method is the same as that of Example 1 for fracturing fluid.
The fracturing fluid system formula is suitable for the fracturing reform of the oil/gas well within 100 DEG C.
Test results are shown in figure 2 for heatproof resistant to shearing of the fracturing fluid in 100 DEG C of oil/gas wells, other performances such as the following table 2
It is shown:
Other the performance test results of 2 fracturing fluid system of table
| Project name | Test result |
| Water flooding preparing fracturing fluid (80,000 mg/L) | It is cross-linking, can hang |
| Residue content (mg/L) | 296.53 |
| Breaking glue solution viscosity (mPas) | 4.15 |
| Core damage rate (%) | 23.72 |
Embodiment 4:
A kind of fracturing fluid is present embodiments provided, 97.6% production water is added in Agitation Tank, under pump truck circulation, successively
It is slowly added to 0.35% instant guar gum, 1% sulfur elimination, 0.15% screener, 0.15% environmentally friendly fungicide, 0.4% clay stabilization
Agent, 0.35% cleanup additive continue cycling through 30 minutes, are sufficiently mixed uniformly to liquid, fracturing fluid base fluid are formed, in pressing crack construction
Base fluid and crosslinking agent are mixed to form fracturing fluid gel in fracturing blender truck with 100:1 quality proportioning.
Wherein, the instant guar gum is prepared as follows: the hydroxypropyl guar gum that mass percent is 30.3% being added and is burnt
It is 42.4% ethyl alcohol as reaction medium using mass percent, it is 9.1% mass concentration 25% that mass percent, which is added dropwise, in bottle
Sodium hydroxide solution carries out alkalization swelling, and nitrogen is stirred and be passed through under room temperature, is warming up to mass concentration, then quality hundred is slowly added dropwise
Divide than the solution for 18.2% mass concentration 30%3- chlorine 2- hydroxypropyl-trimethyl ammonium chloride in ethyl alcohol, under the reaction temperature
React 5h, be neutralized to pH=7~8 with glacial acetic acid after react, then with ethanol solution wash suction filtration, drying, crushing obtain
Instant guar gum；
The sulfur elimination is FeCl3；The screener is ethylene diamine tetra methylene phosphonic acid sodium；The environmental protection fungicide is 12
Zephiran and dodecyl trimethyl ammonium chloride according to the mass ratio of 1:1 mixture；The clay is steady
Determining agent is bis- (2- ethoxy) alkyl dimethyl ammonium chlorides and the chlorination -2- ethoxy trimethylammonium compound of 1:1 in mass ratio；It is described to help
It arranges agent and uses fracturing fluid cleanup additive, do not illustrate here；
The crosslinking agent is to carry out network with ethylene glycol and triethanolamine under sodium hydroxide catalyzed effect using boric acid as raw material
Reaction is closed to be prepared.It is prepared as follows: in the flask equipped with thermometer, water segregator and reflux condensing tube, sequentially adding
Mass percent is 5.6% triethanolamine, 21.4% boric acid and 1.7% sodium hydrate aqueous solution, is warming up to 70 DEG C and is stirred to react
About 1h makes boric acid complete hydrolysis, and it is 17.2% ethylene glycol that mass percent, which is then added, is warming up to 120~130 DEG C, and reaction 3~
4h can discharge.
The preparation method is the same as that of Example 1 for fracturing fluid.
The fracturing fluid system formula is suitable for the fracturing reform of the oil/gas well within 100 DEG C.
Test results are shown in figure 3 for heatproof resistant to shearing of the fracturing fluid in 100 DEG C of oil/gas wells, other performances such as the following table 3
It is shown:
Other the performance test results of 3 fracturing fluid system of table
| Project name | Test result |
| Water flooding preparing fracturing fluid (80,000 mg/L) | It is cross-linking, can hang |
| Residue content (mg/L) | 272.67 |
| Breaking glue solution viscosity (mPas) | 4.37 |
| Core damage rate (%) | 22.87 |
Embodiment 5:
A kind of fracturing fluid is present embodiments provided, by weight percentage, 98.7% production is added in Agitation Tank at the scene
Water is successively slowly added to 0.3% instant guar gum, 0.2% sulfur elimination, 0.1% screener, 0.1% environmental protection are killed under pump truck circulation
Microbial inoculum, 0.3% clay stabilizer, 0.3% cleanup additive continue cycling through 30 minutes, are sufficiently mixed uniformly to liquid, form fracturing fluid
Base fluid and crosslinking agent are mixed to form fracturing fluid gel in fracturing blender truck with 100:0.3 quality proportioning in pressing crack construction by base fluid.Its
In, the environmental protection fungicide is zephiran.
Embodiment 6:
A kind of fracturing fluid is present embodiments provided, 96.3% production water is added in Agitation Tank, under pump truck circulation, successively
Be slowly added to 0.4% instant guar gum, 2% sulfur elimination, 0.2% screener, 0.2% environmentally friendly fungicide, 0.5% clay stabilizer,
0.4% cleanup additive continues cycling through 30 minutes, is sufficiently mixed uniformly to liquid, fracturing fluid base fluid is formed, in pressing crack construction by base
Liquid and crosslinking agent are mixed to form fracturing fluid gel in fracturing blender truck with 100:0.6 quality proportioning.Wherein, the environmentally friendly fungicide is ten
Dialkyl dimethyl Benzylphosphonium Bromide ammonium.
Embodiment 7:
A kind of fracturing fluid is present embodiments provided, 97.6% production water is added in Agitation Tank, under pump truck circulation, successively
It is slowly added to 0.35% instant guar gum, 1% sulfur elimination, 0.15% screener, 0.15% environmentally friendly fungicide, 0.4% clay stabilization
Agent, 0.35% cleanup additive continue cycling through 30 minutes, are sufficiently mixed uniformly to liquid, fracturing fluid base fluid are formed, in pressing crack construction
Base fluid and crosslinking agent are mixed to form fracturing fluid gel in fracturing blender truck with 100:1 quality proportioning.Wherein, the environmentally friendly fungicide is
Dodecyl benzyl dimethyl ammonium chloride and dodecyl trimethyl ammonium chloride according to the mass ratio of 1:1 mixture
To sum up described in embodiment 2-7, which can be prepared with the production water of water flooding or simple removal of impurities processing,
High water resource recycling rate of waterused mitigates environmental protection pressure, and the fracturing fluid system has good temperature and shearing sustainability, and it is thorough to break glue
Bottom, residue is few, smaller to the injury of reservoir.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (5)
1. a kind of fracturing fluid, it is characterised in that: including base fluid and crosslinking agent, the base fluid includes following components: percentage by weight
Than meter, 0.3%-0.4% thickening agent, 0.2%-2% sulfur elimination, 0.1%-0.2% screener, 0.1%-0.2% environmental protection fungicide, 0.3-
0.5% clay stabilizer, 0.3%-0.4% cleanup additive, surplus are water, and the mass ratio of the base fluid and crosslinking agent is 100:0.3-1；
The thickening agent is instant guar gum, and preparation method is as follows: the hydroxypropyl guar gum that mass percent is 30.3% is added
It is 42.4% ethyl alcohol as reaction medium using mass percent, it is 9.1% mass concentration 25% that mass percent, which is added dropwise, in flask
Sodium hydroxide solution carries out alkalization swelling, and nitrogen is stirred and be passed through under room temperature, is warming up to 60 DEG C, then mass percent is slowly added dropwise
For 18.2% mass fraction concentration, 30% 3- chlorine 2- hydroxypropyl-trimethyl ammonium chloride solution in ethyl alcohol, it is anti-under the reaction temperature
Answer 5h, be neutralized to pH=7~8 with glacial acetic acid after having reacted, then with ethanol solution wash suction filtration, drying, crush obtain it is instant
Guar gum；
The clay stabilizer is bis- (2- ethoxy) alkyl dimethyl ammonium chlorides and chlorination -2- ethoxy trimethylammonium 1:1 in mass ratio
Compound.
2. a kind of fracturing fluid as described in claim 1, it is characterised in that: the sulfur elimination is FeCl3、ZnCl2、ZnSO4·
7H2O、CuCl2, basic zinc carbonate, basic copper carbonate any one or the mixture or aqueous solution that are arbitrarily compounded in them.
3. a kind of fracturing fluid as described in claim 1, it is characterised in that: the screener is diethylene triamine pentamethylene phosphonic
Five sodium, aminotrimethylenephosphonic acid, five sodium of aminotrimethylenephosphonic acid, ethylene diamine tetra methylene phosphonic acid sodium, ethylene diamine tetra methylene phosphonic acid five
Sodium, hexapotassium, six sylvite of hexapotassium, organic phosphine carboxylic acid, 2- hydroxyphosphonoacetic acid or phosphono
In the copolymer of yl carboxylic acid any one or in them any combination mixture or aqueous solution.
4. a kind of fracturing fluid as described in claim 1, it is characterised in that: the environmental protection fungicide is dodecyl dimethyl benzyl
Ammonium chloride, dodecyl trimethyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, benzyl triphenyl phosphonium chloride phosphine, four hydroxyls
Any one or the mixture or aqueous solution that are arbitrarily compounded in them of base sulfuric acid phosphorus.
5. a kind of fracturing fluid as described in claim 1, it is characterised in that: preparing for the crosslinking agent is as follows: temperature is being housed
In the flask of meter, water segregator and reflux condensing tube, sequentially adding mass percent is 54.1% water, 5.6% triethanolamine, 21.4%
Boric acid and 1.7% sodium hydroxide are warming up to 70 DEG C and are stirred to react 1h, make boric acid complete hydrolysis, and mass percent is then added and is
17.2% ethylene glycol is warming up to 120~130 DEG C, and 3~4h of reaction can discharge.
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| CN106046253A (en) * | 2016-06-28 | 2016-10-26 | 江西富诚环保新材料科技有限公司 | Supermolecular surface active micro-electrical type clean fracturing fluid thickening agent specially used for shale gas and preparation method thereof |
| CN109852365A (en) * | 2018-12-17 | 2019-06-07 | 中国石油天然气股份有限公司 | Method for preparing guanidine gum fracturing fluid, guanidine gum fracturing fluid prepared by method and application of guanidine gum fracturing fluid |
| CN115074105B (en) * | 2021-03-10 | 2024-04-30 | 中国石油天然气股份有限公司 | Method for sterilizing and removing hydrogen sulfide of reservoir stratum in shale oil exploration and development |
| CN115678530B (en) * | 2022-10-28 | 2024-01-30 | 四川瑞都石油工程技术服务有限公司 | Shielding agent suitable for high-mineralization water quality and guanidine gum fracturing fluid system and preparation method thereof |
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Effective date of registration: 20201028 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Address before: 710016 Shaanxi city of Xi'an province Weiyang District four road Fengcheng Changqing Technology Building Patentee before: CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED ENGINEERING TECHNOLOGY Research Institute |