CN114989348A - High-temperature-resistant salt-resistant organic silicon filtrate reducer and preparation method and application thereof - Google Patents
High-temperature-resistant salt-resistant organic silicon filtrate reducer and preparation method and application thereof Download PDFInfo
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- CN114989348A CN114989348A CN202210869250.3A CN202210869250A CN114989348A CN 114989348 A CN114989348 A CN 114989348A CN 202210869250 A CN202210869250 A CN 202210869250A CN 114989348 A CN114989348 A CN 114989348A
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- fluid loss
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- 150000003839 salts Chemical class 0.000 title claims abstract description 54
- 239000000706 filtrate Substances 0.000 title claims abstract description 48
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 23
- 239000010703 silicon Substances 0.000 title claims abstract description 23
- 238000005553 drilling Methods 0.000 claims abstract description 40
- 239000000178 monomer Substances 0.000 claims abstract description 40
- 239000012530 fluid Substances 0.000 claims abstract description 35
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 33
- XLPJNCYCZORXHG-UHFFFAOYSA-N 1-morpholin-4-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCOCC1 XLPJNCYCZORXHG-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 15
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 12
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims abstract description 12
- 239000000047 product Substances 0.000 claims abstract description 12
- 239000003999 initiator Substances 0.000 claims abstract description 11
- 239000002904 solvent Substances 0.000 claims abstract description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical compound [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000654 additive Substances 0.000 claims description 38
- 230000000996 additive effect Effects 0.000 claims description 35
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical group CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 31
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 229940088644 n,n-dimethylacrylamide Drugs 0.000 claims description 11
- YLGYACDQVQQZSW-UHFFFAOYSA-N n,n-dimethylprop-2-enamide Chemical group CN(C)C(=O)C=C YLGYACDQVQQZSW-UHFFFAOYSA-N 0.000 claims description 11
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical group N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 10
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 claims description 8
- FLCAEMBIQVZWIF-UHFFFAOYSA-N 6-(dimethylamino)-2-methylhex-2-enamide Chemical compound CN(C)CCCC=C(C)C(N)=O FLCAEMBIQVZWIF-UHFFFAOYSA-N 0.000 claims description 8
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical group CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 8
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 3
- ZWAPMFBHEQZLGK-UHFFFAOYSA-N 5-(dimethylamino)-2-methylidenepentanamide Chemical group CN(C)CCCC(=C)C(N)=O ZWAPMFBHEQZLGK-UHFFFAOYSA-N 0.000 claims description 2
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 2
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 2
- MBGQQKKTDDNCSG-UHFFFAOYSA-N ethenyl-diethoxy-methylsilane Chemical compound CCO[Si](C)(C=C)OCC MBGQQKKTDDNCSG-UHFFFAOYSA-N 0.000 claims description 2
- ZLNAFSPCNATQPQ-UHFFFAOYSA-N ethenyl-dimethoxy-methylsilane Chemical compound CO[Si](C)(OC)C=C ZLNAFSPCNATQPQ-UHFFFAOYSA-N 0.000 claims description 2
- WDQKICIMIPUDBL-UHFFFAOYSA-N n-[2-(dimethylamino)ethyl]prop-2-enamide Chemical compound CN(C)CCNC(=O)C=C WDQKICIMIPUDBL-UHFFFAOYSA-N 0.000 claims description 2
- SWPMNMYLORDLJE-UHFFFAOYSA-N n-ethylprop-2-enamide Chemical compound CCNC(=O)C=C SWPMNMYLORDLJE-UHFFFAOYSA-N 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims 5
- 230000009545 invasion Effects 0.000 abstract description 2
- 239000011435 rock Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 25
- 230000000052 comparative effect Effects 0.000 description 19
- 229920000642 polymer Polymers 0.000 description 14
- 239000004927 clay Substances 0.000 description 12
- 239000002002 slurry Substances 0.000 description 12
- 230000032683 aging Effects 0.000 description 9
- 229920001577 copolymer Polymers 0.000 description 9
- 239000003921 oil Substances 0.000 description 9
- 229910000077 silane Inorganic materials 0.000 description 8
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- -1 alkenyl sulfonic acid Chemical compound 0.000 description 5
- 239000000440 bentonite Substances 0.000 description 5
- 229910000278 bentonite Inorganic materials 0.000 description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- IUMRWGYGZHKZKF-UHFFFAOYSA-N 2-aminoprop-2-enamide Chemical compound NC(=C)C(N)=O IUMRWGYGZHKZKF-UHFFFAOYSA-N 0.000 description 3
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical group C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 125000002091 cationic group Chemical group 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 229920001059 synthetic polymer Polymers 0.000 description 3
- 229910002808 Si–O–Si Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229920001222 biopolymer Polymers 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000004021 humic acid Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 229930014626 natural product Natural products 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 1
- HMBNQNDUEFFFNZ-UHFFFAOYSA-N 4-ethenoxybutan-1-ol Chemical compound OCCCCOC=C HMBNQNDUEFFFNZ-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- QABCGOSYZHCPGN-UHFFFAOYSA-N chloro(dimethyl)silicon Chemical compound C[Si](C)Cl QABCGOSYZHCPGN-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
-
- 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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention provides a high-temperature-resistant salt-resistant organic silicon filtrate reducer as well as a preparation method and application thereof. The preparation method of the filtrate reducer comprises the following steps: under the condition of stirring, adding acrylamide monomers into a solvent, stirring and dissolving, and then sequentially adding 2-acrylamide-2-methylpropanesulfonic acid, 4-acryloylmorpholine, amino-containing acrylamide monomers and vinyl silane monomers; then heating to the reaction temperature, introducing nitrogen to remove oxygen, and adding an initiator to initiate polymerization reaction; and after the reaction is finished, drying and crushing the obtained product to obtain the high-temperature-resistant salt-resistant organic silicon filtrate reducer. The filtrate reducer has the temperature resistance and salt resistance, can reduce the invasion of drilling fluid filtrate into rocks, and enhances the stability of a well wall.
Description
Technical Field
The invention relates to a high-temperature-resistant salt-resistant organic silicon filtrate reducer as well as a preparation method and application thereof, belonging to the field of oilfield chemistry of petroleum industry.
Background
With the continuous increase of the demand of petroleum energy, the exploitation of oil gas in the shallow and middle layers cannot meet the demand, and the exploration and development of oil gas gradually turn to the deep and salt gypsum strata. The performance of the drilling fluid is an important factor for restricting the development of deep oil and gas. As well depth increases, downhole temperature and pressure gradually increase, which presents challenges to the temperature resistance of the drilling fluid. When drilling in a salt-gypsum stratum, the drilling fluid is required to have good performance under the pollution of salt.
High temperatures and salt contamination impose stringent requirements on fluid loss control of drilling fluids during drilling. The large drilling fluid loss can cause well walls to hydrate and become unstable. The stability of the well wall is one of the important factors influencing the safe and efficient drilling. Water-based drilling fluids have a wide range of applications due to their lower cost and better environmental friendliness than oil-based drilling fluids. Fluid loss additives, which control fluid loss by improving mud cake quality, are one of the most important core treatments for water-based drilling fluids.
Through the development of many years, various types of fluid loss additives have been developed, including biopolymers, natural products, humic acids and resins, synthetic polymers, and the like. The biopolymer fluid loss additive mainly comprises starch, cellulose, lignin, chemical modification products thereof and the like, generally has good salt resistance when used as a water-based drilling fluid loss additive, but cannot tolerate high temperature (150 ℃) and can be subjected to oxidation and hydrolysis reaction at high temperature to lose efficacy. The unmodified natural product fluid loss additive is various in types, is mostly a plant rhizome extract, can effectively control the fluid loss of drilling fluid at low temperature, and fails due to pyrolysis at high temperature. Humic acid and resin filtrate reducers have limited application due to poor biodegradability and environmental protection. In order to improve the temperature resistance and salt resistance of the filtrate reducer, the synthesis of polymer filtrate reducers has been widely studied in 30 years, but the polymer filtrate reducers still have the problems of poor temperature resistance and salt resistance or poor compatibility with drilling fluids. Chinese patent document CN114106794A discloses a high-temperature resistant fluid loss additive, which is prepared from the following raw materials in parts by weight: 40-60 parts of alkyl vinyl acetate monomer, 3-8 parts of emulsifier, 7-15 parts of cross-linking agent, 0.5-1.5 parts of initiator, 8-15 parts of cellulose and 20-45 parts of water, wherein the filtrate reducer has better fluid loss control performance, but the temperature resistance is only 170 ℃, and the temperature resistance is insufficient. Chinese patent document CN112679648A discloses a high temperature resistant fluid loss additive for drilling fluids, which is a crosslinked copolymer formed by polymerizing acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, N-vinyl pyrrolidone, and hydroxybutyl vinyl ether under the initiation of an initiator, and then reacting with dimethylchlorosilane, and has good fluid loss control performance at high temperature, but the salt resistance is insufficient. Chinese patent document CN102174314A provides an organosilicon fluid loss additive, which is a copolymer produced by the reaction of raw materials of alkenyl sulfonic acid, alkenyl amide, alkenyl alkanone and alkenyl silane. The fluid loss agent has ideal high temperature resistance, strong adsorbability on the surface of clay at high temperature, improved zeta potential of clay, and thin, compact and tough formed mud cake. The fluid loss control agent has good fluid loss control effect in fresh water, 4.0 wt% brine and saturated brine drilling fluid. But the adopted alkenyl silane has complex structure and higher cost, and the fluid loss additive has serious viscosity increase and has larger influence on the rheological property of the drilling fluid. Chinese patent document CN102876302A provides an acryloyl morpholine polymer treating agent for drilling fluid, which is prepared by polymerizing hydrolysis-resistant monomers N-acryloyl morpholine, 2-acrylamide-2-methyl sodium propanesulfonate, a cross-linking monomer, an initiator and water under the condition that the pH value is 6.0-9.0, and has good fluid loss reduction characteristics under the conditions of high salt (saturated saline) and high calcium (40% calcium chloride) at high temperature (200 ℃), but the preparation process is complicated, the cross-linking reaction is difficult to control, the cross-linking agent can damage the regularity of polymer molecular chains, the addition amount of the cross-linking agent in the drilling fluid is large, and the treating agent has good fluid loss reduction effect when being used together with other fluid loss reducing agents.
Therefore, the research on the high temperature resistant and salt resistant synthetic polymer fluid loss additive is still necessary.
Disclosure of Invention
Aiming at the defects of the prior art, in particular to the problem that the existing filtrate reducer for water-based drilling fluid cannot meet the requirements of high temperature resistance and salt resistance of deep wells on site, the invention provides a high temperature-resistant salt-resistant organic silicon filtrate reducer as well as a preparation method and application thereof. The filtrate reducer has the advantages of temperature resistance and salt resistance, can reduce the invasion of drilling fluid filtrate into rocks, and enhances the stability of a well wall.
The technical scheme of the invention is as follows:
a preparation method of a high-temperature-resistant salt-resistant organic silicon filtrate reducer comprises the following steps:
adding acrylamide monomers into a solvent under the condition of stirring, and sequentially adding 2-acrylamido-2-methylpropanesulfonic Acid (AMPS), 4-Acryloylmorpholine (ACMO), amino-containing acrylamide monomers and vinyl silane monomers after stirring and dissolving; then heating to the reaction temperature, introducing nitrogen to remove oxygen, and adding an initiator to initiate polymerization; and after the reaction is finished, drying and crushing the obtained product to obtain the high-temperature-resistant salt-resistant organic silicon filtrate reducer.
According to a preferred embodiment of the invention, the solvent is N, N-Dimethylformamide (DMF), dimethyl sulfoxide (DMSO) or Tetrahydrofuran (THF).
According to a preferred embodiment of the invention, the acrylamide monomer is N, N-dimethylacrylamide, N-dimethylmethacrylamide, N-diethylacrylamide, N-ethylacrylamide or acrylamide; the ratio of the mass of the acrylamide monomer to the volume of the solvent is 3-15g:100mL, and more preferably 5-10g:100 mL.
According to the invention, the mass ratio of the 2-acrylamido-2-methylpropanesulfonic acid to the acrylamide monomer is preferably 0.05 to 0.4:1, more preferably 0.1 to 0.2: 1.
According to the invention, the mass ratio of the 4-acryloyl morpholine to the acrylamide monomer is preferably 0.05-0.3:1, and more preferably 0.1-0.2: 1.
Preferably, according to the invention, the amino acrylamide-containing monomer is dimethylaminopropyl acrylamide, dimethylaminopropyl methacrylamide or N- [2- (dimethylamino) ethyl ] acrylamide; the mass ratio of the amino-containing acrylamide monomer to the acrylamide monomer is 0.05-0.4:1, and more preferably 0.1-0.2: 1.
Preferably according to the invention, the vinylsilane monomers are vinyltrimethoxysilane, vinyltriethoxysilane, dimethoxymethylvinylsilane or methylvinyldiethoxysilane; the vinyl silane monomer is 0.5-10% of the total mass of acrylamide monomer, 2-acrylamide-2-methylpropanesulfonic acid, 4-acryloyl morpholine and amino acrylamide monomer, and more preferably 1-2%.
According to the invention, the reaction temperature is preferably 55-85 ℃, and the time for introducing nitrogen to remove oxygen is preferably 20-40 min.
Preferably according to the invention, the initiator is azobisisobutyronitrile, azobisisoheptonitrile or benzoyl peroxide; the adding mass of the initiator is 0.05-1.5% of the total mass of the acrylamide monomer, 2-acrylamido-2-methylpropanesulfonic Acid (AMPS), 4-Acryloylmorpholine (ACMO) and the amino-containing acrylamide monomer, and the adding mass is more preferably 0.1-0.3%.
Preferably, according to the invention, the polymerization time is between 2 and 8 hours.
Preferably, according to the invention, the drying is carried out at 45-75 ℃ for 40-60 h.
The high-temperature-resistant salt-resistant organic silicon filtrate reducer is prepared by adopting the preparation method.
According to the invention, the high-temperature-resistant salt-resistant organic silicon fluid loss additive is applied to water-based drilling fluid.
The invention has the following technical characteristics and beneficial effects:
through the intensive research on the high-temperature failure mechanism of the synthetic polymer and the screening experiment of a large number of synthetic monomers, five specific monomers, namely acrylamide monomers, 2-acrylamido-2-methylpropanesulfonic acid, 4-acryloylmorpholine, amino-acrylamide-containing monomers and vinyl silane monomers, are selected as polymerization monomers, and a novel quinary copolymer is developed as a water-based drilling fluid filtrate reducer, wherein the filtrate reducer contains rigid morpholine rings and salt-resistant sulfonic acid groups in the molecular structure, so that the filtrate reducer has excellent temperature resistance and salt pollution resistance, and can effectively control the filtrate loss of the drilling fluid; meanwhile, vinyl silane is introduced into the five-membered copolymer, so that a stable Si-O-Si bond can be formed with clay, and the thermal stability of the polymer is improved; the amino-containing acrylamide monomer further enhances the adsorption capacity of the polymer on the clay surface, so that the filtrate reducer disclosed by the invention has excellent filtrate reduction performance. According to the invention, acrylamide monomers are used as a main chain, and functional monomers with a specific proportion are added to carry out polymerization reaction in a solvent specifically selected by the invention, so that the smooth proceeding of the whole reaction can be ensured, and the high-temperature-resistant and salt-resistant filtrate reducer is successfully prepared.
The high-temperature-resistant salt-resistant organic silicon filtrate reducer has the following advantages:
1. the filtrate reducer can resist high temperature, can obviously reduce the filtrate loss of drilling fluid, and is favorable for stabilizing the well wall.
2. The filtrate reducer has salt resistance, and can still effectively control the filtration of drilling fluid under the condition of salt.
3. The fluid loss additive has good compatibility, has small influence on the rheological property of drilling fluid, and can have good fluid loss effect by adding a small amount of the fluid loss additive.
Detailed Description
The present invention is further illustrated by, but not limited to, the following examples.
Meanwhile, the experimental methods described in the following examples are all conventional methods unless otherwise specified; the reagents, materials and equipment are commercially available, unless otherwise specified.
Example 1
A preparation method of a high-temperature-resistant salt-resistant organic silicon filtrate reducer comprises the following steps:
(1) preparation of monomer solution
100mL of N, N-Dimethylformamide (DMF) is added into a beaker, 4g N, N-dimethylacrylamide is added under stirring, after the N, N-dimethylacrylamide is dissolved, 1g of 2-acrylamido-2-methylpropanesulfonic Acid (AMPS) is added, 1g of 4-Acryloylmorpholine (ACMO) is added after uniform mixing, then 1g of dimethylaminopropyl methacrylamide is added, and finally 0.2g of vinyltrimethoxysilane is added, so that a monomer solution is obtained.
(2) Preparation of the copolymer
Transferring the solution into a three-neck flask provided with a condenser tube, and heating to 55 ℃ by using an oil bath; introducing nitrogen for 30 minutes to remove oxygen in the solution; then adding 0.011g of azodiisobutyronitrile into the solution to initiate polymerization reaction, and carrying out heat preservation reaction for 2 hours at 55 ℃; and after the reaction is finished, drying the obtained product at 45 ℃ for 48 hours, and crushing to obtain the high-temperature-resistant salt-resistant organic silicon filtrate reducer.
Example 2
A preparation method of a high-temperature-resistant salt-resistant organic silicon filtrate reducer comprises the following steps:
(1 preparation of monomer solution
Adding 60mL of N, N-Dimethylformamide (DMF), adding 8g N, N-dimethylacrylamide under the stirring condition, adding 1g of 2-acrylamido-2-methylpropanesulfonic Acid (AMPS) after the N, N-dimethylacrylamide is dissolved, adding 1g of 4-Acryloylmorpholine (ACMO) after uniform mixing, then adding 1g of dimethylaminopropyl methacrylamide, and finally adding 0.2g of vinyltrimethoxysilane to obtain a monomer solution.
(2) Preparation of the copolymer
Transferring the solution to a three-neck flask with a condenser tube, and heating to 55 ℃ by using an oil bath; introducing nitrogen for 30 minutes to remove oxygen in the solution; then adding 0.011g of azodiisobutyronitrile into the solution to initiate polymerization reaction, and carrying out heat preservation reaction for 2 hours at 55 ℃; and after the reaction is finished, drying the obtained product at 45 ℃ for 48 hours, and crushing to obtain the high-temperature-resistant salt-resistant organic silicon filtrate reducer.
Example 3
A preparation method of a high-temperature-resistant salt-resistant organic silicon filtrate reducer comprises the following steps:
(1) preparation of monomer solution
100mL of N, N-Dimethylformamide (DMF) was added to a beaker, 8g N, N-dimethylacrylamide was added with stirring, after it was dissolved, 1g of 2-acrylamido-2-methylpropanesulfonic Acid (AMPS) was added, 1g of 4-Acryloylmorpholine (ACMO) was added after uniform mixing, then 1g of dimethylaminopropyl methacrylamide was added, and finally 0.8g of vinyltrimethoxysilane was added to obtain a monomer solution.
(2) Preparation of the copolymer
Transferring the solution into a three-neck flask provided with a condenser tube, and heating to 55 ℃ by using an oil bath; introducing nitrogen for 30 minutes to remove oxygen in the solution; then adding 0.011g of azodiisobutyronitrile into the solution to initiate polymerization reaction, and carrying out heat preservation reaction for 2 hours at 55 ℃; and after the reaction is finished, drying the obtained product at 45 ℃ for 48 hours, and crushing to obtain the high-temperature-resistant salt-resistant organic silicon filtrate reducer.
Example 4
A preparation method of a high-temperature-resistant salt-resistant organic silicon fluid loss additive comprises the following steps:
(1) preparation of monomer solution
100mL of N, N-Dimethylformamide (DMF) was added to a beaker, 8g N, N-dimethylacrylamide was added with stirring, after it was dissolved, 1g of 2-acrylamido-2-methylpropanesulfonic Acid (AMPS) was added, 1g of 4-Acryloylmorpholine (ACMO) was added after uniform mixing, then 1g of dimethylaminopropyl methacrylamide was added, and finally 0.2g of vinyltrimethoxysilane was added to obtain a monomer solution.
(2) Preparation of the copolymer
Transferring the solution to a three-neck flask with a condenser tube, and heating to 55 ℃ by using an oil bath; introducing nitrogen for 30 minutes to remove oxygen in the solution; then 0.055g of azobisisobutyronitrile is added into the solution to initiate polymerization reaction, and the reaction is carried out for 2 hours under the temperature of 55 ℃; and after the reaction is finished, drying the obtained product at 45 ℃ for 48 hours, and crushing to obtain the high-temperature-resistant salt-resistant organic silicon filtrate reducer.
Example 5
A preparation method of a high-temperature-resistant salt-resistant organic silicon filtrate reducer comprises the following steps:
(1) preparation of monomer solution
Adding 100mL of N, N-Dimethylformamide (DMF) into a beaker, adding 8g N, N-dimethylacrylamide under stirring, adding 1g of 2-acrylamido-2-methylpropanesulfonic Acid (AMPS) after the N, N-dimethylformamide is dissolved, adding 1g of 4-Acryloylmorpholine (ACMO) after uniform mixing, then adding 1g of dimethylaminopropyl methacrylamide, and finally adding 0.2g of vinyltrimethoxysilane to obtain a monomer solution
(2) Preparation of the copolymer
Transferring the solution into a three-neck flask provided with a condenser tube, and heating to 55 ℃ by using an oil bath; introducing nitrogen for 30 minutes to remove oxygen in the solution; then adding 0.011g of azodiisobutyronitrile into the solution to initiate polymerization reaction, and carrying out heat preservation reaction for 2 hours at 55 ℃; and after the reaction is finished, drying the obtained product at 45 ℃ for 48 hours, and crushing to obtain the high-temperature-resistant salt-resistant organic silicon filtrate reducer.
Comparative example 1
An organosilicon fluid loss additive was prepared as described in example 5, except that: in the step (1), 2-acrylamido-2-methylpropanesulfonic Acid (AMPS) is not added.
Comparative example 2
An organosilicon fluid loss additive was prepared as described in example 5, except that: in the step (1), 4-acryloyl morpholine (ACMO) is not added.
Comparative example 3
An organosilicon fluid loss additive was prepared as described in example 5, except that: in the step (1), the amino-containing acrylamide monomer dimethylamino propyl methacrylamide is not added.
Comparative example 4
A fluid loss additive was prepared as described in example 5, except that: in the step (1), vinyl trimethoxy silane monomer is not added.
Comparative example 5
An organosilicon fluid loss additive was prepared as described in example 5, except that: the solvent used in step (1) is equal amount of water.
Comparative example 6
An organosilicon fluid loss additive was prepared as described in example 5, except that: in the step (1), 4-acryloyl morpholine is replaced by styrene.
Test examples
The fluid loss additives prepared in examples and comparative examples were evaluated as follows: temperature resistance evaluation, and comprehensive performance evaluation of temperature resistance and salt resistance.
1. Evaluation of temperature resistance
The normal temperature and pressure filtration test is used for evaluating the capability of the inhibitor for blocking mud cakes and reducing filtrate.
Preparing base slurry: slowly adding 16g of bentonite into 400mL of distilled water under the stirring condition, then adding 1.2g of sodium carbonate, and sealing and maintaining for 24h at room temperature to prepare bentonite-based slurry.
Respectively taking 400mL of base slurry, adding 2 percent (8g) of different filtrate reducer products, and stirring at a high speed of 8000r/min for 20min to obtain a drilling fluid sample. And pouring the sample into an aging tank, hot rolling for 16h at 180 ℃, and aging the base slurry and the drilling fluid sample.
And (3) performance testing: the drilling fluid samples obtained before and after aging and the rheological and fluid loss properties of the base slurry were tested according to the relevant methods in SY/T5621-1993 drilling fluid test procedure, and the experimental results are shown in Table 1.
TABLE 1 results of fluid loss additive temperature resistance
The results show that the filtrate loss reducer prepared by the embodiment can effectively control the filtrate loss, has good compatibility and has small influence on the rheological property of the base slurry. The bentonite flocculates after being heated to high temperature, so that clay particles are agglomerated to form loose mud cakes, and the filtration loss of the base slurry is large and reaches 32.2mL after aging. In example 5, the base slurry loss can be reduced to 4.6 mL. The reason is that the prepared filtrate reducer has amide groups and cationic amino groups in the molecular structure, and can be adsorbed on the clay surface, so that the mud cake is more compact, and the liquid filtering is reduced. The sulfonic group and the morpholine ring in the molecular structure enhance the temperature resistance of the polymer. In addition, the silane in the molecule can be hydrolyzed to form Si-O-Si bonds with clay, so that the adsorption of the polymer on the clay surface is enhanced, and the thermal stability of the polymer molecule at high temperature is enhanced. In the embodiment 1, the N, N dimethylacrylamide accounts for a smaller proportion of the polymer, and the reaction ratio is not in the optimal range, so the filtration loss is larger than that in the embodiment 5; example 2 the reaction is slightly poor due to less DMF solvent, and the performance of the obtained fluid loss agent is slightly inferior to that of example 5; example 3 the fluid loss was slightly greater than example 5 due to the larger silane monomer addition; in example 4, the amount of the initiator added is large, the molecular weight of the polymer is small, and therefore the fluid loss is slightly larger than that in example 5. In comparative example 1, AMPS was not added, which resulted in poor temperature resistance of the obtained fluid loss additive; in the comparative example 2, ACMO containing rigid cyclic groups is not added, and the obtained fluid loss agent has poor temperature resistance, so that the fluid loss is large; in comparative example 3, no amino-containing acrylamide monomer was added, so that the polymer lacked cationic amino groups, resulting in poor adsorption and thus greater fluid loss; in comparative example 4, no silane monomer was added, resulting in poor polymer adsorption and therefore greater fluid loss; in comparative example 5, the solvent was replaced with water, and ACMO was susceptible to intermolecular cross-linking with N, N dimethylacrylamide, AMPS, etc., causing gelation of the product, and silane was hydrolyzed in water, resulting in poor polymer properties; the fluid loss reduction effect is weaker after the styrene is replaced by the styrene in the comparative example 6.
2. Evaluation of comprehensive properties of temperature resistance and salt resistance
Taking 400mL of base slurry, adding 10% (40g) of sodium chloride, stirring at a high speed for 20min under the condition of 8000r/min, then adding 2% (8g) of different filtrate reducer products, and stirring at a high speed for 20min under the condition of 8000r/min to obtain a drilling fluid sample. And pouring the sample into an aging tank, hot rolling for 16h at 180 ℃, and aging the base slurry and the drilling fluid sample.
And (4) performance testing: the drilling fluid samples obtained before and after aging and the rheological and fluid loss properties of the base slurry were tested according to the relevant methods in SY/T5621-1993 drilling fluid test procedure, and the experimental results are shown in Table 2.
TABLE 2 results of fluid loss salt resistance test
As can be seen from Table 2, after 10% sodium chloride was added, the base slurry without the fluid loss additive had a large fluid loss, and the fluid loss after aging was 190 mL. This is because the addition of salt causes severe flocculation of the bentonite and increases the fluid loss. Compared with the drilling fluid, the drilling fluid added with 2% of the fluid loss additive of different embodiments has greatly reduced fluid loss. The drilling fluid added with 2% of the fluid loss additive in example 5 has the lowest fluid loss and is only 7.2mL after aging, which shows that the prepared fluid loss additive has excellent performance. This is due to the large amount of NH contained in the blocking inhibitor molecule 4 + The negative charges on the surface of the clay are neutralized, so that the electrical repulsion force among clay particles is reduced, the clay lattice can be embedded, the clay layer is tensioned, and the swelling of the bentonite is reduced. In comparative example 1, the filtrate reducer was less effective because no anti-salt AMPS was added; in the comparative example 2, no morpholine ring is introduced, so that the synthesized fluid loss additive does not have good temperature resistance and salt resistance; in comparative example 3, no cationic amino group was introduced, and the filtration loss was large; in comparative example 4, no silane monomer with better stability was added, and the fluid loss was larger; comparative example 5 the fluid loss was greater due to silane hydrolysis; comparative example 6 the salt resistance was insufficient after monomer replacement.
Claims (10)
1. A preparation method of a high-temperature-resistant salt-resistant organic silicon fluid loss additive comprises the following steps:
under the condition of stirring, adding acrylamide monomers into a solvent, stirring and dissolving, and then sequentially adding 2-acrylamido-2-methylpropanesulfonic Acid (AMPS), 4-Acryloylmorpholine (ACMO), amino-containing acrylamide monomers and vinyl silane monomers; then heating to the reaction temperature, introducing nitrogen to remove oxygen, and adding an initiator to initiate polymerization; and after the reaction is finished, drying and crushing the obtained product to obtain the high-temperature-resistant salt-resistant organic silicon filtrate reducer.
2. The method for preparing the high temperature and salt resistant silicone fluid loss additive according to claim 1, wherein the solvent is N, N-dimethylformamide, dimethyl sulfoxide or tetrahydrofuran.
3. The method for preparing the high temperature and salt resistant silicone fluid loss additive according to claim 1, wherein the acrylamide monomer is N, N-dimethylacrylamide, N-dimethylmethacrylamide, N-diethylacrylamide, N-ethylacrylamide, or acrylamide; the mass ratio of the acrylamide monomer to the volume of the solvent is 3-15g:100mL, preferably 5-10g:100 mL.
4. The preparation method of the high temperature and salt resistant organosilicon fluid loss additive according to claim 1, wherein the mass ratio of the 2-acrylamido-2-methylpropanesulfonic acid to the acrylamide monomer is 0.05-0.4:1, preferably 0.1-0.2: 1.
5. The preparation method of the high temperature and salt resistant organosilicon fluid loss additive according to claim 1, wherein the mass ratio of the 4-acryloyl morpholine to the acrylamide monomer is 0.05-0.3:1, preferably 0.1-0.2: 1.
6. The method for preparing the high temperature and salt resistant silicone fluid loss additive according to claim 1, wherein the amino-containing acrylamide monomer is dimethylaminopropyl acrylamide, dimethylaminopropyl methacrylamide or N- [2- (dimethylamino) ethyl ] acrylamide; the mass ratio of the acrylamide monomer containing amino to the acrylamide monomer is 0.05-0.4:1, preferably 0.1-0.2: 1.
7. The method for preparing the high temperature and salt resistant silicone fluid loss additive according to claim 1, wherein the vinyl silane monomer is vinyl trimethoxy silane, vinyl triethoxy silane, dimethoxy methyl vinyl silane or methyl vinyl diethoxy silane; the vinyl silane monomer is 0.5-10%, preferably 1-2% of the total mass of acrylamide monomer, 2-acrylamido-2-methylpropanesulfonic acid, 4-acryloylmorpholine and amino-containing acrylamide monomer.
8. The preparation method of the high temperature and salt resistant organosilicon fluid loss additive according to claim 1, wherein the reaction temperature is 55-85 ℃, and the time for introducing nitrogen to remove oxygen is 20-40 min;
the initiator is azobisisobutyronitrile, azobisisoheptonitrile or benzoyl peroxide; the adding mass of the initiator is 0.05-1.5%, preferably 0.1-0.3% of the total mass of the acrylamide monomer, 2-acrylamide-2-methylpropanesulfonic acid, 4-acryloylmorpholine and the amino-containing acrylamide monomer;
the time of the polymerization reaction is 2-8 h; the drying is carried out at 45-75 ℃ for 40-60 h.
9. The high-temperature-resistant salt-resistant organosilicon fluid loss additive is characterized by being prepared by the preparation method of any one of claims 1-8.
10. Use of the high temperature and salt resistant silicone fluid loss additive of claim 9 in a water-based drilling fluid.
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