CN114181682A - High-temperature-resistant salt-resistant cross-linked polymer filtrate reducer and preparation method and application thereof - Google Patents
High-temperature-resistant salt-resistant cross-linked polymer filtrate reducer and preparation method and application thereof Download PDFInfo
- Publication number
- CN114181682A CN114181682A CN202111573397.XA CN202111573397A CN114181682A CN 114181682 A CN114181682 A CN 114181682A CN 202111573397 A CN202111573397 A CN 202111573397A CN 114181682 A CN114181682 A CN 114181682A
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- China
- Prior art keywords
- containing olefin
- olefin monomer
- salt
- resistant
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 62
- 229920006037 cross link polymer Polymers 0.000 title claims abstract description 51
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 37
- 239000000706 filtrate Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000178 monomer Substances 0.000 claims abstract description 122
- 150000001336 alkenes Chemical class 0.000 claims abstract description 83
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims abstract description 83
- 239000000654 additive Substances 0.000 claims abstract description 53
- 230000000996 additive effect Effects 0.000 claims abstract description 50
- 238000005553 drilling Methods 0.000 claims abstract description 47
- -1 cyclic lactam Chemical class 0.000 claims abstract description 24
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 21
- 125000003368 amide group Chemical group 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 16
- 125000002843 carboxylic acid group Chemical group 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 14
- 238000006116 polymerization reaction Methods 0.000 claims description 13
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 12
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 claims description 11
- 239000003999 initiator Substances 0.000 claims description 11
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 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 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 9
- 150000001408 amides Chemical class 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 9
- 229910021641 deionized water Inorganic materials 0.000 claims description 9
- 239000007800 oxidant agent Substances 0.000 claims description 9
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 8
- 239000003513 alkali Substances 0.000 claims description 7
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 7
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 6
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 6
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 6
- 159000000007 calcium salts Chemical class 0.000 claims description 6
- RRPJQNOJVXGCKC-UHFFFAOYSA-M methyl-tris(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(CC=C)CC=C RRPJQNOJVXGCKC-UHFFFAOYSA-M 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 6
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 6
- FYRWKWGEFZTOQI-UHFFFAOYSA-N 3-prop-2-enoxy-2,2-bis(prop-2-enoxymethyl)propan-1-ol Chemical compound C=CCOCC(CO)(COCC=C)COCC=C FYRWKWGEFZTOQI-UHFFFAOYSA-N 0.000 claims description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 5
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 claims description 5
- 159000000003 magnesium salts Chemical class 0.000 claims description 5
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 5
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 5
- 159000000000 sodium salts Chemical class 0.000 claims description 5
- NJSSICCENMLTKO-HRCBOCMUSA-N [(1r,2s,4r,5r)-3-hydroxy-4-(4-methylphenyl)sulfonyloxy-6,8-dioxabicyclo[3.2.1]octan-2-yl] 4-methylbenzenesulfonate Chemical compound C1=CC(C)=CC=C1S(=O)(=O)O[C@H]1C(O)[C@@H](OS(=O)(=O)C=2C=CC(C)=CC=2)[C@@H]2OC[C@H]1O2 NJSSICCENMLTKO-HRCBOCMUSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- SCZZNWQQCGSWSZ-UHFFFAOYSA-N 1-prop-2-enoxy-4-[2-(4-prop-2-enoxyphenyl)propan-2-yl]benzene Chemical compound C=1C=C(OCC=C)C=CC=1C(C)(C)C1=CC=C(OCC=C)C=C1 SCZZNWQQCGSWSZ-UHFFFAOYSA-N 0.000 claims description 3
- JHSWSKVODYPNDV-UHFFFAOYSA-N 2,2-bis(prop-2-enoxymethyl)propane-1,3-diol Chemical compound C=CCOCC(CO)(CO)COCC=C JHSWSKVODYPNDV-UHFFFAOYSA-N 0.000 claims description 3
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 3
- WROUWQQRXUBECT-UHFFFAOYSA-N 2-ethylacrylic acid Chemical compound CCC(=C)C(O)=O WROUWQQRXUBECT-UHFFFAOYSA-N 0.000 claims description 3
- LPNSCOVIJFIXTJ-UHFFFAOYSA-N 2-methylidenebutanamide Chemical compound CCC(=C)C(N)=O LPNSCOVIJFIXTJ-UHFFFAOYSA-N 0.000 claims description 3
- MXRGSJAOLKBZLU-UHFFFAOYSA-N 3-ethenylazepan-2-one Chemical compound C=CC1CCCCNC1=O MXRGSJAOLKBZLU-UHFFFAOYSA-N 0.000 claims description 3
- VJLAXUKSBGPPAH-UHFFFAOYSA-N 3-ethenylpiperidin-2-one Chemical compound C=CC1CCCNC1=O VJLAXUKSBGPPAH-UHFFFAOYSA-N 0.000 claims description 3
- NISQVXMPIWWGOO-UHFFFAOYSA-N 4,5-dihydro-1h-imidazole;dihydrochloride Chemical compound Cl.Cl.C1CN=CN1 NISQVXMPIWWGOO-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- GEAWFZNTIFJMHR-UHFFFAOYSA-N hepta-1,6-diene Chemical compound C=CCCCC=C GEAWFZNTIFJMHR-UHFFFAOYSA-N 0.000 claims description 3
- BPCNEKWROYSOLT-UHFFFAOYSA-N n-phenylprop-2-enamide Chemical compound C=CC(=O)NC1=CC=CC=C1 BPCNEKWROYSOLT-UHFFFAOYSA-N 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 230000033116 oxidation-reduction process Effects 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- ARJOQCYCJMAIFR-UHFFFAOYSA-N prop-2-enoyl prop-2-enoate Chemical group C=CC(=O)OC(=O)C=C ARJOQCYCJMAIFR-UHFFFAOYSA-N 0.000 claims description 3
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 3
- 229940001584 sodium metabisulfite Drugs 0.000 claims description 3
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 3
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 3
- 235000010265 sodium sulphite Nutrition 0.000 claims description 3
- NLVXSWCKKBEXTG-UHFFFAOYSA-N vinylsulfonic acid Chemical compound OS(=O)(=O)C=C NLVXSWCKKBEXTG-UHFFFAOYSA-N 0.000 claims description 3
- 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 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- 229910052749 magnesium Inorganic materials 0.000 claims 1
- 239000011591 potassium Substances 0.000 claims 1
- 229910052700 potassium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 18
- WFIZEGIEIOHZCP-UHFFFAOYSA-M potassium formate Chemical compound [K+].[O-]C=O WFIZEGIEIOHZCP-UHFFFAOYSA-M 0.000 abstract description 17
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical class [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 abstract description 9
- 229920000642 polymer Polymers 0.000 description 34
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 32
- 239000012267 brine Substances 0.000 description 18
- 238000006243 chemical reaction Methods 0.000 description 18
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 12
- 239000008186 active pharmaceutical agent Substances 0.000 description 12
- 229920001577 copolymer Polymers 0.000 description 11
- 238000001914 filtration Methods 0.000 description 11
- 239000011780 sodium chloride Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 9
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 125000004122 cyclic group Chemical group 0.000 description 7
- 150000003951 lactams Chemical group 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000005098 hot rolling Methods 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 6
- WHNPOQXWAMXPTA-UHFFFAOYSA-N 3-methylbut-2-enamide Chemical compound CC(C)=CC(N)=O WHNPOQXWAMXPTA-UHFFFAOYSA-N 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 230000001603 reducing effect Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 235000010980 cellulose Nutrition 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000012266 salt solution Substances 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- UVRCNEIYXSRHNT-UHFFFAOYSA-N 3-ethylpent-2-enamide Chemical compound CCC(CC)=CC(N)=O UVRCNEIYXSRHNT-UHFFFAOYSA-N 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 125000003342 alkenyl group Chemical group 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 229920001897 terpolymer Polymers 0.000 description 2
- 229920006029 tetra-polymer Polymers 0.000 description 2
- 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 description 1
- HFCUBKYHMMPGBY-UHFFFAOYSA-N 2-methoxyethyl prop-2-enoate Chemical compound COCCOC(=O)C=C HFCUBKYHMMPGBY-UHFFFAOYSA-N 0.000 description 1
- ZUGAOYSWHHGDJY-UHFFFAOYSA-K 5-hydroxy-2,8,9-trioxa-1-aluminabicyclo[3.3.2]decane-3,7,10-trione Chemical compound [Al+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O ZUGAOYSWHHGDJY-UHFFFAOYSA-K 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 229920000881 Modified starch Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004280 Sodium formate Substances 0.000 description 1
- 229920006318 anionic polymer Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 125000003010 ionic group Chemical group 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 235000019426 modified starch Nutrition 0.000 description 1
- 229940088644 n,n-dimethylacrylamide Drugs 0.000 description 1
- YLGYACDQVQQZSW-UHFFFAOYSA-N n,n-dimethylprop-2-enamide Chemical group CN(C)C(=O)C=C YLGYACDQVQQZSW-UHFFFAOYSA-N 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 235000019254 sodium formate Nutrition 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010189 synthetic method 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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/58—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine
- C08F220/585—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide containing oxygen in addition to the carbonamido oxygen, e.g. N-methylolacrylamide, N-(meth)acryloylmorpholine and containing other heteroatoms, e.g. 2-acrylamido-2-methylpropane sulfonic acid [AMPS]
-
- 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
-
- 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
- C09K8/04—Aqueous well-drilling compositions
- C09K8/06—Clay-free compositions
- C09K8/12—Clay-free compositions containing synthetic organic macromolecular compounds or their precursors
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)
- Dispersion Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention belongs to the technical field of drilling, and relates to a high-temperature-resistant salt-resistant cross-linked polymer fluid loss additive, and a preparation method and application thereof. The high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer is prepared by copolymerizing 0-10 parts of amido-containing olefin monomer, 5-40 parts of cyclic lactam-containing olefin monomer, 50-95 parts of sulfonic group-containing olefin monomer, 0-40 parts of carboxylic group-containing olefin monomer and 0.001-0.05 part of cross-linking agent in parts by mole; wherein the total mole fraction of each monomer is 100 parts. The high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer disclosed by the invention can resist the temperature as high as 240 ℃, and can resist saturated sodium chloride, saturated sodium formate and more than 57% of potassium formate.
Description
Technical Field
The invention belongs to the technical field of drilling, and relates to a high-temperature-resistant salt-resistant cross-linked polymer fluid loss additive, a preparation method and application thereof, in particular to a high-temperature-resistant salt-resistant cross-linked polymer fluid loss additive for high-temperature reservoir drilling fluid (high-temperature drilling fluid).
Background
The filtrate reducer for drilling fluid is one of important additives in drilling fluid, and mainly reduces the filtrate loss of the drilling fluid by forming a flexible, thin and compact filter cake with low permeability on a well wall, thereby playing an important role in stabilizing the well wall and protecting an oil-gas layer.
With the continuous development of petroleum exploration and development technology, wells for drilling deep wells and ultra-deep wells are more and more, and the bottom temperature is higher and higher, which puts higher requirements on the temperature resistance of the drilling fluid filtrate reducer.
Drilling fluids for drilling high temperature reservoirs (high temperature drilling fluids), on the other hand, require not only high temperature resistance of the fluid loss additive, but also salt resistance of the polymer fluid loss additive (e.g., 1.4 g/cm)3The mass percentage concentration of the potassium formate saline in the potassium formate saline-based drilling fluid is about 57%).
The currently used fluid loss additives are: modified celluloses, modified starches, resins, and polymers. The temperature resistance of the cellulose and starch filtrate reducers is poor, wherein the use temperature of the cellulose filtrate reducers is generally lower than 140-150 ℃, and the use temperature of the starch filtrate reducers is generally lower than 120 ℃; lignite resin and phenolic resin filtrate reducers can resist certain high temperature, but have poor salt resistance; the hydrolyzed polyacrylonitrile filtrate reducer also has the capability of resisting certain high temperature (generally lower than 180 ℃) and salt, but has weaker calcium resistance. The artificially synthesized polymer fluid loss additive has greatly raised heat resisting capacity by introducing heat resisting monomer into the molecular structure of the polymer.
A great deal of literature reports the synthetic method of the artificially synthesized polymer fluid loss additive and the application effect of the artificially synthesized polymer fluid loss additive in drilling fluid.
Wangzhong et al copolymerize linear polymers of different molecular structures with two or more monomers selected from Acrylamide (AM), methacrylamide (MAM), Dimethylacrylamide (DMAM), Diethylacrylamide (DEAM), 2-acrylamido-2-methylpropanesulfonic Acid (AMPS), Acrylic Acid (AA), methacrylic acid (MAA), diallyldimethylammonium chloride (DMDAAC), 2-hydroxy-3-methacryloxytrimethylammonium chloride (HNOPTA), Vinyl Acetate (VAC), and the like. (Wangzhua, design of drilling fluid chemicals and development of New products [ M ]. northwest university Press, 2006-11-1)
The Chinese patent with the application number of 200910017000.1 discloses a high-temperature-resistant anti-collapse fluid loss additive for drilling fluid and a preparation method thereof. Is prepared by copolymerizing AM-AA-cationic monomer-methylene bisacrylamide, and the mass ratio of the four monomers is (5-10) to (1-3) to (0.5-2) to (0.05-0.1).
The Chinese patent with the application number of 20091020694.4 discloses a high-temperature-resistant polymer fluid loss additive for drilling fluid and a preparation method thereof. The fluid loss additive is a copolymer generated by the reaction of alkenyl sulfonic acid, alkenyl amide, alkenyl alkanone and alkenyl quaternary ammonium salt.
The Chinese patent with the application number of 200910060168.1 discloses a high-temperature resistant zwitterionic polymer fluid loss additive for drilling fluid and a preparation method thereof. The AM-AMPS-DMDAAC-SSS quaternary copolymer has the monomer molar ratio of 9-11 to 3-4 to 0.5-1.5 to 1.0-1.5.
The Chinese patent with the application number of 200910311206.5 discloses a preparation method of a high-temperature-resistant and salt-resistant drilling fluid filtrate reducer. Is prepared by complexing and copolymerizing AM-AMPS-AA and aluminum citrate.
The Chinese invention patent with the application number of 201110127803.X discloses a drilling fluid filtrate reducer. Is prepared by graft copolymerization of AM, AMPS, NVP, formaldehyde, sulfonated lignite and sulfomethylated phenolic resin.
The Chinese patent with application number of 201110128127.8 discloses a salt-resistant and high-temperature-resistant polymer fluid loss additive. The monomer is an AM-AMPS-DMDAAC-AA quadripolymer, and the optimal mass ratio of the monomer is 40:30:10: 10.
The Chinese patent with the application number of 201110449434.6 discloses a high-temperature-resistant salt-resistant polymer fluid loss additive for drilling fluid. The four-component copolymer is an alkenyl amide-alkenyl benzenesulfonic acid-alkenyl alkanone-alkenyl sulfonic acid quadripolymer, and the molar ratio of the four monomers is (8-12): (1-3): (2-4): (4-6).
The Chinese patent with the application number of 201410601913.9 discloses a micro-crosslinked polymer fluid loss additive for drilling fluid. The material is prepared by crosslinking an organic acid monomer, AM, an amide hydrolysis inhibiting monomer, a large side group temperature-resistant monomer and calcium ions.
The Chinese patent with the application number of 201610854661.X discloses an amphoteric temperature-resistant and salt-resistant filtrate reducer for drilling fluid. The monomer is AM-AMPS-allyl polyethylene glycol-trihydroxyethyl allyl ammonium bromide copolymer, and the molar ratio of the four monomers is (8.1-20): (9-15.2): (2.4-4.3): (8-10).
The Chinese patent with the application number of 201710127078.3 discloses an amino polymer fluid loss additive for high-temperature-resistant and salt-resistant water-based drilling fluid. The copolymer is an AM-AMPS-AA-DMDAAC-NVP copolymer, and the mass parts of five monomers are (280-340): (20-70): (20-55): (20-50): (8-20).
The Chinese patent with application number of 201810367916.9 discloses a high-temperature resistant fluid loss additive. Is AA-AM-AMPS-SSS-AN copolymer, and five monomers comprise (310-330) in parts by mass: (310-330): (140-160): (230-260): (130-160).
The Chinese patent with the application number of 201810525580.4 discloses a amphoteric ion polymer fluid loss additive with a comb-shaped structure. The monomer is DMAM-AMPS-DMDAAC-polyethylene glycol monomethyl ether acrylate copolymer, and the four monomers comprise (10-60) in parts by mass: (20-40): (5-20): (5-30).
The Chinese patent with the application number of 201810536382.8 discloses a low-viscosity copolymer fluid loss additive for drilling fluid. Is prepared from AM-AMPS-SSS-IA and a nano material tool, and comprises the following components in parts by weight: (6-12): (1-4): (1-3): (0.5-2): (0.5-2).
The Chinese patent with application number 201810560677.9 discloses an ultra-high temperature resistant anionic polymer fluid loss additive for a drilling fluid and completion fluid. Is AM-AMPS-dimethylaminoethyl methacrylate copolymer, and AMPS accounts for 35-42.5% of the molecular chain in molar ratio.
The Chinese patent with application number 202010789472.5 discloses a high-temperature-resistant and salt-resistant quaternary polymer for drilling fluid. Is prepared by copolymerizing AMPS-AA-NVP-macromonomer, and comprises the following components in parts by weight: (20-30): (8-10): (11-15): (10-14).
Some of the artificially synthesized polymer fluid loss additives are insoluble in high-salinity (such as saturated sodium formate, more than 57 percent potassium formate and the like) saline water and lose the fluid loss reducing effect; some high salinity saline water is dissolved, but the fluid loss seepage channel cannot be effectively plugged, and the fluid loss reducing effect cannot be achieved; some are not suitable for soil-free drilling fluid systems. Accordingly, there is a need for an improved high temperature resistant, salt resistant polymer fluid loss additive.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-temperature-resistant salt-resistant cross-linked polymer fluid loss additive, and a preparation method and application thereof.
On one hand, the invention provides a high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer, which is prepared by copolymerizing 0-10 parts of an amido-containing olefin monomer, 5-40 parts of a cyclic lactam-containing olefin monomer, 50-95 parts of a sulfonic group-containing olefin monomer, 0-40 parts of a carboxylic group-containing olefin monomer and 0.001-0.05 part of a cross-linking agent in parts by mole; wherein the total mole fraction of each monomer is 100 parts.
The high-temperature-resistant salt-resistant cross-linked polymer fluid loss agent is prepared by copolymerizing 0-10 parts of amide-containing olefin monomer, 20-30 parts of cyclic lactam-containing olefin monomer, 60-80 parts of sulfonic group-containing olefin monomer, 0-10 parts of carboxylic group-containing olefin monomer and 0.001-0.05 part of cross-linking agent according to molar percentage; wherein the total mole fraction of each monomer is 100 parts.
The amide-containing olefin monomer is one or more of acrylamide, methacrylamide, ethyl acrylamide, N-dimethylacrylamide, N-diethylacrylamide and N-phenylacrylamide.
The olefin monomer containing cyclic lactam is one or more of vinyl butyrate lactam, vinyl pyrrolidone, vinyl valerolactam and vinyl caprolactam.
In the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer, the sulfonic group-containing olefin monomer is vinyl sulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid and sodium salt, potassium salt, magnesium salt or calcium salt thereof.
The olefin monomer containing carboxylic acid groups is acrylic anhydride, acrylic acid, methacrylic acid, ethacrylic acid and sodium salt, potassium salt, magnesium salt or calcium salt thereof.
The high-temperature-resistant salt-resistant crosslinked polymer fluid loss additive is one or more of methylene bisacrylamide, bisphenol A diallyl ether, 1, 3-butadiene, 1, 6-heptadiene, pentaerythritol diallyl ether, pentaerythritol triallyl ether, triallyl methyl ammonium chloride, diallyl dimethyl ammonium chloride and triallyl methyl ammonium chloride.
The weight average molecular weight of the high-temperature-resistant and salt-resistant crosslinked polymer fluid loss agent is 20-500 ten thousand, and preferably 50-200 ten thousand.
In another aspect, the invention provides a method for preparing a high temperature resistant and salt resistant crosslinked polymer fluid loss additive, comprising:
(1) adding alkali into deionized water, adding a sulfonic acid group-containing olefin monomer and a carboxylic acid group-containing olefin monomer according to a ratio under stirring, and controlling the temperature of the solution to be less than or equal to 40 ℃;
(2) adding an amide-containing olefin monomer, a cyclic lactam-containing olefin monomer and a cross-linking agent according to the mixture ratio, so that the mass ratio of the total mass of the monomers to the deionized water is 10-40: 60-90, and adjusting the pH value to 6.5-10 by using alkali liquor;
(3) heating to 30-50 ℃, adding an initiator to initiate polymerization reaction, cooling the material after 2-8h, discharging, drying and crushing to obtain the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer product.
According to the preparation method of the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer, the temperature of the polymerization reaction is 30-45 ℃, and the reaction time is 4-6 h.
In the preparation method of the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer, the alkali liquor is an aqueous solution of sodium hydroxide, potassium hydroxide or calcium hydroxide.
The initiator is an oxidation system consisting of an oxidant or an oxidant and a reducing agent according to the mass ratio of (1-2): (2-1) an oxidation-reduction system.
In the preparation method of the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer, the addition amount of the initiator is 0.01-0.5% of the total mass of the monomers.
In the preparation method of the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer, the oxidizing agent is one or more of sodium persulfate, potassium persulfate, ammonium persulfate, 2-azobis (2-methylpropylamidine) dihydrochloride and 2,2' -azabicyclo (2-imidazoline) dihydrochloride.
In the preparation method of the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer, the reducing agent is one or more of sodium sulfite, sodium bisulfite and sodium metabisulfite.
According to the preparation method of the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer, the polymerization reaction can be carried out in the atmosphere of air or inert gas, and the inert gas is nitrogen, argon or helium.
In the preparation method of the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer, the inert gas is nitrogen.
In still another aspect, the invention also provides application of the high-temperature-resistant and salt-resistant crosslinked polymer fluid loss additive in water-based drilling fluid for drilling high-temperature deep wells, in particular application in high-temperature drilling fluid.
The technical scheme of the invention has the following beneficial effects:
(1) the molecular structure main chain of the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer is a C-C chain, the steric hindrance of a molecular side chain group is large, the high-temperature hydrolysis of a side chain amide group is prevented, and the temperature resistance is strong; the anionic group content in the molecular structure is high, and the salt can be dissolved in high-salinity brine; in addition, the moderately cross-linked body-type molecular structure can effectively block a seepage channel of liquid in the drilling fluid, thereby playing a role in reducing the fluid loss;
(2) the high-temperature resistant and salt resistant cross-linked polymer filtrate reducer resists temperature up to 240 ℃, and resists saturated sodium chloride, saturated sodium formate and more than 57% of potassium formate;
(3) the high-temperature-resistant salt-resistant crosslinked polymer fluid loss additive can be used in various high-temperature drilling fluid systems commonly used in oil fields, such as formate reservoir drilling fluid systems and poly-sulphur drilling fluid systems, and the addition amount of the fluid loss additive is 0.5-2.0% (w/v) (based on the total volume of the drilling fluid).
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention. The process of the present invention employs conventional methods or apparatus in the art, except as described below. The following noun terms have meanings commonly understood by those skilled in the art unless otherwise specified.
The words "preferred", "more preferred", and the like, in the present invention refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
When a range of values is disclosed herein, the range is considered to be continuous and includes both the minimum and maximum values of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range-describing features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to encompass any and all subranges subsumed therein.
According to a first aspect of the invention, the invention provides a high-temperature-resistant salt-resistant crosslinked polymer fluid loss additive, which is prepared by copolymerizing an amido-containing olefin monomer, a cyclic lactam-containing olefin monomer, a sulfonic acid group-containing olefin monomer, a carboxylic acid group-containing olefin monomer and a crosslinking agent.
Wherein the amido group-containing olefin monomer and the carboxylic acid group-containing olefin monomer are optional components.
The components of the high temperature resistant salt-resistant crosslinked polymer fluid loss additive of the present invention are described in detail below. Wherein the term "based on 100 parts of the total monomer material" means that the total amount of the materials of the monomers (such as amido group-containing olefin monomer, cyclic lactam group-containing olefin monomer, sulfonic acid group-containing olefin monomer and carboxylic acid group-containing olefin monomer) which constitute the filtrate reducer of the high temperature and salt resistant crosslinked polymer of the present invention is equally divided into 100 parts.
Amide group-containing olefin monomer
The amido-containing olefin monomer is one or more of acrylamide, methacrylamide, ethyl acrylamide, N-dimethylacrylamide, N-diethylacrylamide and N-phenylacrylamide.
The content of the amido-containing olefin monomer in the high-temperature resistant and salt-resistant cross-linked polymer fluid loss additive is 0-10 parts based on 100 parts of the total monomer substances. When the content of the amide group-containing olefin monomer is more than 10 parts, the polymer is degraded in properties due to hydrolysis of the amide group under high temperature conditions.
Olefin monomer containing cyclic lactam group
The cyclic lactam group-containing olefin monomer is one or more of vinyl butyrolactam, vinyl pyrrolidone, vinyl valerolactam and vinyl caprolactam.
In some embodiments, the cyclic lactam group-containing olefin monomer is present in the high temperature and salt resistant cross-linked polymer fluid loss additive of the present invention in an amount of 5 to 40 parts based on 100 parts total monomer. When the content of the cyclic lactam group-containing olefin monomer is less than 5 parts, the polymer cannot effectively reduce the filtration loss of brine due to a small proportion of nonionic groups in the molecular structure; when the content of the cyclic lactam group-containing olefin monomer is more than 40 parts, the polymer is completely insoluble and precipitated in the brine, and the filtrate loss of the brine cannot be controlled.
In some preferred embodiments, the cyclic lactam group-containing olefin monomer is present in the high temperature and salt resistant cross-linked polymer fluid loss additive of the present invention in an amount of 20 to 30 parts based on 100 parts of total monomer.
Sulfonic acid group-containing olefin monomer
The sulfonic group-containing olefin monomer is vinyl sulfonic acid, 2-acrylamide-2-methyl propane sulfonic acid and sodium salt, potassium salt, magnesium salt or calcium salt thereof.
Wherein the sulfonic acid group-containing olefin monomer salt is prepared by neutralizing sulfonic acid group-containing olefin monomer with equimolar amounts of sodium hydroxide, potassium hydroxide, magnesium hydroxide or calcium hydroxide.
In some embodiments, the sulfonic acid group-containing olefin monomer is present in the high temperature and salt resistant cross-linked polymer fluid loss additive of the present invention in an amount of 50 to 95 parts based on 100 parts of the total monomer material. When the content of the sulfonic acid group-containing olefin monomer is less than 50 parts, the solubility of the polymer in the brine is reduced, and the filtrate loss of the brine cannot be controlled; when the content of the sulfonic acid group-containing olefin monomer is more than 95 parts, the polymer cannot effectively reduce the amount of the saline filtration due to high proportion of ionic groups in the molecular structure.
In some preferred embodiments, the sulfonic acid group-containing olefin monomer is contained in the fluid loss additive for high temperature and salt resistant cross-linked polymers of the present invention in an amount of 60 to 80 parts based on 100 parts of the total mass of the monomers.
Carboxylic acid group-containing olefin monomer
The carboxylic group-containing olefin monomer is acrylic anhydride, acrylic acid, methacrylic acid, ethacrylic acid and sodium salt, potassium salt, magnesium salt or calcium salt thereof.
The carboxylic group-containing olefin monomer salt is prepared by neutralizing a carboxylic group-containing olefin monomer with equimolar amounts of sodium hydroxide, potassium hydroxide, magnesium hydroxide or calcium hydroxide.
In some embodiments, the carboxylic acid group-containing olefin monomer is present in the fluid loss additive of the present invention in an amount of from 0 to 40 parts based on 100 parts total monomer. When the content of the carboxylic acid group-containing olefin monomer is more than 40 parts, the polymer has a molecular structure of carboxylic acid group and Ca in the drilling fluid2+、Mg2+The sediment is separated out after the reaction, and the filtration loss of the drilling fluid cannot be controlled.
In some preferred embodiments, the carboxylic acid group-containing olefin monomer is present in the fluid loss additive of the present invention in an amount of 0 to 1 part based on 100 parts total monomer.
Crosslinking agent
The cross-linking agent generates chemical bonds between linear molecules, so that the linear molecules are connected with each other to form a net structure, and the strength of the polymer is improved.
The cross-linking agent is one or more of methylene bisacrylamide, bisphenol A diallyl ether, 1, 3-butadiene, 1, 6-heptadiene, pentaerythritol diallyl ether, pentaerythritol triallyl ether, triallyl methyl ammonium chloride, diallyl dimethyl ammonium chloride and triallyl methyl ammonium chloride.
In some embodiments, the crosslinking agent is added in an amount of 0.001 to 0.05 parts based on 100 parts total monomer. When the addition amount of the cross-linking agent is less than 0.001 part of the total mole number of the monomers, the polymer cross-linked body structure is not abundant, a filtration channel cannot be effectively blocked, and the filtration loss of saline water cannot be reduced; when the addition amount of the crosslinking agent is more than 0.05 part of the total mole number of the monomers, the solubility of the polymer is reduced due to the excessively high crosslinking degree, and even the polymer is only swollen by absorbing water, so that the saline water loss can not be effectively reduced.
The molecular structure main chain of the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer is a C-C chain, the steric hindrance of a molecular side chain group is large, the high-temperature hydrolysis of a side chain amide group is prevented, and the temperature resistance is strong; the anionic group content in the molecular structure is high, and the salt can be dissolved in high-salinity brine; in addition, the moderately cross-linked body type molecular structure can effectively block a seepage channel of liquid in the drilling fluid, thereby playing a role in reducing the fluid loss.
According to a second aspect of the present invention, the present invention also provides a preparation method of a high temperature resistant and salt resistant crosslinked polymer fluid loss additive, comprising:
(1) adding alkali into deionized water, adding a sulfonic acid group-containing olefin monomer and a carboxylic acid group-containing olefin monomer according to a ratio under stirring, and controlling the temperature of the solution to be less than or equal to 40 ℃;
(2) adding an amide-containing olefin monomer, a cyclic lactam-containing olefin monomer and a cross-linking agent according to the mixture ratio, so that the mass ratio of the total mass of the monomers to the deionized water is 10-40: 60-90, and adjusting the pH value to 6.5-10 by using alkali liquor;
(3) heating to the reaction temperature of 30-50 ℃, adding an initiator to initiate polymerization reaction, cooling the material after the reaction is finished for 2-8h, discharging, drying and crushing to obtain the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer product.
Wherein, based on 100 parts of total substances of the monomers, the amido-containing olefin monomer accounts for 0-10 parts, the cyclic lactam-containing olefin monomer accounts for 5-40 parts, the sulfonic acid group-containing olefin monomer accounts for 50-95 parts, the carboxylic acid group-containing olefin monomer accounts for 0-40 parts, and the crosslinking agent accounts for 0.001-0.05 part; preferably, 0 to 10 parts of amide-containing olefin monomer, 20 to 30 parts of cyclic lactam-containing olefin monomer, 60 to 80 parts of sulfonic acid group-containing olefin monomer, 0 to 10 parts of carboxylic acid group-containing olefin monomer and 0.001 to 0.05 part of crosslinking agent.
The weight average molecular weight of the high-temperature-resistant and salt-resistant crosslinked polymer fluid loss additive prepared by the method of the invention is 20-500 ten thousand, preferably 50-200 ten thousand. The molecular weight of the polymer can be controlled by changing the reaction conditions such as the reaction temperature and the amount of the initiator added. Specifically, the higher the reaction temperature, the lower the molecular weight of the polymerization product; the larger the amount of the initiator added, the smaller the molecular weight of the polymerization product.
In some preferred embodiments, the polymerization reaction is carried out at a temperature of 30 to 45 ℃ for a period of 4 to 6 hours.
In some preferred embodiments, the lye is an aqueous solution of sodium hydroxide, potassium hydroxide or calcium hydroxide.
In some preferred embodiments, the initiator is an oxidation system consisting of an oxidizing agent or an oxidizing agent and a reducing agent in a mass ratio of (1-2): (2-1) an oxidation-reduction system. Wherein the oxidant is one or more of sodium persulfate, potassium persulfate, ammonium persulfate, 2-azobis (2-methylpropylamidine) dihydrochloride and 2,2' -azabicyclo (2-imidazoline) dihydrochloride; the reducing agent is one or more of sodium sulfite, sodium bisulfite and sodium metabisulfite.
Further preferably, the addition amount of the initiator is 0.01 to 0.5% of the total mass of the monomers.
The polymerization reaction may be carried out under air or an inert gas atmosphere. When the reaction is carried out in an air atmosphere, since oxygen in the air has a radical trapping ability to inhibit the progress of the polymerization reaction or to extend the induction period of the polymerization reaction, a higher reaction temperature or a larger amount of initiator is required for the polymerization reaction in an air atmosphere.
Preferably, the polymerization reaction is carried out under an inert gas atmosphere. Wherein, the inert gas is nitrogen, argon or helium, and is preferably nitrogen.
In still another aspect, the invention also provides the application of the high-temperature-resistant and salt-resistant crosslinked polymer fluid loss additive in water-based drilling fluid for drilling high-temperature deep wells.
The fluid loss additive can be used in high-temperature drilling fluid systems commonly used in various oil fields, such as formate reservoir drilling fluid systems and poly-sulphur drilling fluid systems. It is added in an amount of 0.5% to 2.0% (w/v) based on the total volume of the drilling fluid.
Examples
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. Experimental procedures without specifying specific conditions in the following examples were carried out according to conventional methods and conditions. The starting materials used in the following examples are all conventionally commercially available. Wherein AM is acrylamide, DMAM is N, N-dimethylacrylamide, AMPS is 2-acrylamido-2-methylpropanesulfonic acid, NVP is vinylpyrrolidone, MBA is methylenebisacrylamide, and AA is acrylic acid.
EXAMPLE 1 crosslinked bipolymer
Dissolving 5.78g of NaOH in 152.94g of deionized water in a glass reaction bottle, and adding 29.94g of AMPS under stirring to prepare an AMPS sodium salt solution; then 6.88g of NVP and 0.10g of MBA are added and stirred to dissolve; the pH of the batch was adjusted to 9 with aqueous NaOH solution. Nitrogen was bubbled for 0.5h to remove oxygen, and the batch temperature was adjusted to 45 ℃ and 2.35g of 1% aqueous ammonium persulfate solution and 2.15g of 1% aqueous sodium bisulfite solution were added to initiate the reaction. After 4h of reaction, the material was discharged, dried in an oven at 105 ℃ for 4h and pulverized into polymer powder.
EXAMPLE 2 crosslinked terpolymer
Dissolving 4.35g of NaOH in 164.38g of deionized water in a glass reaction bottle, and adding 22.53g of AMPS under stirring to prepare AMPS sodium salt solution; then adding 1.03g of DMAM, 4.31g of NVP and 0.049g of methylene bisacrylamide, and stirring to dissolve; the pH of the batch was adjusted to 7 with aqueous NaOH. Nitrogen was bubbled for 0.5h to remove oxygen, and the batch temperature was adjusted to 40 ℃ and 1.80g of 1% aqueous ammonium persulfate solution and 1.64g of 1% aqueous sodium bisulfite solution were added to initiate the reaction. After 6h of reaction, the material was discharged, dried in an oven at 105 ℃ for 4h and pulverized into polymer powder.
Example 3 Cross-Linked tetrapolymer
Dissolving 4.04g of NaOH in 138.28g of deionized water in a glass reaction bottle, and adding 7.29g of AA while stirring to prepare an AA sodium salt solution; then 31.18g of 50% AMPS sodium salt aqueous solution, 4.19g of AM, 10.72g of NVP and 0.25g of pentaerythritol triallyl ether are added and stirred to dissolve; the pH of the batch was adjusted to 8 with aqueous NaOH. Nitrogen was bubbled for 0.5h to remove oxygen, and the batch temperature was adjusted to 30 ℃ and 2.0g of 1% aqueous ammonium persulfate solution and 2.0g of 1% aqueous sodium bisulfite solution were added to initiate the reaction. After 8h of reaction, the material was discharged, dried in an oven at 105 ℃ for 4h and pulverized into polymer powder.
Comparative example 1 Linear binary copolymer
Methylene bisacrylamide, a crosslinking agent, was not added as in example 1.
Comparative example 2 Linear terpolymer
Methylene bisacrylamide, a crosslinking agent, was not added as in example 2.
Comparative example 3 Linear tetrapolymer
As in example 3, pentaerythritol triallyl ether was not added as a crosslinking agent.
Performance evaluation:
1. preparation of potassium formate saline with different densities
Respectively measuring 250mL, 210mL, 167.5mL and 99mL of seawater in 4 high-stirring cups, respectively adding 205g, 280g, 357g and 478g of potassium formate, and stirring at high speed for 20min to obtain the final product with density of 1.3g/cm3、1.4g/cm3、1.5g/cm3Potassium formate brine and saturated potassium formate brine.
2. Preparation of saturated sodium chloride brine
310.8mL of seawater is measured in a high stirring cup, 109.2g of sodium chloride is added, and the mixture is stirred at a high speed for 20min to obtain saturated sodium chloride brine.
3. Preparation of saturated sodium formate brine
238mL of seawater is measured in a high stirring cup, 238g of sodium formate is added, and the mixture is stirred at a high speed for 20min to obtain saturated sodium formate brine.
4. Evaluation of filtrate loss reduction in brine
Adding 3.5g of polymer fluid loss additive into 350mL of saline water with different concentrations and types, stirring at a high speed for 20min, testing the liquid viscosity by using a six-speed viscometer, and testing the liquid API (normal temperature, 100psi) fluid loss by using an API fluid loss meter;
filling the liquid into an aging tank, filling nitrogen with the pressure of more than 400psi, sealing the aging tank, placing the aging tank in a high-temperature roller furnace preheated in advance, rolling for 16 hours while heating, taking out, cooling, releasing pressure, pouring into a high stirring cup, stirring for 20min, testing the viscosity of the liquid by using a six-speed viscometer, and testing the API (normal temperature, 100psi) filtration loss of the liquid by using an API filtration loss tester.
1.3g/cm of a sample containing 1% of the polymer3The performance of potassium formate before and after hydrothermal rolling is compared and tested with foreign high temperature polymer DrisTemp and DrisCal D. The results are as follows:
| serial number | Sample name | API fluid loss before hot roll | API filtration loss after 210 ℃ hot rolling |
| 1 | Blank space | All lose | All lose |
| 2 | DrisTemp | All lose | All lose |
| 3 | DrisCal D | All lose | All lose |
| 4 | Example 1 sample | 5.3 | 6.0 |
| 5 | Example 2 sample | 4.8 | 3.0 |
| 6 | Example 3 sample | 3.9 | 4.4 |
| 7 | Comparative example 1 sample | All lose | All lose |
| 8 | Comparative example 2 sample | All lose | All lose |
| 9 | Comparative example 3 sample | All lose | All lose |
From the above table, it is understood that the crosslinked polymers of the present invention (examples 1, 2, and 3) can effectively control the filtration loss before and after hydrothermal rolling of potassium formate salt, while the linear polymers (comparative examples 1, 2, and 3) cannot control the filtration loss before and after hydrothermal rolling of potassium formate salt.
1% of the sample of example 2 was added to saturated sodium chloride, saturated sodium formate and 57% potassium formate brine, respectively, and tested for API fluid loss before and after 16h at 210 ℃. The experimental results are as follows:
| serial number | Concentration of brine | API fluid loss before hot roll | API filtration loss after 210 ℃ hot rolling |
| 1 | Saturated sodium chloride | 8.8 | 10.9 |
| 2 | Saturated sodium formate | 6.0 | 3.1 |
| 3 | 57% Potassium formate | 6.8 | 5.3 |
As can be seen from the above table, the crosslinked polymer of the present invention (example 2) can effectively control the fluid loss before and after the hot rolling of saturated sodium chloride, saturated sodium formate, and 57% potassium formate brine.
1% of the sample of example 2 was added to 57% potassium formate salt water and tested for API fluid loss after hot rolling for 16h at 210 ℃/220 ℃/230 ℃/240 ℃. The experimental results are as follows:
| serial number | Hot rolling temperature | API fluid loss before hot roll | API fluid loss after hot rolling |
| 1 | 210 | 6.8 | 5.3 |
| 2 | 220 | 5.8 | 5.6 |
| 3 | 230 | 4.6 | 5.2 |
| 4 | 240 | 5.5 | 8.0 |
As can be seen from the above table, the sample of example 2 is resistant to 240 ℃ in 57% potassium formate brine.
The present invention has been disclosed in the foregoing in terms of preferred embodiments, but it will be understood by those skilled in the art that these embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions that are equivalent to these embodiments are deemed to be within the scope of the claims of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined in the claims.
Claims (10)
1. The high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer is characterized by being prepared by copolymerizing 0-10 parts of amide-containing olefin monomer, 5-40 parts of cyclic lactam-containing olefin monomer, 50-95 parts of sulfonic group-containing olefin monomer, 0-40 parts of carboxylic group-containing olefin monomer and 0.001-0.05 part of cross-linking agent in parts by mole; wherein the total mole fraction of each monomer is 100 parts.
2. The fluid loss additive of claim 1, which is prepared by copolymerizing, in mole percent, 0 to 10 parts of an amide-containing olefin monomer, 20 to 30 parts of a cyclic lactam-containing olefin monomer, 60 to 80 parts of a sulfonic acid group-containing olefin monomer, 0 to 10 parts of a carboxylic acid group-containing olefin monomer, and 0.001 to 0.05 part of a crosslinking agent; wherein the total mole fraction of each monomer is 100 parts.
3. The high temperature and salt resistant crosslinked polymer fluid loss additive of claim 1 wherein the amide group-containing olefin monomer is one or more of acrylamide, methacrylamide, ethylacrylamide, N-dimethylacrylamide, N-diethylacrylamide, N-phenylacrylamide; the cyclic lactam-containing olefin monomer is one or more of vinyl butyrate lactam, vinyl pyrrolidone, vinyl valerolactam and vinyl caprolactam.
4. The high temperature and salt resistant crosslinked polymer fluid loss additive of claim 1 wherein the sulfonic acid group containing olefin monomers are vinyl sulfonic acid and 2-acrylamido-2-methylpropane sulfonic acid and their sodium, potassium, magnesium or calcium salts; the carboxylic group-containing olefin monomer is acrylic anhydride, acrylic acid, methacrylic acid, ethacrylic acid and sodium salt, potassium salt, magnesium salt or calcium salt thereof.
5. The high temperature and salt resistant crosslinked polymer fluid loss additive of claim 1, wherein the crosslinking agent is one or more of methylene bis acrylamide, bisphenol a diallyl ether, 1, 3-butadiene, 1, 6-heptadiene, pentaerythritol diallyl ether, pentaerythritol triallyl ether, triallylmethylammonium chloride, diallyldimethylammonium chloride, triallylmethylammonium chloride.
6. The high temperature and salt resistant crosslinked polymer fluid loss additive of claim 1, wherein the weight average molecular weight of the fluid loss additive is 20-500, preferably 50-200, ten thousand.
7. The method for preparing the high temperature and salt resistant crosslinked polymer fluid loss additive of any one of claims 1-6, comprising:
(1) adding alkali into deionized water, adding a sulfonic acid group-containing olefin monomer and a carboxylic acid group-containing olefin monomer according to a ratio under stirring, and controlling the temperature of the solution to be less than or equal to 40 ℃;
(2) adding an amide-containing olefin monomer, a cyclic lactam-containing olefin monomer and a cross-linking agent according to the mixture ratio, so that the mass ratio of the total mass of the monomers to the deionized water is 10-40: 60-90, and adjusting the pH value to 6.5-10 by using alkali liquor;
(3) heating to 30-50 ℃, adding an initiator to initiate polymerization reaction, cooling the material after 2-8h, discharging, drying and crushing to obtain the high-temperature-resistant salt-resistant cross-linked polymer filtrate reducer product.
8. The preparation method of the high temperature and salt resistant crosslinked polymer fluid loss additive according to claim 7, wherein the initiator is an oxidation system consisting of an oxidant or an oxidant and a reducing agent in a mass ratio of (1-2): (2-1) an oxidation-reduction system.
9. The method of claim 8, wherein the oxidizing agent is one or more of sodium persulfate, potassium persulfate, ammonium persulfate, 2-azobis (2-methylpropylamidine) dihydrochloride, and 2,2' -azabicyclo (2-imidazoline) dihydrochloride; the reducing agent is one or more of sodium sulfite, sodium bisulfite and sodium metabisulfite.
10. Use of the high temperature and salt resistant cross-linked polymer fluid loss additive of any one of claims 1 to 9 in a water-based drilling fluid for drilling high temperature deep wells.
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| CN115572342A (en) * | 2022-10-09 | 2023-01-06 | 淮阴工学院 | Copolymer cement additive with conjugated cyclic high-temperature resistance and preparation method thereof |
| CN115850570A (en) * | 2022-10-26 | 2023-03-28 | 长江大学 | Hyperbranched polymer microsphere fluid loss additive as well as preparation method and application thereof |
| CN116948093A (en) * | 2023-07-28 | 2023-10-27 | 四川盛年同缔实业有限公司 | Environment-friendly polymer high-temperature-resistant and composite salt-resistant filtrate reducer and preparation method thereof |
| CN117624457A (en) * | 2024-01-24 | 2024-03-01 | 西南石油大学 | High-temperature-resistant high-salt calcium filtrate reducer and preparation method and application thereof |
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| CN115572342A (en) * | 2022-10-09 | 2023-01-06 | 淮阴工学院 | Copolymer cement additive with conjugated cyclic high-temperature resistance and preparation method thereof |
| CN115850570A (en) * | 2022-10-26 | 2023-03-28 | 长江大学 | Hyperbranched polymer microsphere fluid loss additive as well as preparation method and application thereof |
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| CN117624457A (en) * | 2024-01-24 | 2024-03-01 | 西南石油大学 | High-temperature-resistant high-salt calcium filtrate reducer and preparation method and application thereof |
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