CN114507515A - Supramolecular gel plugging agent for fractured stratum and preparation method and application thereof - Google Patents
Supramolecular gel plugging agent for fractured stratum and preparation method and application thereof Download PDFInfo
- Publication number
- CN114507515A CN114507515A CN202210154918.6A CN202210154918A CN114507515A CN 114507515 A CN114507515 A CN 114507515A CN 202210154918 A CN202210154918 A CN 202210154918A CN 114507515 A CN114507515 A CN 114507515A
- Authority
- CN
- China
- Prior art keywords
- plugging agent
- combination
- monomer
- methacrylate
- supramolecular gel
- 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.)
- Granted
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000178 monomer Substances 0.000 claims abstract description 138
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 119
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 66
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 57
- 238000007334 copolymerization reaction Methods 0.000 claims abstract description 46
- 239000006184 cosolvent Substances 0.000 claims abstract description 40
- 239000003999 initiator Substances 0.000 claims abstract description 40
- 239000004094 surface-active agent Substances 0.000 claims abstract description 37
- 239000002994 raw material Substances 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 125000000524 functional group Chemical group 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims description 53
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 38
- 230000015572 biosynthetic process Effects 0.000 claims description 37
- 238000005755 formation reaction Methods 0.000 claims description 37
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 34
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000011259 mixed solution Substances 0.000 claims description 31
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical compound C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 28
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 22
- 238000005553 drilling Methods 0.000 claims description 20
- HMZGPNHSPWNGEP-UHFFFAOYSA-N octadecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)=C HMZGPNHSPWNGEP-UHFFFAOYSA-N 0.000 claims description 20
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 20
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 claims description 19
- 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 19
- ZNAOFAIBVOMLPV-UHFFFAOYSA-N hexadecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCCOC(=O)C(C)=C ZNAOFAIBVOMLPV-UHFFFAOYSA-N 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 17
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical group [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 17
- 235000019270 ammonium chloride Nutrition 0.000 claims description 17
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 16
- MMYYTPYDNCIFJU-UHFFFAOYSA-N calix[6]arene Chemical compound C1C(C=2)=CC=CC=2CC(C=2)=CC=CC=2CC(C=2)=CC=CC=2CC(C=2)=CC=CC=2CC(C=2)=CC=CC=2CC2=CC=CC1=C2 MMYYTPYDNCIFJU-UHFFFAOYSA-N 0.000 claims description 16
- GYVGXEWAOAAJEU-UHFFFAOYSA-N n,n,4-trimethylaniline Chemical compound CN(C)C1=CC=C(C)C=C1 GYVGXEWAOAAJEU-UHFFFAOYSA-N 0.000 claims description 16
- 229920001661 Chitosan Polymers 0.000 claims description 15
- 229920000858 Cyclodextrin Polymers 0.000 claims description 15
- 239000001116 FEMA 4028 Substances 0.000 claims description 15
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 claims description 15
- 235000011175 beta-cyclodextrine Nutrition 0.000 claims description 15
- 229960004853 betadex Drugs 0.000 claims description 15
- ACWKAVFAONSRKJ-UHFFFAOYSA-M hexadecyl-dimethyl-prop-2-enylazanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+](C)(C)CC=C ACWKAVFAONSRKJ-UHFFFAOYSA-M 0.000 claims description 15
- 239000011780 sodium chloride Substances 0.000 claims description 15
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 14
- 229960003237 betaine Drugs 0.000 claims description 14
- -1 cyclodipeptide Chemical compound 0.000 claims description 14
- 235000010413 sodium alginate Nutrition 0.000 claims description 14
- 239000000661 sodium alginate Substances 0.000 claims description 14
- 229940005550 sodium alginate Drugs 0.000 claims description 14
- FEBUJFMRSBAMES-UHFFFAOYSA-N 2-[(2-{[3,5-dihydroxy-2-(hydroxymethyl)-6-phosphanyloxan-4-yl]oxy}-3,5-dihydroxy-6-({[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}methyl)oxan-4-yl)oxy]-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl phosphinite Chemical compound OC1C(O)C(O)C(CO)OC1OCC1C(O)C(OC2C(C(OP)C(O)C(CO)O2)O)C(O)C(OC2C(C(CO)OC(P)C2O)O)O1 FEBUJFMRSBAMES-UHFFFAOYSA-N 0.000 claims description 13
- 229920002305 Schizophyllan Polymers 0.000 claims description 13
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 12
- MSBXTPRURXJCPF-DQWIULQBSA-N cucurbit[6]uril Chemical compound N1([C@@H]2[C@@H]3N(C1=O)CN1[C@@H]4[C@@H]5N(C1=O)CN1[C@@H]6[C@@H]7N(C1=O)CN1[C@@H]8[C@@H]9N(C1=O)CN([C@H]1N(C%10=O)CN9C(=O)N8CN7C(=O)N6CN5C(=O)N4CN3C(=O)N2C2)C3=O)CN4C(=O)N5[C@@H]6[C@H]4N2C(=O)N6CN%10[C@H]1N3C5 MSBXTPRURXJCPF-DQWIULQBSA-N 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 12
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- 239000002202 Polyethylene glycol Substances 0.000 claims description 8
- 229920001223 polyethylene glycol Polymers 0.000 claims description 8
- 229920002338 polyhydroxyethylmethacrylate Polymers 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate group Chemical group S(=O)(=O)([O-])[O-] QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 8
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 7
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 6
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 235000021355 Stearic acid Nutrition 0.000 claims description 6
- 229940095564 anhydrous calcium sulfate Drugs 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000004202 carbamide Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- GMSCBRSQMRDRCD-UHFFFAOYSA-N dodecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCOC(=O)C(C)=C GMSCBRSQMRDRCD-UHFFFAOYSA-N 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 6
- 239000008117 stearic acid Substances 0.000 claims description 6
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims description 5
- KGIGUEBEKRSTEW-UHFFFAOYSA-N 2-vinylpyridine Chemical compound C=CC1=CC=CC=N1 KGIGUEBEKRSTEW-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
- 238000001035 drying Methods 0.000 claims description 5
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 claims description 5
- 229940047670 sodium acrylate Drugs 0.000 claims description 5
- LBUJPTNKIBCYBY-UHFFFAOYSA-N 1,2,3,4-tetrahydroquinoline Chemical compound C1=CC=C2CCCNC2=C1 LBUJPTNKIBCYBY-UHFFFAOYSA-N 0.000 claims description 4
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 claims description 4
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 claims description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 4
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 claims description 4
- 238000007872 degassing Methods 0.000 claims description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 4
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 4
- 239000000194 fatty acid Substances 0.000 claims description 4
- 229930195729 fatty acid Natural products 0.000 claims description 4
- KTWOOEGAPBSYNW-UHFFFAOYSA-N ferrocene Chemical compound [Fe+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 KTWOOEGAPBSYNW-UHFFFAOYSA-N 0.000 claims description 4
- ZQMHJBXHRFJKOT-UHFFFAOYSA-N methyl 2-[(1-methoxy-2-methyl-1-oxopropan-2-yl)diazenyl]-2-methylpropanoate Chemical compound COC(=O)C(C)(C)N=NC(C)(C)C(=O)OC ZQMHJBXHRFJKOT-UHFFFAOYSA-N 0.000 claims description 4
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 4
- 239000005725 8-Hydroxyquinoline Substances 0.000 claims description 3
- MNOILHPDHOHILI-UHFFFAOYSA-N Tetramethylthiourea Chemical compound CN(C)C(=S)N(C)C MNOILHPDHOHILI-UHFFFAOYSA-N 0.000 claims description 3
- 229940045110 chitosan Drugs 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229960003540 oxyquinoline Drugs 0.000 claims description 3
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 claims description 3
- MFWFDRBPQDXFRC-LNTINUHCSA-N (z)-4-hydroxypent-3-en-2-one;vanadium Chemical compound [V].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O MFWFDRBPQDXFRC-LNTINUHCSA-N 0.000 claims description 2
- XEZNGIUYQVAUSS-UHFFFAOYSA-N 18-crown-6 Chemical compound C1COCCOCCOCCOCCOCCO1 XEZNGIUYQVAUSS-UHFFFAOYSA-N 0.000 claims description 2
- CYEJMVLDXAUOPN-UHFFFAOYSA-N 2-dodecylphenol Chemical compound CCCCCCCCCCCCC1=CC=CC=C1O CYEJMVLDXAUOPN-UHFFFAOYSA-N 0.000 claims description 2
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
- UUORTJUPDJJXST-UHFFFAOYSA-N n-(2-hydroxyethyl)prop-2-enamide Chemical compound OCCNC(=O)C=C UUORTJUPDJJXST-UHFFFAOYSA-N 0.000 claims description 2
- XQPVIMDDIXCFFS-UHFFFAOYSA-N n-dodecylprop-2-enamide Chemical compound CCCCCCCCCCCCNC(=O)C=C XQPVIMDDIXCFFS-UHFFFAOYSA-N 0.000 claims description 2
- 238000005457 optimization Methods 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 2
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 2
- 229950008882 polysorbate Drugs 0.000 claims description 2
- 229920000136 polysorbate Polymers 0.000 claims description 2
- 239000001103 potassium chloride Substances 0.000 claims description 2
- 235000011164 potassium chloride Nutrition 0.000 claims description 2
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 claims description 2
- 239000012266 salt solution Substances 0.000 claims description 2
- 235000010265 sodium sulphite Nutrition 0.000 claims description 2
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 claims description 2
- UFQDKRWQSFLPQY-UHFFFAOYSA-N 4,5-dihydro-1h-imidazol-3-ium;chloride Chemical compound Cl.C1CN=CN1 UFQDKRWQSFLPQY-UHFFFAOYSA-N 0.000 claims 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 claims 1
- 230000035484 reaction time Effects 0.000 claims 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims 1
- 229920002554 vinyl polymer Polymers 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 8
- 230000004044 response Effects 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000002441 reversible effect Effects 0.000 abstract description 4
- 239000000499 gel Substances 0.000 description 141
- 238000012360 testing method Methods 0.000 description 22
- 239000000243 solution Substances 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 17
- 206010017076 Fracture Diseases 0.000 description 15
- 208000010392 Bone Fractures Diseases 0.000 description 13
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- 150000003839 salts Chemical class 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 229920000642 polymer Polymers 0.000 description 9
- 230000009471 action Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000007863 gel particle Substances 0.000 description 3
- 230000015784 hyperosmotic salinity response Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000003211 malignant effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000001338 self-assembly Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- VYBHLZOLHCQLHT-UHFFFAOYSA-N 1-(2-methylpropyl)-4,5-dihydroimidazole hydrochloride Chemical compound Cl.C(C(C)C)N1C=NCC1 VYBHLZOLHCQLHT-UHFFFAOYSA-N 0.000 description 1
- 208000013201 Stress fracture Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 125000003010 ionic group Chemical group 0.000 description 1
- 150000002500 ions Chemical group 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- RZJSUWQGFCHNFS-UHFFFAOYSA-N monoisobutyl phthalate Chemical compound CC(C)COC(=O)C1=CC=CC=C1C(O)=O RZJSUWQGFCHNFS-UHFFFAOYSA-N 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229940093430 polyethylene glycol 1500 Drugs 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000019722 synbiotics Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009974 thixotropic effect Effects 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/44—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing organic binders only
-
- 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
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Medicinal Preparation (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a supramolecular gel plugging agent for fractured strata and a preparation method and application thereof. The supramolecular gel plugging agent comprises the following raw materials in percentage by mass: 18-45% of copolymerization monomer, 0.5-6.0% of surfactant, 0.1-2.0% of initiator, 0.1-2.0% of cosolvent, 0.05-0.5% of accelerator, 0.5-5% of saline solution and the balance of water; the copolymerization reaction monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule. The invention also provides a preparation method of the plugging agent. The gel plugging agent disclosed by the invention not only has the advantage of good matching property between a gel-type leak-proof plugging material and cracks, but also has high temperature resistance and pressure resistance and unique dynamic reversible characteristics, and can be used for effectively plugging to form an integral compact plugging layer; meanwhile, the supramolecular gel plugging agent has excellent mechanical property and environmental response capability.
Description
Technical Field
The invention relates to a supramolecular gel plugging agent for fractured formations and a preparation method and application thereof, belonging to the technical field of drilling fluid plugging.
Background
At present, in complex oil and gas reservoir drilling engineering, the problem of lost circulation becomes more prominent, and particularly the problem of malignant loss of fractured formations is solved. Lost circulation often occurs in comparatively developed strata such as holes, seams, and cavities, and is classified into porosity loss, fracture loss, and karst cave loss according to leakage passage. Most lost circulation is associated with fractures. Statistically, the cost of plugging fractured loss accounts for more than 90% of the total cost of lost circulation. Due to the serious obstruction to the drilling work and the serious threat to the drilling safety, the leakage stoppage of the drilling fluid becomes a 'neck' problem which restricts the further development of the exploration and development in China. Therefore, solving the problem of malignant leakage in the drilling process has become a critical issue in the petroleum industry.
The plugging material is the basis and key of the plugging technology. The conventional plugging material has a good effect in treating permeable and medium-small fracture well leakage, but has poor adaptability to large fracture or fracture-cave plugging and low success rate of primary plugging. The fiber and the rigid material are commonly used plugging materials in oil fields, have poor compatibility with cracks, are easy to cause door sealing phenomenon, and the plugging effect is still to be improved. The polymer gel plugging agent is one of common and effective plugging agents, and a certain amount of gel plugging agent solution is injected into a leakage layer position, and cracks are plugged after the gel plugging agent solution is solidified, so that the effect of isolating drilling fluid and formation fluid is achieved. Wherein, the quality of the gel plugging agent is the key for successful plugging. The gel plugging agent adopted at present has a better effect in field application, but along with the deep development of oil and gas exploration and development, high temperature and high pressure become one of the main problems facing well drilling plugging, and higher requirements are provided for the temperature resistance, salt tolerance and pressure bearing plugging performance of the gel plugging agent.
In order to solve the above problems, chinese patent document CN111961452A provides a thixotropic gel plugging agent with high temperature resistance and high strength, which has the advantages of high temperature resistance, high strength and thixotropy, but the gel forming controllability needs to be improved; chinese patent document CN110734751A provides a high-temperature-resistant composite reinforced gel plugging agent which has the characteristics of high temperature resistance and delayed expansion, but has insufficient salt resistance and pressure bearing capacity; chinese patent document CN112480886A provides a polymer gel composite plugging agent which has good water-swelling property, but is deficient in temperature resistance, salt resistance and gelling strength.
The supermolecule gel forms a gel network system with reversible structure and high performance characteristic under the self-assembly action of non-covalent bond interaction. The supermolecule gel plugging agent not only has the advantage of good matching property of the conventional gel plugging material and cracks, but also has excellent temperature resistance, salt tolerance and shearing thixotropy, can realize full filling of a leakage space, has high mechanical strength, can realize long-term plugging of a leakage layer, and can effectively solve the defects of the conventional plugging material.
Therefore, there is a need to develop a supramolecular gel plugging agent with both mechanical properties and environmental response capability to solve the problem of malignant leakage of fractured high-temperature and high-salinity stratum encountered in the drilling process.
Disclosure of Invention
Aiming at the defects of the prior art, in particular to the problems of complex preparation process, insufficient pressure-bearing plugging capacity, poor temperature resistance and salt tolerance and the like of the conventional gel leakage prevention/plugging material used for the fractured formation, the invention provides a supramolecular gel plugging agent for the fractured formation, and a preparation method and application thereof.
The supermolecule gel plugging agent is a gel plugging agent which is formed based on non-covalent bond interaction and has excellent mechanical property and outstanding environmental response capability, not only has the advantage of good matching property of gel-type leakage-proof plugging materials and cracks, but also increases the temperature resistance and pressure resistance of gel through supermolecule structural design, has unique dynamic reversible characteristic, and can effectively perform plugging to form an integral compact plugging layer; meanwhile, the supermolecule gel plugging agent has excellent mechanical property and environmental response capability, multiple hydrogen bond structural units are introduced to a hydrophobic chain of the hydrophobic association polymer, and a zwitter ion group is introduced to a hydrophilic end of the hydrophobic association polymer to form the supermolecule gel with high strength and environmental response capability, and the supermolecule gel can be adaptively matched with a crack with a complex scale, so that a leakage space is fully filled, and long-term stable plugging is realized.
The technical scheme of the invention is as follows:
a supramolecular gel plugging agent for fractured strata comprises the following raw materials in percentage by mass: 18-45% of copolymerization monomer, 0.5-6.0% of surfactant, 0.1-2.0% of initiator, 0.1-2.0% of cosolvent, 0.05-0.5% of accelerator, 0.5-5% of saline solution and the balance of water; the copolymerization reaction monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule.
According to the invention, the preferable supermolecule gel plugging agent for fractured formations comprises the following raw materials in percentage by mass: 24-35% of copolymerization reaction monomer, 3-5% of surfactant, 0.4-1% of initiator, 0.5-1% of cosolvent, 0.2-0.5% of accelerator, 1-3% of saline solution and the balance of water.
According to the invention, the mass ratio of the hydrophilic monomer, the hydrophobic monomer and the functionalized group molecule in the copolymerization reaction monomer is 6-8:1-3:1, and is further preferably 7:2: 1.
According to the invention, the hydrophilic monomer is preferably a combination of two or more of acrylamide, acrylic acid, methacrylic acid, sodium acrylate, polyethylene glycol, N-isopropyl acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, hexadecyl dimethyl allyl ammonium chloride, N-dodecyl acrylamide, N-vinyl pyrrolidone, 2-vinyl pyridine and N-hydroxyethyl acrylamide; more preferably, it is a combination of two or more of acrylamide, acrylic acid, methacrylic acid, sodium acrylate, polyethylene glycol, N-isopropylacrylamide, 2-acrylamido-2-methylpropanesulfonic acid, hexadecyldimethylallylammonium chloride, 2-vinylpyridine, and N-vinylpyrrolidone.
According to the invention, the hydrophobic monomer is preferably a combination of two or more of octadecyl methacrylate, methyl methacrylate, butyl methacrylate, hexadecyl methacrylate, polyhydroxyethyl methacrylate, dimethylaminoethyl methacrylate, 2-ethyl methacrylate, beta-hydroxyethyl methacrylate, lauryl methacrylate, 4-trifluoromethyl vinyl carbonate (CAS number: 167951-80-6) and 4-methyl styrene; more preferably, it is a combination of two or more of octadecyl methacrylate, lauryl methacrylate, hexadecyl methacrylate, butyl methacrylate, dimethylaminoethyl methacrylate, 4-methylstyrene and polyhydroxyethyl methacrylate.
According to the invention, the functionalized group molecule is preferably one or a combination of more than two of scleroglucan, chitosan, sodium alginate, 18-crown-6, cyclodipeptide, beta-cyclodextrin, calix [6] arene, diethoxy column [5] arene and cucurbituril; more preferably two or more than three of scleroglucan, chitosan, sodium alginate, beta-cyclodextrin, calix [6] arene and cucurbituril.
According to the invention, the surfactant is preferably one or a combination of more than two of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, dodecyl phenol polyoxyethylene ether, stearic acid, sorbitan fatty acid, betaine and polysorbate.
According to the invention, the initiator is preferably one or a combination of more than two of diisopropyl peroxydicarbonate, tert-butyl peroxybenzoate, cumene hydroperoxide, potassium persulfate, ammonium persulfate, azobis (isobutyl) phthalate, dimethyl azobisisobutyrate, azobis (isobutyl) imidazoline hydrochloride and sodium sulfite.
According to the invention, the cosolvent is sulfate and/or nitrogen-containing compound, and is further preferably a combination of sulfate and nitrogen-containing compound, wherein the mass ratio of the sulfate to the nitrogen-containing compound is 1-2: 1; the sulfate is anhydrous sodium sulfate or anhydrous calcium sulfate, and the nitrogen-containing compound is urea or ammonium chloride.
According to the invention, the promoter is preferably one or the combination of more than two of 1, 2-bis (dimethylamino) ethane, triethylene diamine, ferric trichloride, tetramethyl thiourea, vanadium acetylacetonate, acetylacetone, N-dimethyl-p-toluidine, triethylamine, tetrahydroquinoline, 8-hydroxyquinoline and ferrocene; further preferred is a combination of triethylenediamine and N, N-dimethyl-p-toluidine.
According to the invention, the brine solution is preferably a sodium chloride aqueous solution and/or a potassium chloride aqueous solution, and is further preferably a sodium chloride aqueous solution; the concentration of the aqueous salt solution is 0.5 to 5mol/L, and more preferably 2 to 3 mol/L.
According to the invention, the preparation method of the supramolecular gel plugging agent for the fractured stratum comprises the following steps:
(1) adding hydrophilic monomers in copolymerization reaction monomers into water, and uniformly stirring to obtain a mixed solution A;
(2) adding a hydrophobic monomer in the copolymerization reaction monomer into the mixed solution A, and uniformly stirring to obtain a mixed solution B;
(3) adding the functionalized group molecules and the surfactant into the mixed solution B, and uniformly stirring to obtain a mixed solution C;
(4) adding an initiator and a cosolvent into the mixed solution C, and stirring until the initiator and the cosolvent are completely dissolved to obtain a mixed solution D;
(5) adding an accelerant and a saline solution into the mixed solution D, and uniformly stirring to obtain a mixed solution E;
(6) deoxidizing and degassing the mixed solution E, and then standing for reaction to obtain supramolecular gel; and drying and crushing the supramolecular gel to obtain the supramolecular gel plugging agent for the fractured stratum.
Preferably, according to the invention, in step (1), the stirring temperature is 20-45 ℃, and more preferably 25-30 ℃; the stirring speed is 300-1000 rpm, and more preferably 400-600 rpm; the stirring time is 10 to 40 minutes, and more preferably 20 to 30 minutes.
Preferably, in step (2), the stirring temperature is 20-50 ℃, and more preferably 23-28 ℃; the stirring speed is 200-800 rpm, and more preferably 450-580 rpm; the stirring time is 5 to 30 minutes, and more preferably 24 to 28 minutes.
Preferably, in step (3), the stirring temperature is 30-50 ℃, and more preferably 35-40 ℃; the stirring speed is 400-1000 rpm, and more preferably 500-700 rpm; the stirring time is 30 to 60 minutes, and more preferably 40 to 50 minutes.
Preferably, in step (4), the stirring temperature is 30-70 ℃, and more preferably 40-50 ℃; the stirring speed is 400-800 r/min, and more preferably 500-600 r/min; the stirring time is 20 to 40 minutes, and more preferably 25 to 35 minutes.
Preferably, in step (5), the stirring temperature is 30-70 ℃, and more preferably 40-60 ℃; the stirring speed is 400-800 r/min, and more preferably 450-550 r/min; the stirring time is 20 to 40 minutes, and more preferably 25 to 30 minutes.
According to the invention, in the step (6), the oxygen removal and degassing mode is that nitrogen is introduced and vacuum pumping is carried out under reduced pressure; the temperature of the standing reaction is 50-80 ℃, and the further optimization is 60-65 ℃; the time for the standing reaction is 5 to 9 hours, and more preferably 6 to 7 hours.
According to the present invention, the drying in step (6) is preferably vacuum drying at 55-80 ℃ for 20-30 hours, and more preferably vacuum drying at 70-75 ℃ for 24-26 hours. The pulverization is to pulverize the supermolecule gel into particles with different diameters by a pulverizer according to different requirements.
According to the invention, the supramolecular gel plugging agent for the fractured stratum is applied to the plugging of the fractured stratum.
According to the invention, the supermolecule gel plugging agent for fractured strata is preferably used as a plugging material for plugging drilling fluid, the addition amount of the supermolecule gel plugging agent is 2-5% of the mass of the drilling fluid, and the supermolecule gel plugging agent can be injected in a while-drilling injection mode.
The preparation principle of the invention is as follows:
the invention adopts a free radical polymerization method to form the supermolecule gel which is suitable for fractured formations and is based on non-covalent bond interaction through self-assembly among copolymerization reaction monomers. The main raw materials of the copolymerization reaction monomer are hydrophilic monomer, hydrophobic monomer and functional group molecule. The hydrophilic monomer and the hydrophobic monomer can generate hydrophobic association under the action of the surfactant to form a hydrophobic association polymer, a small amount of hydrophobic groups are carried on the molecular chain of the hydrophobic association polymer, and a supermolecular structure with a three-dimensional network can be formed in a solution, so that the polymer has better temperature resistance, salt resistance and dilution resistance under lower concentration and lower molecular weight. Through the design of a supramolecular structure, multiple hydrogen bond structural units formed in the polymerization process of the comonomer are introduced to a hydrophobic chain of the hydrophobic association polymer, and a zwitter-ion group is introduced to a hydrophilic end of the hydrophobic association polymer to form the supramolecular gel with unique dynamic reversible characteristics and self-repairing capability, so that the mechanical strength of the supramolecular gel can be effectively improved. Meanwhile, the functional group molecules are intertwined with each other, so that the mechanical property and the environmental response capability of the gel can be improved, and the supramolecular gel formed based on the host-guest action can keep better uniformity and environmental response within a certain scale range.
The invention has the following technical characteristics and beneficial effects:
1. the supermolecule gel for fractured strata is used as a plugging material for plugging drilling fluid, granular gel is injected into a leakage layer while drilling, charged particles in gel particles are adsorbed on the surface of a rock under the action of static electricity to plug micro-fracture pores or a high-permeability layer, and the high-strength supermolecule gel is formed through extrusion deformation, water absorption expansion, filling and stacking and other actions, so that the pressure bearing capacity of the strata can be effectively improved, and intelligent plugging is realized.
2. The supermolecule gel for the fractured stratum has excellent mechanical property and environmental response capability, ionic groups on the surfaces of gel particles can be adsorbed on the surface of stratum rock through hydrogen bonds and electrostatic action, and are mutually connected through the actions of aggregation, extrusion, filling and the like to form a chain-shaped blocking layer, and then the ionic bonds are formed through mutual contact among the gel particles, so that the supermolecule gel with the self-repairing capability is constructed, and fracture pores can be effectively blocked.
3. The supermolecule gel for the fractured stratum forms a three-dimensional network structure under the hydrophobic association effect, can be self-adapted to the severe and complicated fractured stratum such as high temperature, high salt and the like, has good compatibility and strong scouring resistance, and can form a high-strength plugging layer in the fractured stratum.
4. The supermolecule gel plugging agent suitable for fractured strata can effectively overcome the defects of the conventional plugging material, has excellent high-temperature resistance and shearing thixotropy, can be adaptively matched with fractures with complex dimensions, realizes full filling of a leakage space, achieves long-term stable plugging, and is simple and feasible in preparation method, convenient in production operation and small in environmental pollution.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other examples, which may be modified or appreciated by those of ordinary skill in the art based on the examples given herein, are intended to be within the scope of the present invention.
The raw materials used in the examples are conventional raw materials and can be obtained commercially; the methods are prior art unless otherwise specified.
The polyethylene glycol used in the examples was polyethylene glycol 1500;
the molecular weight of the polyhydroxyethyl methacrylate is 650.7, and the polyhydroxyethyl methacrylate is sold by Shandong Yinghong chemical company Limited;
such a scleroglucan is commercially available from Hebeixin Synbiotic chemical Co., Ltd.
Example 1
A supramolecular gel plugging agent for fractured strata comprises the following raw materials in percentage by mass: the content of the copolymerization monomer is 30 percent; the surfactant content was 3.5%; the initiator content is 0.5%; the content of the cosolvent is 0.8 percent; the content of the accelerant is 0.25 percent; the content of the saline solution is 1.5 percent, the balance is water, and the total content of all the components is one hundred percent.
The copolymerization monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule, wherein the mass ratio of the hydrophilic monomer to the hydrophobic monomer to the functional group molecule is 7:2: 1; the hydrophilic monomer is a combination of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid and N-vinyl pyrrolidone, and the mass ratio of the acrylamide to the 2-acrylamido-2-methylpropanesulfonic acid to the N-vinyl pyrrolidone is 5:3: 2; the hydrophobic monomer is a combination of octadecyl methacrylate and lauryl methacrylate, and the mass ratio of the octadecyl methacrylate to the lauryl methacrylate is 7: 3; the functionalized group molecule is a combination of scleroglucan, chitosan and beta-cyclodextrin, and the mass ratio of the scleroglucan to the chitosan to the beta-cyclodextrin is 6:3: 1.
The surfactant is a combination of sodium dodecyl benzene sulfonate and sodium dodecyl sulfate, and the mass ratio of the sodium dodecyl benzene sulfonate to the sodium dodecyl sulfate is 2: 3.
The initiator is a combination of azobisisobutyrimidazoline hydrochloride and potassium persulfate, and the mass ratio of the azobisisobutyrimidazoline hydrochloride to the potassium persulfate is 2: 3.
The cosolvent is a combination of anhydrous sodium sulfate and ammonium chloride, and the mass ratio is 1: 1.
The accelerator is a combination of triethylene diamine and N, N-dimethyl-p-toluidine, and the mass ratio of the triethylene diamine to the N, N-dimethyl-p-toluidine is 3: 2.
The saline solution is sodium chloride solution with the concentration of 2.5 mol/L.
The preparation method of the supramolecular gel plugging agent for the fractured stratum comprises the following steps:
(1) adding hydrophilic monomers in copolymerization reaction monomers into water, and stirring at the stirring speed of 500 revolutions per minute at the temperature of 25 ℃ for 25 minutes to obtain a mixed solution A;
(2) adding a hydrophobic monomer in a copolymerization monomer into the mixed solution A, and stirring at the stirring speed of 500 revolutions per minute for 28 minutes at the temperature of 25 ℃ to obtain mixed solution B;
(3) adding the functionalized group molecules and the surfactant into the mixed solution B, and stirring for 45 minutes under the conditions that the stirring temperature is 40 ℃ and the stirring speed is 550 revolutions per minute to prepare mixed solution C;
(4) adding an initiator and a cosolvent into the mixed solution C, stirring for 30 minutes under the conditions that the stirring temperature is 45 ℃ and the stirring speed is 550 revolutions per minute, and stirring until the initiator and the cosolvent are completely dissolved to obtain a mixed solution D;
(5) adding an accelerator and a saline solution into the mixed solution D, and stirring at the stirring speed of 500 revolutions per minute for 30 minutes at the temperature of 50 ℃ to obtain a mixed solution E;
(6) placing the mixed solution E in a three-neck flask, introducing nitrogen, decompressing and vacuumizing, standing for 6 hours at the temperature of 60 ℃ until free radicals are fully polymerized to obtain supermolecule gel; the supramolecular gel was vacuum dried at 70 ℃ for 24 hours and then crushed to obtain the supramolecular gel lost circulation additive for fractured formations, which was designated as sample S1.
Example 2
A supramolecular gel plugging agent for fractured strata comprises the following raw materials in percentage by mass: the content of the copolymerization monomer is 28 percent; the surfactant content was 4.3%; the initiator content is 0.5%; the content of the cosolvent is 0.7 percent; the content of the accelerant is 0.20 percent; the content of the saline solution is 2.0 percent, the balance is water, and the total content of all the components is one hundred percent.
The copolymerization monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule, wherein the mass ratio of the hydrophilic monomer to the hydrophobic monomer to the functional group molecule is 7:2: 1; the hydrophilic monomer is a combination of acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid and hexadecyl dimethyl allyl ammonium chloride, and the mass ratio of the acrylic acid to the 2-acrylamido-2-methylpropanesulfonic acid to the hexadecyl dimethyl allyl ammonium chloride is 5:3: 2; the hydrophobic monomer is a combination of octadecyl methacrylate and hexadecyl methacrylate, and the mass ratio of the octadecyl methacrylate to the hexadecyl methacrylate is 7: 3; the functionalized group molecule is a combination of scleroglucan, chitosan and cucurbituril, and the mass ratio of the scleroglucan to the chitosan to the cucurbituril is 6:3: 1.
The surfactant is a combination of betaine and sodium dodecyl sulfate, and the mass ratio of the betaine to the sodium dodecyl sulfate is 3: 2.
The initiator is selected from the combination of ammonium persulfate and potassium persulfate, and the mass ratio of the ammonium persulfate to the potassium persulfate is 3: 2.
The cosolvent is a combination of anhydrous sodium sulfate and ammonium chloride, and the mass ratio of the anhydrous sodium sulfate to the ammonium chloride is 2: 1.
The accelerator is a combination of triethylene diamine and N, N-dimethyl-p-toluidine, and the mass ratio of the triethylene diamine to the N, N-dimethyl-p-toluidine is 1: 1.
The saline solution is sodium chloride solution with the concentration of 2.5 mol/L.
The method for preparing the supramolecular gel plugging agent for fractured formations is described in example 1, and the prepared supramolecular gel plugging agent is designated as sample S2.
Example 3
A supramolecular gel plugging agent for fractured strata comprises the following raw materials in percentage by mass: the content of the copolymerization monomer is 26 percent; the surfactant content is 5%; the initiator content is 0.5%; the content of the cosolvent is 0.8 percent; the content of the accelerant is 0.30 percent; the content of the saline solution is 2.0 percent, the balance is water, and the total content of all the components is one hundred percent.
The copolymerization monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule, wherein the mass ratio of the hydrophilic monomer to the hydrophobic monomer to the functional group molecule is 7:2: 1; the hydrophilic monomer is a combination of polyethylene glycol, 2-acrylamido-2-methylpropanesulfonic acid and 2-vinylpyridine, and the mass ratio of the polyethylene glycol to the 2-acrylamido-2-methylpropanesulfonic acid to the 2-vinylpyridine is 5:3: 2; the hydrophobic monomer is a combination of octadecyl methacrylate and butyl methacrylate, and the mass ratio of the octadecyl methacrylate to the butyl methacrylate is 3: 2; the functionalized group molecule is a combination of scleroglucan, chitosan and sodium alginate, and the mass ratio of the scleroglucan to the chitosan to the sodium alginate is 3:1: 1.
The surfactant is a combination of sodium dodecyl sulfate and sorbitan fatty acid, and the mass ratio of the sodium dodecyl sulfate to the sorbitan fatty acid is 4: 1.
The initiator is selected from the combination of ammonium persulfate and potassium persulfate, and the mass ratio of the ammonium persulfate to the potassium persulfate is 2: 3.
The cosolvent is a combination of anhydrous calcium sulfate and urea, and the mass ratio of the anhydrous calcium sulfate to the urea is 2: 1.
The accelerator is a combination of triethylene diamine and tetramethyl thiourea, and the mass ratio is 1: 1.
The saline solution is sodium chloride solution with the concentration of 2.5 mol/L.
The method for preparing the supramolecular gel plugging agent for fractured formations is described in example 1, and the prepared supramolecular gel plugging agent is designated as sample S3.
Example 4
A supramolecular gel plugging agent for fractured strata comprises the following raw materials in percentage by mass: the content of the copolymerization monomer is 26 percent; the surfactant content was 4.5%; the initiator content is 0.6%; the content of the cosolvent is 0.9 percent; the content of the accelerant is 0.40 percent; the content of the saline solution is 2.0 percent, the balance is water, and the total content of all the components is one hundred percent.
The copolymerization monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule, wherein the mass ratio of the hydrophilic monomer to the hydrophobic monomer to the functional group molecule is 7:2: 1; the hydrophilic monomer is a combination of methacrylic acid, sodium acrylate and N-isopropyl acrylamide, and the mass ratio of the methacrylic acid to the sodium acrylate to the N-isopropyl acrylamide is 4:3: 3; the hydrophobic monomer is a combination of hexadecyl methacrylate and polyhydroxyethyl methacrylate, and the mass ratio of the hexadecyl methacrylate to the polyhydroxyethyl methacrylate is 4: 1; the functionalized group molecule is the combination of sodium alginate, beta-cyclodextrin and calix [6] arene, and the mass ratio of the sodium alginate to the beta-cyclodextrin to the calix [6] arene is 1:4: 1.
The surfactant is a combination of sodium dodecyl sulfate and stearic acid, and the mass ratio of the sodium dodecyl sulfate to the stearic acid is 3: 2.
The initiator is a combination of potassium persulfate and dimethyl azodiisobutyrate, and the mass ratio of the potassium persulfate to the dimethyl azodiisobutyrate is 4: 1.
The cosolvent is a combination of anhydrous calcium sulfate and ammonium chloride, and the mass ratio of the anhydrous calcium sulfate to the ammonium chloride is 2: 1.
The accelerator is a combination of triethylamine and 8-hydroxyquinoline with a mass ratio of 1: 1.
The saline solution is sodium chloride solution with the concentration of 2.5 mol/L.
The method for preparing the supramolecular gel plugging agent for fractured formations is described in example 1, and the prepared supramolecular gel plugging agent is designated as sample S4.
Example 5
A supramolecular gel plugging agent for fractured strata comprises the following raw materials in percentage by mass:
the content of the copolymerization monomer is 24 percent; the surfactant content is 5%; the initiator content is 0.5%; the content of the cosolvent is 0.8 percent; the content of the accelerant is 0.50 percent; the content of the saline solution is 2.0 percent, the balance is water, and the total content of all the components is one hundred percent.
The copolymerization monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule, wherein the mass ratio of the hydrophilic monomer to the hydrophobic monomer to the functional group molecule is 7:2: 1; the hydrophilic monomer is a combination of acrylamide, polyethylene glycol and methacrylic acid, and the mass ratio of the acrylamide to the polyethylene glycol to the methacrylic acid is 5:3: 2; the hydrophobic monomer is a combination of dimethylaminoethyl methacrylate and 4-methylstyrene, and the mass ratio of the dimethylaminoethyl methacrylate to the 4-methylstyrene is 3: 2; the functionalized group molecule is the combination of scleroglucan, sodium alginate and calix [6] arene, and the mass ratio of the scleroglucan, the sodium alginate and the calix [6] arene is 1:4: 1.
The surfactant is a combination of sodium dodecyl sulfate and stearic acid, and the mass ratio of the sodium dodecyl sulfate to the stearic acid is 3: 2.
The initiator is a combination of cumene hydroperoxide and azodiisobutyl ester, and the mass ratio of the cumene hydroperoxide to the azodiisobutyl ester is 1: 4.
The cosolvent is a combination of anhydrous sodium sulfate and urea, and the mass ratio of the anhydrous sodium sulfate to the urea is 3: 2.
The accelerator is a combination of 1, 2-bis (dimethylamino) ethane and ferrocene, and the mass ratio of the 1, 2-bis (dimethylamino) ethane to the ferrocene is 4: 1.
The saline solution is sodium chloride solution with the concentration of 2.5 mol/L.
The method for preparing the supramolecular gel plugging agent for fractured formations is described in example 1, and the prepared supramolecular gel plugging agent is designated as sample S5.
Example 6
A supramolecular gel plugging agent for fractured strata comprises the following raw materials in percentage by mass: the content of the copolymerization monomer is 28 percent; the surfactant content was 4.3%; the initiator content is 0.5%; the content of the cosolvent is 0.7 percent; the content of the accelerant is 0.20 percent; the content of the saline solution is 2.0 percent, the balance is water, and the total content of all the components is one hundred percent.
The copolymerization monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule, wherein the mass ratio of the hydrophilic monomer to the hydrophobic monomer to the functional group molecule is 7:2: 1; the hydrophilic monomer is a combination of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid and hexadecyl dimethyl allyl ammonium chloride, and the mass ratio of the acrylamide to the 2-acrylamido-2-methylpropanesulfonic acid to the hexadecyl dimethyl allyl ammonium chloride is 5:3: 2; the hydrophobic monomer is a combination of octadecyl methacrylate and hexadecyl methacrylate, and the mass ratio of the octadecyl methacrylate to the hexadecyl methacrylate is 7: 3; the functionalized group molecule is a combination of chitosan, sodium alginate and beta-cyclodextrin, and the mass ratio of the chitosan to the sodium alginate to the beta-cyclodextrin is 4:3: 3.
The surfactant is a combination of betaine and sodium dodecyl sulfate, and the mass ratio of the betaine to the sodium dodecyl sulfate is 4: 1.
The initiator is selected from the combination of ammonium persulfate and potassium persulfate, and the mass ratio of the ammonium persulfate to the potassium persulfate is 3: 2.
The cosolvent is a combination of anhydrous sodium sulfate and ammonium chloride, and the mass ratio of the anhydrous sodium sulfate to the ammonium chloride is 3: 2.
The accelerator is a combination of triethylene diamine and N, N-dimethyl-p-toluidine, and the mass ratio of the triethylene diamine to the N, N-dimethyl-p-toluidine is 2: 1.
The saline solution is sodium chloride solution with the concentration of 2.5 mol/L.
The method for preparing the supramolecular gel plugging agent for fractured formations is described in example 1, and the prepared supramolecular gel plugging agent is designated as sample S6.
Example 7
A supramolecular gel plugging agent for fractured strata comprises the following raw materials in percentage by mass: the content of the copolymerization monomer is 28 percent; the surfactant content was 4.3%; the initiator content is 0.5%; the content of the cosolvent is 0.7 percent; the content of the accelerant is 0.20 percent; the content of the saline solution is 2.0 percent, the balance is water, and the total content of all the components is one hundred percent.
The copolymerization monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule, wherein the mass ratio of the hydrophilic monomer to the hydrophobic monomer to the functional group molecule is 7:2: 1; the hydrophilic monomer is a combination of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid and hexadecyl dimethyl allyl ammonium chloride, and the mass ratio of the acrylamide to the 2-acrylamido-2-methylpropanesulfonic acid to the hexadecyl dimethyl allyl ammonium chloride is 5:3: 2; the hydrophobic monomer is a combination of octadecyl methacrylate and hexadecyl methacrylate, and the mass ratio of the octadecyl methacrylate to the hexadecyl methacrylate is 7: 3; the functionalized group molecule is a combination of beta-cyclodextrin, calix [6] arene and cucurbituril, and the mass ratio of the beta-cyclodextrin, the calix [6] arene and the cucurbituril is 5:3: 2.
The surfactant is a combination of betaine and sodium dodecyl sulfate, and the mass ratio of the betaine to the sodium dodecyl sulfate is 4: 3.
The initiator is selected from the combination of ammonium persulfate and potassium persulfate, and the mass ratio of the ammonium persulfate to the potassium persulfate is 3: 2.
The cosolvent is a combination of anhydrous sodium sulfate and ammonium chloride, and the mass ratio of the anhydrous sodium sulfate to the ammonium chloride is 3: 2.
The accelerator is a combination of triethylene diamine and N, N-dimethyl-p-toluidine, and the mass ratio of the triethylene diamine to the N, N-dimethyl-p-toluidine is 2: 1.
The saline solution is sodium chloride solution with the concentration of 2.5 mol/L.
The method for preparing the supramolecular gel plugging agent for fractured formations is described in example 1, and the prepared supramolecular gel plugging agent is designated as sample S7.
Example 8
A supramolecular gel plugging agent for fractured strata comprises the following raw materials in percentage by mass: the content of the copolymerization monomer is 28 percent; the surfactant content was 4.3%; the initiator content is 0.5%; the content of the cosolvent is 0.7 percent; the content of the accelerant is 0.20 percent; the content of the saline solution is 2.0 percent, the balance is water, and the total content of all the components is one hundred percent.
The copolymerization monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule, wherein the mass ratio of the hydrophilic monomer to the hydrophobic monomer to the functional group molecule is 7:2: 1; the hydrophilic monomer is a combination of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid and hexadecyl dimethyl allyl ammonium chloride, and the mass ratio of the acrylamide to the 2-acrylamido-2-methylpropanesulfonic acid to the hexadecyl dimethyl allyl ammonium chloride is 5:3: 2; the hydrophobic monomer is a combination of octadecyl methacrylate and hexadecyl methacrylate, and the mass ratio of the octadecyl methacrylate to the hexadecyl methacrylate is 7: 3; the functionalized group molecule is a combination of chitosan, calix [6] arene and cucurbituril, and the mass ratio of beta-cyclodextrin, the calix [6] arene and the cucurbituril is 6:3: 1.
The surfactant is a combination of betaine and sodium dodecyl sulfate, and the mass ratio of the betaine to the sodium dodecyl sulfate is 4: 3.
The initiator is selected from the combination of ammonium persulfate and potassium persulfate, and the mass ratio of the ammonium persulfate to the potassium persulfate is 3: 2.
The cosolvent is a combination of anhydrous sodium sulfate and ammonium chloride, and the mass ratio of the anhydrous sodium sulfate to the ammonium chloride is 3: 2.
The accelerator is a combination of triethylene diamine and N, N-dimethyl-p-toluidine, and the mass ratio of the triethylene diamine to the N, N-dimethyl-p-toluidine is 2: 1.
The saline solution is sodium chloride solution with the concentration of 2.5 mol/L.
The method for preparing the supramolecular gel plugging agent for fractured formations is described in example 1, and the prepared supramolecular gel plugging agent is designated as sample S8.
Example 9
A supramolecular gel plugging agent for fractured strata comprises the following raw materials in percentage by mass: the content of the copolymerization monomer is 28 percent; the surfactant content was 4.3%; the initiator content is 0.5%; the content of the cosolvent is 0.7 percent; the content of the accelerant is 0.20 percent; the content of the saline solution is 2.0 percent, the balance is water, and the total content of all the components is one hundred percent.
The copolymerization monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule, wherein the mass ratio of the hydrophilic monomer to the hydrophobic monomer to the functional group molecule is 7:2: 1; the hydrophilic monomer is a combination of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid and hexadecyl dimethyl allyl ammonium chloride, and the mass ratio of the acrylamide to the 2-acrylamido-2-methylpropanesulfonic acid to the hexadecyl dimethyl allyl ammonium chloride is 5:3: 2; the hydrophobic monomer is a combination of octadecyl methacrylate and hexadecyl methacrylate, and the mass ratio of the octadecyl methacrylate to the hexadecyl methacrylate is 7: 3; the functionalized group molecule is the combination of sodium alginate, calix [6] arene and cucurbituril, and the mass ratio of the sodium alginate to the calix [6] arene to the cucurbituril is 2:3: 5.
The surfactant is a combination of betaine and sodium dodecyl sulfate, and the mass ratio of the betaine to the sodium dodecyl sulfate is 4: 3.
The initiator is selected from the combination of ammonium persulfate and potassium persulfate, and the mass ratio of the ammonium persulfate to the potassium persulfate is 3: 2.
The cosolvent is a combination of anhydrous sodium sulfate and ammonium chloride, and the mass ratio of the anhydrous sodium sulfate to the ammonium chloride is 3: 2.
The accelerator is a combination of triethylene diamine and N, N-dimethyl-p-toluidine, and the mass ratio of the triethylene diamine to the N, N-dimethyl-p-toluidine is 2: 1.
The saline solution is sodium chloride solution with the concentration of 2.5 mol/L.
The method for preparing the supramolecular gel plugging agent for fractured formations is described in example 1, and the prepared supramolecular gel plugging agent is designated as sample S9.
Example 10
A supramolecular gel plugging agent for fractured strata comprises the following raw materials in percentage by mass: the content of the copolymerization monomer is 28 percent; the surfactant content was 4.3%; the initiator content is 0.5%; the content of the cosolvent is 0.7 percent; the content of the accelerant is 0.20 percent; the content of the saline solution is 2.0 percent, the balance is water, and the total content of all the components is one hundred percent.
The copolymerization reaction monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule, wherein the mass ratio of the hydrophilic monomer to the hydrophobic monomer to the functional group molecule is 7:2: 1; the hydrophilic monomer is a combination of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid and hexadecyl dimethyl allyl ammonium chloride, and the mass ratio of the acrylamide to the 2-acrylamido-2-methylpropanesulfonic acid to the hexadecyl dimethyl allyl ammonium chloride is 5:3: 2; the hydrophobic monomer is a combination of octadecyl methacrylate and hexadecyl methacrylate, and the mass ratio of the octadecyl methacrylate to the hexadecyl methacrylate is 7: 3; the functionalized group molecule is a combination of chitosan, beta-cyclodextrin and calix [6] arene, and the mass ratio of the chitosan, the beta-cyclodextrin and the calix [6] arene is 7:2: 1.
The surfactant is a combination of betaine and sodium dodecyl sulfate, and the mass ratio of the betaine to the sodium dodecyl sulfate is 4: 3.
The initiator is selected from the combination of ammonium persulfate and potassium persulfate, and the mass ratio of the ammonium persulfate to the potassium persulfate is 3: 2.
The cosolvent is a combination of anhydrous sodium sulfate and ammonium chloride, and the mass ratio of the anhydrous sodium sulfate to the ammonium chloride is 3: 2.
The accelerator is a combination of triethylene diamine and N, N-dimethyl-p-toluidine, and the mass ratio of the triethylene diamine to the N, N-dimethyl-p-toluidine is 2: 1.
The saline solution is sodium chloride solution with the concentration of 2.5 mol/L.
The method for preparing the supramolecular gel plugging agent for fractured formations is described in example 1, and the prepared supramolecular gel plugging agent is designated as sample S10.
Comparative example 1
A supramolecular gel plugging agent for fractured formations, which comprises the following raw materials in the following composition as described in example 1, except that: no functionalizing group molecules were added.
The concrete raw materials comprise: the content of the copolymerization monomer is 30 percent (the mass ratio of the hydrophilic monomer to the hydrophobic monomer is 7: 2); the surfactant content was 3.5%; the initiator content is 0.5%; the content of the cosolvent is 0.8 percent; the content of the accelerant is 0.25 percent; the content of the saline solution is 1.5 percent, the balance is water, and the sum of the contents of all the components is one hundred percent; the kinds of the above components are as described in example 1.
The preparation of the supramolecular gel plugging agent is described in example 1, and the obtained product is designated as D1.
Comparative example 2
A supramolecular gel plugging agent for fractured formations, which comprises the following raw materials in the following composition as described in example 1, except that: no surfactant was added.
The concrete raw materials comprise: the content of the copolymerization monomer is 30 percent; the initiator content is 0.5%; the content of the cosolvent is 0.8 percent; the content of the accelerant is 0.25 percent; the content of the saline solution is 1.5 percent, the balance is water, and the sum of the contents of all the components is one hundred percent; the kinds of the above components are as described in example 1.
The preparation of the supramolecular gel plugging agent is described in example 1, and the obtained product is designated as D2.
Comparative example 3
A supramolecular gel plugging agent for fractured formations, which comprises the following raw materials in the following composition as described in example 1, except that: no initiator was added.
The concrete raw materials comprise: the content of the copolymerization monomer is 30 percent; the surfactant content was 3.5%; the content of the cosolvent is 0.8 percent; the content of the accelerant is 0.25 percent; the content of the saline solution is 1.5 percent, the balance is water, and the sum of the contents of all the components is one hundred percent; the kinds of the above components are as described in example 1.
The preparation of the supramolecular gel plugging agent is described in example 1, and the obtained product is designated as D3.
Comparative example 4
A supramolecular gel plugging agent for fractured formations, which comprises the following raw materials in the following composition as described in example 1, except that: no co-solvent was added.
The concrete raw materials comprise: the content of the copolymerization monomer is 30 percent; the surfactant content was 3.5%; the initiator content is 0.5%; the content of the accelerant is 0.25 percent; the content of the saline solution is 1.5 percent, the balance is water, and the sum of the contents of all the components is one hundred percent; the kinds of the above components are as described in example 1.
The preparation of the supramolecular gel plugging agent is described in example 1, and the obtained product is designated as D4.
Comparative example 5
A supramolecular gel plugging agent for fractured formations, which comprises the following raw materials in the following composition as described in example 1, except that: no accelerator was added.
The concrete raw materials comprise: the content of the copolymerization monomer is 30 percent; the surfactant content was 3.5%; the initiator content is 0.5%; the content of the cosolvent is 0.8 percent; the content of the saline solution is 1.5 percent, the balance is water, and the sum of the contents of all the components is one hundred percent; the kinds of the above components are as described in example 1.
The preparation of the supramolecular gel plugging agent is described in example 1, and the obtained product is designated as D5.
Comparative example 6
A supramolecular gel plugging agent for fractured formations, which comprises the following raw materials in the following composition as described in example 1, except that: the content of comonomer was 15%.
The concrete raw materials comprise: the content of the copolymerization monomer is 15 percent; the initiator content is 0.5%; the content of the cosolvent is 0.8 percent; the content of the accelerant is 0.25 percent; the content of the saline solution is 1.5 percent, the balance is water, and the sum of the contents of all the components is one hundred percent; the kinds of the above components are as described in example 1.
The preparation of the supramolecular gel plugging agent is described in example 1, and the obtained product is designated as D6.
Comparative example 7
A supramolecular gel plugging agent for fractured formations, which comprises the following raw materials in the following composition as described in example 1, except that: the content of the copolymerization monomer is 10 percent; the kinds of the above components are as described in example 1.
The concrete raw materials comprise: the content of the copolymerization monomer is 10 percent; the initiator content is 0.5%; the content of the cosolvent is 0.8 percent; the content of the accelerant is 0.25 percent; the content of the saline solution is 1.5 percent, the balance is water, and the total content of all the components is one hundred percent.
The preparation of the supramolecular gel plugging agent is described in example 1, and the obtained product is designated as D7.
Comparative example 8
A supramolecular gel plugging agent for fractured formations, which comprises the following raw materials in the following composition as described in example 1, except that: the mass ratio of the hydrophilic monomer to the hydrophobic monomer to the functionalized group molecule is 5:1: 1.
The preparation of the supramolecular gel plugging agent is described in example 1, and the obtained product is designated as D8.
Comparative example 9
A supramolecular gel plugging agent for fractured formations, which comprises the following raw materials in the following composition as described in example 1, except that: the mass ratio of the hydrophilic monomer, the hydrophobic monomer and the functionalized group molecule is 9:1: 1.
The preparation of the supramolecular gel plugging agent is described in example 1, and the obtained product is designated as D9.
Test examples
The supramolecular gel plugging agent prepared in the embodiment and the comparative example is subjected to rheological property, compression resistance and high-temperature and high-pressure plugging property tests.
Test 1 test of rheological Properties of supramolecular gel plugging agent
The rheological property of the supramolecular gel is tested by using a model HAAKE MARS 60 rheometer, the model of a conical rotor is C351 DEG/Ti (the cone angle of the rotor is 1 DEG, the diameter of the rotor is 35mm), and the clearance between the rotor and a sample table is 0.053mm during the test. During the experiment, the supermolecule gel plugging agent is cut into a circular sample slice with the diameter of 30mm and the thickness of 10mm by using a vernier caliper, wherein the testing conditions of the storage modulus (G ') and the loss modulus (G') are 1.0% of constant strain, the oscillation scanning frequency is set to be 1Hz, and the angular frequency range is set to be 0.01-100rad s-1. The temperature of the test sample is balanced for at least 30 minutes, the temperature error is controlled to be +/-0.1 ℃, and a solvent catcher is adopted to reduce the evaporation of water in the experimental process.
The evaluation criteria of the rheological property of the supramolecular gel plugging agent are shown in table 1. Wherein, the ratio of the storage modulus to the loss modulus is defined as beta, which represents the elastic strength; defining the ratio of loss modulus to storage modulus as delta, and expressing the viscous strength; the rheological results of the supramolecular gel plugging agent prepared in each of the above examples and comparative examples are shown in table 2.
Test 2. compressive resistance test of supramolecular gel plugging agent
Preparing the supramolecular gel plugging agent into a cylinder with the bottom surface diameter of 20mm and the height of 10mm, performing gel compression mechanical property test by adopting an electronic universal tester, setting the compression speed to be 3mm/min, and recording the stress-strain numerical value of the supramolecular gel plugging agent sample under compression. The compression rate ω is the ratio of the height of the gel compressed to the original height of the gel before compression; the compressive stress τ is a value obtained by dividing the compressive load applied to the sample by the original cross-sectional area of the sample during the compression test and can be directly measured.
The evaluation criteria of the compressive resistance of the supramolecular gel plugging agent are shown in table 3; the compression resistance results of the supramolecular gel plugging agent prepared in each of the above examples and comparative examples are shown in table 4.
Test 3. test of high-temperature high-pressure leak-stopping performance of supramolecular gel leak-stopping agent
The pressure-bearing plugging performance of the supermolecule gel plugging agent on the cracks is researched by using a high-temperature high-pressure crack physical simulation device. The simulated crack core is made of steel and is columnar in appearance, the crack penetrates through the longitudinal section of the steel column, the length of the crack is 30cm, the height of the crack is 3cm, and the width of the crack is 3mm, 5mm, 7 mm and 9mm respectively.
The high-temperature high-pressure leak stoppage test comprises the following steps: (a) adjusting the temperature of the heating box to 160 ℃ of the simulated formation temperature as required; (b) putting a steel crack core with required seam width into a core holder, and applying confining pressure to 16 MPa; (c) injecting a simulation drilling fluid into the fracture core at an injection rate of 5.0mL/min until the fracture core is saturated; (d) injecting the supermolecule gel solution (namely the mixed solution E) into the fracture core at an injection rate of 5.0mL/min until the gel solution is completely produced at the fracture outlet; (e) sealing the crack core model, and standing for 2 hours until the reaction of the supermolecule gel solution is finished; (f) and (3) reversely injecting the simulated drilling fluid into the fracture core at an injection rate of 5.0mL/min, and recording the injection pressure change in real time by using data software, wherein the highest pressure reached when the drilling fluid leaks from the outlet end of the fracture model is the pressure-bearing plugging strength of the supramolecular gel plugging agent to the fracture.
The results of the high-temperature and high-pressure plugging performance of the supramolecular gel plugging agent prepared in the above examples and comparative examples are shown in table 5.
Test 4. test of salt resistance and temperature resistance of supramolecular gel plugging agent
The method for testing the salt resistance of the supramolecular gel plugging agent comprises the following steps: using 200000 mg.L-1Sodium chloride solution of concentration and 10000 mg.L-1After compounding, replacing water to simulate the mineralization degree of the formation water to prepare the supermolecule gel plugging agent, putting the supermolecule gel plugging agent into a high-temperature oven at the temperature of 160 ℃, observing and recording the gelling time, and testing the storage modulus of the supermolecule gel plugging agent by using a Haake rheometer after gelling. The supramolecular gels prepared by the methods of examples 1-2 above were subjected to salt resistance testing according to the salt resistance testing method, and the results are shown in table 6.
The test method for the temperature resistance of the supramolecular gel plugging agent comprises the following steps: the supermolecule gel sample prepared in the example 1 is filled into a steel crack rock core with the crack width of 3mm, and is respectively put into a constant-temperature aging furnace with the temperature of 150 ℃, 160 ℃, 170 ℃ and 180 ℃ for hot rolling for 72 hours, and then a high-temperature high-pressure leak stoppage performance test is carried out, and the temperature resistance performance of the supermolecule gel sample is observed. The results of the temperature resistance of example 1 are shown in Table 7.
TABLE 1 evaluation criteria for rheological Properties of supramolecular gels
Table 2 rheological results of supramolecular gel plugging agents prepared in examples and comparative examples
TABLE 3 evaluation criteria for compressive resistance of supramolecular gel plugging agent
| Compressibility ω/%) | Compressive stress tau/N | Compressive strength |
| ω≥90 | τ≥400 | High strength |
| 80≤ω＜90 | 300≤τ＜400 | Medium and high grade |
| ω＜80 | τ＜300 | Weak (weak) |
Table 4 results of compression resistance of supramolecular gelling plugging agents prepared in examples and comparative examples
Table 5 results of high temperature and high pressure plugging performance of supramolecular gels prepared in examples and comparative examples
TABLE 6 salt resistance test results of supramolecular gel plugging agent
TABLE 7 test results of temperature resistance of the supramolecular gel plugging agent under different temperature conditions
Different performance evaluation tests are carried out on the supramolecular gel plugging agent prepared in each embodiment and comparative example, and the results show that the addition of functionalized group molecules into the supramolecular gel raw material is beneficial to the construction of a three-dimensional network structure of the supramolecular gel, the addition of the surfactant also promotes the hydrophobic association interaction between the hydrophilic monomer and the hydrophobic monomer, and meanwhile, multiple hydrogen bonds, host and guest molecules and the like are introduced through the design of the supramolecular structure, so that the mutual entanglement strength between the supramolecular gels can be increased, the bearing capacity and the compression resistance of the supramolecular gel plugging agent in strata with different fracture widths can be effectively improved, the bearing capacity is more than 14MPa, the compression ratio is more than 91%, and the compression resistance is strong; the supramolecular gel plugging agent has high temperature resistance and salt resistance. The storage modulus G' of the supermolecule gel plugging agent prepared by the invention is more than 4000Pa, and can meet better use conditions.
Claims (10)
1. The supramolecular gel plugging agent for fractured strata is characterized by comprising the following raw materials in percentage by mass: 18-45% of copolymerization monomer, 0.5-6.0% of surfactant, 0.1-2.0% of initiator, 0.1-2.0% of cosolvent, 0.05-0.5% of accelerator, 0.5-5% of saline solution and the balance of water; the copolymerization reaction monomer is a combination of a hydrophilic monomer, a hydrophobic monomer and a functional group molecule.
2. The supramolecular gel lost circulation agent for fractured formations of claim 1, comprising the following raw materials in percentage by mass: 24-35% of copolymerization reaction monomer, 3-5% of surfactant, 0.4-1% of initiator, 0.5-1% of cosolvent, 0.2-0.5% of accelerator, 1-3% of saline solution and the balance of water.
3. The supramolecular gel plugging agent for fractured formations according to claim 1, wherein the mass ratio of hydrophilic monomer, hydrophobic monomer and functionalized group molecule in the copolymerization reaction monomer is 6-8:1-3:1, preferably 7:2: 1.
4. The supramolecular gel plugging agent for fractured formations of claim 1, wherein the hydrophilic monomer is a combination of two or more of acrylamide, acrylic acid, methacrylic acid, sodium acrylate, polyethylene glycol, N-isopropyl acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, hexadecyl dimethyl allyl ammonium chloride, N-dodecyl acrylamide, N-vinyl pyrrolidone, 2-vinyl pyridine and N-hydroxyethyl acrylamide; preferably, the acrylic acid modified.
5. The supramolecular gel plugging agent for fractured formations of claim 1, wherein the hydrophobic monomer is a combination of two or more of octadecyl methacrylate, methyl methacrylate, butyl methacrylate, hexadecyl methacrylate, polyhydroxyethyl methacrylate, dimethylaminoethyl methacrylate, 2-ethyl methacrylate, beta-hydroxyethyl methacrylate, lauryl methacrylate, vinyl 4-trifluoromethylcarbonate and 4-methylstyrene; more preferably, it is a combination of two or more of octadecyl methacrylate, lauryl methacrylate, hexadecyl methacrylate, butyl methacrylate, dimethylaminoethyl methacrylate, 4-methylstyrene and polyhydroxyethyl methacrylate.
6. The supramolecular gel plugging agent for fractured formations according to claim 1, wherein the functionalized group molecule is one or a combination of more than two of scleroglucan, chitosan, sodium alginate, 18-crown-6, cyclodipeptide, beta-cyclodextrin, calix [6] arene, diethoxy column [5] arene and cucurbituril; preferably two or more than three of scleroglucan, chitosan, sodium alginate, beta-cyclodextrin, calix [6] arene and cucurbituril.
7. The supramolecular gel lost circulation agent for fractured formations of claim 1, wherein the surfactant is one or a combination of more than two of sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, dodecyl phenol polyoxyethylene ether, stearic acid, sorbitan fatty acid, betaine and polysorbate;
the initiator is one or the combination of more than two of diisopropyl peroxydicarbonate, tert-butyl peroxybenzoate, cumene hydroperoxide, potassium persulfate, ammonium persulfate, azobis (isobutyl azoate), dimethyl azobisisobutyrate, azobisisobutyric imidazoline hydrochloride and sodium sulfite.
8. The supramolecular gel plugging agent for fractured formations according to claim 1, wherein the cosolvent is sulfate and/or nitrogen-containing compound, preferably a combination of sulfate and nitrogen-containing compound, wherein the mass ratio of the sulfate to the nitrogen-containing compound is 1-2: 1; the sulfate is anhydrous sodium sulfate or anhydrous calcium sulfate, and the nitrogen-containing compound is urea or ammonium chloride;
the accelerant is one or the combination of more than two of 1, 2-bis (dimethylamino) ethane, triethylene diamine, ferric trichloride, tetramethyl thiourea, vanadium acetylacetonate, acetylacetone, N-dimethyl-p-toluidine, triethylamine, tetrahydroquinoline, 8-hydroxyquinoline and ferrocene; preferably a combination of triethylenediamine and N, N-dimethyl-p-toluidine;
the saline solution is a sodium chloride aqueous solution and/or a potassium chloride aqueous solution, preferably a sodium chloride aqueous solution; the concentration of the aqueous salt solution is 0.5 to 5mol/L, preferably 2 to 3 mol/L.
9. A method for the preparation of the supramolecular gel plugging agent for fractured formations as claimed in any one of claims 1 to 8, comprising the steps of:
(1) adding hydrophilic monomers in copolymerization reaction monomers into water, and uniformly stirring to obtain a mixed solution A;
(2) adding a hydrophobic monomer in the copolymerization reaction monomer into the mixed solution A, and uniformly stirring to obtain a mixed solution B;
(3) adding the functionalized group molecules and the surfactant into the mixed solution B, and uniformly stirring to obtain a mixed solution C;
(4) adding an initiator and a cosolvent into the mixed solution C, and stirring until the initiator and the cosolvent are completely dissolved to obtain a mixed solution D;
(5) adding an accelerant and a saline solution into the mixed solution D, and uniformly stirring to obtain a mixed solution E;
(6) deoxidizing and degassing the mixed solution E, and then standing for reaction to obtain supramolecular gel; drying and crushing the supramolecular gel to obtain the supramolecular gel plugging agent for the fractured stratum;
preferably, in the step (1), the stirring temperature is 20-45 ℃, and more preferably 25-30 ℃; the stirring speed is 300-1000 rpm, and more preferably 400-600 rpm; the stirring time is 10 to 40 minutes, and more preferably 20 to 30 minutes;
in the step (2), the stirring temperature is 20-50 ℃, and the preferable temperature is 23-28 ℃; the stirring speed is 200-800 rpm, and more preferably 450-580 rpm; the stirring time is 5 to 30 minutes, and more preferably 24 to 28 minutes;
in the step (3), the stirring temperature is 30-50 ℃, and the preferable temperature is 35-40 ℃; the stirring speed is 400-1000 rpm, and more preferably 500-700 rpm; the stirring time is 30 to 60 minutes, and more preferably 40 to 50 minutes;
in the step (4), the stirring temperature is 30-70 ℃, and the preferable temperature is 40-50 ℃; the stirring speed is 400-800 r/min, and more preferably 500-600 r/min; the stirring time is 20 to 40 minutes, and more preferably 25 to 35 minutes;
in the step (5), the stirring temperature is 30-70 ℃, and the preferable temperature is 40-60 ℃; the stirring speed is 400-800 r/min, and more preferably 450-550 r/min; the stirring time is 20 to 40 minutes, and more preferably 25 to 30 minutes;
in the step (6), the way of oxygen removal and degassing is to introduce nitrogen and reduce pressure and vacuumize; the temperature of the standing reaction is 50-80 ℃, and the further optimization is 60-65 ℃; the standing reaction time is 5 to 9 hours, and the preferable time is 6 to 7 hours; the drying is carried out for 20 to 30 hours under the conditions that the vacuum degree is 0.08 to 0.1MPa and the temperature is 55 to 80 ℃, and further preferably, the drying is carried out for 24 to 26 hours under the conditions that the vacuum degree is 0.08 to 0.1MPa and the temperature is 70 to 75 ℃.
10. The use of the supramolecular gel plugging agent for fractured formations of any one of claims 1 to 8 in the plugging of fractured formations; the specific application method is as follows: the plugging material is used for plugging drilling fluid, the addition amount of the plugging material is 2-5% of the mass of the drilling fluid, and the plugging material can be injected in a while-drilling injection mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210154918.6A CN114507515B (en) | 2022-02-21 | 2022-02-21 | Supermolecule gel plugging agent for fractured stratum and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210154918.6A CN114507515B (en) | 2022-02-21 | 2022-02-21 | Supermolecule gel plugging agent for fractured stratum and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114507515A true CN114507515A (en) | 2022-05-17 |
| CN114507515B CN114507515B (en) | 2023-06-06 |
Family
ID=81552194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210154918.6A Active CN114507515B (en) | 2022-02-21 | 2022-02-21 | Supermolecule gel plugging agent for fractured stratum and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114507515B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115044357A (en) * | 2022-06-27 | 2022-09-13 | 西安石油大学 | Supermolecule-macromolecule double-network gel system, preparation method and application |
| CN115059440A (en) * | 2022-07-08 | 2022-09-16 | 中海石油(中国)有限公司 | Large-scale multi-dimensional profile adjusting method for oil field water injection well |
| CN116120642A (en) * | 2023-02-13 | 2023-05-16 | 长江大学 | Gel material and preparation method and application thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147267A (en) * | 1994-05-02 | 1997-04-09 | 希巴-盖吉股份公司 | Polymerisable composition and use thereof |
| FR2926548A1 (en) * | 2008-01-21 | 2009-07-24 | Centre Nat Rech Scient | ENCAPSULATION OF VITAMIN C IN WATER-SOLUBLE DENDRIMERS |
| CN106190087A (en) * | 2016-07-07 | 2016-12-07 | 赵立强 | A kind of temporary stall of thermic supermolecular gel is to fracturing fluid |
| CN106381138A (en) * | 2016-09-14 | 2017-02-08 | 中国石油集团渤海钻探工程有限公司 | High-pressure-bearing free-crosslinking supermolecule composite gel leaking plugging agent and preparation method thereof |
| CN112794946A (en) * | 2020-12-31 | 2021-05-14 | 中国石油大学(华东) | Novel hydrophobic association plugging agent and preparation method and application thereof |
| CN113501910A (en) * | 2021-09-09 | 2021-10-15 | 中国石油大学(华东) | Non-covalent-bond synergistic self-healing gel plugging agent and preparation method and application thereof |
| CN113698535A (en) * | 2020-05-21 | 2021-11-26 | 江苏百赛飞生物科技有限公司 | Polymer, composition, coating thereof and product |
| WO2021257505A1 (en) * | 2020-06-15 | 2021-12-23 | Saudi Arabian Oil Company | Method for well treatment, using a reversible aminal gel composition |
| CN113943558A (en) * | 2021-10-15 | 2022-01-18 | 中国石油大学(华东) | Self-healing gel leakage preventer with covalent bond-non-covalent bond combined effect while drilling and preparation method and application thereof |
-
2022
- 2022-02-21 CN CN202210154918.6A patent/CN114507515B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147267A (en) * | 1994-05-02 | 1997-04-09 | 希巴-盖吉股份公司 | Polymerisable composition and use thereof |
| FR2926548A1 (en) * | 2008-01-21 | 2009-07-24 | Centre Nat Rech Scient | ENCAPSULATION OF VITAMIN C IN WATER-SOLUBLE DENDRIMERS |
| CN106190087A (en) * | 2016-07-07 | 2016-12-07 | 赵立强 | A kind of temporary stall of thermic supermolecular gel is to fracturing fluid |
| CN106381138A (en) * | 2016-09-14 | 2017-02-08 | 中国石油集团渤海钻探工程有限公司 | High-pressure-bearing free-crosslinking supermolecule composite gel leaking plugging agent and preparation method thereof |
| CN113698535A (en) * | 2020-05-21 | 2021-11-26 | 江苏百赛飞生物科技有限公司 | Polymer, composition, coating thereof and product |
| WO2021257505A1 (en) * | 2020-06-15 | 2021-12-23 | Saudi Arabian Oil Company | Method for well treatment, using a reversible aminal gel composition |
| CN112794946A (en) * | 2020-12-31 | 2021-05-14 | 中国石油大学(华东) | Novel hydrophobic association plugging agent and preparation method and application thereof |
| CN113501910A (en) * | 2021-09-09 | 2021-10-15 | 中国石油大学(华东) | Non-covalent-bond synergistic self-healing gel plugging agent and preparation method and application thereof |
| CN113943558A (en) * | 2021-10-15 | 2022-01-18 | 中国石油大学(华东) | Self-healing gel leakage preventer with covalent bond-non-covalent bond combined effect while drilling and preparation method and application thereof |
Non-Patent Citations (3)
| Title |
|---|
| BO WANG等: "Effects of a crosslinking agent on a supramolecular gel to control lost circulation" * |
| 王勇等: "超分子化学堵漏技术研究与应用", 《钻井液与完井液》 * |
| 陈德展主编: "《开启化学之门》", 31 October 2013, 山东科学技术出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115044357A (en) * | 2022-06-27 | 2022-09-13 | 西安石油大学 | Supermolecule-macromolecule double-network gel system, preparation method and application |
| CN115059440A (en) * | 2022-07-08 | 2022-09-16 | 中海石油(中国)有限公司 | Large-scale multi-dimensional profile adjusting method for oil field water injection well |
| CN115059440B (en) * | 2022-07-08 | 2024-03-26 | 中海石油(中国)有限公司 | Large-scale multidimensional profile adjusting method for oilfield water injection well |
| CN116120642A (en) * | 2023-02-13 | 2023-05-16 | 长江大学 | Gel material and preparation method and application thereof |
| CN116120642B (en) * | 2023-02-13 | 2024-06-11 | 长江大学 | Gel material and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114507515B (en) | 2023-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114507515B (en) | Supermolecule gel plugging agent for fractured stratum and preparation method and application thereof | |
| CN105368409B (en) | A kind of oil base drilling fluid compound sealing agent and preparation method thereof | |
| CN112877045B (en) | Bulk-swelling efficient slug gel plugging agent and preparation method thereof | |
| CN104232039B (en) | Multi-element synergistic plugging agent and application thereof | |
| CN103013478B (en) | Plugging material used for oil base drilling fluid, and preparation method thereof | |
| CN111218260B (en) | High-temperature-resistant high-oil-absorption resin particle plugging agent suitable for oil-based drilling fluid and preparation method thereof | |
| Xie et al. | Enhanced hydrophobically modified polyacrylamide gel for lost circulation treatment in high temperature drilling | |
| CN111410941B (en) | Temperature-sensitive gel particle plugging agent suitable for fractured leakage stratum and preparation method and application thereof | |
| CN111961453B (en) | High-strength high-water-absorption degradable plugging agent and preparation method thereof | |
| CN113501910B (en) | Multiple non-covalent bond synergistic self-healing gel plugging agent and preparation and application thereof | |
| CN106883357A (en) | A kind of pre-crosslinked gel delays swollen microballoon profile control agent and its production and use | |
| CN112794946A (en) | Novel hydrophobic association plugging agent and preparation method and application thereof | |
| CN114672289A (en) | Delayed expansion leak-proof plugging working solution for crack leakage layer and preparation method thereof | |
| CN116396731A (en) | Hydrophobic association high-performance water-based drilling fluid for shale stratum and preparation method and application thereof | |
| CN114957557A (en) | Temperature-pressure response type underground self-healing plugging agent and preparation method thereof | |
| CN113943558A (en) | Self-healing gel leakage preventer with covalent bond-non-covalent bond combined effect while drilling and preparation method and application thereof | |
| CN115057967A (en) | Microgel chemical wall-solidifying agent for high-temperature-resistant water-based drilling fluid and preparation method and application thereof | |
| CN106349115A (en) | Bis-phenyl hydrophobic monomer and plugging gel based on monomer | |
| CN110305644B (en) | Preparation and application of leakage-reducing flexible colloidal particle well-flushing fluid | |
| CN112280543A (en) | Composite gel plugging material and composite gel plugging slurry | |
| CN113444505B (en) | Self-adaptive plugging isolation liquid system and preparation method thereof | |
| CN116083063B (en) | Delayed expansion plugging system and preparation method thereof | |
| CN114854379B (en) | Environment-friendly cementing type wall fixing agent for water-based drilling fluid and preparation method and application thereof | |
| CN114835856A (en) | Self-healing gel material for leaking stoppage and preparation method and application thereof | |
| CN110628399B (en) | Plugging agent for plugging cracks and plugging method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yang Jingbin Inventor after: Sun Jinsheng Inventor after: Bai Yingrui Inventor after: Lv Kaihe Inventor after: Wang Jintang Inventor after: Zhang Qitao Inventor after: Lei Shaofei Inventor before: Yang Jingbin Inventor before: Wang Wendong Inventor before: Lv Kaihe Inventor before: Sun Jinsheng Inventor before: Zhang Qitao Inventor before: Zhang Qian Inventor before: Lei Shaofei Inventor before: Duan Lian Inventor before: Yan Wubin Inventor before: Wang Jintang Inventor before: Bai Yingrui |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |