CN116694313A - Fatty acid amide propyl dimethylamine hydrate polymerization inhibitor and application thereof - Google Patents
Fatty acid amide propyl dimethylamine hydrate polymerization inhibitor and application thereof Download PDFInfo
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- CN116694313A CN116694313A CN202310620525.4A CN202310620525A CN116694313A CN 116694313 A CN116694313 A CN 116694313A CN 202310620525 A CN202310620525 A CN 202310620525A CN 116694313 A CN116694313 A CN 116694313A
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- Prior art keywords
- fatty acid
- hydrate
- dimethylamine
- acid amide
- amide propyl
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- 238000006116 polymerization reaction Methods 0.000 title claims abstract description 126
- 239000003112 inhibitor Substances 0.000 title claims abstract description 112
- 235000014113 dietary fatty acids Nutrition 0.000 title claims abstract description 78
- 239000000194 fatty acid Substances 0.000 title claims abstract description 78
- 229930195729 fatty acid Natural products 0.000 title claims abstract description 78
- 150000004665 fatty acids Chemical class 0.000 title claims abstract description 78
- LRMNBLSNEKPWTO-UHFFFAOYSA-N n,n-dimethylpropan-1-amine;hydrate Chemical compound O.CCCN(C)C LRMNBLSNEKPWTO-UHFFFAOYSA-N 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- ZUHZZVMEUAUWHY-UHFFFAOYSA-N n,n-dimethylpropan-1-amine Chemical compound CCCN(C)C ZUHZZVMEUAUWHY-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002105 nanoparticle Substances 0.000 claims abstract description 22
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 8
- 150000004677 hydrates Chemical class 0.000 claims abstract description 8
- 229930195734 saturated hydrocarbon Natural products 0.000 claims abstract description 4
- 229930195735 unsaturated hydrocarbon Chemical group 0.000 claims abstract description 4
- 125000001183 hydrocarbyl group Chemical group 0.000 claims abstract 4
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 claims description 96
- 239000007789 gas Substances 0.000 claims description 53
- 239000003921 oil Substances 0.000 claims description 46
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical group CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- BEVGWNKCJKXLQC-UHFFFAOYSA-N n-methylmethanamine;hydrate Chemical compound [OH-].C[NH2+]C BEVGWNKCJKXLQC-UHFFFAOYSA-N 0.000 claims description 4
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 3
- RLTUWTKMDQGLCJ-KVVVOXFISA-N N,N-dimethylpropan-1-amine (Z)-docos-13-enamide Chemical group C(CC)N(C)C.C(CCCCCCCCCCC\C=C/CCCCCCCC)(=O)N RLTUWTKMDQGLCJ-KVVVOXFISA-N 0.000 claims description 3
- 239000005642 Oleic acid Substances 0.000 claims description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 3
- UFXXOBWZXZNMEK-UHFFFAOYSA-N n,n-dimethylpropan-1-amine;dodecanamide Chemical group CCCN(C)C.CCCCCCCCCCCC(N)=O UFXXOBWZXZNMEK-UHFFFAOYSA-N 0.000 claims description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid group Chemical group C(CCCCCCC\C=C/CCCCCCCC)(=O)O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 2
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 claims description 2
- 235000020778 linoleic acid Nutrition 0.000 claims description 2
- OYHQOLUKZRVURQ-HZJYTTRNSA-N linoleic acid group Chemical group C(CCCCCCC\C=C/C\C=C/CCCCC)(=O)O OYHQOLUKZRVURQ-HZJYTTRNSA-N 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 2
- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical group CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 claims description 2
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 claims description 2
- 229960003656 ricinoleic acid Drugs 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 19
- 230000002776 aggregation Effects 0.000 abstract description 14
- 238000004220 aggregation Methods 0.000 abstract description 14
- 239000002002 slurry Substances 0.000 abstract description 10
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 46
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- 229910021641 deionized water Inorganic materials 0.000 description 21
- 239000000243 solution Substances 0.000 description 21
- TWMFGCHRALXDAR-UHFFFAOYSA-N n-[3-(dimethylamino)propyl]dodecanamide Chemical compound CCCCCCCCCCCC(=O)NCCCN(C)C TWMFGCHRALXDAR-UHFFFAOYSA-N 0.000 description 20
- 238000003756 stirring Methods 0.000 description 20
- 238000002474 experimental method Methods 0.000 description 17
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- 238000006243 chemical reaction Methods 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 230000008569 process Effects 0.000 description 12
- 229910004298 SiO 2 Inorganic materials 0.000 description 8
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000007791 liquid phase Substances 0.000 description 6
- 239000012071 phase Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 150000002430 hydrocarbons Chemical group 0.000 description 4
- ORAWFNKFUWGRJG-UHFFFAOYSA-N Docosanamide Chemical compound CCCCCCCCCCCCCCCCCCCCCC(N)=O ORAWFNKFUWGRJG-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 150000004656 dimethylamines Chemical class 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XZWYZXLIPXDOLR-UHFFFAOYSA-N metformin Chemical compound CN(C)C(=N)NC(N)=N XZWYZXLIPXDOLR-UHFFFAOYSA-N 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- UKMSUNONTOPOIO-UHFFFAOYSA-N docosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCC(O)=O UKMSUNONTOPOIO-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- UTBABEVADWVTHM-UHFFFAOYSA-N n,n-dimethylpropan-1-amine;octadecanamide Chemical compound CCCN(C)C.CCCCCCCCCCCCCCCCCC(N)=O UTBABEVADWVTHM-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- 235000019489 Almond oil Nutrition 0.000 description 1
- 235000019737 Animal fat Nutrition 0.000 description 1
- 235000021357 Behenic acid Nutrition 0.000 description 1
- DPUOLQHDNGRHBS-UHFFFAOYSA-N Brassidinsaeure Natural products CCCCCCCCC=CCCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-UHFFFAOYSA-N 0.000 description 1
- SGKJPTUGIJBWFT-UHFFFAOYSA-N C(CC)N(C)C.NC(=O)CCCCCCCCC Chemical compound C(CC)N(C)C.NC(=O)CCCCCCCCC SGKJPTUGIJBWFT-UHFFFAOYSA-N 0.000 description 1
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 description 1
- URXZXNYJPAJJOQ-UHFFFAOYSA-N Erucic acid Natural products CCCCCCC=CCCCCCCCCCCCC(O)=O URXZXNYJPAJJOQ-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- MAMHGRGYWVIEPN-KVVVOXFISA-N N,N-dimethylpropan-1-amine (Z)-octadec-9-enamide Chemical compound CCCN(C)C.CCCCCCCC\C=C/CCCCCCCC(N)=O MAMHGRGYWVIEPN-KVVVOXFISA-N 0.000 description 1
- 241000772415 Neovison vison Species 0.000 description 1
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- 230000002378 acidificating effect Effects 0.000 description 1
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- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
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- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229940049292 n-(3-(dimethylamino)propyl)octadecanamide Drugs 0.000 description 1
- WWVIUVHFPSALDO-UHFFFAOYSA-N n-[3-(dimethylamino)propyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCCN(C)C WWVIUVHFPSALDO-UHFFFAOYSA-N 0.000 description 1
- JHNKQPQZHFKPAK-UHFFFAOYSA-N n-methylmethanamine;octadecanoic acid Chemical compound C[NH2+]C.CCCCCCCCCCCCCCCCCC([O-])=O JHNKQPQZHFKPAK-UHFFFAOYSA-N 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 1
- 239000004006 olive oil Substances 0.000 description 1
- 235000008390 olive oil Nutrition 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 150000004671 saturated fatty acids Chemical class 0.000 description 1
- 239000008159 sesame oil Substances 0.000 description 1
- 235000011803 sesame oil Nutrition 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000020238 sunflower seed Nutrition 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 125000005314 unsaturated fatty acid group Chemical group 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C233/00—Carboxylic acid amides
- C07C233/01—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C233/34—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by amino groups
- C07C233/35—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by amino groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom
- C07C233/36—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by amino groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom having the carbon atom of the carboxamide group bound to a hydrogen atom or to a carbon atom of an acyclic saturated carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C233/00—Carboxylic acid amides
- C07C233/01—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C233/34—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by amino groups
- C07C233/35—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by amino groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom
- C07C233/38—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by amino groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom having the carbon atom of the carboxamide group bound to a carbon atom of an acyclic unsaturated carbon skeleton
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C235/00—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms
- C07C235/02—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton
- C07C235/28—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton being acyclic and unsaturated
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/22—Hydrates inhibition by using well treatment fluids containing inhibitors of hydrate formers
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Lubricants (AREA)
Abstract
The invention provides a fatty acid amide propyl dimethylamine hydrate polymerization inhibitor, which comprises fatty acid amide propyl dimethylamine, wherein the fatty acid amide propyl dimethylamine has a structural general formula shown in a formula I, and R in the formula I is saturated hydrocarbon group with 1-18 carbon atoms or unsaturated hydrocarbon group with 1-22 carbon atoms. The polymerization inhibitor is mainly compounded by fatty acid amide propyl dimethylamine and nano particles. Based on the same inventive concept, the invention also provides an application of the fatty acid amide propyl dimethylamine hydrate polymerization inhibitor in preventing and controlling gas hydrates in deep water oil gas gathering and transportation pipelines. The invention provides a fatty acid amide propyl dimethylamine hydrate polymerization inhibitor, which can lead generated hydrate particles to form hydrate slurry and flow in a pipeline along with fluid without aggregation into a large block or deposition on the pipe wall. The invention is suitable for an oil-gas-water three-phase coexisting system and has the characteristics of wide applicability and low cost.
Description
Technical Field
The invention relates to the field of prevention and control of gas hydrates in deep water oil and gas gathering and transportation pipelines, in particular to a fatty acid amide propyl dimethylamine hydrate polymerization inhibitor and application thereof, and also relates to a compound type hydrate polymerization inhibitor prepared by compounding fatty acid amide propyl dimethylamine with nano particles and application thereof.
Background
The gas hydrate is an icelike crystal formed by small molecular gas (methane, ethane, propane, carbon dioxide, nitrogen and the like) and water under the conditions of high pressure and low temperature, water molecules and gas molecules are respectively called host molecules and guest molecules, the host water molecules form polyhedral cage holes under the action of hydrogen bonds, and the guest molecules are filled in the cage holes to form a stable structure. The oil gas transportation is a key ring in the deep water oil gas development, and because the produced oil gas also contains part of water, the produced oil gas can generate hydration reaction with natural gas in a low-temperature high-pressure environment, so that natural gas hydrate is easy to generate in a deep water mixed transportation pipeline. These hydrates are difficult to carry out long-distance transportation, but gradually aggregate, deposit and even form large-scale hydrate plugs in the process of following the flow of oil, gas and water, thereby affecting the transportation efficiency of oil, threatening the safe production of oil, gas and water, and possibly causing huge economic loss. Aiming at the problems of hydrate generation, aggregation, blockage and the like in a pipeline, the more feasible hydrate control methods include a dehydration method, a depressurization method, a heating method and an inhibitor injection method, wherein the most common method is the inhibitor injection method. The method for injecting the inhibitor mainly ensures the flow safety of the pipeline from two aspects, and firstly inhibits the nucleation and growth process of the hydrate by adding the chemical agent into the pipeline, so that the volume fraction of the hydrate in the pipeline is kept at a lower level; secondly, the generated hydrate is dispersed in the liquid phase in the form of small particles, so that the blockage of a pipeline is avoided. Hydrate inhibitors can be divided into three classes, depending on the mode of action: thermodynamic inhibitors, kinetic inhibitors and inhibitors. The thermodynamic inhibitor has large filling amount, relatively high cost, is easy to pollute the environment and is not suitable for popularization. Kinetic inhibitors and inhibitors are collectively referred to as low dose hydrate inhibition (Low dosage hydrate inhibitors, LDHIs). Small amounts of LDHIs (2 wt.%) can delay or prevent hydrate blockage, kinetic inhibitors will fail at high supercooling temperatures, and are less environmentally friendly.
The polymerization inhibitor is more effective under high supercooling degree, and the polymerization inhibitor from natural products is friendly to the environment, thus having wide application prospect. On the basis of fully considering the advantages and the disadvantages of various hydrate inhibitors, how to develop a high-efficiency, economical and environment-friendly hydrate polymerization inhibitor so as to prevent the blockage of gas hydrate in a deep water oil gas gathering and transportation pipeline is a technical problem to be solved by the invention.
Disclosure of Invention
The invention aims to provide a fatty acid amide propyl dimethylamine hydrate polymerization inhibitor and application thereof, aiming at overcoming the defects of the prior art. In view of the above problems, the present invention proposes a fatty acid amidopropyl dimethylamine hydrate inhibitor which enables the hydrate particles formed to form a hydrate slurry and flow in a pipe with the fluid without agglomerating into a large mass or depositing on the pipe wall. The invention is suitable for an oil-gas-water three-phase coexisting system and has the characteristics of wide applicability and low cost.
The technical scheme of the invention is realized as follows:
a fatty acid amide propyl dimethylamine hydrate polymerization inhibitor comprises fatty acid amide propyl dimethylamine, wherein the fatty acid amide propyl dimethylamine has a structural general formula shown in a formula I, and R in the formula I is saturated hydrocarbon group with 1-18 carbon atoms or unsaturated hydrocarbon group with 1-22 carbon atoms; preferably, R in the formula I is a saturated hydrocarbon group with 1-16 carbon atoms or an unsaturated hydrocarbon group with 1-21 carbon atoms;
the fatty acid amidopropyl dimethylamine has a structural formula shown in the formula I, wherein RC (O) is saturated and unsaturated fatty acid residues extracted from almond oil, avocado oil, babassu seed oil, rapeseed oil, coconut oil, mink oil, oat kernel oil, olive oil, sesame oil, soybean, sunflower seed oil, tall oil, animal fat and germ oil. The fatty acid amide propyl dimethylamine hydrophilic head group is combined with the surface of the hydrate, the hydrophobic tail chains extend into the oil phase, and the aggregation of the hydrate particles is prevented by means of the space repulsive force between the hydrophobic tail chains.
A fatty acid amidopropyl dimethylamine hydrate inhibitor as described above, said fatty acid amidopropyl dimethylamine being selected from any one of the following;
the fatty acid amidopropyl dimethylamine is capridemic acid amidopropyl dimethylamine with a molecular formula of C 13 H 28 N 2 O has a structural formula shown as a formula II,
the fatty acid amide propyl dimethylamine is caproic acid amide propyl dimethylamine with a molecular formula of C 15 H 32 N 2 O has a structural formula shown in a formula III,
the fatty acid amide propyl dimethylamine is lauramide propyl dimethylamine with a molecular formula of C 17 H 36 N 2 O has a structural formula shown in a formula IV,
the fatty acid amidopropyl dimethylamine is oleic acid amidopropyl dimethylamine with a molecular formula of C 23 H 46 N 2 O has a structural formula shown in a formula V,
the fatty acid amidopropyl dimethylamine is linoleic acid amidopropyl dimethylamine with a molecular formula of C 23 H 44 N 2 O has a structure shown in a formula VI,
the fatty acid amide propyl dimethylamine is ricinoleic acid amide propyl dimethylamine with a molecular formula of C 23 H 46 N 2 O 2 The structural formula is shown as a formula VII,
the fatty acid amide propyl dimethylamine is erucic acid amide propyl dimethylamine with a molecular formula of C 27 H 54 N 2 O has a structural formula shown as a formula VIII,
preferably, the fatty acid amidopropyl dimethylamine is selected from any one of caprous acid amidopropyl dimethylamine, capric acid amidopropyl dimethylamine, lauramidopropyl dimethylamine, oleic acid amidopropyl dimethylamine, erucic acid amidopropyl dimethylamine and cocoamidopropyl dimethylamine. More preferably, the fatty acid amidopropyl dimethylamine is selected from any one of lauramidopropyl dimethylamine and cocoamidopropyl dimethylamine.
However, the applicant has unexpectedly found that,not all fatty acid amidopropyl dimethylamines containing the structure of formula I act as inhibitors, for example, amidopropyl dimethylamine stearate, having the formula C 23 H 48 N 2 O has a structural formula shown in formula IX; for example, behenamide propyl dimethylamine with molecular formula of C 27 H 56 N 2 O, structural formula is shown as formula X, the above two fatty acid amidopropyl dimethylamines have no polymerization inhibitor performance, therefore, the inventor performs creative labor in numerous fatty acid amidopropyl dimethylamines, and screens out the compounds with excellent polymerization inhibition performance.
The polymerization inhibitor for the fatty acid amide propyl dimethylamine hydrate comprises, by mass, 0.5-2% of the fatty acid amide propyl dimethylamine (based on the mass of system water). In some embodiments of the present invention, the fatty acid amide propyl dimethylamine hydrate polymerization inhibitor contains only fatty acid amide propyl dimethylamine, the mass fraction of which is 0.5wt% to 2wt% (based on the mass of system water); more preferably, the mass fraction of the fatty acid amidopropyl dimethylamine is 2wt% (based on the mass of system water).
The polymerization inhibitor for the fatty acid amide propyl dimethylamine hydrate also comprises nanoparticles, and the polymerization inhibitor is mainly formed by compounding fatty acid amide propyl dimethylamine and nanoparticles.
The fatty acid amide propyl dimethylamine hydrate polymerization inhibitor is characterized in that the nano particles are prepared from silicon dioxide, ferroferric oxide, titanium dioxide, zinc oxide, ferric oxide or aluminum oxide, and have the effective particle diameter ranging from 0nm to 500nm, preferably hydrophilic nano SiO with the effective particle diameter of 20nm 2 Or hydrophobic nano SiO 2 . The nanoparticles of the present invention relate to hydrophilic nanoparticles and hydrophobic nanoparticles of both hydrophilic and hydrophobic surface characteristics, which nanoparticles may beThe emulsion is stabilized by attaching to the surface of the oil-water-hydrate particles, and a mass transfer barrier of gas phase and water phase among the hydrate particles is formed to prevent the hydrate particles from gathering.
A fatty acid amidopropyl dimethylamine hydrate polymerization inhibitor as described above, wherein the mass fraction of the fatty acid amidopropyl dimethylamine is 0.5wt% -2wt% (based on the mass of the system water), and the mass fraction of the nanoparticle is 0.1wt% -0.5 wt% (based on the mass of the system water). Preferably, in other embodiments of the present invention, the polymerization inhibitor is mainly compounded from fatty acid amidopropyl dimethylamine and nanoparticles, the mass fraction of the fatty acid amidopropyl dimethylamine is 0.5wt% -2wt% (based on the mass of the system water), the mass fraction of the nanoparticles is 0.1wt% -0.4 wt% (based on the mass of the system water), under the scheme, the fatty acid amidopropyl dimethylamine is lauramidopropyl dimethylamine or cocoamidopropyl dimethylamine, and the cocoamidopropyl dimethylamine has a molecular formula of C 17 H 36 N 2 O, the structural formula is shown as the formula XI, and the nano particles are hydrophilic nano SiO of 20nm 2 Particles or 20nm hydrophobic nano SiO 2 Particles; more preferably, the mass fraction of the fatty acid amidopropyl dimethylamine is 0.5wt% (based on the mass of the system water), the mass fraction of the nanoparticles is 0.1wt% -0.25 wt% (based on the mass of the system water), under the scheme, the fatty acid amidopropyl dimethylamine is preferably cocamidopropyldimethylamine, and the nanoparticles are preferably hydrophobic nano SiO with the particle size of 20nm 2 And (3) particles. Most preferably, the mass fraction of the fatty acid amidopropyl dimethylamine is 0.5wt% (based on the mass of the system water), the mass fraction of the nanoparticles is 0.1wt% (based on the mass of the system water), under this scheme, the fatty acid amidopropyl dimethylamine is preferably cocamidopropyldimethylamine, and the nanoparticles are preferably hydrophobic nano SiO with a particle size of 20nm 2 And (3) particles.
Based on the same inventive concept, the invention also provides application of the fatty acid amide propyl dimethylamine hydrate polymerization inhibitor in preventing and controlling gas hydrate in deep water oil gas gathering and transportation pipelines.
The application of the fatty acid amide propyl dimethylamine hydrate polymerization inhibitor in the prevention and treatment of gas hydrate in deep water oil gas gathering and transportation pipelines is applicable to an oil gas water three-phase coexisting system, and the water content application range is 20-80%.
Compared with the existing hydrate inhibitor, the invention has the following advantages:
(1) Low dosage: while the dosage concentration of the traditional thermodynamic inhibitor in the gathering and transportation of deep water oil gas can reach 60wt% (based on the mass of system water), the fatty acid amide propyl dimethylamine hydrate polymerization inhibitor can completely prevent the blockage of the hydrate only at the concentration of 0-2wt% (based on the mass of system water).
(2) High performance: in the face of complex conditions in deep water oil gas gathering and transportation pipelines, the invention can still prevent the aggregation and blockage of hydrates under the condition of 20-80% of water content, and the compounded polymerization inhibitor has stronger performance compared with a single polymerization inhibitor.
(3) The environment friendliness is strong: the fatty acid amide propyl dimethylamine is prepared from natural fatty acid serving as a raw material, some natural fatty acid is widely applied to the washing industry, and the polymerization inhibitor has good biodegradability. In addition, compared with chemical surfactants, the nano-particles of the invention are completely nontoxic, pollution-free and easier to recycle.
Drawings
FIG. 1 is a standard chart of polymerization inhibition grade division in a swing kettle according to the present invention;
FIG. 2 is an image of the pressure, temperature, hydrate volume fraction and slide position of comparative example 1 of the present invention as a function of time in a rocking kettle;
FIG. 3 is an image of the volume fraction of hydrate and slide position of comparative example 2 of the present invention as a function of time in a rocking kettle;
FIG. 4 is an image of the pressure, temperature, volume fraction of hydrate and slide position over time for example 3 of the present invention in a rocking kettle;
FIG. 5 is a schematic representation of a swing kettle incorporating 0.5wt% lauramidopropyl dimethylamine and 0.1wt% hydrophilic nano SiO in example 13 of the present invention 2 Images of the change of the hydrate volume fraction and the slide position of the system with time;
FIG. 6 is an image of the velocity of displacement of the slide of example 13 of the present invention as a function of the integral number of hydrate bodies in a rocking kettle;
FIG. 7 is a graph of the relative current as a function of the integral of hydrate for example 14 of the present invention in a stirred tank.
Detailed Description
The following description of the embodiments of the present invention will clearly and fully describe the technical solutions of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
The experimental methods used in the following examples are conventional methods unless otherwise specified.
Materials, reagents and the like used in the examples described below are commercially available unless otherwise specified. The caprous acid amide propyl dimethylamine, the capric acid amide propyl dimethylamine, the lauramide propyl dimethylamine and the cocoamide propyl dimethylamine are purchased from Shanghai Chustar chemical Co., ltd, the stearic acid amide propyl dimethylamine, the behenamide propyl dimethylamine and the oleic acid amide propyl dimethylamine are purchased from Hangzhou Mo Luote chemical Co., ltd, and are PKO type nonionic surfactants. Hydrophilic spherical nano SiO 2 Hydrophobic spherical nano SiO 2 The particle sizes were 20nm for all of the materials purchased from win-win alloy materials, inc.
The invention adopts the high-pressure hydrate swinging kettle experimental device and the high-pressure hydrate stirring kettle as the test experimental equipment for the performance of the polymerization inhibitor.
The high-pressure hydrate swinging kettle experimental device mainly comprises a kettle body, a swinging system, an air injection system, a data acquisition system and a temperature control system. The swinging system consists of a two-phase stepping motor, a driver, a rotating shaft and a control box, the swinging angle of the swinging kettle is set to be +/-90 degrees, and the highest swinging frequency is 1 time/min; the gas injection system comprises a vacuum pump, a high-pressure gas cylinder, a pressure reducing valve, a six-way valve and a gas pipeline; the data acquisition system comprises all software and hardware related to temperature, pressure and displacement data, and comprises a temperature sensor, a pressure sensor, a displacement sensor, a data acquisition box and real-time monitoring software. The measuring range of the temperature sensor is-50 ℃ to 100 ℃, the measuring precision is +/-0.1K, the measuring range of the pressure sensor is 0MPa to 40MPa, and the precision is +/-0.01 MPa. The working temperature range of the displacement sensor is-40 ℃ to 75 ℃, the linearity is less than +/-0.02% of the full range, and the monitoring software acquires 4 pieces of position information every second to reflect the falling process of the sliding block; the temperature control system adopts Ningbo TianhengTHX-2030H water bath, the temperature range is-20 ℃ to 100 ℃, and the cooling rate is 2 ℃ and H -1 . The generation and aggregation of the hydrate directly affect the motion state of the sliding block, and the polymerization inhibition performance dividing standard is provided by combining the characteristics of the swinging kettle equipment, as shown in figure 1.
Considering that the total length in the kettle is 200mm, the movable range of the sliding block is 10mm-200mm, the movement range of the sliding block is regulated to be 190mm, and the movement range of the sliding block is regulated to be 0mm, so that the sliding block is regarded as a sliding block blockage. If the polymerization inhibitor has strong performance, the hydrate is dispersed in a liquid phase after being generated, the sliding block can freely slide within the range of 10mm-200mm, but hydrate particles can increase the viscosity of fluid and reduce the displacement rate of the sliding block, and the polymerization inhibition and performance of the hydrate can be evaluated by monitoring the movement rate of the sliding block; if the polymerization inhibitor performance is weaker, the aggregated hydrate is deposited on two sides of the kettle along with the movement of the sliding block, so that the movement range of the sliding block is reduced, but the aggregation force of the hydrate is lower due to the action of the polymerization inhibitor, and the sliding block can still move; if the hydrate polymerization inhibitor has poor performance, the deposited and aged hydrate can directly block the sliding block, and the sliding block is blocked without displacement. Based on the above, the polymerization inhibition performance is classified into A, B, C three stages. Under the action of polymerization inhibitor, the sliding block always moves normally in the whole experimental process, and the performance of the polymerization inhibitor is marked as A level, as shown in (c) of fig. 1; the hydrate aggregate is separated out in the whole experimental process, so that the movement range of the sliding block is reduced, but no blocking phenomenon exists, and the performance of the polymerization inhibitor is marked as B grade, as shown in (B) of fig. 1; the performance of the polymerization inhibitor was C-scale, as shown in fig. 1 (a), when the blocking phenomenon of the slide block was present during the whole experiment. The volume fraction of the hydrate in the kettle can be calculated by using the monitored temperature and pressure data, and the calculation method of the volume fraction of the hydrate comprises the following steps:
wherein V is hyd Represents the volume of the hydrate formed in mL; v (V) oil Is the volume of white oil, mL; v (V) water Is the initial volume of water, mL; v (V) water,conv To the volume of water converted to hydrate, mL.
For the evaluation of the A-level polymerization inhibitor, the polymerization inhibition performance of the hydrate cannot be compared through the motion analysis of the slide block, and in order to further evaluate the polymerization inhibition effect among the A-level polymerization inhibitors, the displacement rate of the slide block is calculated and used for representing the change of the viscosity of the fluid caused by the generation and aggregation of the hydrate in the system. The hydrate inhibitor with stronger polymerization inhibition performance has smaller hydrate particles generated by the system, lower fluid viscosity and smaller displacement rate of the sliding block. The movement range of the sliding block from the bottom end of the kettle to the top end of the kettle is the displacement of the sliding block, which is marked as L, and the time consumed by the displacement is marked as deltat. The displacement rate of the slider is calculated as follows:
wherein L is the displacement of the sliding block, and mm; Δt is the time of displacement of the slider, sThe method comprises the steps of carrying out a first treatment on the surface of the v is the displacement rate of the slide block, mm.s -1 。
The polymerization inhibition effect of the hydrate polymerization inhibitor designed by the invention can be judged according to the final sliding block movement range and movement speed under the same hydrate volume fraction, and under the final hydrate volume fraction, the larger the final sliding block movement range is, the higher the polymerization inhibition performance grade is, the better the polymerization inhibitor performance is proved, the strength of the polymerization inhibition performance can be distinguished by comparing the sliding block movement speed under the same sliding block movement range, and the larger the sliding block movement speed is, the smaller the viscosity inhibition is, and the stronger the polymerization inhibition performance is indicated. Before the experiment starts, the end cover of the reaction kettle is opened, petroleum ether is added to repeatedly clean the inner wall of the reaction kettle, and the reaction kettle is dried after being cleaned. And (3) preparing the No. 5 white oil, deionized water and a polymerization inhibitor into an oil-water mixed solution according to a certain proportion, adding the oil-water mixed solution into a reaction kettle, screwing an end cover of the reaction kettle, sequentially vacuumizing the reaction kettle until the gauge pressure value is stable, and setting the water bath to be 16 ℃. After the temperature in the reaction kettle is stable, a gas cylinder switch, a six-way valve and a reaction kettle gas inlet valve are opened, high-purity methane is introduced into the kettle, and after the experimental pressure is reached, the switch and the valve are closed. Opening the control box and the motor power supply, setting the swing angle and the swing frequency of the swing kettle on the control box, starting the swing of the reaction kettle under the drive of the motor and the rotating shaft, and rapidly dissolving methane in white oil and water. The pressure in the reaction kettle is stabilized at 8MPa, the water bath temperature is set to be 0 ℃, the temperature is reduced at a constant speed of 2 ℃/h, and meanwhile, the data acquisition function is started, and the temperature, pressure and position data in the hydrate generation process are recorded. And the temperature and the pressure are stabilized again, so that the generation of the hydrate is finished, the water bath is closed, the data acquisition is performed, the control box and the motor power supply are closed, the gas in the reaction kettle is slowly discharged through the exhaust port, and the liquid is prevented from entering the high-pressure hose due to the sudden pressure drop. And after the gas is exhausted, pouring out the waste liquid in the reaction kettle, and ending the test.
The high-pressure stirred tank experimental device mainly comprises a reaction tank body, a gas injection system, a temperature control system, a data acquisition system and a stirring system. The volume of the reaction kettle is 1038mL, the material is 316 stainless steel, and the maximum operating pressure is 30MPa. The gas injection system comprises a gas cylinder, a booster pump, a vacuum pump, a gas pipeline and a valve, and the gasThe body is injected into the kettle through a pipeline and a plurality of valves. The temperature control system adopts THD-3030 water bath device purchased from Ottoman instruments, hezhou gold altar, and can control the temperature to be between-30 ℃ and 100 ℃, the temperature fluctuation range is +/-0.05 ℃, the digital display resolution is 0.01, and the pump flow is 12 L.min -1 . The data acquisition system comprises a temperature sensor, a pressure sensor and data recording software, wherein the temperature in the kettle is monitored in real time by adopting a Pt 100A-level thermal resistor, the precision of the pressure sensor is +/-0.25 percent, the current sensor is arranged, the current data of the stirring motor can be monitored, and the temperature, the pressure and the current data in the kettle can be checked and stored in real time by the data recording software. The stirring system is realized by driving the impeller to rotate through the motor, and the rotating speed of the stirring paddle is 0-1200rpm. The testing steps comprise: (1) Repeatedly cleaning the stirring kettle with petroleum ether, cleaning and drying. (2) And adding the No. 5 white oil, deionized water and a polymerization inhibitor into a stirring kettle according to a certain proportion, and vacuumizing the kettle. (3) The gas cylinder and the gas inlet valve are opened, the gas cylinder is closed after the acidic mixed gas is injected into the kettle to the experimental pressure, the rotating speed of the stirring kettle rotor is set to 300rpm, and the water bath temperature is set to 16 ℃. (4) And (3) rapidly dissolving the gas in the solution, and repeating the step (2) until the temperature and the pressure in the stirring kettle are stabilized at the experimental temperature and the pressure. (5) The water bath temperature is set to be 0 ℃, the reaction kettle is cooled at a constant speed, and the experimental temperature after cooling is 2.5 ℃. And recording the temperature, pressure and current data in the kettle. The influence of the polymerization inhibitor on the fluidity of the hydrate slurry under different conditions is determined by analyzing the temperature, the pressure, the volume fraction of the hydrate and the relative current in the experiment, so that the performance of the polymerization inhibitor is evaluated.
In the experimental process, the viscosity of a liquid phase is increased by hydrate generation and aggregation, the higher the aggregation degree of the hydrate is, the higher the viscosity of slurry is, and the larger the torque born by a stirring paddle is, which is reflected in a numerical value as a current value of a stirring motor. In order to eliminate errors among different experiments as far as possible, the relative current is used for representing the change of the viscosity of the fluid in the system, the relative current is obtained by using the ratio of the real-time current to the initial current of the experiment and is a dimensionless parameter, therefore, the performance of the hydrate polymerization inhibitor can be evaluated by adopting the magnitude of the relative current value, and the stronger the polymerization inhibition performance is, the smaller the relative current of the stirring motor is. The relative current is expressed as:
wherein: i t mA is a current value measured at a certain moment in an experiment; i i The initial current of the experiment, i.e., the steady current value before hydrate formation, was mA.
Comparative example 1, comparative example 2 and comparative example 3 are respectively a stearic acid amidopropyl dimethylamine system with a saturated carbon chain of R group of 17 and a behenic acid amidopropyl dimethylamine system with a saturated carbon chain of R group of 21, wherein no polymerization inhibitor system is added. Examples 1 to 11 are the single fatty acid amidopropyl dimethylamine systems of the invention. Examples 12 to 16 are the comparison of the fatty acid amidopropyl dimethylamine and nanosilica complex system of the present invention with a single fatty acid amidopropyl dimethylamine system.
Comparative example 1
70ml of No. 5 white oil and 30ml of deionized water are prepared into an oil-water solution (the water content is 30%) and added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested (the polymerization inhibitor is not added in a blank group) under the condition that the initial pressure is 8MPa and the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 6.58%, the displacement of the final sliding block is 0, and the polymerization inhibition grade is C grade.
Comparative example 2
80ml of No. 5 white oil and 20ml of deionized water are prepared into an oil-water solution (the water content is 20%), 2wt% of stearic acid amide propyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 6.44%, the displacement of the final sliding block is 0, and the polymerization inhibition grade is C grade.
Comparative example 3
80ml of No. 5 white oil and 20ml of deionized water are prepared into an oil-water solution (the water content is 20%), 2wt% of behenamide propyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 6.73%, the displacement of the final sliding block is 0, and the polymerization inhibition grade is C grade.
Example 1
80ml of No. 5 white oil and 20ml of deionized water are prepared into an oil-water solution (the water content is 20%), 2wt% of the caproic acid amide propyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 21.39%, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, and the polymerization inhibition grade is A grade.
Example 2
70ml of No. 5 white oil and 30ml of deionized water are prepared into an oil-water solution (the water content is 30%), 2wt% of caproic acid amide propyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 23.9%, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, and the polymerization inhibition grade is A grade.
Example 3
70ml of No. 5 white oil and 30ml of deionized water are prepared into an oil-water solution (the water content is 30%), 2wt% of lauramidopropyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 24.28%, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, and the polymerization inhibition grade is A grade.
Example 4
70ml of No. 5 white oil and 30ml of deionized water are prepared into an oil-water solution (the water content is 30%), 2wt% of oleamide propyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 23.65%, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, and the polymerization inhibition grade is A grade.
Example 5
70ml of No. 5 white oil and 30ml of deionized water are prepared into an oil-water solution (the water content is 30%), 2wt% of erucic acid amide propyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 22.46%, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, and the polymerization inhibition grade is A grade.
Example 6
80ml of No. 5 white oil and 20ml of deionized water are prepared into an oil-water solution (the water content is 20%), 2wt% of lauramidopropyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 23.25%, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, and the polymerization inhibition grade is A grade.
Example 7
40ml of No. 5 white oil and 60ml of deionized water are prepared into an oil-water solution (the water content is 60%), 2wt% of lauramidopropyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 22.48%, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, and the polymerization inhibition grade is A grade.
Example 8
20ml of No. 5 white oil and 80ml of deionized water are prepared into an oil-water solution (the water content is 80%), 2wt% of lauramidopropyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 21.67%, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, and the polymerization inhibition grade is A grade.
Example 9
70ml of No. 5 white oil and 30ml of deionized water are prepared into an oil-water solution (the water content is 30%), 1.5wt% of lauramidopropyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 23.61%, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, and the polymerization inhibition grade is A grade.
Example 10
70ml of No. 5 white oil and 30ml of deionized water are prepared into an oil-water solution (the water content is 30%), 1wt% of lauramidopropyl dimethylamine is added, and the mixture is added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 22.35%, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, and the polymerization inhibition grade is A grade.
Example 11
70ml of No. 5 white oil and 30ml of deionized water are prepared into an oil-water solution (the water content is 30%), and then 0.5wt% of lauramidopropyl dimethylamine is added and added into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fraction of the final hydrate is 21.26%, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, and the polymerization inhibition grade is A grade.
Example 12
The method comprises the steps of adopting a swinging kettle to carry out two experiments, preparing 70ml of No. 5 white oil and 30ml of deionized water into an oil-water solution (the water content is 30%), adding only single 2wt% of lauramidopropyl dimethylamine for the first time, and adding 2wt% of lauramidopropyl dimethylamine and 0.4wt% of hydrophilic nano SiO for the second time 2 Adding the mixture into a swinging kettle. The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fractions of the final hydrate are 24.64 percent and 22.42 percent respectively, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, the polymerization inhibition grade is A grade, and the displacement speed of the sliding block is found that 0.4 weight percent of hydrophilic nano SiO is added 2 The displacement rate of the rear sliding block is obviously improved.
Example 13
The rocking kettle is adopted to carry out two experiments, 70ml of No. 5 white oil and 30ml of deionized water are prepared into an oil-water solution (the water content is 30%), only single 0.5wt% of lauramidopropyl dimethylamine is added for the first time, and 0.5wt% of lauramidopropyl dimethylamine and 0.1wt% of hydrophilic nano SiO are added for the second time 2 . The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 8MPa, the experimental temperature is 2.5 ℃, the temperature and the pressure are not changed after 12 hours, the hydrate is completely generated, the volume fractions of the final hydrate are 23.64% and 23.26% respectively, the final movement range of the sliding block is 10mm-200mm, the displacement of the final sliding block is 190mm, the polymerization inhibition grade is A grade, and the hydrophilic nano SiO of 0.1wt% is added through the displacement rate discovery of the comparison sliding block 2 The displacement rate of the rear sliding block is obviously improved.
Example 14
The experiment was carried out twice by using a stirred tank, 180ml of white oil No. 5 and 420ml of deionized water were prepared into an oil-water solution (water content: 30%), and only a single 0.5wt% cocoamidopropyl dimethylamine was added for the first time, and 0.5wt% coco was added for the second timeAmidopropyl dimethylamine and 0.1wt% hydrophobic nano SiO 2 . The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 9MPa and the experimental temperature is 2.0 ℃, the hydrate is completely generated, the volume fractions of the final hydrate are respectively 32.05 percent and 32.06 percent, and the comparison shows that 0.1 weight percent of hydrophobic nano SiO is added 2 The relative current is significantly reduced afterwards.
Example 15
Adopting a stirring kettle to carry out two experiments, preparing 180ml of No. 5 white oil and 420ml of deionized water into an oil-water solution (the water content is 30%), adding only 0.5wt% of cocamidopropyl dimethylamine for the first time, and adding 0.5wt% of cocamidopropyl dimethylamine and 0.25wt% of hydrophobic nano SiO for the second time 2 . The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 9MPa and the experimental temperature is 2.0 ℃, the hydrate is completely generated, the volume fractions of the final hydrate are respectively 32.05 percent and 32.06 percent, and the comparison shows that the final hydrate is added with 0.25 weight percent of hydrophobic nano SiO 2 The relative current is significantly reduced afterwards.
Example 16
Adopting a stirring kettle to carry out two experiments, preparing 180ml of No. 5 white oil and 420ml of deionized water into an oil-water solution (the water content is 30%), adding only 0.5wt% of cocamidopropyl dimethylamine for the first time, and adding 0.5wt% of cocamidopropyl dimethylamine and 0.5wt% of hydrophobic nano SiO for the second time 2 . The experimental gas is pure methane, the performance of the polymerization inhibitor is tested under the condition that the initial pressure is 9MPa and the experimental temperature is 2.0 ℃, the hydrate is completely generated, the volume fractions of the final hydrate are respectively 32.05 percent and 32.11 percent, and the comparison shows that 0.5 weight percent of hydrophobic nano SiO is added 2 The relative current is significantly reduced afterwards.
FIG. 1 is a standard chart of polymerization inhibition grade division in a swinging kettle, if the polymerization inhibitor has strong performance, hydrate is dispersed in a liquid phase after being generated, a sliding block can freely slide within the range of 10mm-200mm, and the performance of the polymerization inhibitor is marked as grade A in FIG. 1 (c); if the polymerization inhibitor performance is weaker, hydrate aggregate is separated out in the whole experimental process, so that the movement range of the sliding block is reduced but no blocking phenomenon exists, and the performance of the polymerization inhibitor is marked as B grade, as shown in (B) of fig. 1; if the hydrate polymerization inhibitor has poor performance, the deposited and aged hydrate can directly block the sliding block, the sliding block is blocked and has no displacement, and the performance of the polymerization inhibitor is grade C.
FIG. 2 is an image of the change over time of the pressure, temperature, volume fraction of hydrate and slide position of comparative example 1 of the present invention in a rocking kettle, and it can be seen from FIG. 2 that a hydrate plug is formed at a low volume fraction of 6% without any polymerization inhibitor added, and the slide position remains unchanged due to the hydrate plug after the start of the experiment for 6 hours, with a displacement of 0.
FIG. 3 is an image of the change over time of the volume fraction of the hydrate and the position of the slide block of comparative example 2 of the present invention in a rocking kettle, and it can be seen from FIG. 3 that a hydrate plug is formed at a low volume fraction of 9% with the addition of 2wt% stearamidopropyl dimethylamine, and the position of the slide block remains unchanged after 6.4 hours from the start of the experiment due to the hydrate plug, the displacement amount is 0, which proves that the polymerization inhibitor performance of the hydrate is poor, the polymerization inhibition performance is class C, and the formation of the hydrate cannot be prevented.
FIG. 4 is an image of the pressure, temperature, volume fraction of hydrate, and position of the slide block of example 3 of the present invention in a rocking kettle over time, and it can be seen from FIG. 4 that the slide block can freely slide in the range of 10mm to 200mm with the addition of 2wt% lauramidopropyl dimethylamine in the whole experimental process, with a displacement of 190mm, compared with the comparative example 2 no-addition system and the ineffective polymerization inhibitor system of comparative example 3. The polymerization inhibitor has excellent performance, the polymerization inhibition performance is grade A, and the aggregation of the hydrate can be prevented at the final volume fraction of 24.28% of the hydrate.
FIG. 5 is a swing kettle incorporating 0.5wt% lauramidopropyl dimethylamine and 0.1wt% hydrophilic nano SiO in example 13 of the present invention 2 As can be seen from FIG. 5, in comparison with the system of comparative example 2 without addition and the system of comparative example 3 without the polymerization inhibitor, 0.5wt% of lauramidopropyl dimethylamine and 0.1wt% of hydrophilic nano SiO were added 2 The sliding block can freely slide within the range of 10mm-200mm in the whole experimental process, and the displacement is that190mm. The polymerization inhibitor has excellent performance, the polymerization inhibition performance is grade A, and the aggregation of the hydrate can be prevented at the final volume fraction of 23.26% of the hydrate.
FIG. 6 is a graph showing the velocity of displacement of the slide of example 13 of the present invention as a function of the integral number of hydrate bodies in a rocking kettle. The sliding blocks in the two groups of experiments can freely slide within the range of 10mm-200mm, the displacement is 190mm, the polymerization inhibitor has excellent performance, the polymerization inhibition performance is A level, and the aggregation of hydrates can be prevented under the final volume fractions of 23.64% and 23.26% of hydrates respectively. For the polymerization inhibitor with excellent performance, although the hydrate can be dispersed in a liquid phase after being generated, the sliding block freely slides within the range of 10mm-200mm, the hydrate particles can increase the viscosity of fluid and reduce the displacement rate of the sliding block, and the viscosity of hydrate slurry and the resistance of the sliding block in the movement process can be obtained by monitoring the movement rate of the sliding block, so that the performance of the polymerization inhibitor of the hydrate is evaluated. The larger the movement speed of the sliding block is, the smaller the viscosity of the hydrate slurry is, the smaller the resistance of the sliding block is, and the stronger the performance of the hydrate polymerization inhibitor is proved. As can be seen from FIG. 6, 0.1wt% hydrophilic nano SiO was added as compared to the single 0.5wt% lauramidopropyl dimethylamine system 2 The displacement rate of the rear sliding block is obviously reduced, which proves that 0.5 weight percent of lauramidopropyl dimethylamine and 0.1 weight percent of hydrophilic nano SiO 2 The properties of the slurry in the hydrate dispersion system are more excellent, and the viscosity of the slurry in the hydrate dispersion system can be reduced.
FIG. 7 is a graph of the relative current as a function of the integral of hydrate for example 14 of the present invention in a stirred tank. In the experimental process, the viscosity of a liquid phase is increased by hydrate generation and aggregation, the higher the aggregation degree of the hydrate is, the higher the viscosity of slurry is, and the larger the torque born by a stirring paddle is, which is reflected in a numerical value as a current value of a stirring motor. The performance of the hydrate polymerization inhibitor can be evaluated by adopting the magnitude of the relative current value, and the stronger the polymerization inhibition performance is, the smaller the relative current of the stirring motor is. As can be seen from FIG. 7, the single 0.5wt% cocoamidopropyl dimethylamine system increased to 30% by volume of hydrate, the relative current increased to 3.75 peak, and the integral of hydrate increased to the final 32.05%, and part of hydrate was broken by stirring with a stirring blade, and the relative electricity was obtainedThe flow was reduced to 2.2. And 0.5wt% of cocamidopropyldimethylamine plus 0.1wt% of hydrophobic nano SiO is added 2 After that, the relative current was significantly reduced compared to the single 0.5wt% cocoamidopropyl dimethylamine system, with relative current values of less than 1.4 throughout the entire experiment, in the range of 0-32.11% hydrate volume fraction. Proved to be added with 0.1 weight percent of hydrophobic nano SiO 2 The polymerization inhibitor of the hydrate after the system has stronger polymerization inhibition performance, the viscosity of the hydrate slurry is smaller, and the torque born by the stirring paddle is smaller.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The fatty acid amide propyl dimethylamine hydrate polymerization inhibitor is characterized by comprising fatty acid amide propyl dimethylamine, wherein the fatty acid amide propyl dimethylamine has a structural general formula shown in a formula I, and R in the formula I is saturated hydrocarbon group with 1-18 carbon atoms or unsaturated hydrocarbon group with 1-22 carbon atoms;
2. a fatty acid amidopropyl dimethylamine hydrate inhibitor according to claim 1, wherein said fatty acid amidopropyl dimethylamine is selected from any one of the following;
the fatty acid amidopropyl dimethylamine is capridemic acid amidopropyl dimethylamine with a molecular formula of C 13 H 28 N 2 O has a structural formula shown as a formula II,
the fatty acid amidopropyl dimethylamine is caproic acid amidopropylDimethylamine with molecular formula C 15 H 32 N 2 O has a structural formula shown in a formula III,
the fatty acid amide propyl dimethylamine is lauramide propyl dimethylamine with a molecular formula of C 17 H 36 N 2 O has a structural formula shown in a formula IV,
the fatty acid amidopropyl dimethylamine is oleic acid amidopropyl dimethylamine with a molecular formula of C 23 H 46 N 2 O has a structural formula shown in a formula V,
the fatty acid amidopropyl dimethylamine is linoleic acid amidopropyl dimethylamine with a molecular formula of C 23 H 44 N 2 O has a structure shown in a formula VI,
the fatty acid amide propyl dimethylamine is ricinoleic acid amide propyl dimethylamine with a molecular formula of C 23 H 46 N 2 O 2 The structural formula is shown as a formula VII,
the fatty acid amide propyl dimethylamine is erucic acid amide propyl dimethylamine with a molecular formula of C 27 H 54 N 2 O has a structural formula shown as a formula VIII,
3. the fatty acid amide propyl dimethylamine hydrate polymerization inhibitor according to claim 2, wherein the mass fraction of the fatty acid amide propyl dimethylamine is 0.5-2 wt%.
4. The polymerization inhibitor for fatty acid amide propyl dimethylamine hydrate according to claim 1, further comprising nanoparticles, wherein the polymerization inhibitor is mainly compounded by fatty acid amide propyl dimethylamine and nanoparticles.
5. The polymerization inhibitor for fatty acid amide propyl dimethylamine hydrate according to claim 4, wherein the nanoparticle is prepared from silicon dioxide, ferroferric oxide, titanium dioxide, zinc oxide, ferric oxide or aluminum oxide.
6. A fatty acid amide propyl dimethylamine hydrate inhibitor according to claim 4, wherein the mass fraction of fatty acid amide propyl dimethylamine is 0.5wt% to 2wt%, and the mass fraction of the nanoparticles is 0.1wt% to 0.5wt%.
7. The use of the fatty acid amide propyl dimethylamine hydrate inhibitor according to any one of claims 1-6 for controlling gas hydrates in deep water oil and gas gathering and transportation pipelines.
8. The application of the fatty acid amide propyl dimethylamine hydrate polymerization inhibitor in the prevention and treatment of gas hydrates in deep water oil and gas gathering and transportation pipelines according to claim 7, which is characterized by being applicable to an oil, gas and water three-phase coexisting system, and the water content application range is 20-80%.
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| CN118222263A (en) * | 2024-03-13 | 2024-06-21 | 中国石油大学(华东) | Composite hydrate blocking remover and application thereof |
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