CN111440600A - Lubrication inhibitor for drilling fluid and preparation method thereof - Google Patents
Lubrication inhibitor for drilling fluid and preparation method thereof Download PDFInfo
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- CN111440600A CN111440600A CN202010242032.8A CN202010242032A CN111440600A CN 111440600 A CN111440600 A CN 111440600A CN 202010242032 A CN202010242032 A CN 202010242032A CN 111440600 A CN111440600 A CN 111440600A
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- fatty acid
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- chain fatty
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- 238000005553 drilling Methods 0.000 title claims abstract description 44
- 239000003112 inhibitor Substances 0.000 title claims abstract description 39
- 238000005461 lubrication Methods 0.000 title claims abstract description 39
- 239000012530 fluid Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title abstract description 6
- -1 amino compound Chemical class 0.000 claims abstract description 35
- 150000004668 long chain fatty acids Chemical class 0.000 claims abstract description 33
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000002904 solvent Substances 0.000 claims abstract description 11
- 238000007112 amidation reaction Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 40
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000000539 dimer Substances 0.000 claims description 13
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 11
- 239000000194 fatty acid Substances 0.000 claims description 11
- 229930195729 fatty acid Natural products 0.000 claims description 11
- 150000004665 fatty acids Chemical class 0.000 claims description 11
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 239000003921 oil Substances 0.000 claims description 9
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 8
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 8
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 8
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 235000019198 oils Nutrition 0.000 claims description 6
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 5
- 239000008158 vegetable oil Substances 0.000 claims description 5
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 4
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052797 bismuth Inorganic materials 0.000 claims description 4
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 4
- 239000003960 organic solvent Substances 0.000 claims description 4
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 2
- 150000004982 aromatic amines Chemical class 0.000 claims description 2
- 150000004985 diamines Chemical class 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 229920000768 polyamine Polymers 0.000 claims description 2
- 150000004671 saturated fatty acids Chemical class 0.000 claims description 2
- 150000004670 unsaturated fatty acids Chemical class 0.000 claims description 2
- 235000021122 unsaturated fatty acids Nutrition 0.000 claims description 2
- 239000008096 xylene Substances 0.000 claims description 2
- 150000002902 organometallic compounds Chemical group 0.000 claims 2
- 239000004135 Bone phosphate Substances 0.000 claims 1
- 239000013638 trimer Substances 0.000 claims 1
- 230000005764 inhibitory process Effects 0.000 abstract description 13
- 230000007613 environmental effect Effects 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 229920002521 macromolecule Polymers 0.000 abstract description 3
- 239000000126 substance Substances 0.000 description 14
- 230000001050 lubricating effect Effects 0.000 description 8
- CFQZKFWQLAHGSL-FNTYJUCDSA-N (3e,5e,7e,9e,11e,13e,15e,17e)-18-[(3e,5e,7e,9e,11e,13e,15e,17e)-18-[(3e,5e,7e,9e,11e,13e,15e)-octadeca-3,5,7,9,11,13,15,17-octaenoyl]oxyoctadeca-3,5,7,9,11,13,15,17-octaenoyl]oxyoctadeca-3,5,7,9,11,13,15,17-octaenoic acid Chemical compound OC(=O)C\C=C\C=C\C=C\C=C\C=C\C=C\C=C\C=C\OC(=O)C\C=C\C=C\C=C\C=C\C=C\C=C\C=C\C=C\OC(=O)C\C=C\C=C\C=C\C=C\C=C\C=C\C=C\C=C CFQZKFWQLAHGSL-FNTYJUCDSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 5
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 4
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 4
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 4
- 235000010469 Glycine max Nutrition 0.000 description 4
- 244000068988 Glycine max Species 0.000 description 4
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 4
- 239000005642 Oleic acid Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 4
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 4
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 4
- 241001460053 Laides Species 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009775 high-speed stirring Methods 0.000 description 3
- 239000004530 micro-emulsion Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004359 castor oil Substances 0.000 description 2
- 235000019438 castor oil Nutrition 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002736 metal compounds Chemical class 0.000 description 2
- 231100000989 no adverse effect Toxicity 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical group NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 229940125904 compound 1 Drugs 0.000 description 1
- 229940125782 compound 2 Drugs 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- QYDYPVFESGNLHU-UHFFFAOYSA-N elaidic acid methyl ester Natural products CCCCCCCCC=CCCCCCCCC(=O)OC QYDYPVFESGNLHU-UHFFFAOYSA-N 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- SYECJBOWSGTPLU-UHFFFAOYSA-N hexane-1,1-diamine Chemical compound CCCCCC(N)N SYECJBOWSGTPLU-UHFFFAOYSA-N 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- BHGADZKHWXCHKX-UHFFFAOYSA-N methane;potassium Chemical compound C.[K] BHGADZKHWXCHKX-UHFFFAOYSA-N 0.000 description 1
- QYDYPVFESGNLHU-KHPPLWFESA-N methyl oleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC QYDYPVFESGNLHU-KHPPLWFESA-N 0.000 description 1
- 229940073769 methyl oleate Drugs 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/28—Preparatory processes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/34—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids using polymerised unsaturated fatty acids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
-
- C—CHEMISTRY; METALLURGY
- 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
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
-
- 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
- C09K2208/34—Lubricant additives
Abstract
The invention discloses a lubrication inhibitor for drilling fluid and a preparation method thereof, wherein the lubrication inhibitor is prepared by amidation reaction of long-chain fatty acid and micromolecular amino compound, and the raw material formula comprises 50-80 parts of long-chain fatty acid, 10-30 parts of micromolecular amino compound, 0.1-1 part of catalyst and 2-39 parts of solvent. The lubrication inhibitor is a macromolecule amine-terminated amide compound, has good functions of environmental protection, lubrication, inhibition and the like, has relatively good dispersibility in water, and is particularly suitable for being used as the lubrication inhibitor in high-difficulty complex structural wells such as horizontal wells, extended reach wells and the like.
Description
Technical Field
The invention belongs to the technical field of drilling treatment agents, and particularly relates to a lubrication inhibitor for drilling fluid and a preparation method thereof.
Background
With the increase of world energy demand and the development of drilling technology, the treating agent for the drilling fluid becomes an indispensable part in the drilling process. Due to the increasing drilling depth, the drilling of the formation is becoming more and more complex and the environmental protection is becoming more and more important, the drilling operation demands more and more on the drilling fluid treatment agent.
In order to greatly increase the length of a well production layer and the area of the production layer, improve the yield of an oil well and realize the effect of less wells and high yield, a horizontal well and large displacement drilling technology becomes one of key technologies for exploration and development of current oil and gas resources. From the end of the last 80 th century, in order to improve the comprehensive economic benefit of exploration and development, oil and gas companies in the world raise the heat tide of horizontal wells, and obtain great economic benefit in life.
Many oil and gas layers in China are in areas rich in shale, strong-dispersion formations, complex formations such as hard and brittle shale development and the like, and the operation in the areas, particularly horizontal wells and extended reach wells, has more strict requirements on lubrication inhibition and has good lubricity and inhibition. Although the types of lubricants and inhibitors on the market are various, the lubricants, inhibitors and environmental protection cannot be achieved at the same time. The performance of the conventional lubrication inhibitor which can meet the environmental protection requirement is not enough, so that the lubrication inhibition performance of the drilling fluid is difficult to ensure.
In order to improve the lubrication inhibition performance, chinese patent publication No. CN105112029A (kokai No. 2015-12-02) discloses a bonding type lubrication inhibitor, which is prepared by reacting vegetable oil fatty acid with alcohol amine to generate fatty acid hydroxylamine through amidation reaction, and then compounding with synthetic oil, alkyl pyrrolidone, imidazole quaternary ammonium salt, castor oil sodium sulfonate and the like, wherein the fatty acid hydroxylamine plays a role in uniformly dispersing water-dispersed alkyl pyrrolidone, imidazole quaternary ammonium salt and castor oil sodium sulfonate to an oil phase, thereby playing a lubrication inhibition effect. The bonding type lubrication inhibitor and the water-based drilling fluid can be adsorbed on the surfaces of a drilling tool and a well wall, have good lubrication effect and strong high-temperature and high-pressure resistance, and can greatly reduce the probability of underground accidents. Because the main raw material is synthetic oil, the product mainly has lubricating property and has limited inhibitive performance.
Chinese patent publication No. CN 108893100a (published 2018-11-27) discloses a lubricating inhibitor nano ester-based hydrate for drilling fluid, wherein nano silica powder is added in the emulsification process of methyl potassium silicate, methyl oleate, mineral oil and the like to play a role in lubricating inhibition.
At present, most of oily lubricants disperse grease in drilling fluid by virtue of a surfactant, however, emulsion droplets formed by an oil phase of the lubricant are equivalent to elastic particles in the drilling process, which can cause adverse effects on the rheological property of the drilling fluid, and meanwhile, the distribution state of a friction layer is greatly influenced by the dispersion degree of the emulsion droplets, so that an even lubricating layer is not easily formed on a stress surface, and thus, the oil-based lubricating agent has an unobvious use effect in wells with complex structures such as a large inclination, a horizontal well and a large displacement well, and can not effectively solve or reduce the complex conditions in the well.
In order to effectively solve the problems, the lubricating inhibition agent has good lubricating inhibition performance, relatively good dispersibility in water, can be well dispersed in a drilling fluid in a molecular or micro-emulsion mode under high-speed stirring, does not cause adverse effect on rheological property of the drilling fluid, is environment-friendly, is used for solving the lubricating inhibition problem of high-difficulty complex-structure wells such as horizontal wells, extended reach wells and the like, and has good prospect in the application of oil-gas field drilling development.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a lubricating inhibitor for drilling fluid and a preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a lubrication inhibitor for drilling fluid is an amide compound formed by amidation reaction of long-chain fatty acid and a small molecular amino compound, wherein the lubrication inhibitor for drilling fluid comprises the following raw materials in parts by weight:
further, the lubrication inhibitor is a macromolecular amino-terminated amide compound in which the ratio of the sum of the moles of primary and secondary amino groups in the small molecular amino compound to the moles of-COOH of the long chain fatty acid is R, 2< R < 3. When R is less than 2, the process is unstable, the gelation phenomenon is easy to occur, and the obtained product contains a carboxyl-terminated compound; and when R is more than 3, a large amount of small molecular amino compounds remain in the product, and the product has a large pungent smell.
Further, the long-chain fatty acid is a saturated fatty acid or an unsaturated fatty acid, the carbon chain length of the long-chain fatty acid is C12 or more, the long-chain fatty acid is one or more of monoacid, diacid and triacid, and 2< R < 2.5.
Further, the long-chain fatty acid is one or more of vegetable oil fatty acid, and/or dimerized fatty acid or trimerized fatty acid synthesized by vegetable oil fatty acid.
Further, the small molecular amine compound is lower aliphatic amine or aromatic amine, and is one or more of diamine, triamine or polyamine.
Further, the small molecular amino compound is one or more of ethylenediamine, diethylenetriamine, hexamethylenediamine and p-phenylenediamine.
Furthermore, the catalyst is an organic metal compound, and the solvent is an organic solvent.
Further, the organic metal compound is one or more of organic tin, organic zinc and organic bismuth; the organic solvent is one or more of dimethyl carbonate, propylene glycol methyl ether acetate, xylene and the like.
The invention also provides a preparation method of the lubrication inhibitor for the drilling fluid, which comprises the following steps:
(1) adding a certain proportion of long-chain fatty acid and a solvent into a reaction kettle, stirring and heating;
(2) adding small molecular amino compound, and stirring at high speed for 20-30 min;
(3) adding catalyst, and stirring at high speed for 20-30 min;
(4) heating to 80-100 ℃, stirring, and reacting for 1-2 h;
(5) vacuumizing, stirring, continuously reducing pressure, and reacting for 2-3 h;
(6) cooling and discharging to obtain the product.
Further, in the step (2), a small molecular amino compound is added at the temperature of 50-65 ℃, and in the step (6), the temperature is reduced to be below 50 ℃ for discharging.
The invention has the beneficial effects that:
the lubrication inhibitor provided by the invention is a macromolecule amine-terminated amide compound, which is formed by amidation reaction of long-chain fatty acid and a micromolecule amine compound, wherein the molecular structure of the macromolecule amine-terminated amide compound is hydrophobic in the carbon long chain, so that good lubricity is provided, and the amide group and the amine-terminated group effectively inhibit hydration and dispersion of clay, provide strong inhibition and provide better compatibility with water.
The lubrication inhibitor provided by the invention has good functions of environmental protection, lubrication, inhibition and the like, has relatively good dispersibility in water, can be well dispersed in a molecular or micro-emulsion form in the drilling fluid under high-speed stirring, has no adverse effect on the rheological property of the drilling fluid, and is particularly suitable for being used as the lubrication inhibitor in high-difficulty complex structural wells such as horizontal wells, extended reach wells and the like.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be further described in detail with reference to the following detailed description. The raw materials and equipment in the examples are all commercially available. Each kilogram of starting material corresponds to one part by weight in all examples.
Example 1
The embodiment provides a lubrication inhibitor, which comprises the following raw materials in parts by weight: 80kg of long-chain fatty acid (dimer acid, molecular weight 564.9, Anhui Anqing Rantai), 17.4kg of small-molecule amino compound (ethylenediamine, molecular weight 60, Shandong Laide chemical), 0.1kg of catalyst (organotin, T12, American gas chemical), and 2.5kg of solvent (dimethyl carbonate, Shandong petrochemical Shenghua chemical), wherein the ratio R of the sum of the moles of primary and secondary amino groups in the small-molecule amino compound to the mole of-COOH of the long-chain fatty acid is 2.03.
Adding 80kg of dimer acid and 2.5kg of dimethyl carbonate into a reaction kettle, stirring at a high speed, and heating; adding 17.4kg of ethylenediamine at about 60 ℃, and stirring at high speed for 30 min; adding 0.1kg of T12, and stirring at high speed for 30 min; heating to 80 ℃, stirring, and reacting for 2 hours; then vacuumizing, stirring, and continuously carrying out reduced pressure reaction for 3 hours; cooling to 50 ℃, and discharging to obtain a product.
Example 2
The embodiment provides a lubrication inhibitor, which comprises the following raw materials in parts by weight: 20kg of long-chain fatty acid 1 (soybean oleic acid, molecular weight 284, Hangzhou Yuhao chemical industry), 40kg of long-chain fatty acid 2 (dimer acid, molecular weight 564.9, Anhui Anqing hongtai), 27kg of small-molecular amino compound (hexanediamine, molecular weight 116.2, Nanjing blue white chemical industry), 0.5kg of catalyst (organic bismuth, Bicat8118, American advanced chemical industry) and 12.5kg of solvent (propylene glycol methyl ether acetate, Dow chemical industry), wherein R is 2.2.
Adding 20kg of soybean oleic acid, 40kg of dimer acid and 12.5kg of propylene glycol methyl ether acetate into a reaction kettle, stirring at a high speed, and heating; adding 27kg of hexamethylene diamine at about 50 ℃, and stirring at a high speed for 20 min; adding 0.5kg of organic bismuth Bicat8118, and stirring at high speed for 20 min; heating to 100 ℃, stirring, and reacting for 2 hours; then vacuumizing, stirring, and continuously carrying out reduced pressure reaction for 3 hours; cooling to 45 ℃, and discharging to obtain the product.
Example 3
The embodiment provides a lubrication inhibitor, which comprises the following raw materials in parts by weight: 42kg of long-chain fatty acid (long-chain fatty acid 1 (dimer acid, molecular weight of 564.9, Anhui Anqing Hongtai), 20kg of long-chain fatty acid 2 (trimer acid, molecular weight of 849, Anhui Qing Hongtai), 27kg of small molecular amino compound (p-phenylenediamine, molecular weight of 108, Nanjing Jirui), 0.5kg of catalyst (organic tin, T9, American gas chemistry), and 10.5kg of solvent (propylene glycol methyl ether acetate, Dow chemical industry), wherein R is 2.3.
Adding 42kg of dimer acid, 20kg of trimer acid and 10.5kg of propylene glycol methyl ether acetate into a reaction kettle, stirring at a high speed, and heating; adding 27kg of p-phenylenediamine at about 60 ℃, and stirring at a high speed for 30 min; adding 0.5kg of organic tin T9, and stirring at high speed for 30 min; heating to 85 ℃, stirring, and reacting for 1 h; then vacuumizing, stirring, and continuously carrying out reduced pressure reaction for 2 hours; cooling to 50 ℃, and discharging to obtain a product.
Example 4
The embodiment provides a lubrication inhibitor, which comprises the following raw materials in parts by weight: 20kg of long-chain fatty acid 1 (soybean oleic acid, molecular weight 284, Hangzhou Yuhao chemical industry), 25kg of long-chain fatty acid 2 (dimer acid, molecular weight 564.9, Anhui Anqing hongtai), 20kg of long-chain fatty acid 3 (trimer acid, molecular weight 849, Anhui hongtao), 12kg of small-molecular amino compound 1 (ethylenediamine, molecular weight 60, Shandong Laide chemical industry), 6kg of small-molecular amino compound 2 (diethylenetriamine, molecular weight 103, Tianjin flourishing), 1kg of catalyst (organic zinc, Bicat Z, Shanghai De Tong chemical industry), and 16kg of solvent (dimethyl carbonate, Shandong petrochemical industry), wherein R is 2.5.
Adding 20kg of soybean oleic acid, 25kg of dimer acid, 20kg of trimer acid and 16kg of dimethyl carbonate into a reaction kettle, stirring at a high speed, and heating; adding 12kg of ethylenediamine and 6kg of diethylenetriamine at about 60 ℃, and stirring at a high speed for 25 min; adding 1kg of organic zinc Bicat Z, and stirring at high speed for 25 min; heating to 90 ℃, stirring, and reacting for 1.5 h; then vacuumizing, stirring, and continuously carrying out reduced pressure reaction for 2.5 h; cooling to 50 ℃, and discharging to obtain a product.
Example 5
The embodiment provides a lubrication inhibitor, which comprises the following raw materials in parts by weight: long-chain fatty acid (dimer acid, molecular weight 564.9, Anhui Anqing Rantai 50kg, small molecular amino compound (ethylenediamine, molecular weight 60, Shandong Laide chemical industry)) 11kg, catalyst (organotin, T12, United states gas chemistry) 0.5kg, solvent (dimethyl carbonate, Shandong petrochemical industry) 38.5kg, wherein the ratio R of the sum of the moles of primary amino groups and secondary amino groups in the small molecular amino compound to the moles of-COOH of the long-chain fatty acid is 2.07.
Adding 50kg of dimer acid and 38.5kg of dimethyl carbonate into a reaction kettle, stirring at a high speed, and heating; adding 11kg of ethylenediamine at about 60 ℃, and stirring at a high speed for 30 min; adding 0.5kg of T12, and stirring at high speed for 30 min; heating to 80 ℃, stirring, and reacting for 2 hours; then vacuumizing, stirring, and continuously carrying out reduced pressure reaction for 3 hours; cooling to 50 ℃, and discharging to obtain a product.
Example 6
The embodiment provides a lubrication inhibitor, which comprises the following raw materials in parts by weight: 50kg of long-chain fatty acid (long-chain fatty acid 1 (dimer acid, molecular weight of 564.9, Anhui Anqing Hongtai), 20kg of long-chain fatty acid 2 (trimer acid, molecular weight of 849, Anhui Hongtai), 15kg of small-molecular amino compound (ethylenediamine, molecular weight of 60, Shandong Laidel chemical industry), 0.5kg of catalyst (organotin, T9, American gas chemistry) and 14.5kg of solvent (propylene glycol methyl ether acetate, Dow chemical industry), wherein R is 3.0.
Adding 50kg of dimer acid, 20kg of trimer acid and 14.5kg of propylene glycol methyl ether acetate into a reaction kettle, stirring at a high speed, and heating; adding 15kg of ethylenediamine at about 60 ℃, and stirring at high speed for 30 min; adding 0.5kg of T9, and stirring at high speed for 30 min; stirring, heating to 85 ℃, and reacting for 1 h; then vacuumizing, stirring, and continuously carrying out reduced pressure reaction for 2 hours; cooling to 50 ℃, and discharging to obtain a product.
The products obtained in examples 1 to 6 were tested according to the standards and testing methods relevant to drilling fluids, and the specific properties are shown in table 1.
TABLE 1 drilling fluid Performance index
Therefore, the products provided by the embodiments 1 to 6 are macromolecular terminal amino amide compounds obtained by amidation reaction of long-chain fatty acids and small-molecular amino compounds, have good functions of environmental protection, lubrication, inhibition and the like, have relatively good dispersibility in water, can be well dispersed in drilling fluid in a molecular or micro-emulsion form under high-speed stirring, have no adverse effect on rheological property of the drilling fluid, and are particularly suitable for being used as a lubrication inhibitor in wells with high difficulty and complex structures, such as horizontal wells, extended reach wells and the like.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims (10)
1. The lubrication inhibitor for the drilling fluid is an amide compound formed by amidation reaction of long-chain fatty acid and a small molecular amine compound, wherein the lubrication inhibitor for the drilling fluid comprises the following raw materials in parts by weight:
2. the lubrication inhibitor for drilling fluids according to claim 1, wherein the lubrication inhibitor is a macromolecular amino-terminated amide compound in which the ratio of the sum of the moles of primary and secondary amino groups in the small molecular amino compound to the moles of-COOH of the long chain fatty acid is R, 2< R < 3.
3. The lubricity inhibitor for drilling fluids according to claim 1, wherein the long chain fatty acid is a saturated fatty acid or an unsaturated fatty acid, the carbon chain length of the long chain fatty acid is C12 or more, the long chain fatty acid is one or more of a monobasic acid, a dibasic acid and a tribasic acid, and 2< R < 2.5.
4. The lubricity inhibitor for drilling fluids according to claim 3, wherein the long chain fatty acid is one or more of vegetable oil fatty acid, and/or dimer fatty acid or trimer fatty acid synthesized from vegetable oil fatty acid.
5. The lubrication inhibitor for drilling fluid according to claim 1, wherein the small molecular amine compound is a lower aliphatic amine or an aromatic amine and is one or more of diamine, triamine or polyamine.
6. The lubricity inhibitor for drilling fluids according to claim 5, wherein the small molecule amine compound is one or more of ethylenediamine, diethylenetriamine, hexamethylenediamine and p-phenylenediamine.
7. The lubricity inhibitor for drilling fluids according to claim 1, wherein the catalyst is an organometallic compound and the solvent is an organic solvent.
8. The lubrication inhibitor for drilling fluid according to claim 7, wherein the organometallic compound is one or more of organic tin, organic zinc and organic bismuth; the organic solvent is one or more of dimethyl carbonate, propylene glycol methyl ether acetate and xylene.
9. The method for preparing the lubrication inhibitor for the drilling fluid, which is disclosed by the claims 1 to 8, comprises the following steps of:
(1) adding a certain proportion of long-chain fatty acid and a solvent into a reaction kettle, stirring at a high speed, and heating;
(2) adding small molecular amino compound, and stirring at high speed for 20-30 min;
(3) adding catalyst, and stirring at high speed for 20-30 min;
(4) heating to 80-100 ℃, stirring, and reacting for 1-2 h;
(5) vacuumizing, continuously reducing pressure, stirring, and reacting for 2-3 h;
(6) cooling and discharging to obtain the product.
10. The method for preparing the flow pattern regulator for the oil-based drilling fluid according to claim 9, wherein the flow pattern regulator comprises the following components in percentage by weight: in the step (2), adding the small molecular amino compound at 50-65 ℃, and in the step (6), cooling to below 50 ℃ and discharging.
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