CN115975620A - Gas well foam scrubbing agent and preparation method and application thereof - Google Patents
Gas well foam scrubbing agent and preparation method and application thereof Download PDFInfo
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- CN115975620A CN115975620A CN202310053381.9A CN202310053381A CN115975620A CN 115975620 A CN115975620 A CN 115975620A CN 202310053381 A CN202310053381 A CN 202310053381A CN 115975620 A CN115975620 A CN 115975620A
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- 239000006260 foam Substances 0.000 title claims abstract description 111
- 238000005201 scrubbing Methods 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 129
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 78
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims abstract description 57
- -1 alkyl acyl propyl trimethyl ammonium chloride Chemical compound 0.000 claims abstract description 50
- 239000004094 surface-active agent Substances 0.000 claims abstract description 47
- 229960003237 betaine Drugs 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 150000001413 amino acids Chemical class 0.000 claims abstract description 23
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 21
- 239000011734 sodium Substances 0.000 claims abstract description 21
- 239000002343 natural gas well Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 8
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims abstract 5
- 238000007599 discharging Methods 0.000 claims description 28
- 239000000126 substance Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 229940045944 sodium lauroyl glutamate Drugs 0.000 claims description 7
- IWIUXJGIDSGWDN-UQKRIMTDSA-M sodium;(2s)-2-(dodecanoylamino)pentanedioate;hydron Chemical compound [Na+].CCCCCCCCCCCC(=O)N[C@H](C([O-])=O)CCC(O)=O IWIUXJGIDSGWDN-UQKRIMTDSA-M 0.000 claims description 7
- IKGKWKGYFJBGQJ-UHFFFAOYSA-M sodium;2-(dodecanoylamino)acetate Chemical compound [Na+].CCCCCCCCCCCC(=O)NCC([O-])=O IKGKWKGYFJBGQJ-UHFFFAOYSA-M 0.000 claims description 7
- MGUOTTIGDRKQKO-NTISSMGPSA-N C(CCCCCCCCCCC)(=O)N[C@@H](CCCCN)C(=O)O.[Na] Chemical compound C(CCCCCCCCCCC)(=O)N[C@@H](CCCCN)C(=O)O.[Na] MGUOTTIGDRKQKO-NTISSMGPSA-N 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 239000013051 drainage agent Substances 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 35
- 238000004519 manufacturing process Methods 0.000 abstract description 23
- 230000015556 catabolic process Effects 0.000 abstract description 5
- 238000006731 degradation reaction Methods 0.000 abstract description 5
- 238000003786 synthesis reaction Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 4
- 230000033558 biomineral tissue development Effects 0.000 abstract description 3
- 239000013043 chemical agent Substances 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 18
- 229940083542 sodium Drugs 0.000 description 16
- 238000005187 foaming Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 13
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 12
- 230000000087 stabilizing effect Effects 0.000 description 9
- HLZKNKRTKFSKGZ-UHFFFAOYSA-N tetradecan-1-ol Chemical compound CCCCCCCCCCCCCCO HLZKNKRTKFSKGZ-UHFFFAOYSA-N 0.000 description 8
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 7
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 125000002252 acyl group Chemical group 0.000 description 5
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 5
- HAXVIVNBOQIMTE-UHFFFAOYSA-L disodium;2-(carboxylatomethylamino)acetate Chemical compound [Na+].[Na+].[O-]C(=O)CNCC([O-])=O HAXVIVNBOQIMTE-UHFFFAOYSA-L 0.000 description 5
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- DZCAZXAJPZCSCU-UHFFFAOYSA-K sodium nitrilotriacetate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CC([O-])=O DZCAZXAJPZCSCU-UHFFFAOYSA-K 0.000 description 5
- NRWCNEBHECBWRJ-UHFFFAOYSA-M trimethyl(propyl)azanium;chloride Chemical compound [Cl-].CCC[N+](C)(C)C NRWCNEBHECBWRJ-UHFFFAOYSA-M 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 125000003368 amide group Chemical group 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- WUWHFEHKUQVYLF-UHFFFAOYSA-M sodium;2-aminoacetate Chemical compound [Na+].NCC([O-])=O WUWHFEHKUQVYLF-UHFFFAOYSA-M 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- MPNXSZJPSVBLHP-UHFFFAOYSA-N 2-chloro-n-phenylpyridine-3-carboxamide Chemical compound ClC1=NC=CC=C1C(=O)NC1=CC=CC=C1 MPNXSZJPSVBLHP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 229960000541 cetyl alcohol Drugs 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- QEALYLRSRQDCRA-UHFFFAOYSA-N myristamide Chemical compound CCCCCCCCCCCCCC(N)=O QEALYLRSRQDCRA-UHFFFAOYSA-N 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- HLERILKGMXJNBU-UHFFFAOYSA-N norvaline betaine Chemical compound CCCC(C([O-])=O)[N+](C)(C)C HLERILKGMXJNBU-UHFFFAOYSA-N 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 125000001453 quaternary ammonium group Chemical group 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 150000001450 anions Chemical group 0.000 description 1
- SRSXLGNVWSONIS-UHFFFAOYSA-M benzenesulfonate Chemical compound [O-]S(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-M 0.000 description 1
- 229940077388 benzenesulfonate Drugs 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
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- 230000014509 gene expression Effects 0.000 description 1
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- 229920002521 macromolecule Polymers 0.000 description 1
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- 229940043348 myristyl alcohol Drugs 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Abstract
The application discloses a gas well foam scrubbing agent and a preparation method and application thereof, and belongs to the technical field of gas well chemical agents. The gas well foam scrubbing agent comprises alkyl acyl propyl trimethyl ammonium chloride, an amino acid surfactant, a betaine surfactant, high-carbon alcohol, sodium amino acid and solvent water, wherein the viscoelasticity of a foam liquid film and the stability of foam can be obviously enhanced by compounding the components, and on one hand, the foam scrubbing agent can keep higher liquid carrying capacity under high temperature, high mineralization and high condensate oil and is suitable for drainage and gas production of a deep-exploitation natural gas well; on the other hand, the gas well foam scrubbing agent has the advantages of easily obtained raw materials, easy preparation, no need of complex organic synthesis and/or purification process, good degradation performance, low cost, environmental protection, easy degradation and easy popularization.
Description
Technical Field
The application belongs to the technical field of gas well chemical agents, and particularly relates to a gas well foam scrubbing agent and a preparation method and application thereof.
Background
Gas well liquid loading refers to the accumulation of liquids at the bottom of the well that cannot be carried over by the natural gas stream during the production of the gas well. In recent years, with the continuous development of gas fields, the problem of gas well liquid accumulation occurs in most of domestic gas wells, and the gas well liquid accumulation can generate bottom hole back pressure, so that the gas production rate is reduced, even gas is not produced, and the development and production of the gas fields are seriously influenced. Therefore, it is necessary to remove liquid accumulated at the bottom of the well to ensure the stable production and the yield increase of the gas well.
Foam drainage is to add foam drainage agent into gas well effusion to make gas-liquid two-phase produce effects such as foaming, dispersion, drag reduction and washing in vertical mixed flow, thereby realizing the purpose of drainage and gas production, and is common in the current measures of draining the shaft bottom effusion. However, as natural gas wells are produced, the salinity and condensate content of the bottom hole liquid increases significantly, so that the performance of the foam discharging agent is seriously reduced.
In order to perform foam drainage treatment on bottom hole accumulated liquid with high salinity and high condensate oil content, a plurality of high temperature resistant, oil resistant and salt resistant foam drainage agents have been developed in the field. For example, patent publication No. CN 110791273B shows a complex foam-exhausting agent composed of anionic surfactant, CO 2 /N 2 The foam stabilizer consists of a switch salt-tolerant response type tertiary amine, a polymer AM-NVP-AS, a foam stabilizer and ethanol, can realize drainage and gas production in a high-temperature, high-salinity and high-condensate gas well environment, and has the characteristics of good foam stability, long half-life period, strong liquid carrying capacity and the like; the patent with the publication number of CN 109681176B discloses an oil-resistant foam scrubbing agent composition, which comprises alkylamine polyether benzene sulfonate, long-chain polyether nitrogen-containing compounds and nanoparticles, can be applied to drainage and gas production of condensate-containing oil and gas wells, and has the performances of oil resistance, thermal stability, foaming performance, strong liquid carrying capacity and the like.
However, the existing high-temperature-resistant, oil-resistant and salt-resistant foam scrubbing agent generally contains components such as polymers, macromolecules or nanoparticles, and the like, and generally relates to a complex organic synthesis and/or purification process, and has a complex preparation process and high cost; meanwhile, part of the foam scrubbing agent components contain components such as sulfonate and the like, so that the environment friendliness is poor, and the popularization and the application are not facilitated.
Disclosure of Invention
The application aims to provide a gas well foam scrubbing agent, and a preparation method and application thereof, and aims to solve the technical problems that the existing high-temperature-resistant, oil-resistant and salt-resistant foam scrubbing agent is complex to synthesize, high in cost and difficult to degrade.
In order to achieve the purpose of the application, the technical scheme of the application is as follows:
the first aspect of the application provides a gas well foam discharging agent, which comprises water and the following components dissolved in the water: alkyl acyl propyl trimethyl ammonium chloride, amino acid surfactant, betaine surfactant, higher alcohol and sodium amino acid.
In a preferred implementation manner of the first aspect, the molar ratio of the alkyl acyl propyl trimethyl ammonium chloride, the amino acid surfactant, the betaine surfactant, the higher alcohol and the sodium amino acid is (2-4): (1-3): (3-5): (1-10).
In a preferred implementation of the first aspect, the molar ratio of the alkyl acyl propyl trimethyl ammonium chloride, the amino acid surfactant, the betaine surfactant, the higher alcohol and the sodium amino acid is (2-4): (1-3): (4-5): (4-10).
In a preferred implementation of the first aspect, the alkyl acyl propyl trimethyl ammonium chloride has a chemical structure represented by the following formula (1):
wherein R is 1 Is C 12 -C 18 Any one of (a) or (b).
In a preferred implementation of the first aspect, the amino acid surfactant is any one of sodium lauroyl glutamate, sodium lauroyl glycinate, and sodium lauroyl lysine.
In a preferred implementation of the first aspect, the betaine surfactant has a chemical structure represented by the following formula (2):
wherein R is 2 Is C 12 -C 18 Any one of (a) or (b).
In a preferred implementation of the first aspect, the higher alcohol has a chemical structure represented by the following formula (3);
R 3 -OH
(3)
wherein R is 3 Is C 10 -C 16 Any one of (a) or (b).
In a preferred implementation of the first aspect, the sodium amino acid has a chemical structure represented by the following formula (4):
wherein R is 4 And R 5 Each independently selected from-H or-CH 2 COONa。
The second aspect of the embodiments of the present application also provides a preparation method of the gas well foam scrubbing agent of the first aspect, which includes the following steps:
and dissolving the component raw materials contained in the gas well foam scrubbing agent in water and carrying out ultrasonic treatment to obtain the gas well foam scrubbing agent.
The third aspect of the embodiment of the application also provides an application of the gas well foam drainage agent of the first aspect in drainage and gas production treatment of a natural gas well.
Compared with the prior art, the advantages or beneficial effects of the embodiment of the application at least comprise:
the gas well foam scrubbing agent provided by the first aspect of the application is prepared by compounding alkyl acyl propyl trimethyl ammonium chloride, amino acid surfactant, betaine surfactant, higher alcohol and sodium amino acid, wherein quaternary ammonium cation groups contained in the alkyl acyl propyl trimethyl ammonium chloride can be used for preparing amino acid surfaceThe active agent, the betaine surfactant and the carboxyl anion group of the sodium amino acid form an electrostatic attraction effect; meanwhile, the amide group contained in the alkyl acyl propyl trimethyl ammonium chloride can form a hydrogen bond with a hydroxyl group of an amino acid surfactant, an amide group of a betaine surfactant, a hydroxyl group of a higher alcohol and the like, so that based on the electrostatic attraction effect and the hydrogen bond effect, molecules of the alkyl acyl propyl trimethyl ammonium chloride, the amino acid surfactant, the betaine surfactant, the higher alcohol and the sodium amino acid are promoted to be mutually crosslinked, and a compact and stable interface adsorption film is formed on a gas-liquid interface, so that the viscoelasticity of a foam liquid film and the stability of foam are obviously enhanced. In addition, the sodium amino acid has a small molecular structure and a characteristic of being rich in carboxyl, and contributes to the combination with Ca 2+ 、Mg 2+ The high-valence salt ions form a complex, so that the high-valence salt ions have a high-efficiency shielding effect, and the adaptability of the gas well foam scrubbing agent under the high-salinity condition can be improved.
Based on the advantages, on one hand, the gas well foam discharging agent can keep higher liquid carrying capacity under high temperature, high salinity and high condensate oil, is suitable for discharging and gas production of a gas well with single problems such as high temperature, high salinity and high condensate oil, and is also suitable for discharging and gas production of a gas well with complex problems such as high temperature, high salinity and high condensate oil, and meets the requirement of discharging and gas production of a deep exploitation natural gas well; on the other hand, the gas well foam scrubbing agent has the advantages of simple synthesis of component raw materials, good degradation performance, no need of complex organic synthesis and/or purification process, low cost, environmental protection, easy degradation and easy popularization.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some of the embodiments described in the present application, and that other drawings can be derived from these drawings by a person skilled in the art without inventive effort.
Fig. 1 is a microscopic image of foam formation of gas well foam stripper solution samples YG1 at various decay times provided in the examples of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the following description of the present embodiment, the term "and/or" is used to describe an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B, and may indicate: a alone, B alone and both A and B. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the following description of the present embodiment, the term "at least one" means one or more, and "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (one) of a, b, or c," or "at least one (one) of a, b, and c," may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, and c may be single or plural, respectively.
It should be understood by those skilled in the art that, in the following description of the embodiments of the present application, the sequence of the serial numbers does not mean the sequence of the execution, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In a first aspect, the embodiment of the application provides a gas well foam scrubbing agent. The gas well foam scrubbing agent provided by the embodiment of the application comprises water and the following components dissolved in the water: alkyl acyl propyl trimethyl ammonium chloride, amino acid surfactant, betaine surfactant, higher alcohol and sodium amino acid.
In view of the above, the gas well foam discharging agent of the embodiment of the present application is formed by dissolving alkyl acyl propyl trimethyl ammonium chloride, amino acid surfactant, betaine surfactant, higher alcohol and sodium amino acid in water to form a composite surfactant component, so that they can realize synergistic effect through crosslinking. Specifically, the method comprises the following steps:
in the first aspect, the alkyl acyl propyl trimethyl ammonium chloride contains quaternary ammonium cationic groups which can form an electrostatic attraction effect with amino acid surfactants, betaine surfactants and carboxyl anionic groups of sodium amino acid; in the second aspect, the amide group contained in the alkylamidopropyltrimethylammonium chloride can form a hydrogen bond with a hydroxyl group of the amino acid surfactant, an amide group of the betaine surfactant, a hydroxyl group of the higher alcohol, or the like. Based on the electrostatic attraction effect and the hydrogen bond effect, on one hand, molecules of alkyl acyl propyl trimethyl ammonium chloride, amino acid surfactant, betaine surfactant, higher alcohol and sodium amino acid can be promoted to realize mutual crosslinking, and on the other hand, a compact and stable interface adsorption film can be formed on a gas-liquid interface, so that the viscoelasticity of a foam liquid film and the stability of foam are obviously enhanced.
In the third aspect, the sodium amino acid has a small molecular structure and a carboxyl-rich property, and contributes to the combination with Ca 2+ 、Mg 2+ And the high-valence salt ions form a complex, so that the high-valence salt ions are effectively shielded, and the adaptability of the gas well foam scrubbing agent under the high-salinity condition is improved. .
By integrating the above, the high liquid carrying capacity can be kept under high temperature, high salinity and high condensate oil, the high-temperature-resistant high-salinity high-condensate-oil drainage gas recovery system is suitable for drainage gas recovery of a gas well with single problems such as high temperature, high salinity and high condensate oil, and is also suitable for drainage gas recovery of a gas well with complex problems such as high temperature, high salinity and high condensate oil, and drainage gas recovery of a deep-mining natural gas well is met; on the other hand, the gas well foam scrubbing agent has the advantages of easily obtained raw materials, easy preparation, no need of complex organic synthesis and/or purification process, low cost, environmental protection, easy degradation and easy popularization.
In the examples of the present application, the molar ratio of the alkyl acyl propyl trimethyl ammonium chloride, the amino acid surfactant, the betaine surfactant, the higher alcohol and the sodium amino acid is preferably (2-4): 1-3): 3-5): 1-10.
In the examples of the present application, the molar ratio of the alkyl acyl propyl trimethyl ammonium chloride, the amino acid surfactant, the betaine surfactant, the higher alcohol and the sodium amino acid is more preferably (2-4): 1-3): 4-5): 4-10.
In the examples of the present application, the alkyl acyl propyl trimethyl ammonium chloride has a chemical structure represented by the following formula (1):
wherein R is 1 Preferably C 12 -C 18 Any of (a) alkyl groups. In particular, according to R 1 Said alkyl acyl propyl trimethyl ammonium chloride is selected from any one of lauroyl propyl trimethyl ammonium chloride, tetradecyl acyl propyl trimethyl ammonium chloride and hexadecyl acyl propyl trimethyl ammonium chloride.
In the present embodiment, the amino acid surfactant is preferably any one of sodium lauroyl glutamate, sodium lauroyl glycinate, and sodium lauroyl lysine. On one hand, the amino acid surfactants contain carboxyl, amide and other groups, and can form electrostatic attraction effect and hydrogen bond effect with other components such as alkyl acyl propyl trimethyl ammonium chloride and the like, so that synergistic effect can be realized through the electrostatic attraction effect and the cross-linking effect of the hydrogen bond. On the other hand, the amino acid surfactants are good in environmental protection property and beneficial to popularization and application.
In the examples of the present application, the betaine surfactant has a chemical structure represented by the following formula (2):
wherein R is 2 Is C 12 -C 18 Any one of (a) or (b). In particular, according to R 2 The betaine surfactant is selected from any one of laurylamidopropyl betaine, myristylamidopropyl betaine and cetylamidopropyl betaine.
In the embodiments of the present application, the higher alcohol has a chemical structure represented by the following formula (3);
R 3 -OH
(3)
wherein R is 3 Is C 10 -C 16 Any of (a) alkyl groups. In particular, according to R 3 Is different from the alkyl chain of (a), and the higher alcohol is selected from any one of dodecanol, tetradecanol and hexadecanol.
In the examples of the present application, the sodium amino acid has a chemical structure represented by the following formula (4):
wherein R is 4 And R 5 Each independently selected from-H or-CH 2 COONa. In particular, according to R 4 And R 5 Is selected from any one of sodium glycine, sodium iminodiacetate, and trisodium nitrilotriacetate.
In a second aspect, an embodiment of the present application further provides a preparation method of the gas well foam scrubbing agent, which specifically includes the following steps:
and (3) dissolving the component raw materials contained in the gas well foam discharging agent in water at room temperature, and performing ultrasonic treatment to obtain the gas well foam discharging agent.
The preparation method provided by the second aspect of the embodiment of the application can enable the raw materials of each component to be fully mixed and dissolved in water, so that the composite surfactant with excellent foaming performance is formed through crosslinking, the raw materials of each component can play a synergistic effect, and the gas well foam displacement agent can keep higher liquid carrying capacity under high temperature, high salinity and high condensate oil, so that the preparation method is suitable for drainage gas production of a gas well with single problems such as high temperature, high salinity and high condensate oil, and is also suitable for drainage gas production of a gas well with complex problems such as high temperature, high salinity and high condensate oil, and meets drainage gas production of a deep-exploitation natural gas well.
When the gas well foam discharging agent provided by the third aspect of the embodiment of the application is used for conducting drainage and gas production treatment on a natural gas well, the gas well foam discharging agent has the advantages of being high in generated foam stability, high-temperature resistant, salt-resistant, good in oil resistance, ideal in drainage effect and the like. Therefore, the gas well foam drainage agent can realize efficient drainage and gas production of a natural gas well after being used for drainage and gas production treatment of the natural gas well, is suitable for drainage and gas production of a gas well with single problems such as high temperature, high salinity, high condensate and the like, is also suitable for drainage and gas production of a gas well with complex problems such as high temperature, high salinity, high condensate and the like, and meets the requirement of drainage and gas production of a deep exploitation natural gas well.
The technical solution of the present invention will be further explained with reference to specific examples.
Example 1
The embodiment provides a preparation method of a gas well foam scrubbing agent, which specifically comprises the following steps:
lauroyl propyl trimethyl ammonium chloride, sodium lauroyl glutamate, dodecylamidopropyl betaine, dodecanol and trisodium nitrilotriacetate were dissolved in 200mL of clear water at a molar ratio of 2.9 mm.
Example 2
The embodiment provides a preparation method of a gas well foam scrubbing agent, which specifically comprises the following steps:
lauroyl propyl trimethyl ammonium chloride, sodium lauroyl glycinate, myristyl amidopropyl betaine, myristyl alcohol and sodium iminodiacetate were dissolved in 200mL of clear water at a molar ratio of 2mm.
Example 3
The embodiment provides a preparation method of a gas well foam scrubbing agent, which specifically comprises the following steps:
lauroyl propyl trimethyl ammonium chloride, sodium lauroyl lysine, hexadecylamidopropyl betaine, hexadecanol, and trisodium nitrilotriacetate were dissolved in 200mL of clear water at room temperature at a molar ratio of 3mm, 2mm, 4.5mm, 10 mm.
Example 4
The embodiment provides a preparation method of a gas well foam scrubbing agent, which specifically comprises the following steps:
tetradecanoylpropyltrimethylammonium chloride, sodium lauroyl glutamate, dodecylamidopropylbetaine, cetyl alcohol and sodium glycine were dissolved in 200mL of clear water at a molar ratio of 2.9 mm.
Example 5
The embodiment provides a preparation method of a gas well foam scrubbing agent, which specifically comprises the following steps:
cetyl acyl propyl trimethyl ammonium chloride, sodium lauroyl glycinate, cetyl amidopropyl betaine, tetradecanol and trisodium nitrilotriacetate were dissolved in 200mL of clear water at room temperature in a molar ratio of 3.5 mm.
Example 6
The embodiment provides a preparation method of a gas well foam scrubbing agent, which specifically comprises the following steps:
tetradecyl acylpropyltrimethylammonium chloride, sodium lauroyl lysine, tetradecyl amidopropylbetaine, dodecanol, and sodium iminodiacetate were dissolved in 200mL of clear water at a molar ratio of 4 mm.
Example 7
The embodiment provides a preparation method of a gas well foam scrubbing agent, which specifically comprises the following steps:
cetyl amidopropyl trimethyl ammonium chloride, sodium lauroyl glycinate, dodecylamidopropyl betaine, dodecanol and sodium glycine were dissolved in 200mL of clear water at room temperature in a molar ratio of 2.9mm.
Example 8
The embodiment provides a preparation method of a gas well foam scrubbing agent, which specifically comprises the following steps:
tetradecanoylpropyltrimethylammonium chloride, sodium lauroyl glycinate, tetradecylamidopropylbetaine, tetradecanol and sodium glycine were dissolved in 200mL of clear water at room temperature at a molar ratio of 3.5 mm.
Example 9
The embodiment provides a preparation method of a gas well foam scrubbing agent, which specifically comprises the following steps:
hexadecyl acyl propyl trimethyl ammonium chloride, sodium lauroyl glutamate, tetradecyl amide propyl betaine, cetyl alcohol and sodium iminodiacetate were dissolved in 200mL of clear water at room temperature in a molar ratio of 3.5 mm.
Example 10
The embodiment provides a preparation method of a gas well foam scrubbing agent, which specifically comprises the following steps:
cetyl amidopropyl trimethyl ammonium chloride, sodium lauroyl glutamate, cetyl amidopropyl betaine, dodecanol, and trisodium nitrilotriacetate were dissolved in 200mL of clear water at a molar ratio of 4 mm.
In order to verify the actual performance of the gas well foam discharging agents YG1-YG10 prepared in the embodiment of the application, the application tests the foaming performance, foam stabilizing performance and liquid carrying performance of the gas well foam discharging agents YG1-YG10, and specifically includes:
1. the foaming performance and foam stabilizing performance of YG1-YG10 of the gas well foam discharging agent are tested according to SY/T5350-2009 evaluation procedure of foaming agent for drilling fluid. The specific test process is as follows:
the foaming volume and half-life period are measured by adopting a stirring method, 100mL of prepared gas well foam discharging agent is taken, stirred in a high-speed stirrer for 3min at the rotating speed of 7000 r/min, and the foam is poured into a measuring cylinder to test the maximum foaming volume and half-life period (time for precipitating 50mL of solution).
2. The liquid carrying performance of YG1-YG10 of gas well foam discharging agent was tested according to SY/T7494-2020 & lt evaluation method for foaming agent experiment for oil and gas field. The specific test process is as follows: and (3) adopting a foam liquid carrying evaluation device, dispersing nitrogen into micro bubbles through a glass sand core, introducing the micro bubbles into the glass column, controlling the gas flow rate at 400mL/min, and carrying the liquid out of the column by the generated foam. The amount of liquid carried out with the foam was measured for various concentrations of the foam remover solution when nitrogen was passed through for 9 min.
And (3) testing conditions are as follows: clear water (degree of mineralization =0 mg/L), no condensate and room temperature (25 ℃);
the test results are described in table 1 below. Table 1 shows the results of the foaming, foam stabilizing and liquid carrying performance tests of YG1-YG10 of the gas well foam discharging agent in the examples of the present application.
TABLE 1 foaming, foam stabilizing and liquid carrying Properties of gas well foam discharging agent YG1-YG10 at clear water, room temperature
| Gas well foam scrubbing agent | Bubbling volume/mL | Half life/min | Liquid carrying rate/%) |
| Gas well foam scrubbing agent YG1 | 455 | 25 | 28.8 |
| Gas well foam scrubbing agent YG2 | 430 | 23 | 30.2 |
| Gas well foam scrubbing agent YG3 | 450 | 30 | 33.5 |
| Gas well foam scrubbing agent YG4 | 445 | 28 | 29.5 |
| Gas well foam scrubbing agent YG5 | 435 | 32 | 33.5 |
| Gas well foam scrubbing agent YG6 | 465 | 33 | 37.3 |
| Gas well foam scrubbing agent YG7 | 440 | 25 | 28.9 |
| Gas well foam scrubbing agent YG8 | 450 | 28 | 30.2 |
| Gas well foam scrubbing agent YG9 | 445 | 35 | 32.5 |
| Gas well foam scrubbing agent YG10 | 455 | 38 | 33.2 |
As can be seen from table 1, the gas well foam scrubbing agent prepared in the examples of the present application has excellent foaming, foam stabilizing and liquid carrying capacities in a clean water system. Among them, the gas well foam drainage agent YG6 has relatively best foaming performance and liquid carrying performance, which shows that the composite surfactant formed by dissolving tetradecyl acyl propyl trimethyl ammonium chloride, sodium lauroyl lysine, tetradecyl amide propyl betaine, dodecanol and sodium iminodiacetate in water according to the molar ratio of 4 mM.
The foaming, foam stabilizing and liquid carrying performances of the gas well foam discharging agent YG1 prepared in the embodiment of the application under the conditions of high salinity, condensate oil and high temperature are also tested. The test conditions are shown in table 2 below.
TABLE 2 test conditions
| Item | Degree of mineralization of clear water/mg/L | Clear water condensate content (v/v)/%) | Test temperature/. Degree.C |
| Test Condition 1 | 330000 | 0 | 25 |
| Test conditions 2 | 0 | 50 | 25 |
| Test Condition 3 | 0 | 0 | 90 |
The test results are described in table 3 below. Wherein, table 3 shows the foaming, foam stabilizing and liquid carrying properties of the gas well foam discharging agent YG1 under the test conditions described in table 2.
TABLE 3 test results for hypersalinity, high condensate and high temperature conditions
| Gas well foam scrubbing agent | Bubbling volume/mL | Half life/min | Liquid carrying rate/%) |
| Test 1 | 450 | 20 | 33.8 |
| Test 2 | 420 | 23 | 32.0 |
| Test 3 | / | / | 32.5 |
As can be seen from Table 3, YG1, the gas well foam discharging agent has good foaming, foam stabilizing and liquid carrying performances under the conditions of high salinity, high condensate content and high temperature. The gas well foam discharging agent prepared by the embodiment of the application is suitable for water drainage and gas production of gas wells with problems of high temperature, high salinity, high condensate oil and the like, and meets the water drainage and gas production of deep-exploitation natural gas wells.
Fig. 1 shows microscopic images (room temperature, scale bar 1.0 mm) of foam formation of gas well foam remover solution samples YG1 at different decay times.
According to fig. 1, after the foam generated by the gas well foam discharging agent YG1 decays for 45min, the liquid film is still thick, which indicates that the gas well foam discharging agent YG1 has a high foam stabilizing property, indicating that the gas well foam discharging agent YG1 has a good liquid holding and carrying property.
The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments can be mutually referred to, and each embodiment focuses on the difference from the other embodiments.
The above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.
Claims (10)
1. The gas well foam scrubbing agent is characterized by comprising water and the following components dissolved in the water: alkyl acyl propyl trimethyl ammonium chloride, amino acid surfactant, betaine surfactant, higher alcohol and sodium amino acid.
2. The gas well foam-discharging agent as recited in claim 1, characterized in that the molar ratio of the alkyl acyl propyl trimethyl ammonium chloride, the amino acid surfactant, the betaine surfactant, the higher alcohol and the sodium amino acid is (2-4): (1-3): (3-5): (1-10).
3. The gas well foam-drain agent as claimed in claim 2, characterized in that the molar ratio of the alkyl acyl propyl trimethyl ammonium chloride, the amino acid surfactant, the betaine surfactant, the higher alcohol and the sodium amino acid is (2-4): 1-3): 4-5): 4-10.
4. The gas well foam-discharging agent as recited in any one of claims 1-3, characterized in that the alkyl acyl propyl trimethyl ammonium chloride has a chemical structure represented by the following formula (1):
wherein R is 1 Is C 12 -C 18 Any of (a) alkyl groups.
5. The gas well foam-bleed agent as claimed in any one of claims 1 to 3, wherein the amino acid surfactant is any one of sodium lauroyl glutamate, sodium lauroyl glycinate and sodium lauroyl lysine.
6. The gas well foam stripper as set forth in any of claims 1-3, wherein the betaine surfactant has a chemical structure represented by the following formula (2):
wherein R is 2 Is C 12 -C 18 Any of (a) alkyl groups.
7. The gas well foam stripper as set forth in any one of claims 1-3, wherein said higher alcohol has a chemical structure represented by the following formula (3);
R 3 -OH
(3)
wherein R is 3 Is C 10 -C 16 Any of (a) alkyl groups.
8. The gas well foam-discharging agent as set forth in any one of claims 1 to 3, characterized in that the sodium amino acid has a chemical structure represented by the following formula (4):
wherein R is 4 And R 5 Each independently selected from-H or-CH 2 COONa。
9. A method of preparing a gas well foam-drainage agent as claimed in any one of claims 1 to 8, comprising the steps of:
and dissolving the component raw materials contained in the gas well foam scrubbing agent in water and carrying out ultrasonic treatment to obtain the gas well foam scrubbing agent.
10. Use of a gas well foam drainage agent according to any one of claims 1 to 8 in drainage gas recovery treatment of a natural gas well.
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Cited By (1)
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