CN115975620B - Gas well foam discharging agent and preparation method and application thereof - Google Patents
Gas well foam discharging agent and preparation method and application thereof Download PDFInfo
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- CN115975620B CN115975620B CN202310053381.9A CN202310053381A CN115975620B CN 115975620 B CN115975620 B CN 115975620B CN 202310053381 A CN202310053381 A CN 202310053381A CN 115975620 B CN115975620 B CN 115975620B
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- amino acid
- foam discharging
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- 239000006260 foam Substances 0.000 title claims abstract description 121
- 238000007599 discharging Methods 0.000 title claims abstract description 87
- 238000002360 preparation method Methods 0.000 title abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 135
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 90
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims abstract description 63
- -1 alkyl acyl propyl trimethyl ammonium chloride Chemical compound 0.000 claims abstract description 60
- 239000004094 surface-active agent Substances 0.000 claims abstract description 48
- 229960003237 betaine Drugs 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000011734 sodium Substances 0.000 claims abstract description 26
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 26
- 150000001413 amino acids Chemical class 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002343 natural gas well Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims abstract 5
- 125000000217 alkyl group Chemical group 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 12
- 238000009210 therapy by ultrasound Methods 0.000 claims description 10
- 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
- 150000001298 alcohols Chemical class 0.000 claims description 5
- 239000013051 drainage agent Substances 0.000 claims description 5
- 238000011282 treatment Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 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 claims 1
- 238000006073 displacement reaction Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 28
- 230000033558 biomineral tissue development Effects 0.000 abstract description 21
- 230000015556 catabolic process Effects 0.000 abstract description 7
- 238000006731 degradation reaction Methods 0.000 abstract description 7
- 238000005065 mining Methods 0.000 abstract description 6
- 238000003786 synthesis reaction Methods 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract description 4
- 239000013043 chemical agent Substances 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 abstract 1
- 229940083542 sodium Drugs 0.000 description 21
- 238000012360 testing method Methods 0.000 description 18
- 238000005187 foaming Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 14
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 12
- HLZKNKRTKFSKGZ-UHFFFAOYSA-N tetradecan-1-ol Chemical compound CCCCCCCCCCCCCCO HLZKNKRTKFSKGZ-UHFFFAOYSA-N 0.000 description 8
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 7
- 230000000087 stabilizing effect Effects 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 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
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- UGDGCQDPDCGIJP-UHFFFAOYSA-M CCCCCCCCCCCCCCCCC[N+](C)(C)CCC.[Cl-] Chemical compound CCCCCCCCCCCCCCCCC[N+](C)(C)CCC.[Cl-] UGDGCQDPDCGIJP-UHFFFAOYSA-M 0.000 description 4
- 125000003368 amide group Chemical group 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- ILRSCQWREDREME-UHFFFAOYSA-N dodecanamide Chemical compound CCCCCCCCCCCC(N)=O ILRSCQWREDREME-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 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 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
- 206010030113 Oedema Diseases 0.000 description 3
- 229960000541 cetyl alcohol Drugs 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 125000002252 acyl group Chemical group 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 125000002091 cationic group Chemical group 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 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
- 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
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- NRWCNEBHECBWRJ-UHFFFAOYSA-M trimethyl(propyl)azanium;chloride Chemical compound [Cl-].CCC[N+](C)(C)C NRWCNEBHECBWRJ-UHFFFAOYSA-M 0.000 description 2
- 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 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 239000003945 anionic surfactant Substances 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
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 125000003438 dodecyl group Chemical group [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])* 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 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
Landscapes
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The application discloses a gas well foam discharging agent, a preparation method and application thereof, and belongs to the technical field of gas well chemical agents. The gas well foam discharging agent comprises alkyl acyl propyl trimethyl ammonium chloride, an amino acid surfactant, a betaine surfactant, high-carbon alcohol, sodium amino acid and solvent water, and the components are compounded to remarkably enhance the viscoelasticity of a foam liquid film and the stability of foam, so that the gas well foam discharging agent can keep higher liquid carrying capacity under high temperature, high mineralization degree and high condensate oil, and is suitable for drainage and gas production of deep mining natural gas wells; on the other hand, the gas well foam discharging agent has the advantages of easily obtained raw materials of components, easy preparation, no need of complex organic synthesis and/or purification process, good degradation performance, low cost, environment friendliness, 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 discharging agent, a preparation method and application thereof.
Background
Gas well dropsy refers to the phenomenon of accumulation at the bottom of a well during production of a gas well, where liquids are not carried over by natural gas streams. In recent years, with the continuous development of gas fields, most gas wells in China have the problem of gas well dropsy, and the gas well dropsy can generate bottom hole back pressure, so that the gas production is reduced or even no gas is produced, and the development and production of the gas fields are seriously affected. Therefore, the bottom hole effusion is required to be removed 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 generate effects of foaming, dispersing, drag reduction, washing and the like in vertical mixed flow of gas and liquid phases, thereby realizing the purpose of drainage and gas production and being more common in the prior measures of removing the effusion at the bottom of the well. However, as natural gas wells are produced, the mineralization and condensate content of the bottom hole fluid increases significantly, causing serious degradation of the performance of the foam discharging agent.
For foam drainage of high salinity and high condensate content bottomhole fluid, a number of high temperature, oil and salt resistant foam drainage agents have been developed in the art. For example, the patent with publication number CN 110791273B shows a composite foam discharging agent which consists of an anionic surfactant, a CO 2/N2 switch salt-tolerant response tertiary amine, a polymer AM-NVP-AS, a foam stabilizer and ethanol, can realize water and gas discharge in a high-temperature, high-mineralization and high-condensate gas well environment, and has the characteristics of good foam stability, long half-life, strong liquid carrying capacity and the like; the patent with publication number CN 109681176B discloses an oil-resistant foam discharging agent composition, which comprises alkylamine polyether benzene sulfonate, long-chain polyether nitrogen-containing compound and nano particles, can be applied to drainage and gas production of condensate gas wells, and has the performances of oil resistance, heat stability, foaming performance, strong liquid carrying capacity and the like.
However, the existing high-temperature-resistant, oil-resistant and salt-resistant foam discharging agent generally contains components such as polymers, macromolecules or nano particles, and the like, generally relates to complex organic synthesis and/or purification processes, and has complex preparation process and high cost; meanwhile, part of foam discharging agent components contain sulfonate and other components, so that the foam discharging agent is poor in environmental protection and is not beneficial to popularization and application.
Disclosure of Invention
The application aims to provide a gas well foam discharging agent, a preparation method and application thereof, and aims to solve the technical problems of complex synthesis, high cost and difficult degradation of the existing high-temperature-resistant, oil-resistant and salt-resistant foam discharging agent.
In order to achieve the above application object, the technical scheme of the present application is as follows:
in a first aspect the present application provides a gas well foam breaker comprising water and the following components dissolved in said water: alkyl acyl propyl trimethyl ammonium chloride, amino acid surfactant, betaine surfactant, higher alcohols and sodium amino acid.
In a preferred implementation of the first aspect, the molar ratio of the alkylacylpropyltrimethylammonium 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 alkylacylpropyltrimethylammonium 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 alkylacylpropyl trimethyl ammonium chloride has a chemical structure represented by the following formula (1):
Wherein R 1 is any one of alkyl groups of C 12-C18.
In a preferred implementation of the first aspect, the amino acid surfactant is any one of sodium lauroyl glutamate, sodium lauroyl glycinate, 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 2 is any one of alkyl groups of C 12-C18.
In a preferred implementation of the first aspect, the higher alcohol has a chemical structure represented by the following formula (3);
R3-OH
(3)
Wherein R 3 is any one of alkyl groups of C 10-C16.
In a preferred implementation of the first aspect, the sodium amino acid has a chemical structure represented by the following formula (4):
Wherein R 4 and R 5 are each independently selected from-H or-CH 2 COONa.
A second aspect of the embodiment of the present application further provides a method for preparing the gas well foam discharging agent according to the first aspect, which includes the following steps:
and dissolving the component raw materials contained in the gas well foam discharging agent in water and performing ultrasonic treatment to obtain the gas well foam discharging agent.
A third aspect of embodiments of the present application also provides the use of the gas well foam drainage agent of the first aspect in drainage and production treatments of natural gas wells.
Compared with the prior art, the embodiment of the application has the advantages or beneficial effects that at least the advantages or beneficial effects comprise:
The gas well foam discharging agent provided by the first aspect of the application is prepared by compounding alkyl acyl propyl trimethyl ammonium chloride, an amino acid surfactant, a betaine surfactant, higher alcohols and sodium amino acid, wherein quaternary ammonium cationic groups contained in the alkyl acyl propyl trimethyl ammonium chloride can form an electrostatic attraction effect by the amino acid surfactant, the betaine surfactant and carboxyl anionic groups of the sodium amino acid; meanwhile, the amide group contained in the alkyl acyl propyl trimethyl ammonium chloride can form a hydrogen bond with the hydroxyl group of the amino acid surfactant, the amide group of the betaine surfactant, the hydroxyl group of the higher alcohol and the like, so that the mutual crosslinking between molecules of the alkyl acyl propyl trimethyl ammonium chloride, the amino acid surfactant, the betaine surfactant, the higher alcohol and the sodium amino acid is realized based on the electrostatic attraction effect and the hydrogen bond effect, 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 the foam are obviously enhanced. In addition, the sodium amino acid has a small molecular structure and a characteristic of being rich in carboxyl, and is favorable for forming a complex with high-valence salt ions such as Ca 2+、Mg2+, so that the sodium amino acid has a high-efficiency shielding effect on the high-valence salt ions, and the sodium amino acid is favorable for improving the adaptability of the gas well foam discharging agent under the condition of high mineralization.
Based on the advantages, the gas well foam drainage agent in the first aspect can keep higher liquid carrying capacity at high temperature, high mineralization degree and high condensate oil, is suitable for drainage and gas production of gas wells with single problems such as high temperature, high mineralization degree and high condensate oil, is also suitable for drainage and gas production of gas wells with complex problems such as high temperature, high mineralization degree and high condensate oil, and meets the drainage and gas production requirements of deep mining natural gas wells; on the other hand, the gas well foam discharging 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 that are required to be 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 embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a microscopic view of foam formation of a sample YG1 of a gas well foaming agent solution at various decay times provided by an embodiment 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 accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the following description of the present embodiment, the term "and/or" is used to describe an association relationship of association objects, which means that three relationships may exist, for example, a and/or B may mean: a alone, B alone and both a and B. Wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.
In the following description of the present embodiments, the term "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, "at least one (individual) of a, b, or c," or "at least one (individual) 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, c may be single or multiple, respectively.
It should be understood by those skilled in the art that, in the following description of the present embodiment, the sequence number does not mean that the execution sequence is sequential, and some or all of the steps may be executed in parallel or sequentially, and the execution sequence of each process should be determined by its functions and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in 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, embodiments of the present application provide a gas well foam discharging agent. The gas well foam discharging 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 alcohols and sodium amino acid.
In view of this, the gas well foam discharging agent of the embodiment of the application forms a composite surfactant component by dissolving alkyl acyl propyl trimethyl ammonium chloride, an amino acid surfactant, a betaine surfactant, higher alcohols and sodium amino acid in water, so that the synergistic effect of the components can be realized by crosslinking. Specifically:
In a first aspect, the alkyl acyl propyl trimethyl ammonium chloride contains quaternary ammonium cationic groups capable of forming an electrostatic attraction effect with the carboxyl anionic groups of the amino acid surfactant, betaine surfactant and sodium amino acid; in the second aspect, the alkyl acyl propyl trimethyl ammonium chloride contains an amide group capable of forming 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, or the like. Based on the electrostatic attraction effect and the hydrogen bonding effect, on one hand, the molecules of alkyl acyl propyl trimethyl ammonium chloride, amino acid surfactant, betaine surfactant, high carbon alcohol and sodium amino acid can be mutually crosslinked, 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 characteristic of being rich in carboxyl, and is favorable for forming a complex with high-valence salt ions such as Ca 2+、Mg2+, so that the sodium amino acid has a high-efficiency shielding effect on the high-valence salt ions, and the sodium amino acid is favorable for improving the adaptability of the gas well foam discharging agent under the condition of high mineralization. .
In summary, the high liquid carrying capacity can be maintained at high temperature, high mineralization and high condensate oil, so that the method is suitable for drainage and gas production of a gas well with single problems such as high temperature, high mineralization and high condensate oil, and is also suitable for drainage and gas production of a gas well with complex problems such as high temperature, high mineralization and high condensate oil, and meets the drainage and gas production requirements of deep mining of a natural gas well; on the other hand, the gas well foam discharging agent has the advantages of easily obtained raw materials of components, easy preparation, no need of complex organic synthesis and/or purification process, low cost, environmental protection, easy degradation and easy popularization.
In the embodiment of the 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 embodiment of the 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 embodiment of the application, the alkyl acyl propyl trimethyl ammonium chloride has a chemical structure shown in the following formula (1):
Wherein R 1 is preferably any of the alkyl groups of C 12-C18. Specifically, the 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 according to the difference of the alkyl chain of R 1.
In the embodiment of the application, 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, so that the synergistic effect can be realized through the electrostatic attraction effect and the crosslinking effect of the hydrogen bond. On the other hand, the amino acid surfactants have better environmental protection property and are beneficial to popularization and application.
In an embodiment of the present application, the betaine surfactant has a chemical structure represented by the following formula (2):
Wherein R 2 is any one of alkyl groups of C 12-C18. Specifically, the betaine surfactant is selected from any one of dodecylamidopropyl betaine, tetradecylamidopropyl betaine, and hexadecylamidopropyl betaine according to the difference in alkyl chain of R 2.
In the embodiment of the application, the higher alcohol has a chemical structure shown in the following formula (3);
R3-OH
(3)
Wherein R 3 is any one of alkyl groups of C 10-C16. Specifically, the higher alcohol is selected from any one of dodecanol, tetradecanol and hexadecanol according to the difference of alkyl chains of R 3.
In the embodiment of the application, the sodium amino acid has a chemical structure shown in the following formula (4):
Wherein R 4 and R 5 are each independently selected from-H or-CH 2 COONa. Specifically, according to the same or different of R 4 and R 5, the sodium amino acid is selected from any one of sodium amino acetate, sodium iminodiacetate, and trisodium nitrilotriacetate.
In a second aspect, the embodiment of the application also provides a preparation method of the gas well foam discharging agent, which specifically comprises 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.
According to the preparation method provided by the embodiment of the application, the raw materials of all components can be fully mixed and dissolved in water, so that the composite surfactant with excellent foam performance is formed through crosslinking, the raw materials of all components can play a synergistic role, the gas well foam discharging agent can keep higher liquid carrying capacity at high temperature, high mineralization degree and high condensate oil, and the preparation method is suitable for water and gas discharge of gas wells with single problems such as high temperature/high mineralization degree/high condensate oil and the like, is also suitable for water and gas discharge of gas wells with complex problems such as high temperature, high mineralization degree and high condensate oil and the like, and meets the requirements of water and gas discharge of deep mining natural gas wells.
When the gas well foam discharging agent provided by the third aspect of the embodiment of the application is used for carrying out drainage gas production treatment on a natural gas well, the gas well foam discharging agent has the characteristics of high foam stability, high temperature resistance, salt resistance, good oil resistance, ideal drainage effect and the like. Therefore, the gas well foam drainage agent is used for drainage and gas production treatment of a natural gas well, can realize efficient drainage and gas production of the natural gas well, is suitable for drainage and gas production of a gas well with single problems such as high temperature, high mineralization degree, high condensate oil and the like, and is suitable for drainage and gas production of a gas well with complex problems such as high temperature, high mineralization degree, high condensate oil and the like, and the drainage and gas production of a deep-mining natural gas well are met.
The technical scheme of the invention will be further described in connection with specific embodiments.
Example 1
The embodiment provides a preparation method of a gas well foam discharging agent, which specifically comprises the following steps:
at room temperature, lauroyl propyl trimethyl ammonium chloride, sodium lauroyl glutamate, dodecyl amide propyl betaine, dodecanol and trisodium nitrilotriacetate are dissolved in 200mL of clear water according to the molar ratio of 2.9mM to 1.9mM to 1.2mM to 4mM to 10mM, and ultrasonic treatment is carried out, so as to obtain the gas well foam discharging agent YG1.
Example 2
The embodiment provides a preparation method of a gas well foam discharging agent, which specifically comprises the following steps:
At room temperature, lauroyl propyl trimethyl ammonium chloride, sodium lauroyl glycinate, tetradecylamidopropyl betaine, tetradecanol and sodium iminodiacetate are dissolved in 200mL of clear water according to the molar ratio of 2mM to 1mM to 3mM to 8mM and are subjected to ultrasonic treatment to obtain the gas well foam discharging agent YG2.
Example 3
The embodiment provides a preparation method of a gas well foam discharging agent, which specifically comprises the following steps:
at room temperature, lauroyl propyl trimethyl ammonium chloride, sodium lauroyl lysine, cetyl amidopropyl betaine, cetyl alcohol and trisodium nitrilotriacetate are dissolved in 200mL of clear water according to the molar ratio of 3mM to 2mM to 4.5mM to 10mM and subjected to ultrasonic treatment, so as to obtain the gas well foam discharging agent YG3.
Example 4
The embodiment provides a preparation method of a gas well foam discharging agent, which specifically comprises the following steps:
At room temperature, tetradecyl propyl trimethyl ammonium chloride, sodium lauroyl glutamate, dodecyl amide propyl betaine, cetyl alcohol and sodium aminoacetate are dissolved in 200mL of clear water according to the molar ratio of 2.9mM:1.9mM:1.2mM:4mM:6mM and treated by ultrasonic waves to obtain the gas well foam discharging agent YG4.
Example 5
The embodiment provides a preparation method of a gas well foam discharging agent, which specifically comprises the following steps:
At room temperature, cetyl propyl trimethyl ammonium chloride, sodium lauroyl glycinate, cetyl amidopropyl betaine, tetradecanol and trisodium nitrilotriacetate are dissolved in 200mL of clear water according to the molar ratio of 3.5mM to 2.5mM to 2mM to 5mM to 10mM and are subjected to ultrasonic treatment, so that the gas well foam discharging agent YG5 is obtained.
Example 6
The embodiment provides a preparation method of a gas well foam discharging agent, which specifically comprises the following steps:
at room temperature, tetradecyl propyl trimethyl ammonium chloride, sodium lauroyl lysine, tetradecyl amidopropyl betaine, dodecanol and sodium iminodiacetate are dissolved in 200mL of clear water according to the molar ratio of 4mM:3 mM:5mM:9mM and are subjected to ultrasonic treatment, so as to obtain the gas well foam discharging agent YG6.
Example 7
The embodiment provides a preparation method of a gas well foam discharging agent, which specifically comprises the following steps:
At room temperature, cetyl propyl trimethyl ammonium chloride, sodium lauroyl glycinate, dodecyl amidopropyl betaine, dodecanol and sodium aminoacetate were dissolved in 200mL of clear water at a molar ratio of 2.9mM:1.9mM:1.2mM:4mM:10mM and sonicated to obtain gas well foam discharging agent YG7.
Example 8
The embodiment provides a preparation method of a gas well foam discharging agent, which specifically comprises the following steps:
At room temperature, tetradecyl propyl trimethyl ammonium chloride, sodium lauroyl glycinate, tetradecyl amidopropyl betaine, tetradecyl alcohol and sodium aminoacetate are dissolved in 200mL of clear water according to the molar ratio of 3.5mM to 2.5mM to 4mM to 10mM and are subjected to ultrasonic treatment, so that the gas well foam discharging agent YG8 is obtained.
Example 9
The embodiment provides a preparation method of a gas well foam discharging agent, which specifically comprises the following steps:
At room temperature, cetyl propyl trimethyl ammonium chloride, sodium lauroyl glutamate, tetradecyl amidopropyl betaine, cetyl alcohol and sodium iminodiacetate are dissolved in 200mL of clear water according to the molar ratio of 3.5mM to 2.5mM to 2mM to 5mM to 8mM and are subjected to ultrasonic treatment, so as to obtain the gas well foam discharging agent YG9.
Example 10
The embodiment provides a preparation method of a gas well foam discharging agent, which specifically comprises the following steps:
At room temperature, cetyl propyl 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 4mM:3mM:2.5mM:4mM and sonicated to obtain gas well foam discharging agent YG10.
In order to verify the actual performance of the gas well foam discharging agents YG1-YG10 prepared by the embodiment of the application, the foaming performance, foam stabilizing performance and liquid carrying performance of the gas well foam discharging agents YG1-YG10 are tested, and the gas well foam discharging agents comprise:
1. Foaming properties and foam stabilizing properties of the gas well foaming and discharging agents YG1 to YG10 were tested according to SY/T5350-2009 foaming agent evaluation procedure for drilling fluids. The specific test process is as follows:
The foaming volume and half-life were measured by stirring 100mL of the gas well foam discharging agent prepared, stirring in a high speed stirrer for 3min at 7000 rpm, and pouring the foam into a measuring cylinder to measure the maximum foaming volume and half-life (time taken to precipitate 50mL of solution).
2. The liquid carrying properties of the gas well foam discharging agents YG1-YG10 were tested according to SY/T7494-2020, experimental evaluation method for foaming agent for oil and gas field. The specific test process is as follows: and (3) dispersing the nitrogen into micro bubbles through a glass sand core by adopting a foam liquid carrying evaluation device, introducing the micro bubbles into a glass column, controlling the gas flow rate at 400mL/min, and carrying the liquid out of the column by using the generated foam. The amount of liquid carried out with the foam when the nitrogen was introduced for 9min was measured for the different concentrations of the foam discharging agent solution.
Test conditions: clear water (mineralization = 0 mg/L), free of condensate and room temperature (25 ℃);
The test results are set forth in table 1 below. The results of foaming, foam stabilization and liquid carrying tests of the gas well foam discharging agents YG1-YG10 according to the embodiment of the present application are shown in Table 1.
TABLE 1 foaming, foam stabilization and liquid carrying properties of gas well foam discharging agents YG1-YG10 in clear water at room temperature
| Gas well foam discharging agent | Foaming volume/mL | Half life/min | Liquid carrying rate/% |
| Gas well foam discharging agent YG1 | 455 | 25 | 28.8 |
| Gas well foam discharging agent YG2 | 430 | 23 | 30.2 |
| Gas well foam discharging agent YG3 | 450 | 30 | 33.5 |
| Gas well foam discharging agent YG4 | 445 | 28 | 29.5 |
| Gas well foam discharging agent YG5 | 435 | 32 | 33.5 |
| Gas well foam discharging agent YG6 | 465 | 33 | 37.3 |
| Gas well foam discharging agent YG7 | 440 | 25 | 28.9 |
| Gas well foam discharging agent YG8 | 450 | 28 | 30.2 |
| Gas well foam discharging agent YG9 | 445 | 35 | 32.5 |
| Gas well foam discharging agent YG10 | 455 | 38 | 33.2 |
As can be seen from table 1, the gas well foam discharging agent prepared in the example of the present application has excellent foaming, foam stabilizing and liquid carrying capabilities in a clear water system. Among these, the gas well foam discharging agent YG6 was relatively excellent in foaming property and liquid carrying property, and it was demonstrated that the compound surfactant formed by dissolving tetradecyl propyl trimethyl ammonium chloride, sodium lauroyl lysine, tetradecyl amidopropyl betaine, dodecanol and sodium iminodiacetate in water at a molar ratio of 4mM:3mM: 5mM:9mM was excellent.
The application also tests the foaming, foam stabilizing and liquid carrying performances of the gas well foam discharging agent YG1 prepared by the embodiment of the application under the conditions of high mineralization degree, condensate oil and high temperature. Wherein the test conditions are shown in Table 2 below.
TABLE 2 test conditions
| Project | 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 condition 2 | 0 | 50 | 25 |
| Test condition 3 | 0 | 0 | 90 |
The test results are set forth 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 high mineralization, high condensate and high temperature test results
| Gas well foam discharging agent | Foaming 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, the gas well foam discharging agent YG1 maintains good foaming, foam stabilizing and liquid carrying properties under the conditions of high mineralization degree, high condensate content and high temperature. The gas well foam discharging agent prepared by the embodiment of the application is suitable for drainage gas production of gas wells with the problems of high temperature, high mineralization degree, high condensate oil and the like, and meets the drainage gas production requirements of deep mining natural gas wells.
Fig. 1 shows a microscopic image (room temperature, scale 1.0 mm) of foam formation of gas well foam-removing agent solution sample YG1 at different decay times.
According to fig. 1, it can be seen that the foam generated by the gas well foam discharging agent YG1 is still thicker in liquid film after decaying for 45min, which indicates that the gas well foam discharging agent YG1 has higher foam stabilizing property, indicating that the gas well foam discharging agent YG1 has good liquid holding and carrying property.
Various embodiments in this specification are described in an incremental manner, and identical or similar parts of the various embodiments are referred to each other, with each embodiment focusing on differences from the other embodiments.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the present application; although the 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 scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (6)
1. A gas well foam discharging agent comprising water and the following components dissolved in the water: alkyl acyl propyl trimethyl ammonium chloride, amino acid surfactant, betaine surfactant, higher alcohols and sodium amino acid;
Wherein the molar ratio of the alkyl acyl propyl trimethyl ammonium chloride to the amino acid surfactant to the betaine surfactant to the high carbon alcohol to the amino acid sodium is (2-4): 1-3-5): 1-10;
the amino acid surfactant is any one of sodium lauroyl glutamate, sodium lauroyl glycinate and sodium lauroyl lysine;
The betaine surfactant has a chemical structure shown in the following formula (2):
(2)
In the formula (2), R 2 is any one of alkyl groups of C 12-C18;
the sodium amino acid has a chemical structure shown in the following formula (4):
(4)
In formula (4), R 4 and R 5 are each independently selected from-H or-CH 2 COONa.
2. The gas well foam-removing agent according to claim 1, wherein 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.
3. A gas well foam discharging agent according to claim 1 or 2, wherein said alkylacyl propyl trimethyl ammonium chloride has a chemical structure represented by the following formula (1):
(1)
In formula (1), R 1 is any one of alkyl groups of C 12-C18.
4. A gas well foam discharging agent according to claim 1 or 2, wherein said higher alcohol has a chemical structure represented by the following formula (3):
R3-OH (3)
In formula (3), R 3 is any one of alkyl groups of C 10-C16.
5. A method of preparing a gas well foam-displacement agent according to any one of claims 1 to 4, comprising the steps of: and dissolving the component raw materials contained in the gas well foam discharging agent in water and performing ultrasonic treatment to obtain the gas well foam discharging agent.
6. Use of a gas well foam drainage agent according to any one of claims 1 to 4 in drainage and production treatments of natural gas wells.
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