CN114933892A - Foam discharging agent for liquid discharging and gas production of natural gas well and preparation method and application thereof - Google Patents
Foam discharging agent for liquid discharging and gas production of natural gas well and preparation method and application thereof Download PDFInfo
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- CN114933892A CN114933892A CN202210588656.4A CN202210588656A CN114933892A CN 114933892 A CN114933892 A CN 114933892A CN 202210588656 A CN202210588656 A CN 202210588656A CN 114933892 A CN114933892 A CN 114933892A
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- natural gas
- gas well
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- sleeve layer
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- 238000007599 discharging Methods 0.000 title claims abstract description 69
- 239000006260 foam Substances 0.000 title claims abstract description 69
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 63
- 239000007789 gas Substances 0.000 title claims abstract description 54
- 239000002343 natural gas well Substances 0.000 title claims abstract description 49
- 239000007788 liquid Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 37
- 239000002280 amphoteric surfactant Substances 0.000 claims abstract description 13
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 239000002904 solvent Substances 0.000 claims abstract description 10
- 239000002195 soluble material Substances 0.000 claims abstract description 7
- 238000009835 boiling Methods 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims abstract description 3
- -1 sodium carboxylate Chemical class 0.000 claims description 30
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 27
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 27
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 claims description 26
- 239000000654 additive Substances 0.000 claims description 16
- 230000000996 additive effect Effects 0.000 claims description 16
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 13
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 13
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 claims description 13
- 229910052708 sodium Inorganic materials 0.000 claims description 13
- 239000011734 sodium Substances 0.000 claims description 13
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 12
- 229920002472 Starch Polymers 0.000 claims description 12
- 238000007731 hot pressing Methods 0.000 claims description 12
- 229920002401 polyacrylamide Polymers 0.000 claims description 12
- 238000005201 scrubbing Methods 0.000 claims description 12
- 235000010413 sodium alginate Nutrition 0.000 claims description 12
- 229940005550 sodium alginate Drugs 0.000 claims description 12
- 239000000661 sodium alginate Substances 0.000 claims description 12
- 235000019698 starch Nutrition 0.000 claims description 12
- 239000008107 starch Substances 0.000 claims description 12
- 239000012752 auxiliary agent Substances 0.000 claims description 11
- VQKRICOACISPIM-UHFFFAOYSA-N CCCCCCCCCCCC1N=C(CC(O)=O)N(CCO)C1 Chemical compound CCCCCCCCCCCC1N=C(CC(O)=O)N(CCO)C1 VQKRICOACISPIM-UHFFFAOYSA-N 0.000 claims description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 229940080313 sodium starch Drugs 0.000 claims description 6
- 229940032147 starch Drugs 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 3
- 239000013051 drainage agent Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920000747 poly(lactic acid) Polymers 0.000 description 2
- 239000004626 polylactic acid Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/594—Compositions used in combination with injected gas, e.g. CO2 orcarbonated gas
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Treating Waste Gases (AREA)
- Separation Of Particles Using Liquids (AREA)
Abstract
The invention relates to a foam discharging agent for liquid drainage and gas production of a natural gas well as a preparation method and application thereof, wherein the foam discharging agent consists of a plurality of exhaust balls, each foam discharging ball comprises an outer sleeve layer and an inner sleeve layer which are sequentially arranged from outside to inside, the outer sleeve layer and the inner sleeve layer are both arranged in a sealing manner, the outer sleeve layer is made of a water-soluble material, and the thickness of the inner sleeve layer is 0.3-1 mm; the inner cavity of the inner sleeve layer is filled with a low-boiling point solvent, the cavity between the inner sleeve layer and the outer sleeve layer is filled with drainage-assisting liquid, and the drainage-assisting liquid is a composition which comprises the following components in parts by weight: 9-15 parts of anionic surfactant, 10-25 parts of amphoteric surfactant and 2-8 parts of assistant. The foam discharging agent is mainly applied to gas production treatment of high-temperature and high-salt natural gas wells, and is wrapped by an outer sleeve layer, so that the loss of the foam discharging agent in the conveying process is reduced, and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of natural gas collection, in particular to a foam discharging agent for liquid discharging and gas collecting of a natural gas well as a preparation method and application thereof.
Background
The water producing gas well for collecting natural gas is divided into a water-free production period and a water drainage gas production period in the whole production stage, wherein the yield is high in the production process of the water-free production period, the process is simple, the production cost is low, the formation energy gradually loses along with the gas production process, the gas yield of the gas well is lower than the critical liquid carrying flow, the produced gas is not enough to carry the produced formation water or condensate to the ground, the produced liquid is accumulated at the bottom of the well, and if measures are not taken in time, the bottom water can seriously reduce the gas yield, even the gas well is flooded and stops producing. At present, in order to improve gas recovery efficiency, a foam discharging agent is often injected into a production well through a mouth, and the foam discharging agent is uniformly mixed with accumulated liquid at the bottom of the well and forms a compact foam flow under the action of natural gas flow after reaching the bottom of the well, so that the accumulated liquid at the bottom of the well is discharged.
The existing foam scrubbing agent is mostly liquid or solid, and is directly thrown into the well bottom through the well mouth, and in the conveying process, the foam scrubbing agent can be attached to the well wall, so that the loss of the foam scrubbing agent is increased, and the production cost is improved.
Disclosure of Invention
The invention provides a foam discharging agent for liquid discharge and gas production of a natural gas well, and a preparation method and application thereof, and aims to solve the problems.
The technical scheme adopted by the invention is as follows: a foam discharging agent for liquid drainage and gas production of a natural gas well comprises a plurality of gas discharge balls, each foam discharging ball comprises an outer sleeve layer and an inner sleeve layer which are sequentially arranged from outside to inside, the outer sleeve layer and the inner sleeve layer are hermetically arranged, the outer sleeve layer is made of water-soluble materials, and the thickness of the inner sleeve layer is 0.3-1 mm; the inner cavity of the inner sleeve layer is filled with a low-boiling-point solvent, and a cavity between the inner sleeve layer and the outer sleeve layer is filled with drainage-assisting liquid, wherein the drainage-assisting liquid is a composition which comprises the following components in parts by weight: 9-15 parts of anionic surfactant, 10-25 parts of amphoteric surfactant and 2-8 parts of assistant.
Based on the above, the water-soluble material is a water-soluble film made of polyvinyl alcohol, and the thickness of the water-soluble film is 1-1.5 mm.
Based on the above, the inner sleeve layer and the outer sleeve layer are made of the same material.
Based on the above, the inner coating is selected from biodegradable films.
Based on the above, the anionic surfactant comprises fatty alcohol-polyoxyethylene ether ammonium sulfate and fatty alcohol-polyoxyethylene ether sodium carboxylate, and the weight ratio of the fatty alcohol-polyoxyethylene ether ammonium sulfate to the fatty alcohol-polyoxyethylene ether sodium carboxylate is 2: 1; the amphoteric surfactant comprises octadecyl dihydroxyethyl amine oxide and undecyl carboxymethyl hydroxyethyl imidazoline; the weight ratio of the two is 3: 2; the auxiliary agent comprises polyacrylamide, sodium alginate and starch in a weight ratio of 6:1: 3.
Based on the above, the low-boiling-point solvent comprises acrylate and cyclopentane, and the mass ratio of the acrylate to the cyclopentane is 1: 4.
A preparation method of a foam discharging agent for liquid discharging and gas production of a natural gas well comprises the following steps:
(1) filling the low-boiling-point solvent into the inner sleeve layer and carrying out hot-pressing sealing on the inner sleeve layer to obtain a built-in expansion body;
(2) and (2) placing the built-in expansion body prepared in the step (1) into a shell, filling a discharge assistant into the shell, and carrying out hot-pressing sealing on the shell.
Based on the above, the preparation method of the cleanup additive comprises the following steps: and (3) taking the anionic surfactant, the amphoteric surfactant and the auxiliary agent in corresponding parts by weight, and mixing the anionic surfactant, the amphoteric surfactant and the auxiliary agent to obtain the corresponding cleanup additive.
The foam discharging agent is applied to gas production treatment of a high-temperature and high-salt natural gas well.
Compared with the prior art, the invention has the following advantages: (1) the foam discharging agent is wrapped by the outer sleeve layer, so that the loss of the foam discharging agent in the conveying process is reduced, and the production cost is reduced; (2) the auxiliary agent and the surfactant have a certain synergistic effect, so that the stability of the foam is improved, and the liquid discharge effect of the foam discharging agent can be improved to a certain extent; (3) the gas is conveniently conveyed to the underground through the arrangement of the inner sleeve layer, the gas quantity in the gas well is improved, and the liquid discharge quantity of the gas well is improved.
Detailed Description
For a better illustration of the invention, it will now be further illustrated with reference to examples.
A foam discharging agent for liquid drainage and gas production of a natural gas well comprises a plurality of gas discharge balls, each foam discharging ball comprises an outer sleeve layer and an inner sleeve layer which are sequentially arranged from outside to inside, the outer sleeve layer and the inner sleeve layer are hermetically arranged, the outer sleeve layer is made of water-soluble materials, and the thickness of the inner sleeve layer is 0.3-1 mm; the inner cavity of the inner sleeve layer is filled with a low-boiling point solvent, and the cavity between the inner sleeve layer and the outer sleeve layer is filled with drainage-assisting liquid which comprises the following components in parts by weight: 9-15 parts of anionic surfactant, 10-25 parts of amphoteric surfactant and 2-8 parts of auxiliary agent; the water-soluble material is a water-soluble film made of polyvinyl alcohol, and the thickness of the water-soluble film is 1-1.5 mm; the inner jacket volume is 1/2 the outer jacket volume.
The inner sleeve layer and the outer sleeve layer are made of the same material, or the inner sleeve layer is selected from biodegradable films.
The anionic surfactant comprises fatty alcohol-polyoxyethylene ether ammonium sulfate and fatty alcohol-polyoxyethylene ether sodium carboxylate, and the weight ratio of the fatty alcohol-polyoxyethylene ether ammonium sulfate to the fatty alcohol-polyoxyethylene ether sodium carboxylate is 2: 1; the amphoteric surfactant comprises octadecyl dihydroxyethyl amine oxide and undecyl carboxymethyl hydroxyethyl imidazoline; the weight ratio of the two is 3: 2; the auxiliary agent comprises polyacrylamide, sodium alginate and starch, and the weight ratio of the polyacrylamide to the sodium alginate to the starch is 6:1: 3.
The low-boiling-point solvent comprises acrylate and cyclopentane, and the mass ratio of the acrylate to the cyclopentane is 1: 4.
A preparation method of a foam discharging agent for liquid discharging and gas production of a natural gas well comprises the following steps:
(1) filling the low-boiling-point solvent into the inner sleeve layer and carrying out hot-pressing sealing on the inner sleeve layer to obtain a built-in expansion body;
(2) and (2) placing the built-in expansion body prepared in the step (1) into a shell, filling a discharge assistant into the shell, and carrying out hot-pressing sealing on the shell.
The preparation method of the cleanup additive comprises the following steps: and (3) taking the anionic surfactant, the amphoteric surfactant and the auxiliary agent in corresponding parts by weight, and mixing the anionic surfactant, the amphoteric surfactant and the auxiliary agent to obtain the corresponding cleanup additive.
The foam scrubbing agent is applied to gas production treatment of high-temperature and high-salinity natural gas wells.
Example 1
A bubble discharging agent for liquid drainage and gas production of a natural gas well comprises a plurality of gas discharging balls, each bubble discharging ball comprises an outer sleeve layer and an inner sleeve layer which are sequentially arranged from outside to inside, the outer sleeve layer and the inner sleeve layer are hermetically arranged, the outer sleeve layer and the inner sleeve layer are made of the same material, the outer sleeve layer is made of a water-soluble film made of polyvinyl alcohol, the thickness of the water-soluble film is 1mm, and the thickness of the inner sleeve layer is 0.3 mm; the inner cavity of the inner sleeve layer is filled with acrylic ester and cyclopentane in a mass ratio of 1:4, and a liquid-assisted discharge is filled in the cavity between the inner sleeve layer and the outer sleeve layer and comprises the following components in parts by weight: 6 parts of fatty alcohol-polyoxyethylene ether ammonium sulfate, 3 parts of fatty alcohol-polyoxyethylene ether sodium carboxylate, 6 parts of octadecyl dihydroxyethyl amine oxide, 4 parts of undecyl carboxymethyl hydroxyethyl imidazoline, 1.2 parts of polyacrylamide, 0.2 part of sodium alginate and 0.6 part of starch.
The preparation method of the foam scrubbing agent comprises the following steps:
(1) filling the acrylic ester and the cyclopentane into the inner sleeve layer, and carrying out hot-pressing sealing on the inner sleeve layer to obtain a built-in expansion body;
(2) and (2) placing the built-in expansion body prepared in the step (1) into a shell, filling a discharge assistant into the shell, and carrying out hot-pressing sealing on the shell.
The preparation method of the cleanup additive comprises the following steps: taking fatty alcohol-polyoxyethylene ether ammonium sulfate, fatty alcohol-polyoxyethylene ether sodium carboxylate, octadecyl dihydroxyethyl amine oxide, undecyl carboxymethyl hydroxyethyl imidazoline, polyacrylamide, sodium alginate and starch in corresponding parts by weight, and uniformly mixing to obtain the corresponding cleanup additive.
Example 2
A bubble discharging agent for liquid drainage and gas production of a natural gas well comprises a plurality of gas discharging balls, each bubble discharging ball comprises an outer sleeve layer and an inner sleeve layer which are sequentially arranged from outside to inside, the outer sleeve layer and the inner sleeve layer are hermetically arranged, the outer sleeve layer and the inner sleeve layer are made of the same material, the outer sleeve layer is made of a water-soluble film made of polyvinyl alcohol, the thickness of the water-soluble film is 1.5mm, and the thickness of the inner sleeve layer is 0.5 mm; the inner cavity of the inner sleeve layer is filled with acrylate and cyclopentane with the mass ratio of 1:4, and the cavity between the inner sleeve layer and the outer sleeve layer is filled with drainage-assisting liquid which comprises the following components in parts by weight: 10 parts of fatty alcohol-polyoxyethylene ether ammonium sulfate, 5 parts of fatty alcohol-polyoxyethylene ether sodium carboxylate, 15 parts of octadecyl dihydroxyethyl amine oxide, 10 parts of undecyl carboxymethyl hydroxyethyl imidazoline, 4.8 parts of polyacrylamide, 0.8 part of sodium alginate and 2.4 parts of starch.
The preparation method of the foam scrubbing agent comprises the following steps:
(1) filling the acrylic ester and the cyclopentane into the inner sleeve layer, and carrying out hot-pressing sealing on the inner sleeve layer to obtain a built-in expansion body;
(2) and (2) placing the built-in expansion body prepared in the step (1) into a shell, filling a discharge assistant into the shell, and carrying out hot-pressing sealing on the shell.
The preparation method of the cleanup additive comprises the following steps: taking fatty alcohol-polyoxyethylene ether ammonium sulfate, fatty alcohol-polyoxyethylene ether sodium carboxylate, octadecyl dihydroxyethyl amine oxide, undecyl carboxymethyl hydroxyethyl imidazoline, polyacrylamide, sodium alginate and starch in corresponding parts by weight, and uniformly mixing to obtain the corresponding cleanup additive.
Example 3
A bubble discharging agent for liquid drainage and gas production of a natural gas well comprises a plurality of gas discharging balls, each bubble discharging ball comprises an outer sleeve layer and an inner sleeve layer which are sequentially arranged from outside to inside, the outer sleeve layer and the inner sleeve layer are hermetically arranged, the outer sleeve layer is made of a water-soluble film made of polyvinyl alcohol, the thickness of the water-soluble film is 1.2mm, the thickness of the inner sleeve layer is 1mm, the inner sleeve layer is a biodegradable film, and the film is made of polylactic acid in the embodiment; the inner cavity of the inner sleeve layer is filled with acrylic ester and cyclopentane in a mass ratio of 1:4, and a liquid-assisted discharge is filled in the cavity between the inner sleeve layer and the outer sleeve layer and comprises the following components in parts by weight: 8 parts of fatty alcohol-polyoxyethylene ether ammonium sulfate, 4 parts of fatty alcohol-polyoxyethylene ether sodium carboxylate, 9 parts of octadecyl dihydroxyethyl amine oxide, 6 parts of undecyl carboxymethyl hydroxyethyl imidazoline, 3.6 parts of polyacrylamide, 0.6 part of sodium alginate and 1.8 parts of starch.
The preparation method of the foam scrubbing agent comprises the following steps:
(1) filling the acrylic ester and the cyclopentane into the inner sleeve layer, and carrying out hot-pressing sealing on the inner sleeve layer to obtain a built-in expansion body;
(2) and (2) placing the built-in expansion body prepared in the step (1) in a shell, filling a discharge assistant into the shell, and carrying out hot-pressing sealing on the shell.
The preparation method of the cleanup additive comprises the following steps: taking fatty alcohol-polyoxyethylene ether ammonium sulfate, fatty alcohol-polyoxyethylene ether sodium carboxylate, octadecyl dihydroxyethyl amine oxide, undecyl carboxymethyl hydroxyethyl imidazoline, polyacrylamide, sodium alginate and starch in corresponding parts by weight, and uniformly mixing to obtain the corresponding cleanup additive.
Comparative example 1
A bubble discharging agent for liquid drainage and gas production of a natural gas well comprises a plurality of gas discharging balls, each bubble discharging ball comprises an outer sleeve layer and an inner sleeve layer which are sequentially arranged from outside to inside, the outer sleeve layer and the inner sleeve layer are hermetically arranged, the outer sleeve layer is made of a water-soluble film made of polyvinyl alcohol, the thickness of the water-soluble film is 1.2mm, the thickness of the inner sleeve layer is 1mm, and the inner sleeve layer is made of polylactic acid; the inner cavity of the inner sleeve layer is filled with acrylic ester and cyclopentane in a mass ratio of 1:4, and a liquid-assisted discharge is filled in the cavity between the inner sleeve layer and the outer sleeve layer and comprises the following components in parts by weight: 8 parts of fatty alcohol-polyoxyethylene ether ammonium sulfate, 4 parts of fatty alcohol-polyoxyethylene ether sodium carboxylate, 9 parts of octadecyl dihydroxyethyl amine oxide, 6 parts of undecyl carboxymethyl hydroxyethyl imidazoline and 1.8 parts of starch.
The cleanup additive of example 1 and the cleanup additive of comparative example 1 were prepared as solutions of 0.1 mass% ammonium fatty alcohol polyoxyethylene ether sulfate, respectively, and tested for foaming performance at room temperature, with the foam of example 1 having an initial height of 450ml and a half-life of 267s, while the foam of comparative example 1 having an initial height of 382ml and a half-life of 167 s. Therefore, the foam performance of the cleanup additive in example 1 is superior to that in comparative example 1, so that the addition of polyacrylamide and sodium alginate improves the foam performance of the cleanup additive.
The foregoing description is only of the preferred embodiments of the present invention, and it should be noted that various changes and modifications can be made by those skilled in the art without departing from the overall concept of the invention, and these should also be considered as the protection scope of the present invention.
Claims (9)
1. A foam discharging agent for liquid discharging and gas production of a natural gas well is characterized in that: the foam discharging agent consists of a plurality of exhaust balls, each foam discharging ball comprises an outer sleeve layer and an inner sleeve layer which are sequentially arranged from outside to inside, the outer sleeve layer and the inner sleeve layer are hermetically arranged, the outer sleeve layer is made of water-soluble materials, and the thickness of the inner sleeve layer is 0.3-1 mm; the inner cavity of the inner sleeve layer is filled with a low-boiling point solvent, the cavity between the inner sleeve layer and the outer sleeve layer is filled with drainage-assisting liquid, and the drainage-assisting liquid is a composition which comprises the following components in parts by weight: 9-15 parts of anionic surfactant, 10-25 parts of amphoteric surfactant and 2-8 parts of assistant.
2. The foam scrubbing agent for liquid recovery of natural gas wells as claimed in claim 1, wherein: the water-soluble material is a water-soluble film made of polyvinyl alcohol, and the thickness of the water-soluble film is 1-1.5 mm.
3. The foam discharging agent for gas well liquid drainage and gas production according to claim 1 or 2, characterized in that: the inner sleeve layer and the outer sleeve layer are made of the same material.
4. The foam scrubbing agent for liquid recovery of natural gas wells as claimed in claim 2, wherein: the inner lining layer is selected from biodegradable films.
5. The foam discharging agent for liquid drainage and gas production of the natural gas well as the preparation method of the foam discharging agent for liquid drainage and gas production of the natural gas well as the preparation method of the foam discharging agent for the natural gas well as the preparation method of the foam discharging agent for the liquid drainage and gas production of the natural gas well as the preparation method of the foam discharging agent for the natural gas well as the foam discharging agent for the liquid drainage and the natural gas well as the foam discharging agent for the natural gas well as the preparation of the natural gas well as the preparation method of the foam discharging agent for the natural gas well as the foam discharging agent for the liquid drainage and the natural gas well as the preparation method of the foam discharging agent for the natural gas well as the preparation of the natural gas well as the foam discharging agent for the natural gas well as the foam discharging agent for the natural gas well as the gas well as the preparation method are characterized by the foam discharging agent for the natural gas well as the following steps as the foam discharging agent for the following steps as the foam discharging agent for the gas well as the following steps as the gas well as the foam discharging agent for the gas well as the: the anionic surfactant comprises fatty alcohol-polyoxyethylene ether ammonium sulfate and fatty alcohol-polyoxyethylene ether sodium carboxylate, and the weight ratio of the fatty alcohol-polyoxyethylene ether ammonium sulfate to the fatty alcohol-polyoxyethylene ether sodium carboxylate is 2: 1; the amphoteric surfactant comprises octadecyl dihydroxyethyl amine oxide and undecyl carboxymethyl hydroxyethyl imidazoline; the weight ratio of the two is 3: 2; the auxiliary agent comprises polyacrylamide, sodium alginate and starch, and the weight ratio of the polyacrylamide to the sodium alginate to the starch is 6:1: 3.
6. The foam discharging agent for liquid drainage and gas production of the natural gas well as the preparation method of the foam discharging agent for liquid drainage and gas production of the natural gas well as the preparation method of the foam discharging agent for the natural gas well as the preparation method of the foam discharging agent for the liquid drainage and gas production of the natural gas well as the preparation method of the foam discharging agent for the natural gas well as the preparation of the natural gas well as the preparation method of the foam discharging agent for the natural gas well as the liquid drainage agent for the preparation of the natural gas well as the foam discharging agent for the natural gas well as the foam discharging agent for the gas well as the natural gas well as the preparation of the gas well as the natural gas well as the preparation of the following claim 5 are characterized by the following steps as the foam discharging agent for the following steps as the following steps and the following steps: the low-boiling-point solvent comprises acrylate and cyclopentane, and the mass ratio of the acrylate to the cyclopentane is 1: 4.
7. The preparation method of the foam discharging agent for discharging and producing gas of the natural gas well as claimed in any one of claims 1 to 6 is characterized in that: the preparation method comprises the following steps:
(1) filling the low-boiling-point solvent into the inner sleeve layer and carrying out hot-pressing sealing on the inner sleeve layer to obtain a built-in expansion body;
(2) and (2) placing the built-in expansion body prepared in the step (1) into a shell, filling a discharge assistant into the shell, and carrying out hot-pressing sealing on the shell.
8. The preparation method of the foam discharging agent for liquid drainage and gas production of the natural gas well as claimed in claim 7 is characterized in that: the preparation method of the cleanup additive comprises the following steps: and (3) taking the anionic surfactant, the amphoteric surfactant and the auxiliary agent in corresponding parts by weight, and mixing the anionic surfactant, the amphoteric surfactant and the auxiliary agent to obtain the corresponding cleanup additive.
9. The application of the foam scrubbing agent for the liquid drainage and gas production of the natural gas well as in the claim 6 is characterized in that: the foam scrubbing agent is applied to gas production treatment of high-temperature and high-salinity natural gas wells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210588656.4A CN114933892A (en) | 2022-05-27 | 2022-05-27 | Foam discharging agent for liquid discharging and gas production of natural gas well and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210588656.4A CN114933892A (en) | 2022-05-27 | 2022-05-27 | Foam discharging agent for liquid discharging and gas production of natural gas well and preparation method and application thereof |
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| Publication Number | Publication Date |
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| CN114933892A true CN114933892A (en) | 2022-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210588656.4A Pending CN114933892A (en) | 2022-05-27 | 2022-05-27 | Foam discharging agent for liquid discharging and gas production of natural gas well and preparation method and application thereof |
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| CN (1) | CN114933892A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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