CN112457450A - Amphoteric temporary plugging agent and preparation method thereof - Google Patents
Amphoteric temporary plugging agent and preparation method thereof Download PDFInfo
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- CN112457450A CN112457450A CN202011281289.0A CN202011281289A CN112457450A CN 112457450 A CN112457450 A CN 112457450A CN 202011281289 A CN202011281289 A CN 202011281289A CN 112457450 A CN112457450 A CN 112457450A
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- Prior art keywords
- amphoteric
- zwitterionic
- temporary plugging
- plugging agent
- temporary
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- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 51
- 229920000642 polymer Polymers 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 16
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 16
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 16
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 16
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 16
- 239000003999 initiator Substances 0.000 claims abstract description 16
- 239000008367 deionised water Substances 0.000 claims abstract description 11
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000178 monomer Substances 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 125000002091 cationic group Chemical group 0.000 claims description 12
- 125000000129 anionic group Chemical group 0.000 claims description 11
- KUDUQBURMYMBIJ-UHFFFAOYSA-N 2-prop-2-enoyloxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOC(=O)C=C KUDUQBURMYMBIJ-UHFFFAOYSA-N 0.000 claims description 10
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000004090 dissolution Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 229920002401 polyacrylamide Polymers 0.000 claims description 9
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 5
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 5
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 5
- 125000004386 diacrylate group Chemical group 0.000 claims description 5
- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 claims description 5
- FGRVOLIFQGXPCT-UHFFFAOYSA-L dipotassium;dioxido-oxo-sulfanylidene-$l^{6}-sulfane Chemical compound [K+].[K+].[O-]S([O-])(=O)=S FGRVOLIFQGXPCT-UHFFFAOYSA-L 0.000 claims description 5
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 claims description 5
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims description 5
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- -1 sodium borate potassium dichromate Chemical compound 0.000 claims description 5
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 5
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical group [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 5
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 5
- FZGFBJMPSHGTRQ-UHFFFAOYSA-M trimethyl(2-prop-2-enoyloxyethyl)azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CCOC(=O)C=C FZGFBJMPSHGTRQ-UHFFFAOYSA-M 0.000 claims description 5
- RRHXZLALVWBDKH-UHFFFAOYSA-M trimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azanium;chloride Chemical compound [Cl-].CC(=C)C(=O)OCC[N+](C)(C)C RRHXZLALVWBDKH-UHFFFAOYSA-M 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002981 blocking agent Substances 0.000 claims 2
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 claims 1
- 239000000243 solution Substances 0.000 description 13
- 150000002500 ions Chemical class 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- BOOMOFPAGCSKKE-UHFFFAOYSA-N butane-2-sulfonic acid;prop-2-enamide Chemical compound NC(=O)C=C.CCC(C)S(O)(=O)=O BOOMOFPAGCSKKE-UHFFFAOYSA-N 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/10—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of amides or imides
-
- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
-
- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
Abstract
The invention discloses an amphoteric temporary plugging agent and a preparation method thereof, wherein the amphoteric temporary plugging agent is prepared from the following raw materials in parts by weight: 50-60 parts of deionized water; 20-30 parts of zwitterionic polymer; 0.5-1 part of zwitterionic crosslinking agent; 0.3-0.5 part of zwitterionic initiator by weight; 10-20 parts of carboxymethyl cellulose. According to the temporary amphoteric plugging agent and the preparation method thereof, the main raw materials of the temporary amphoteric plugging agent prepared by the method are industrial products, the cost is low, the temporary amphoteric plugging agent can be widely used in operation, and meanwhile, after temporary plugging is completed, smooth flowback is realized by utilizing the molecular structure of a polymer and matching with a flowback technology, so that the damage to a stratum is low.
Description
Technical Field
The invention belongs to the technical field of petrochemical industry, and particularly relates to an amphoteric temporary plugging agent and a preparation method thereof.
Background
At present, the widely used temporary plugging agents are classified from the aspect of plugging removal and can be divided into water-soluble temporary plugging agents, oil-soluble temporary plugging agents, acid-soluble temporary plugging agents and the like, wherein the oil-soluble temporary plugging agents are widely applied because the oil-soluble temporary plugging agents can be degraded by crude oil after operation. However, with the development of oil fields, the water content of oil wells of most onshore oil fields in China gradually increases, and taking a Hongkong oil field as an example, the average water content of the oil wells is more than 70%, the water content of part of the oil wells reaches more than 90%, and the degradation rate of the oil-soluble temporary plugging agent is obviously reduced. In addition, the pressure among all layers of the water injection well is unbalanced, in the operation processes of well repair, well killing, sand washing and the like, the leakage of the fluid entering the well is serious, and a plurality of wells cannot normally kill and circulate, so that the operation procedures cannot be continuous, the operation and the normal production of the well are seriously influenced, the stratum is also damaged, and some measures of the water injection well also need to apply a temporary plugging technology.
In the prior art, a foam liquid temporary plugging agent and a particle temporary plugging agent are commonly used, the foam liquid temporary plugging agent has the problems of foam stability and large work load of on-site liquid preparation, so that the cost is high, and the particle temporary plugging agent often has the conditions of particle 'retention' in a gas layer and difficult flowback. Therefore, in the actual operation process and the actual operation process, the temporary plugging effect is poor, liquid is leaked into the stratum, and the backflow is difficult.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an amphoteric temporary plugging agent to solve the problem of poor temporary plugging effect in the prior art.
The second purpose of the present application is to provide a preparation method of the above-mentioned amphoteric temporary plugging agent.
In order to achieve the purpose, the invention provides the following technical scheme: the amphoteric temporary plugging agent is prepared from the following raw materials in parts by weight:
50-60 parts of deionized water;
20-30 parts of zwitterionic polymer;
0.5-1 part of zwitterionic crosslinking agent;
0.3-0.5 part of zwitterionic initiator by weight;
10-20 parts of carboxymethyl cellulose.
Further, the zwitterionic polymer comprises polyacrylamide, a cationic monomer and an anionic monomer, and the zwitterionic polymer is prepared by copolymerizing the polyacrylamide, the cationic monomer and the anionic monomer.
Further, the cationic monomer is selected from one of acryloyloxyethyltrimethyl ammonium chloride, dimethyldiallyl ammonium chloride and methacryloyloxyethyl trimethylammonium chloride.
Further, the anionic monomer is one of acrylamide, methacrylamide, acrylonitrile, acrylic acid, methacrylic acid and acrylamide methyl propane sulfonic acid.
Further, the zwitterionic crosslinking agent is one of ethylene glycol diacrylate, methylene bisacrylamide, sodium borate potassium dichromate and polyethylene glycol diacrylate.
Further, the zwitterion initiator is selected from one of sodium thiosulfate, potassium thiosulfate, ammonium persulfate, sodium persulfate, potassium persulfate and hydrogen peroxide.
A preparation method of the amphoteric temporary plugging agent comprises the following steps:
s1, weighing the components according to the using amounts of the components, putting the carboxymethyl cellulose and the zwitterionic polymer into deionized water, heating and stirring the mixture, and accelerating the dissolution to obtain a reaction solution;
s2, adding a zwitterionic cross-linking agent into the reaction solution, adding a zwitterionic initiator after the reaction solution is fully and uniformly dissolved, and reacting for 4-5h at the temperature of 70-80 ℃ to obtain a reacted rubber block;
and S3, extruding the reacted rubber block by a double-screw extruder, conveying the rubber block into a granulator, and crushing and sieving the rubber block by the granulator to obtain the amphoteric temporary plugging agent particles.
Further, in the S1, the heating and stirring temperature of the carboxymethyl cellulose and the zwitterionic polymer in the water is 45 ℃, and the time for accelerating the dissolution is 3 h.
Compared with the prior art, the amphoteric temporary plugging agent and the preparation method thereof provided by the invention have the following beneficial effects:
1. the amphoteric temporary plugging agent provided by the invention can realize smooth flowback by utilizing the molecular structure of the polymer to match with a flowback technology, and compared with the common foam liquid temporary plugging agent and particle temporary plugging agent in the prior art, the amphoteric temporary plugging agent has the advantages that the problem of overhigh cost caused by large liquid preparation workload is solved, and the situation that particles are retained in an air layer and difficult to flowback is avoided.
2. The preparation method of the amphoteric temporary plugging agent provided by the invention is simple to operate, the main raw materials are industrial products, the cost is low, the amphoteric temporary plugging agent can be widely used in operation, and meanwhile, after temporary plugging is finished, smooth flowback is realized by utilizing the molecular structure of the polymer and matching with a flowback technology, so that the damage to stratum is low.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
The first embodiment is as follows:
the amphoteric temporary plugging agent is prepared from the following raw materials in parts by weight:
50 parts of deionized water;
20 parts of zwitterionic polymer;
the amphoteric ion polymer comprises polyacrylamide, a cationic monomer and an anionic monomer, wherein the amphoteric ion polymer is prepared by copolymerizing the polyacrylamide, the cationic monomer is one of acryloyloxyethyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride and methacryloyloxyethyl trimethyl ammonium chloride, and the anionic monomer is one of acrylamide, methacrylamide, acrylonitrile, acrylic acid, methacrylic acid and acrylamide methyl propane sulfonic acid.
0.5 part of zwitterionic crosslinking agent;
the zwitterionic cross-linking agent is one of ethylene glycol diacrylate, methylene bisacrylamide, sodium borate potassium dichromate and polyethylene glycol diacrylate.
0.3 part of zwitterionic initiator;
the zwitterion initiator is one of sodium thiosulfate, potassium thiosulfate, ammonium persulfate, sodium persulfate, potassium persulfate and hydrogen peroxide.
10 parts of carboxymethyl cellulose.
A preparation method of the amphoteric temporary plugging agent comprises the following steps:
s1, weighing the components according to the using amounts of the components, putting the carboxymethyl cellulose and the zwitterionic polymer into deionized water, heating and stirring for accelerated dissolution, wherein the heating and stirring temperature of the carboxymethyl cellulose and the zwitterionic polymer in the water is 45 ℃, and the accelerated dissolution time is 3 hours, so as to obtain a reaction solution;
s2, adding a zwitterionic cross-linking agent into the reaction solution, adding a zwitterionic initiator after the reaction solution is fully and uniformly dissolved, and reacting for 4 hours at the temperature of 70 ℃ to obtain a reacted rubber block;
and S3, extruding the reacted rubber block by a double-screw extruder, conveying the rubber block into a granulator, and crushing and sieving the rubber block by the granulator to obtain the amphoteric temporary plugging agent particles.
Example two:
the amphoteric temporary plugging agent is prepared from the following raw materials in parts by weight:
deionized water, the weight portion used is 60 portions;
30 parts of zwitterionic polymer;
the amphoteric ion polymer comprises polyacrylamide, a cationic monomer and an anionic monomer, wherein the amphoteric ion polymer is prepared by copolymerizing the polyacrylamide, the cationic monomer is one of acryloyloxyethyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride and methacryloyloxyethyl trimethyl ammonium chloride, and the anionic monomer is one of acrylamide, methacrylamide, acrylonitrile, acrylic acid, methacrylic acid and acrylamide methyl propane sulfonic acid.
1 part of zwitterionic crosslinking agent;
the zwitterionic cross-linking agent is one of ethylene glycol diacrylate, methylene bisacrylamide, sodium borate potassium dichromate and polyethylene glycol diacrylate.
0.5 part of zwitterionic initiator by weight;
the zwitterion initiator is one of sodium thiosulfate, potassium thiosulfate, ammonium persulfate, sodium persulfate, potassium persulfate and hydrogen peroxide.
The carboxymethyl cellulose is used in 20 weight portions.
A preparation method of the amphoteric temporary plugging agent comprises the following steps:
s1, weighing the components according to the using amounts of the components, putting the carboxymethyl cellulose and the zwitterionic polymer into deionized water, heating and stirring for accelerated dissolution, wherein the heating and stirring temperature of the carboxymethyl cellulose and the zwitterionic polymer in the water is 45 ℃, and the accelerated dissolution time is 3 hours, so as to obtain a reaction solution;
s2, adding a zwitterionic cross-linking agent into the reaction solution, adding a zwitterionic initiator after the reaction solution is fully and uniformly dissolved, and reacting for 5 hours at the temperature of 80 ℃ to obtain a reacted rubber block;
and S3, extruding the reacted rubber block by a double-screw extruder, conveying the rubber block into a granulator, and crushing and sieving the rubber block by the granulator to obtain the amphoteric temporary plugging agent particles.
Example three:
the amphoteric temporary plugging agent is prepared from the following raw materials in parts by weight:
deionized water, wherein the used weight portion is 55 portions;
a zwitterionic polymer, used in parts by weight of 25;
the amphoteric ion polymer comprises polyacrylamide, a cationic monomer and an anionic monomer, wherein the amphoteric ion polymer is prepared by copolymerizing the polyacrylamide, the cationic monomer is one of acryloyloxyethyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride and methacryloyloxyethyl trimethyl ammonium chloride, and the anionic monomer is one of acrylamide, methacrylamide, acrylonitrile, acrylic acid, methacrylic acid and acrylamide methyl propane sulfonic acid.
0.75 part of zwitterionic crosslinking agent;
the zwitterionic cross-linking agent is one of ethylene glycol diacrylate, methylene bisacrylamide, sodium borate potassium dichromate and polyethylene glycol diacrylate.
0.4 part of zwitterionic initiator by weight;
the zwitterion initiator is one of sodium thiosulfate, potassium thiosulfate, ammonium persulfate, sodium persulfate, potassium persulfate and hydrogen peroxide.
Carboxymethyl cellulose, used in 15 parts by weight.
A preparation method of the amphoteric temporary plugging agent comprises the following steps:
s1, weighing the components according to the using amounts of the components, putting the carboxymethyl cellulose and the zwitterionic polymer into deionized water, heating and stirring for accelerated dissolution, wherein the heating and stirring temperature of the carboxymethyl cellulose and the zwitterionic polymer in the water is 45 ℃, and the accelerated dissolution time is 3 hours, so as to obtain a reaction solution;
s2, adding a zwitterionic cross-linking agent into the reaction solution, adding a zwitterionic initiator after the reaction solution is fully and uniformly dissolved, and reacting for 4.5 hours at the temperature of 75 ℃ to obtain a reacted rubber block;
and S3, extruding the reacted rubber block by a double-screw extruder, conveying the rubber block into a granulator, and crushing and sieving the rubber block by the granulator to obtain the amphoteric temporary plugging agent particles.
The experimental results of the three examples show that: according to the temporary amphoteric plugging agent and the preparation method thereof, the main raw materials of the temporary amphoteric plugging agent prepared by the method are industrial products, the cost is low, the temporary amphoteric plugging agent can be widely used in operation, and meanwhile, after temporary plugging is completed, smooth flowback is realized by utilizing the molecular structure of a polymer and matching with a flowback technology, so that the damage to a stratum is low.
Claims (8)
1. The amphoteric temporary plugging agent is characterized in that raw materials for preparing the amphoteric temporary plugging agent comprise the following components in parts by weight:
50-60 parts of deionized water;
20-30 parts of zwitterionic polymer;
0.5-1 part of zwitterionic crosslinking agent;
0.3-0.5 part of zwitterionic initiator by weight;
10-20 parts of carboxymethyl cellulose.
2. The temporary plugging agent according to claim 1, wherein said zwitterionic polymer comprises polyacrylamide, a cationic monomer and an anionic monomer, and said zwitterionic polymer is prepared by copolymerizing said zwitterionic polymer and said cationic monomer.
3. The temporary amphoteric blocking agent according to claim 2, wherein the cationic monomer is one selected from the group consisting of acryloyloxyethyltrimethyl ammonium chloride, dimethyldiallyl ammonium chloride, and methacryloyloxyethyl trimethyl ammonium chloride.
4. The amphoteric temporary plugging agent according to claim 2, wherein the anionic monomer is one selected from acrylamide, methacrylamide, acrylonitrile, acrylic acid, methacrylic acid, and acrylamidomethylpropanesulfonic acid.
5. The temporary amphoteric blocking agent according to claim 1, wherein the zwitterionic crosslinking agent is selected from one of ethylene glycol diacrylate, methylene bisacrylamide, sodium borate potassium dichromate, and polyethylene glycol diacrylate.
6. The temporary plugging agent according to claim 1, wherein said zwitterionic initiator is selected from the group consisting of sodium thiosulfate, potassium thiosulfate, ammonium persulfate, sodium persulfate, potassium persulfate, and hydrogen peroxide.
7. A method for preparing an amphoteric temporary plugging agent, which is characterized by preparing the amphoteric temporary plugging agent according to any one of claims 1 to 6, and comprising the following specific steps:
s1, weighing the components according to the using amounts of the components, putting the carboxymethyl cellulose and the zwitterionic polymer into deionized water, heating and stirring the mixture, and accelerating the dissolution to obtain a reaction solution;
s2, adding a zwitterionic cross-linking agent into the reaction solution, adding a zwitterionic initiator after the reaction solution is fully and uniformly dissolved, and reacting for 4-5h at the temperature of 70-80 ℃ to obtain a reacted rubber block;
and S3, extruding the reacted rubber block by a double-screw extruder, conveying the rubber block into a granulator, and crushing and sieving the rubber block by the granulator to obtain the amphoteric temporary plugging agent particles.
8. The method for preparing the amphoteric temporary plugging agent according to claim 7, wherein the temperature of heating and stirring the carboxymethyl cellulose and the zwitterionic polymer in water in the S1 is 45 ℃, and the time for accelerating dissolution is 3 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011281289.0A CN112457450A (en) | 2020-11-16 | 2020-11-16 | Amphoteric temporary plugging agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011281289.0A CN112457450A (en) | 2020-11-16 | 2020-11-16 | Amphoteric temporary plugging agent and preparation method thereof |
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| Publication Number | Publication Date |
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| CN112457450A true CN112457450A (en) | 2021-03-09 |
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| CN202011281289.0A Pending CN112457450A (en) | 2020-11-16 | 2020-11-16 | Amphoteric temporary plugging agent and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092556A (en) * | 2006-06-23 | 2007-12-26 | 中国石油天然气股份有限公司 | Oil soluble cationic broad-spectrum temporary blocking agent in use for drilling fluid |
| CN102061152A (en) * | 2009-11-11 | 2011-05-18 | 中国石油天然气股份有限公司 | High-strength controllable gelout chemical temporary plugging liquid rubber stopper |
| CN102618234A (en) * | 2011-03-30 | 2012-08-01 | 中国石油化工集团公司 | High sulfur-containing gas well gas testing commissioning operation temporary plugging agent |
| CN102653673A (en) * | 2012-01-05 | 2012-09-05 | 中国石油天然气股份有限公司 | Biodegradable temporary plugging additive |
-
2020
- 2020-11-16 CN CN202011281289.0A patent/CN112457450A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092556A (en) * | 2006-06-23 | 2007-12-26 | 中国石油天然气股份有限公司 | Oil soluble cationic broad-spectrum temporary blocking agent in use for drilling fluid |
| CN102061152A (en) * | 2009-11-11 | 2011-05-18 | 中国石油天然气股份有限公司 | High-strength controllable gelout chemical temporary plugging liquid rubber stopper |
| CN102618234A (en) * | 2011-03-30 | 2012-08-01 | 中国石油化工集团公司 | High sulfur-containing gas well gas testing commissioning operation temporary plugging agent |
| CN102653673A (en) * | 2012-01-05 | 2012-09-05 | 中国石油天然气股份有限公司 | Biodegradable temporary plugging additive |
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