CN113150759A - Chemical blocking remover for oil field water injection well - Google Patents
Chemical blocking remover for oil field water injection well Download PDFInfo
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- CN113150759A CN113150759A CN202110327265.2A CN202110327265A CN113150759A CN 113150759 A CN113150759 A CN 113150759A CN 202110327265 A CN202110327265 A CN 202110327265A CN 113150759 A CN113150759 A CN 113150759A
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- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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Abstract
The invention discloses a chemical blocking remover for an oil field water injection well in the field of chemical blocking removers, which consists of a front agent, a main agent and a rear agent, wherein the components and the mixture ratio are as follows in percentage by weight: the precursor consists of 12-17% of polymer degradation agent, 5-10% of solid oxidant and 85-90% of water; the main agent consists of 7-10% of hydrochloric acid, 2-4% of nitric acid, 3-5% of acetic acid, 3-6% of ethylene diamine tetraacetic acid, 3-5% of ammonium fluoride, 0.8-1.5% of glacial acetic acid, 1.0-2.0% of corrosion inhibitor, 3-5% of penetrating agent, 4-7% of bimetallic coupling agent and 85.5-77% of water; the post-agent consists of 1-3% of organic phosphonic acid, 0.5-1% of hexamethylenetetramine, 0.5-1.5% of bactericide, 1-6% of active agent, 2-5% of rock stratum protective agent and 90-96.0% of water. The blocking remover consists of a front agent, a main agent and a rear agent, and has the characteristics of good stability, low corrosivity, wide application range, safe use and the like.
Description
Technical Field
The invention relates to the field of chemical blocking remover, in particular to a chemical blocking remover for an oil field water injection well.
Background
In recent years, with the continuous shortage of world energy and the continuous development of petroleum industry, the tertiary oil recovery technology gradually draws attention of people and makes great progress, and polymer flooding becomes one of the tertiary oil recovery methods with development potential at home and abroad at present due to the characteristics of simple technology, large range of crude oil recovery rate improvement, good economic benefit and the like. But under the action of stratum adsorption, mechanical trapping and the like and the influence of stratum clay expansion and particle migration, polymers are easy to be detained in a porous medium, so that the flow cross section of a pore passage is reduced, the flow resistance is increased, and the permeability is reduced. The polymer is easy to block the stratum due to incomplete dissolution, incompatibility of molecular weight and the pore throat radius of the stratum, denaturation of the polymer solution caused by the influence of the pH, temperature, salinity and shearing force of the stratum and the like. Meanwhile, the polymer injection well is easy to be blocked due to various reasons such as formation water property, liquid preparation water quality, injection preparation process and the like. Reservoir plugging has been a commonly encountered problem in polymer flooding oilfield development.
Aiming at the problem, the blockage removing agent is an effective method for removing the blockage of the oil field water injection well, which is recognized at home and abroad at present. However, the existing blocking remover has poor blocking removing effect, is easy to cause blocking to occur again, has small application range and has certain limitation in use. Therefore, the chemical blocking remover for the water injection well in the oil field is provided.
Disclosure of Invention
The invention aims to provide a chemical blocking remover for an oil field water injection well, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the chemical blocking remover for the water injection well in the oil field is characterized in that: the chemical blocking remover consists of a front agent, a main agent and a rear agent, and the components and the mixture ratio are as follows by weight percent:
the precursor consists of 12-17% of polymer degradation agent, 5-10% of solid oxidant and 85-90% of water;
the main agent consists of 7-10% of hydrochloric acid, 2-4% of nitric acid, 3-5% of acetic acid, 3-6% of ethylene diamine tetraacetic acid, 3-5% of ammonium fluoride, 0.8-1.5% of glacial acetic acid, 1.0-2.0% of corrosion inhibitor, 3-5% of penetrating agent, 4-7% of bimetallic coupling agent and 85.5-77% of water;
the post-agent consists of 1-3% of organic phosphonic acid, 0.5-1% of hexamethylenetetramine, 0.5-1.5% of bactericide, 1-6% of active agent, 2-5% of rock stratum protective agent and 90-96.0% of water.
Further, the polymer degradation agent is composed of sodium percarbonate and sodium perborate, and the ratio of the sodium percarbonate to the sodium perborate is 6-9: 1, the solid oxidant is sodium peroxycarbonate.
Further, the corrosion inhibitor IS one or more of organic amide corrosion inhibitors, imidazoline derivative corrosion inhibitors, IS-129 and propiolic alcohol mixtures.
Further, the penetrating agent is one or more of cetyl alcohol polyoxyethylene ether, ceteareth, polyether and polyoxyethylene ether phosphate, and the bimetallic coupling agent is methacrylic acid zirconium aluminate and aminobenzene sulfonic acid zirconium aluminate.
Further, the organic phosphonic acid is one or more of hydroxyethylidene diphosphonic acid and diethylenetriamine pentamethylene phosphonic acid.
Further, the bactericide is one or more of dioctadecyl quaternary ammonium salt, ethyl (1-hexadecyl) dimethyl ammonium bromide and hexadecyl trimethyl ammonium chloride.
The active agent is a mixture of a fluorine-containing high-activity cleanup additive, OP-10 and a penetrating agent T, and the mass parts of the active agent are that the fluorine-containing high-activity cleanup additive is OP-10 and the penetrating agent T is 0.3: 0.6-1: 0.3-2.
Further, the rock formation protective agent is one or more of azobisisobutyrimidazoline hydrochloride, cetyl pyridinium bromide, 2-chloromethyl imidazoline hydrochloride and 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt.
Compared with the prior art, the invention has the beneficial effects that: the blocking remover consists of a front agent, a main agent and a rear agent, wherein an aqueous solution prepared from a polymer degrading agent, a solid oxidant and water in the front agent can effectively remove the winding of polymer molecule groups, hydrochloric acid, nitric acid, acetic acid, ethylene diamine tetraacetic acid, ammonium fluoride and the like in the main agent can effectively dissolve inorganic solid-phase scaling particles and corrosion minerals (including sand grains), meanwhile, a corrosion inhibitor, a penetrating agent and a bimetallic coupling agent are arranged in the main agent, the penetrating agent is used for removing and breaking oil stains in a blocking object to play an auxiliary role in degrading polymers, so that the blocking of an oil field water injection well is effectively removed, the adopted bimetallic coupling agent has obvious effects of modifying, dispersing and reducing viscosity, the rear agent is provided with organic phosphonic acid to complex and disperse metal ions to prevent the blocking agent from precipitating and scaling again with a subsequent ternary injection solution, and the rear agent is also provided with a bactericide, an active agent and a stratum protecting agent to reduce the damage of the blocking remover to the oil field water injection well, the blocking remover plays a role in protecting the blocking remover, so the blocking remover has the characteristics of good stability, low corrosivity, wide application range, safety in use and the like.
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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the invention provides a chemical blocking remover for an oil field water injection well, which consists of a front agent, a main agent and a rear agent, wherein the components and the mixture ratio are as follows by weight percent:
the precursor consists of 12 percent of polymer degradation agent, 5 percent of solid oxidant and 85 percent of water;
the main agent consists of 7 percent of hydrochloric acid, 2 percent of nitric acid, 3 percent of acetic acid, 3 percent of ethylene diamine tetraacetic acid, 3 percent of ammonium fluoride, 0.8 percent of glacial acetic acid, 1.0 percent of corrosion inhibitor, 3 percent of penetrating agent, 4 percent of bimetallic coupling agent and 85.5 percent of water;
the post-agent consists of 1 percent of organic phosphonic acid, 0.5 percent of hexamethylene tetramine, 0.5 percent of bactericide, 1 percent of active agent, 2 percent of rock formation protective agent and 90 percent of water.
The polymer degradation agent consists of sodium percarbonate and sodium perborate, and the proportion of the sodium percarbonate and the sodium perborate is 6: 1, the solid oxidant is sodium peroxycarbonate.
The corrosion inhibitor IS one or more of organic amide corrosion inhibitors, imidazoline derivative corrosion inhibitors, IS-129 and propiolic alcohol mixtures.
The penetrant is one or more of cetyl alcohol polyoxyethylene ether, ceteareth, polyether and polyoxyethylene ether phosphate, and the bimetallic coupling agent is methacrylic acid zirconium aluminate and aminobenzene sulfonic acid zirconium aluminate.
The organic phosphonic acid is one or more of hydroxyethylidene diphosphonic acid and diethylenetriamine pentamethylene phosphonic acid.
The bactericide is one or more of dioctadecyl quaternary ammonium salt, ethyl (1-hexadecyl) dimethyl ammonium bromide and hexadecyl trimethyl ammonium chloride.
The active agent is a mixture of a fluorine-containing high-activity cleanup additive, OP-10 and a penetrating agent T, and the mass parts of the active agent are that the fluorine-containing high-activity cleanup additive is OP-10 and the penetrating agent T is 0.3: 0.6-1: 0.3-2.
The rock formation protective agent is one or more of azodiisobutyl imidazoline hydrochloride, cetyl pyridinium bromide, 2-chloromethyl imidazoline hydrochloride and 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt.
Example two:
the invention provides a chemical blocking remover for an oil field water injection well, which consists of a front agent, a main agent and a rear agent, wherein the components and the mixture ratio are as follows by weight percent:
the precursor consists of 15 percent of polymer degradation agent, 8 percent of solid oxidant and 87 percent of water;
the main agent consists of 8 percent of hydrochloric acid, 3 percent of nitric acid, 4 percent of acetic acid, 5 percent of ethylene diamine tetraacetic acid, 4 percent of ammonium fluoride, 1 percent of glacial acetic acid, 1.5 percent of corrosion inhibitor, 4 percent of penetrating agent, 5 percent of bimetallic coupling agent and 82 percent of water;
the post-agent consists of 2 percent of organic phosphonic acid, 0.5 percent of hexamethylene tetramine, 1.3 percent of bactericide, 5 percent of active agent, 3 percent of formation protective agent and 92 percent of water.
The polymer degradation agent consists of sodium percarbonate and sodium perborate, and the proportion of the sodium percarbonate to the sodium perborate is 8: 1, the solid oxidant is sodium peroxycarbonate.
The corrosion inhibitor IS one or more of organic amide corrosion inhibitors, imidazoline derivative corrosion inhibitors, IS-129 and propiolic alcohol mixtures.
The penetrant is one or more of cetyl alcohol polyoxyethylene ether, ceteareth, polyether and polyoxyethylene ether phosphate, and the bimetallic coupling agent is methacrylic acid zirconium aluminate and aminobenzene sulfonic acid zirconium aluminate.
The organic phosphonic acid is one or more of hydroxyethylidene diphosphonic acid and diethylenetriamine pentamethylene phosphonic acid.
The bactericide is one or more of dioctadecyl quaternary ammonium salt, ethyl (1-hexadecyl) dimethyl ammonium bromide and hexadecyl trimethyl ammonium chloride.
The active agent is a mixture of a fluorine-containing high-activity cleanup additive, OP-10 and a penetrating agent T, and the mass parts of the active agent are that the fluorine-containing high-activity cleanup additive is OP-10 and the penetrating agent T is 0.3: 0.6-1: 0.3-2.
The rock formation protective agent is one or more of azodiisobutyl imidazoline hydrochloride, cetyl pyridinium bromide, 2-chloromethyl imidazoline hydrochloride and 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt
Example three:
the invention provides a chemical blocking remover for an oil field water injection well, which consists of a front agent, a main agent and a rear agent, wherein the components and the mixture ratio are as follows by weight percent:
the precursor consists of 17 percent of polymer degradation agent, 10 percent of solid oxidant and 90 percent of water;
the main agent consists of 10 percent of hydrochloric acid, 4 percent of nitric acid, 5 percent of acetic acid, 6 percent of ethylene diamine tetraacetic acid, 5 percent of ammonium fluoride, 1.5 percent of glacial acetic acid, 2.0 percent of corrosion inhibitor, 5 percent of penetrating agent, 7 percent of bimetallic coupling agent and 77 percent of water;
the post-agent consists of 3% of organic phosphonic acid, 1% of hexamethylenetetramine, 1.5% of bactericide, 6% of active agent, 5% of rock formation protective agent and 96% of water.
The polymer degradation agent consists of sodium percarbonate and sodium perborate, and the proportion of the sodium percarbonate and the sodium perborate is 9: 1, the solid oxidant is sodium peroxycarbonate.
The corrosion inhibitor IS one or more of organic amide corrosion inhibitors, imidazoline derivative corrosion inhibitors, IS-129 and propiolic alcohol mixtures.
The penetrant is one or more of cetyl alcohol polyoxyethylene ether, ceteareth, polyether and polyoxyethylene ether phosphate, and the bimetallic coupling agent is methacrylic acid zirconium aluminate and aminobenzene sulfonic acid zirconium aluminate.
The organic phosphonic acid is one or more of hydroxyethylidene diphosphonic acid and diethylenetriamine pentamethylene phosphonic acid.
The bactericide is one or more of dioctadecyl quaternary ammonium salt, ethyl (1-hexadecyl) dimethyl ammonium bromide and hexadecyl trimethyl ammonium chloride.
The active agent is a mixture of a fluorine-containing high-activity cleanup additive, OP-10 and a penetrating agent T, and the mass parts of the active agent are that the fluorine-containing high-activity cleanup additive is OP-10 and the penetrating agent T is 0.3: 0.6-1: 0.3-2.
The rock formation protective agent is one or more of azodiisobutyl imidazoline hydrochloride, cetyl pyridinium bromide, 2-chloromethyl imidazoline hydrochloride and 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification, the specific connection mode of each part adopts conventional means such as mature bolts, rivets, welding and the like in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The chemical blocking remover for the water injection well in the oil field is characterized in that: the chemical blocking remover consists of a front agent, a main agent and a rear agent, and the components and the mixture ratio are as follows by weight percent:
the precursor consists of 12-17% of polymer degradation agent, 5-10% of solid oxidant and 85-90% of water;
the main agent consists of 7-10% of hydrochloric acid, 2-4% of nitric acid, 3-5% of acetic acid, 3-6% of ethylene diamine tetraacetic acid, 3-5% of ammonium fluoride, 0.8-1.5% of glacial acetic acid, 1.0-2.0% of corrosion inhibitor, 3-5% of penetrating agent, 4-7% of bimetallic coupling agent and 85.5-77% of water;
the post-agent consists of 1-3% of organic phosphonic acid, 0.5-1% of hexamethylenetetramine, 0.5-1.5% of bactericide, 1-6% of active agent, 2-5% of rock stratum protective agent and 90-96.0% of water.
2. The chemical blocking remover for the oilfield water injection well according to claim 1, wherein the chemical blocking remover comprises the following components in percentage by weight: the polymer degradation agent consists of sodium percarbonate and sodium perborate, and the proportion of the sodium percarbonate to the sodium perborate is 6-9: 1, the solid oxidant is sodium peroxycarbonate.
3. The chemical blocking remover for the oilfield water injection well according to claim 1, wherein the chemical blocking remover comprises the following components in percentage by weight: the corrosion inhibitor IS one or more of organic amide corrosion inhibitors, imidazoline derivative corrosion inhibitors, IS-129 and propiolic alcohol mixtures.
4. The chemical blocking remover for the oilfield water injection well according to claim 1, wherein the chemical blocking remover comprises the following components in percentage by weight: the penetrant is one or more of cetyl alcohol polyoxyethylene ether, ceteareth, polyether and polyoxyethylene ether phosphate, and the bimetallic coupling agent is methacrylic acid zirconium aluminate and aminobenzene sulfonic acid zirconium aluminate.
5. The chemical blocking remover for the oilfield water injection well according to claim 1, wherein the chemical blocking remover comprises the following components in percentage by weight: the organic phosphonic acid is one or more of hydroxyethylidene diphosphonic acid and diethylenetriamine pentamethylene phosphonic acid.
6. The chemical blocking remover for the oilfield water injection well according to claim 1, wherein the chemical blocking remover comprises the following components in percentage by weight: the bactericide is one or more of dioctadecyl quaternary ammonium salt, ethyl (1-hexadecyl) dimethyl ammonium bromide and hexadecyl trimethyl ammonium chloride.
7. The chemical blocking remover for the oilfield water injection well according to claim 1, wherein the chemical blocking remover comprises the following components in percentage by weight: the active agent is a mixture of a fluorine-containing high-activity cleanup additive, OP-10 and a penetrating agent T, and the mass parts of the active agent are that the fluorine-containing high-activity cleanup additive is OP-10 and the penetrating agent T is 0.3: 0.6-1: 0.3-2.
8. The chemical blocking remover for the oilfield water injection well according to claim 1, wherein the chemical blocking remover comprises the following components in percentage by weight: the rock formation protective agent is one or more of azodiisobutyl imidazoline hydrochloride, cetyl pyridinium bromide, 2-chloromethyl imidazoline hydrochloride and 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt.
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| CN202110327265.2A CN113150759A (en) | 2021-03-26 | 2021-03-26 | Chemical blocking remover for oil field water injection well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110327265.2A CN113150759A (en) | 2021-03-26 | 2021-03-26 | Chemical blocking remover for oil field water injection well |
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| CN113150759A true CN113150759A (en) | 2021-07-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114716989A (en) * | 2022-04-28 | 2022-07-08 | 西安道坦石油技术服务有限公司 | Polyacrylamide profile control, flooding control weak gel composite blocking remover for low-permeability oilfield water injection well and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925128A (en) * | 2012-11-05 | 2013-02-13 | 中国海洋石油总公司 | Compound chemical blocking removing agent of oil field polymer injection well |
| CN104830298A (en) * | 2015-04-03 | 2015-08-12 | 湖北汉科新技术股份有限公司 | Water-based emulsion composite blocking remover |
| CN109652043A (en) * | 2019-02-18 | 2019-04-19 | 大庆井升伟业油田技术服务有限公司 | One kind being suitable for the chemical plugging removal agent of tri compound drive injection well |
-
2021
- 2021-03-26 CN CN202110327265.2A patent/CN113150759A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925128A (en) * | 2012-11-05 | 2013-02-13 | 中国海洋石油总公司 | Compound chemical blocking removing agent of oil field polymer injection well |
| CN104830298A (en) * | 2015-04-03 | 2015-08-12 | 湖北汉科新技术股份有限公司 | Water-based emulsion composite blocking remover |
| CN109652043A (en) * | 2019-02-18 | 2019-04-19 | 大庆井升伟业油田技术服务有限公司 | One kind being suitable for the chemical plugging removal agent of tri compound drive injection well |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114716989A (en) * | 2022-04-28 | 2022-07-08 | 西安道坦石油技术服务有限公司 | Polyacrylamide profile control, flooding control weak gel composite blocking remover for low-permeability oilfield water injection well and preparation method and application thereof |
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