CN111394076A - Preparation method of profile control and flooding agent with efficient plugging effect for low-permeability reservoir - Google Patents
Preparation method of profile control and flooding agent with efficient plugging effect for low-permeability reservoir Download PDFInfo
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- 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
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- 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
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
Abstract
The invention discloses a preparation method of a profile control agent for a low-permeability reservoir with an efficient plugging effect, which belongs to the technical field of profile control agents and comprises the following raw materials in parts by weight: 40-55 parts of water, 0.1-3.5 parts of a cross-linking agent, 3.5-7.5 parts of acrylic acid, 3-5 parts of nano calcium carbonate, 0.1-0.5 part of resorcinol, 30-43 parts of anionic polyacrylamide, 2.1-3.5 parts of thiourea, 0.5-2.2 parts of divalent cobalt salt, 0.5-1.0 part of modified starch, 0.8-1.0 part of cyclohexylamine, 0.5-3.0 parts of a high-temperature antioxidant, 3.0-4.0 parts of melamine cyanurate and 0.1-3.5 parts of formaldehyde. According to the invention, the surface density of the profile control agent is increased by adding the nano calcium carbonate, and when water contacts with the profile control agent, the water slides from the surface of the profile control agent and cannot be fused with the profile control agent, so that the plugging performance of the profile control agent is improved.
Description
Technical Field
The invention relates to the technical field of profile control and flooding agents, in particular to a preparation method of a profile control and flooding agent for a low-permeability reservoir with a high-efficiency plugging effect.
Background
With the deepening of low-permeability exploration and development in China, the proportion of old oil zones is increased year by year, and the problem of water channeling and flooding becomes a task which needs to be solved urgently in the water drive development of the low-permeability old oil zones. The profile control and profile control is a main method adopted for treating water channeling and flooding at home and abroad. Typical fractured low permeability reservoirs are part of the oil zones of the triple extension group and the extended release group of the Changqing oil field and the extended oil field Ordos basin. Because the oil zones are buried shallowly, natural cracks in reservoirs are developed widely, the initial yield is high after fracturing production, but the productivity is reduced rapidly, oil wells in partial areas are flooded by water in ten years after production, the production degree is less than 10%, and the potential of residual oil excavation is high. Due to the particularity of complex channeling passages of fractured low-permeability reservoirs, the deep profile control and flooding agent of conventional gels, particles and the like has the characteristics of high initial viscosity, poor injection performance, difficult migration capability in fractures and the like, is difficult to effectively and deeply block complex channeling passages with different permeabilities, and causes the problems of high failure rate after the operation of the conventional profile control and flooding, such as 'no injection, no blocking, or full oil-water blocking'.
The existing profile control and flooding agent has poor waterproofness, is easy to fuse with water when meeting water and becomes thinner and thicker, so that the plugging effect of the profile control and flooding agent is influenced.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a preparation method of a profile control and flooding agent for a low-permeability reservoir with a high-efficiency plugging effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a profile control agent for a low-permeability reservoir with a high-efficiency plugging effect comprises the following steps,
s1, comprising the following raw materials in parts by weight: 40-55 parts of water, 0.1-3.5 parts of a cross-linking agent, 3.5-7.5 parts of acrylic acid, 3-5 parts of nano calcium carbonate, 0.1-0.5 part of resorcinol, 30-43 parts of anionic polyacrylamide, 2.1-3.5 parts of thiourea, 0.5-2.2 parts of divalent cobalt salt, 0.5-1.0 part of modified starch, 0.8-1.0 part of cyclohexylamine, 0.5-3.0 parts of a high-temperature antioxidant, 3.0-4.0 parts of melamine cyanurate and 0.1-3.5 parts of formaldehyde, wherein according to the production amount, the parts by weight of water and the anionic polyacrylamide are put into a reaction kettle, and the temperature is raised to 90-180 ℃ by stirring;
s2, adding the thiourea into the reaction kettle in parts by weight;
s3, stirring and cooling to 82-85 ℃, and stirring for 60-80 minutes at constant temperature within the temperature range to convert the materials in the reaction kettle into conversion substances of lipid-like sticky substances;
s4, putting the modified starch, the resorcinol, the cyclohexylamine and the formaldehyde in parts by weight into a reaction kettle, melting the modified starch under stirring, and uniformly mixing the melted modified starch with the product in the reaction kettle;
s5, preparing a divalent cobalt salt dissolving kettle, adding the divalent cobalt salt in parts by weight, and stirring until the divalent cobalt salt is melted and transparent; rapidly pumping the melted divalent cobalt salt into a feeding tank; slowly adding the mixture in the feeding tank into the reaction kettle under stirring;
s6, after the feeding is finished, reacting at a constant temperature of 105-110 ℃ for 20 minutes, and then heating the materials in the reaction kettle to 115-120 ℃ until 50% of water in the reaction kettle is removed;
s7, measuring and sequentially adding the cross-linking agent, the acrylic acid, the nano calcium carbonate, the high-temperature antioxidant and the melamine cyanurate in parts by weight, stirring and heating the materials in the reaction kettle to 130-150 ℃, and keeping the temperature for 20 minutes to obtain the profile control agent for the low-permeability reservoir with the efficient plugging effect.
Preferably, in the S3, the temperature is reduced to 84 ℃ by stirring, and the stirring is carried out for 70 minutes at constant temperature in the temperature range, so that the materials in the reaction kettle become the conversion products of the grease-like sticky substances.
Preferably, in the S6, after the feeding is completed, the reaction is carried out for 20 minutes at a constant temperature of 108 ℃, and then the temperature of the materials in the reaction kettle is increased to 117 ℃ until 50% of water in the reaction kettle is removed.
Preferably, the crosslinking agent is an epoxy organic crosslinking agent.
Preferably, the feed comprises the following raw materials in parts by weight: 40 parts of water, 0.1 part of cross-linking agent, 3.5 parts of acrylic acid, 3 parts of nano calcium carbonate, 0.1 part of resorcinol, 30 parts of anionic polyacrylamide, 2.1 parts of thiourea, 0.5 part of divalent cobalt salt, 0.5 part of modified starch, 0.8 part of cyclohexylamine, 0.5 part of high-temperature antioxidant, 3.0 parts of melamine cyanurate and 0.1 part of formaldehyde.
Preferably, the feed comprises the following raw materials in parts by weight: 47 parts of water, 1.1 parts of cross-linking agent, 4.5 parts of acrylic acid, 4 parts of nano calcium carbonate, 0.25 part of resorcinol, 35 parts of anionic polyacrylamide, 2.7 parts of thiourea, 0.9 part of divalent cobalt salt, 0.8 part of modified starch, 0.9 part of cyclohexylamine, 1.5 parts of high-temperature antioxidant, 3.3 parts of melamine cyanurate and 0.8 part of formaldehyde.
Preferably, the feed comprises the following raw materials in parts by weight: 55 parts of water, 3.5 parts of cross-linking agent, 7.5 parts of acrylic acid, 5 parts of nano calcium carbonate, 0.5 part of resorcinol, 43 parts of anionic polyacrylamide, 3.5 parts of thiourea, 2.2 parts of divalent cobalt salt, 1.0 part of modified starch, 1.0 part of cyclohexylamine, 3.0 parts of high-temperature antioxidant, 4.0 parts of melamine cyanurate and 3.5 parts of formaldehyde.
Compared with the prior art, the invention has the beneficial effects that: the surface density of the profile control agent is increased by adding the nano calcium carbonate, when water is contacted with the profile control agent, the water slides from the surface of the profile control agent and cannot be fused with the profile control agent, so that the plugging performance of the profile control agent is improved, the plugging performance of the profile control agent can be further improved by using the anionic polyacrylamide, the application range and the service life of the profile control agent are improved, the anti-oxidation capability of the profile control agent can be improved by using a high-temperature antioxidant, the service life of the profile control agent is prolonged, the profile control agent is suitable for popularization and use, and the problems that when the profile control construction in the existing low-permeability high water-cut period is carried out, a conventional agent is 'not injected into an oil reservoir, or is not blocked, or is completely blocked by oil water' and the like.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example one
The preparation method of the profile control agent for low-permeability oil reservoir with high-efficiency plugging effect comprises the following steps,
s1, comprising the following raw materials in parts by weight: 40 parts of water, 0.1 part of cross-linking agent, 3.5 parts of acrylic acid, 3 parts of nano calcium carbonate, 0.1 part of resorcinol, 30 parts of anionic polyacrylamide, 2.1 parts of thiourea, 0.5 part of divalent cobalt salt, 0.5 part of modified starch, 0.8 part of cyclohexylamine, 0.5 part of high-temperature antioxidant, 3.0 parts of melamine cyanurate and 0.1 part of formaldehyde, wherein according to the production amount, the water and the anionic polyacrylamide are added into a reaction kettle in parts by weight, and the temperature is raised to 90 ℃ by stirring;
s2, adding the thiourea into the reaction kettle in parts by weight;
s3, stirring and cooling to 82 ℃, and stirring for 60 minutes at constant temperature within the temperature range to convert the materials in the reaction kettle into conversion products of grease-like sticky substances;
s4, putting the modified starch, the resorcinol, the cyclohexylamine and the formaldehyde in parts by weight into a reaction kettle, melting the modified starch under stirring, and uniformly mixing the melted modified starch with the product in the reaction kettle;
s5, preparing a divalent cobalt salt dissolving kettle, adding the divalent cobalt salt in parts by weight, and stirring until the divalent cobalt salt is melted and transparent; rapidly pumping the melted divalent cobalt salt into a feeding tank; slowly adding the mixture in the feeding tank into the reaction kettle under stirring;
s6, after the feeding is finished, reacting at a constant temperature of 105 ℃ for 20 minutes, and then heating the materials in the reaction kettle to 115 ℃ until 50% of water in the reaction kettle is removed;
s7, measuring and sequentially adding the cross-linking agent, the acrylic acid, the nano calcium carbonate, the high-temperature antioxidant and the melamine cyanurate in parts by weight, stirring and heating the materials in the reaction kettle to 130 ℃, and keeping the temperature for 20 minutes to obtain the profile control and flooding agent for the low-permeability oil reservoir with the efficient plugging effect.
Example two
The preparation method of the profile control agent for low-permeability oil reservoir with high-efficiency plugging effect comprises the following steps,
s1, comprising the following raw materials in parts by weight: 47 parts of water, 1.1 parts of cross-linking agent, 4.5 parts of acrylic acid, 4 parts of nano calcium carbonate, 0.25 part of resorcinol, 35 parts of anionic polyacrylamide, 2.7 parts of thiourea, 0.9 part of divalent cobalt salt, 0.8 part of modified starch, 0.9 part of cyclohexylamine, 1.5 parts of high-temperature antioxidant, 3.3 parts of melamine cyanurate and 0.8 part of formaldehyde, wherein according to the production amount, the water and the anionic polyacrylamide are added into a reaction kettle in parts by weight, and the mixture is stirred and heated to 77 ℃;
s2, adding the thiourea into the reaction kettle in parts by weight;
s3, stirring and cooling to 84 ℃, and stirring for 70 minutes at constant temperature within the temperature range to convert the materials in the reaction kettle into conversion products of grease-like sticky substances;
s4, putting the modified starch, the resorcinol, the cyclohexylamine and the formaldehyde in parts by weight into a reaction kettle, melting the modified starch under stirring, and uniformly mixing the melted modified starch with the product in the reaction kettle;
s5, preparing a divalent cobalt salt dissolving kettle, adding the divalent cobalt salt in parts by weight, and stirring until the divalent cobalt salt is melted and transparent; rapidly pumping the melted divalent cobalt salt into a feeding tank; slowly adding the mixture in the feeding tank into the reaction kettle under stirring;
s6, after the feeding is finished, reacting for 20 minutes at a constant temperature of 108 ℃, and then heating the materials in the reaction kettle to 118 ℃ until 50% of water in the reaction kettle is removed;
s7, measuring and sequentially adding the cross-linking agent, the acrylic acid, the nano calcium carbonate, the high-temperature antioxidant and the melamine cyanurate in parts by weight, stirring the materials in the reaction kettle, heating to 140 ℃, and keeping the temperature for 20 minutes to obtain the profile control agent for the low-permeability oil reservoir with the efficient plugging effect.
EXAMPLE III
The preparation method of the profile control agent for low-permeability oil reservoir with high-efficiency plugging effect comprises the following steps,
s1, comprising the following raw materials in parts by weight: 55 parts of water, 3.5 parts of cross-linking agent, 7.5 parts of acrylic acid, 5 parts of nano calcium carbonate, 0.5 part of resorcinol, 43 parts of anionic polyacrylamide, 3.5 parts of thiourea, 2.2 parts of divalent cobalt salt, 1.0 part of modified starch, 1.0 part of cyclohexylamine, 3.0 parts of high-temperature antioxidant, 4.0 parts of melamine cyanurate and 3.5 parts of formaldehyde, wherein according to the production amount, the water and the anionic polyacrylamide are added into a reaction kettle in parts by weight, and the mixture is stirred and heated to 80 ℃;
s2, adding the thiourea into the reaction kettle in parts by weight;
s3, stirring and cooling to 85 ℃, and stirring for 80 minutes at constant temperature within the temperature range to convert the materials in the reaction kettle into conversion products of grease-like sticky substances;
s4, putting the modified starch, the resorcinol, the cyclohexylamine and the formaldehyde in parts by weight into a reaction kettle, melting the modified starch under stirring, and uniformly mixing the melted modified starch with the product in the reaction kettle;
s5, preparing a divalent cobalt salt dissolving kettle, adding the divalent cobalt salt in parts by weight, and stirring until the divalent cobalt salt is melted and transparent; rapidly pumping the melted divalent cobalt salt into a feeding tank; slowly adding the mixture in the feeding tank into the reaction kettle under stirring;
s6, after the feeding is finished, reacting for 20 minutes at a constant temperature of 110 ℃, and then heating the materials in the reaction kettle to 120 ℃ until 50% of water in the reaction kettle is removed;
s7, measuring and sequentially adding the cross-linking agent, the acrylic acid, the nano calcium carbonate, the high-temperature antioxidant and the melamine cyanurate in parts by weight, stirring the materials in the reaction kettle, heating to 150 ℃, and keeping the temperature for 20 minutes to obtain the profile control agent for the low-permeability oil reservoir with the efficient plugging effect.
The results of the analysis of the physical and chemical properties of the finished products obtained in examples 1, 2 and 3 and of the two products currently on the market are shown in table 1.
According to the invention, the surface density of the profile control agent is increased by adding the nano calcium carbonate, when water contacts with the profile control agent, the water slides from the surface of the profile control agent and cannot be fused with the profile control agent, so that the plugging performance of the profile control agent is improved, the plugging performance of the profile control agent can be further improved by using the anionic polyacrylamide, the application range and the service life of the profile control agent are improved, the anti-oxidation capability of the profile control agent can be improved by using the high-temperature antioxidant, the service life of the profile control agent is prolonged, the profile control agent is suitable for popularization and use, and the problems that the conventional agent is not injected into an oil reservoir, is not blocked, is completely blocked by oil water and the like in the existing profile control and flooding construction in a low-permeability high-water-containing period are solved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A preparation method of a profile control agent for a low-permeability reservoir with a high-efficiency plugging effect is characterized by comprising the following steps,
s1, comprising the following raw materials in parts by weight: 40-55 parts of water, 0.1-3.5 parts of a cross-linking agent, 3.5-7.5 parts of acrylic acid, 3-5 parts of nano calcium carbonate, 0.1-0.5 part of resorcinol, 30-43 parts of anionic polyacrylamide, 2.1-3.5 parts of thiourea, 0.5-2.2 parts of divalent cobalt salt, 0.5-1.0 part of modified starch, 0.8-1.0 part of cyclohexylamine, 0.5-3.0 parts of a high-temperature antioxidant, 3.0-4.0 parts of melamine cyanurate and 0.1-3.5 parts of formaldehyde, wherein according to the production amount, the parts by weight of water and the anionic polyacrylamide are put into a reaction kettle, and the temperature is raised to 90-180 ℃ by stirring;
s2, adding the thiourea into the reaction kettle in parts by weight;
s3, stirring and cooling to 82-85 ℃, and stirring for 60-80 minutes at constant temperature within the temperature range to convert the materials in the reaction kettle into conversion substances of lipid-like sticky substances;
s4, putting the modified starch, the resorcinol, the cyclohexylamine and the formaldehyde in parts by weight into a reaction kettle, melting the modified starch under stirring, and uniformly mixing the melted modified starch with the product in the reaction kettle;
s5, preparing a divalent cobalt salt dissolving kettle, adding the divalent cobalt salt in parts by weight, and stirring until the divalent cobalt salt is melted and transparent; rapidly pumping the melted divalent cobalt salt into a feeding tank; slowly adding the mixture in the feeding tank into the reaction kettle under stirring;
s6, after the feeding is finished, reacting at a constant temperature of 105-110 ℃ for 20 minutes, and then heating the materials in the reaction kettle to 115-120 ℃ until 50% of water in the reaction kettle is removed;
s7, measuring and sequentially adding the cross-linking agent, the acrylic acid, the nano calcium carbonate, the high-temperature antioxidant and the melamine cyanurate in parts by weight, stirring and heating the materials in the reaction kettle to 130-150 ℃, and keeping the temperature for 20 minutes to obtain the profile control agent for the low-permeability reservoir with the efficient plugging effect.
2. The preparation method of the profile control agent for low-permeability reservoirs with high-efficiency plugging effects as claimed in claim 1, wherein in S3, the temperature is reduced to 84 ℃ by stirring, and the mixture is stirred for 70 minutes at constant temperature in the temperature range, so that the materials in the reaction kettle are changed into a conversion product of lipid-like sticky substances.
3. The method for preparing the profile control agent for low-permeability reservoirs with high-efficiency plugging effects as claimed in claim 1, wherein in S6, after the completion of the feeding, the constant temperature reaction is carried out for 20 minutes at 108 ℃, and then the temperature of the materials in the reaction kettle is raised to 117 ℃ until 50% of water in the reaction kettle is removed.
4. The preparation method of the profile control agent for low-permeability reservoirs with high-efficiency plugging effects as claimed in claim 1, wherein the cross-linking agent is an epoxy organic cross-linking agent.
5. The preparation method of the profile control agent for low-permeability oil reservoirs with high-efficiency plugging effects, which is characterized by comprising the following raw materials in parts by weight: 40 parts of water, 0.1 part of cross-linking agent, 3.5 parts of acrylic acid, 3 parts of nano calcium carbonate, 0.1 part of resorcinol, 30 parts of anionic polyacrylamide, 2.1 parts of thiourea, 0.5 part of divalent cobalt salt, 0.5 part of modified starch, 0.8 part of cyclohexylamine, 0.5 part of high-temperature antioxidant, 3.0 parts of melamine cyanurate and 0.1 part of formaldehyde.
6. The preparation method of the profile control agent for low-permeability oil reservoirs with high-efficiency plugging effects, which is characterized by comprising the following raw materials in parts by weight: 47 parts of water, 1.1 parts of cross-linking agent, 4.5 parts of acrylic acid, 4 parts of nano calcium carbonate, 0.25 part of resorcinol, 35 parts of anionic polyacrylamide, 2.7 parts of thiourea, 0.9 part of divalent cobalt salt, 0.8 part of modified starch, 0.9 part of cyclohexylamine, 1.5 parts of high-temperature antioxidant, 3.3 parts of melamine cyanurate and 0.8 part of formaldehyde.
7. The preparation method of the profile control agent for low-permeability oil reservoirs with high-efficiency plugging effects, which is characterized by comprising the following raw materials in parts by weight: 55 parts of water, 3.5 parts of cross-linking agent, 7.5 parts of acrylic acid, 5 parts of nano calcium carbonate, 0.5 part of resorcinol, 43 parts of anionic polyacrylamide, 3.5 parts of thiourea, 2.2 parts of divalent cobalt salt, 1.0 part of modified starch, 1.0 part of cyclohexylamine, 3.0 parts of high-temperature antioxidant, 4.0 parts of melamine cyanurate and 3.5 parts of formaldehyde.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150353831A1 (en) * | 2013-01-22 | 2015-12-10 | Fluorchemie Gmbh Frankfurt | Modified carbonized red mud |
| CN106947450A (en) * | 2017-03-10 | 2017-07-14 | 中国石油化工股份有限公司 | A kind of in-depth profile control with low initial viscosity and preparation method thereof |
| CN109439306A (en) * | 2018-12-24 | 2019-03-08 | 陕西明德石油科技有限公司 | Extra permeability oilfield selectivity Application of weak gel profile agent |
| CN109666470A (en) * | 2018-12-05 | 2019-04-23 | 延安中杰高新工贸有限公司 | A kind of compound profile-controlling and plugging agent of nano and micro materials |
| CN110591679A (en) * | 2019-10-16 | 2019-12-20 | 西南石油大学 | Granular profile control agent adaptive to size of pore throat of stratum and preparation method thereof |
-
2020
- 2020-04-24 CN CN202010332256.8A patent/CN111394076A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150353831A1 (en) * | 2013-01-22 | 2015-12-10 | Fluorchemie Gmbh Frankfurt | Modified carbonized red mud |
| CN106947450A (en) * | 2017-03-10 | 2017-07-14 | 中国石油化工股份有限公司 | A kind of in-depth profile control with low initial viscosity and preparation method thereof |
| CN109666470A (en) * | 2018-12-05 | 2019-04-23 | 延安中杰高新工贸有限公司 | A kind of compound profile-controlling and plugging agent of nano and micro materials |
| CN109439306A (en) * | 2018-12-24 | 2019-03-08 | 陕西明德石油科技有限公司 | Extra permeability oilfield selectivity Application of weak gel profile agent |
| CN110591679A (en) * | 2019-10-16 | 2019-12-20 | 西南石油大学 | Granular profile control agent adaptive to size of pore throat of stratum and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 邓奇根等: "《安全工程专业实验教程》", 30 April 2017, 中国矿业大学出版社 * |
| 陈刚等: "木质素磺酸盐Mannich碱钻井液处理剂的合成与性能研究", 《钻井液与完井液》 * |
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