CN115216283B - Temporary blocking steering agent and preparation method thereof - Google Patents
Temporary blocking steering agent and preparation method thereof Download PDFInfo
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- CN115216283B CN115216283B CN202210970592.4A CN202210970592A CN115216283B CN 115216283 B CN115216283 B CN 115216283B CN 202210970592 A CN202210970592 A CN 202210970592A CN 115216283 B CN115216283 B CN 115216283B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 230000000903 blocking effect Effects 0.000 title description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 83
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 50
- 239000004626 polylactic acid Substances 0.000 claims abstract description 50
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 37
- 229920002472 Starch Polymers 0.000 claims abstract description 35
- 235000019698 starch Nutrition 0.000 claims abstract description 35
- 239000008107 starch Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 12
- -1 ceramsite Polymers 0.000 claims description 10
- 229920002261 Corn starch Polymers 0.000 claims description 9
- 239000008120 corn starch Substances 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- AOJJSUZBOXZQNB-VTZDEGQISA-N 4'-epidoxorubicin Chemical compound O([C@H]1C[C@@](O)(CC=2C(O)=C3C(=O)C=4C=CC=C(C=4C(=O)C3=C(O)C=21)OC)C(=O)CO)[C@H]1C[C@H](N)[C@@H](O)[C@H](C)O1 AOJJSUZBOXZQNB-VTZDEGQISA-N 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 abstract description 6
- 239000000945 filler Substances 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 235000011187 glycerol Nutrition 0.000 description 28
- 230000000052 comparative effect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 240000003183 Manihot esculenta Species 0.000 description 2
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- 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
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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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
- 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
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
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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
- 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
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- 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
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
The invention provides a temporary plugging steering agent and a preparation method thereof, and belongs to the technical field of temporary plugging steering agents. The invention provides a temporary plugging steering agent which is prepared from the following raw materials in percentage by mass: 20-25% of polyacrylamide, 36-55% of polylactic acid, 5-10% of ceramsite, 10-15% of starch and 5-15% of glycerol. According to the invention, polyacrylamide and polylactic acid are used as framework materials, and the intensity of the temporary plugging steering agent is synergistically improved by regulating and controlling the dosage of the polyacrylamide and the polylactic acid, so that the bearing capacity is improved; the ceramsite is used as the propping agent, so that the pressure bearing capacity of the temporary plugging steering agent is further improved; the starch is used as a filler, and the glycerol can improve the compatibility of polylactic acid and starch, so that the pressure bearing capacity of the temporary plugging steering agent is further improved. Experimental results show that the bearing capacity of the temporary plugging steering agent provided by the invention reaches more than 58 MPa.
Description
Technical Field
The invention relates to the technical field of temporary plugging steering agents, in particular to a temporary plugging steering agent and a preparation method thereof.
Background
With the continuous deep exploration and development of oil and gas fields, the temporary plugging steering technology becomes a hot spot technology in reservoir transformation, and is successfully applied to the fields of old well repeated fracturing, horizontal well staged fracturing, vertical well staged fracturing and the like. The temporary plugging steering agent is used as one of the key points of the temporary plugging steering technology, and the development of the temporary plugging material with good plugging effect, low construction cost, convenient construction and controllable dissolution has important significance for the implementation of the temporary plugging steering technology.
At present, the temporary plugging diverting agent is mainly a particle type temporary plugging diverting agent, and the particle type temporary plugging diverting agent is prepared by obtaining high-viscosity crosslinked liquid through crosslinking different materials, and then drying, shearing, granulating and other processes. When the cracks are plugged, the granular temporary plugging steering agent is mixed with clear water, and then pumped into the stratum through a pump truck to temporarily plug perforation holes. However, the granular temporary plugging steering agent has poor bearing strength, so that the plugging steering effect is poor. Therefore, how to improve the pressure bearing capacity of the temporary plugging steering agent is a problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a temporary plugging steering agent and a preparation method thereof. The temporary plugging steering agent provided by the invention has excellent pressure bearing capacity.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a temporary plugging steering agent which is prepared from the following raw materials in percentage by mass: 20-25% of polyacrylamide, 36-55% of polylactic acid, 5-10% of ceramsite, 10-15% of starch and 5-15% of glycerol.
Preferably, the material is prepared from the following raw materials in percentage by mass: 22-24% of polyacrylamide, 40-50% of polylactic acid, 6-8% of ceramsite, 12-14% of starch and 8-15% of glycerol.
Preferably, the material is prepared from the following raw materials in percentage by mass: 22-23% of polyacrylamide, 45-50% of polylactic acid, 6-8% of ceramsite, 13-14% of starch and 9-10% of glycerol.
Preferably, the molecular weight of the polylactic acid is 900-1100 ten thousand, and the melting point of the polylactic acid is 175 ℃.
Preferably, the particle size of the ceramsite is 50-100 meshes.
Preferably, the starch is corn starch and/or tapioca starch.
Preferably, the particle size of the temporary plugging steering agent is 100-200 meshes.
The invention also provides a preparation method of the temporary plugging diversion agent, which comprises the following steps:
(1) Mixing polyacrylamide, polylactic acid, ceramsite, starch and glycerol to obtain a mixed material;
(2) And (3) carrying out extrusion molding on the mixed material obtained in the step (1) to obtain the temporary plugging steering agent.
Preferably, the mixing time in the step (1) is 5-10 min.
Preferably, the mixing in step (1) is performed in a high-speed mixer.
The invention provides a temporary plugging steering agent which is prepared from the following raw materials in percentage by mass: 20-25% of polyacrylamide, 36-55% of polylactic acid, 5-10% of ceramsite, 10-15% of starch and 5-15% of glycerol. According to the invention, polyacrylamide and polylactic acid are used as framework materials, and the intensity of the temporary plugging steering agent is synergistically improved by regulating and controlling the dosage of the polyacrylamide and the polylactic acid, so that the bearing capacity is improved; the ceramsite is used as the propping agent, so that the pressure bearing capacity of the temporary plugging steering agent is further improved; the starch is used as a filler, and the glycerol can improve the compatibility of polylactic acid and starch, so that the pressure bearing capacity of the temporary plugging steering agent is further improved. Experimental results show that the bearing capacity of the temporary plugging steering agent provided by the invention reaches more than 58 MPa.
Detailed Description
The invention provides a temporary plugging steering agent which is prepared from the following raw materials in percentage by mass: 20-25% of polyacrylamide, 36-55% of polylactic acid, 5-10% of ceramsite, 10-15% of starch and 5-15% of glycerol.
The raw materials for preparing the temporary plugging diversion agent comprise 20-25% of polyacrylamide, preferably 22-24% of polyacrylamide, and more preferably 22-23% of polyacrylamide. The source of the polyacrylamide is not particularly limited, and the polyacrylamide can be prepared by commercially available products or by a well-known preparation method, which are well known to those skilled in the art. In the invention, the polyacrylamide is used as a framework material, and can be cooperated with polylactic acid to improve the pressure bearing capacity of the temporary plugging steering agent.
The raw materials for preparing the temporary plugging steering agent also comprise 36-55% of polylactic acid, preferably 40-50% of polylactic acid and more preferably 45-50% of polylactic acid. In the present invention, the molecular weight of the polylactic acid is preferably 900 to 1100 ten thousand; the melting point of the polylactic acid is preferably 175 ℃. The source of the polylactic acid is not particularly limited, and commercially available products known to those skilled in the art may be used. In the invention, the polylactic acid is used as a framework material, and can be cooperated with polyacrylamide to improve the pressure bearing capacity of the temporary plugging steering agent.
The raw materials for preparing the temporary plugging diverting agent also comprise 5-10% of ceramsite, preferably 6-8% of ceramsite and more preferably 7% of ceramsite by mass percent. In the present invention, the particle size of the ceramic particles is preferably 50 to 100 mesh. The source of the ceramsite is not particularly limited, and commercially available products known to those skilled in the art may be used. In the invention, the ceramsite is used as the propping agent, so that the crack can be effectively supported, and the pressure bearing capacity of the temporary plugging steering agent is further improved.
The raw materials for preparing the temporary plugging steering agent also comprise 10-15% of starch, preferably 12-14% of starch, and more preferably 13-14% of starch. In the present invention, the starch is preferably corn starch and/or tapioca starch. The source of the starch is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. In the invention, the starch is used as a filler, and the pressure bearing capacity of the temporary plugging steering agent can be further improved under the action of glycerol.
The raw materials for preparing the temporary plugging steering agent also comprise 5-15% of glycerin, preferably 8-15% of glycerin, and more preferably 9-10% of glycerin. The source of the glycerin is not particularly limited, and commercially available products known to those skilled in the art may be used. In the invention, the glycerol is used as a compatibilizer, so that the compatibility of starch and polylactic acid can be improved, and the pressure bearing capacity of the temporary plugging steering agent is further improved.
In the present invention, the particle size of the temporary plugging diversion agent is preferably 100 to 200 mesh. According to the invention, the crack can be better filled by controlling the particle size of the temporary plugging steering agent, so that the pressure-bearing effect is further improved.
According to the invention, polyacrylamide and polylactic acid are used as framework materials, and the intensity of the temporary plugging steering agent is synergistically improved by regulating and controlling the dosage of the polyacrylamide and the polylactic acid, so that the bearing capacity is improved; the ceramsite is used as the propping agent, so that the pressure bearing capacity of the temporary plugging steering agent is further improved; the starch is used as a filler, and the glycerol can improve the compatibility of polylactic acid and starch, so that the pressure bearing capacity of the temporary plugging steering agent is further improved.
The invention also provides a preparation method of the temporary plugging diversion agent, which comprises the following steps:
(1) Mixing polyacrylamide, polylactic acid, ceramsite, starch and glycerol to obtain a mixed material;
(2) And (3) carrying out extrusion molding on the mixed material obtained in the step (1) to obtain the temporary plugging steering agent.
According to the invention, polyacrylamide, polylactic acid, ceramsite, starch and glycerin are mixed to obtain a mixed material.
In the present invention, the mixing of the polyacrylamide, polylactic acid, ceramsite, starch and glycerin is preferably performed in a high-speed mixer. The type of the high-speed mixer is not particularly limited, and instruments and equipment well known to those skilled in the art can be adopted.
In the present invention, the mixing time of the polyacrylamide, the polylactic acid, the ceramsite, the starch and the glycerin is preferably 5 to 10 minutes. The temperature of the mixing is not particularly limited, and the mixing may be performed at room temperature.
After the mixed material is obtained, the invention performs extrusion molding on the mixed material to obtain the temporary plugging steering agent.
The operation of extrusion molding is not particularly limited, and the technological parameters can be adjusted according to actual conditions.
After the extrusion molding is finished, the product obtained by the extrusion molding is preferably crushed to obtain the temporary plugging steering agent.
The crushing operation is not particularly limited in the invention, as long as the particle size of the temporary plugging steering agent is ensured to be 100-200 meshes.
The preparation method provided by the invention has simple process and is suitable for industrial production.
The technical solutions of the present invention will be clearly and completely described in the following in connection with the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The temporary plugging diversion agent is prepared from the following raw materials in percentage by mass: 20% of polyacrylamide, 55% of polylactic acid, 5% of ceramsite, 10% of corn starch and 10% of glycerol; wherein the molecular weight of the polylactic acid is 900-1100 ten thousand, and the melting point is 175 ℃; the particle size of the ceramsite is 50-100 meshes; the particle size of the temporary plugging steering agent is 100-200 meshes;
the preparation method of the temporary plugging diversion agent comprises the following steps:
(1) Mixing polyacrylamide, polylactic acid, ceramsite, starch and glycerin in a high-speed mixer for 10min to obtain a mixed material;
(2) And (3) sequentially carrying out extrusion molding and crushing on the mixed material obtained in the step (1) to obtain the temporary plugging steering agent.
Comparative example 1
The formulation of the temporary blocking diverting agent was changed on the basis of example 1: the temporary plugging diversion agent is prepared from the following raw materials in percentage by mass: 75% of polyacrylamide, 5% of ceramsite, 10% of corn starch and 10% of glycerol, and other conditions are unchanged.
Comparative example 2
The formulation of the temporary blocking diverting agent was changed on the basis of example 1: the temporary plugging diversion agent is prepared from the following raw materials in percentage by mass: 75% of polylactic acid, 5% of ceramsite, 10% of corn starch and 10% of glycerol, and other conditions are unchanged.
Example 2
The temporary plugging diversion agent is prepared from the following raw materials in percentage by mass: 22% of polyacrylamide, 50% of polylactic acid, 10% of ceramsite, 10% of corn starch and 8% of glycerol; wherein the molecular weight of the polylactic acid is 900-1100 ten thousand, and the melting point is 175 ℃; the particle size of the ceramsite is 50-100 meshes; the particle size of the temporary plugging steering agent is 100-200 meshes;
the preparation method of the temporary plugging diversion agent comprises the following steps:
(1) Mixing polyacrylamide, polylactic acid, ceramsite, starch and glycerin in a high-speed mixer for 10min to obtain a mixed material;
(2) And (3) sequentially carrying out extrusion molding and crushing on the mixed material obtained in the step (1) to obtain the temporary plugging steering agent.
Example 3
The temporary plugging diversion agent is prepared from the following raw materials in percentage by mass: 23% of polyacrylamide, 45% of polylactic acid, 8% of ceramsite, 15% of corn starch and 9% of glycerol; wherein the molecular weight of the polylactic acid is 900-1100 ten thousand, and the melting point is 175 ℃; the particle size of the ceramsite is 50-100 meshes; the particle size of the temporary plugging steering agent is 100-200 meshes;
the preparation method of the temporary plugging diversion agent comprises the following steps:
(1) Mixing polyacrylamide, polylactic acid, ceramsite, starch and glycerin in a high-speed mixer for 10min to obtain a mixed material;
(2) And (3) sequentially carrying out extrusion molding and crushing on the mixed material obtained in the step (1) to obtain the temporary plugging steering agent.
Example 4
The temporary plugging diversion agent is prepared from the following raw materials in percentage by mass: 25% of polyacrylamide, 36% of polylactic acid, 13% of ceramsite, 12% of corn starch and 14% of glycerol; wherein the molecular weight of the polylactic acid is 900-1100 ten thousand, and the melting point is 175 ℃; the particle size of the ceramsite is 50-100 meshes; the particle size of the temporary plugging steering agent is 100-200 meshes;
the preparation method of the temporary plugging diversion agent comprises the following steps:
(1) Mixing polyacrylamide, polylactic acid, ceramsite, starch and glycerin in a high-speed mixer for 10min to obtain a mixed material;
(2) And (3) sequentially carrying out extrusion molding and crushing on the mixed material obtained in the step (1) to obtain the temporary plugging steering agent.
The temporary plugging diversion agents prepared in examples 1 to 4 and comparative examples 1 to 2 were tested for bearing capacity, and temporary plugging agent plugging simulation experiments were performed by using a self-made steel core in a laboratory under the experimental conditions: the pressure was applied for 10min and the pressure was constant for 110min, and the results are shown in Table 1.
TABLE 1 pressure bearing Capacity data of temporary blocking steering Agents prepared in examples 1-4 and comparative examples 1-2
| Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 | |
| Pressure bearing capacity/MPa | 59 | 58 | 62 | 60 | 50 | 53 |
As can be seen from table 1, compared with the temporary plugging diverter prepared in comparative examples 1-2, the temporary plugging diverter prepared in example 1 has higher pressure-bearing capacity, which indicates that the pressure-bearing capacity of the temporary plugging diverter can be synergistically improved by controlling the content of polylactic acid and polyacrylamide; the pressure bearing capacity of the temporary plugging steering agent can be further improved by regulating and controlling the formula.
From the above examples, it can be seen that the temporary plugging diverter provided by the invention has excellent pressure-bearing capacity.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (4)
1. The temporary plugging steering agent is prepared from the following raw materials in percentage by mass: 23% of polyacrylamide, 45% of polylactic acid, 8% of ceramsite, 15% of starch and 9% of glycerol;
the starch is corn starch;
the particle size of the ceramsite is 50-100 meshes;
the molecular weight of the polylactic acid is 900-1100 ten thousand, and the melting point of the polylactic acid is 175 ℃;
the particle size of the temporary plugging steering agent is 100-200 meshes;
the preparation method of the temporary plugging steering agent comprises the following steps:
(1) Mixing polyacrylamide, polylactic acid, ceramsite, starch and glycerol to obtain a mixed material;
(2) And (3) carrying out extrusion molding on the mixed material obtained in the step (1) to obtain the temporary plugging steering agent.
2. The method for preparing the temporary plugging diversion agent as defined in claim 1, comprising the following steps:
(1) Mixing polyacrylamide, polylactic acid, ceramsite, starch and glycerol to obtain a mixed material;
(2) And (3) carrying out extrusion molding on the mixed material obtained in the step (1) to obtain the temporary plugging steering agent.
3. The preparation method according to claim 2, wherein the mixing time in the step (1) is 5-10 min.
4. The method according to claim 2, wherein the mixing in step (1) is performed in a high-speed mixer.
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| CN115678522B (en) * | 2022-11-04 | 2023-05-05 | 大庆信辰油田技术服务有限公司 | Temporary plugging agent for heavy oil well and preparation method and application thereof |
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