CN110846009A - Borehole strengthening plugging agent and preparation method thereof - Google Patents
Borehole strengthening plugging agent and preparation method thereof Download PDFInfo
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- CN110846009A CN110846009A CN201911228346.6A CN201911228346A CN110846009A CN 110846009 A CN110846009 A CN 110846009A CN 201911228346 A CN201911228346 A CN 201911228346A CN 110846009 A CN110846009 A CN 110846009A
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- 238000005728 strengthening Methods 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 73
- 239000002245 particle Substances 0.000 claims abstract description 48
- 229920002522 Wood fibre Polymers 0.000 claims abstract description 30
- 239000002025 wood fiber Substances 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 24
- 239000004094 surface-active agent Substances 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 239000005416 organic matter Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 238000004321 preservation Methods 0.000 claims abstract description 11
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 17
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 claims description 7
- 229940077386 sodium benzenesulfonate Drugs 0.000 claims description 7
- MZSDGDXXBZSFTG-UHFFFAOYSA-M sodium;benzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=CC=C1 MZSDGDXXBZSFTG-UHFFFAOYSA-M 0.000 claims description 7
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 6
- 241000018646 Pinus brutia Species 0.000 claims description 6
- 235000011613 Pinus brutia Nutrition 0.000 claims description 6
- 241000219000 Populus Species 0.000 claims description 6
- 241000219492 Quercus Species 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000002023 wood Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 10
- 238000005553 drilling Methods 0.000 abstract description 9
- 239000012530 fluid Substances 0.000 abstract description 7
- 239000002002 slurry Substances 0.000 abstract description 6
- 239000005445 natural material Substances 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 12
- 239000004576 sand Substances 0.000 description 9
- 238000007654 immersion Methods 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 238000005457 optimization Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 240000007049 Juglans regia Species 0.000 description 1
- 235000009496 Juglans regia Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 235000020234 walnut Nutrition 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
- 229940082509 xanthan gum Drugs 0.000 description 1
- 235000010493 xanthan gum Nutrition 0.000 description 1
- 239000000230 xanthan gum Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
-
- 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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention relates to the technical field of treating agents for drilling fluids, in particular to a borehole strengthening plugging agent and a preparation method thereof, wherein the borehole strengthening plugging agent comprises the following raw materials in parts by weight: mixing and stirring required amounts of inorganic rigid particles, modified wood fibers, organic matter powder and surfactant in a reaction kettle for 1 to 2 hours, heating to 120 to 130 ℃, and reacting for 1 to 2 hours under heat preservation to obtain the well strengthening plugging agent. The inorganic rigid particles, the modified wood fibers and the organic wood powder are all prepared by directly processing natural substances in nature, and the obtained treating agent for the drilling fluid is an environment-friendly material, can strengthen a well hole, prevent well leakage, improve the stratum bearing capacity and improve the stability of a well wall, and has good compatibility with various slurry systems and small influence on rheological property.
Description
Technical Field
The invention relates to the technical field of treating agents for drilling fluid, and discloses a borehole strengthening plugging agent and a preparation method thereof.
Background
The method comprises the following steps of (1) oil and gas field exploration and development, wherein the most important step is to establish communication between oil and gas and the ground, and the drilling engineering is the most important engineering in the oil and gas exploration and development; in the process of crushing stratum rocks by a drill bit, micro cracks can be generated on a well wall, which is a potential risk of well leakage, in the field construction process, in most cases, when the well leakage occurs, the leakage is blocked by adopting a leakage blocking material, and the leakage blocking material is not added in advance to essentially strengthen a well hole and stabilize the well wall; even though the existing large-scale leak stoppage while drilling technology is used, when the well leakage occurs, the material while drilling enters a leakage passage to be blocked.
In order to prevent the well leakage, improve the pressure bearing capacity of the stratum and reduce the complex situations of the well leakage and the instability of the well wall, a material which can essentially strengthen the well hole, stabilize the well wall and prevent the well leakage or a better leakage-proof plugging product is developed from a new theory.
Disclosure of Invention
The invention provides a borehole strengthening plugging agent and a preparation method thereof, overcomes the defects of the prior art, and can provide the borehole strengthening plugging agent which can strengthen a borehole, prevent lost circulation, improve the pressure bearing capacity of a stratum and improve the stability of a borehole wall, has good compatibility with various slurry systems and has small influence on the rheological property.
One of the technical schemes of the invention is realized by the following measures: the wellbore strengthening and plugging agent comprises 45-60 parts of inorganic rigid particles, 25-40 parts of modified wood fibers, 10-15 parts of organic matter powder and 5-10 parts of surfactant, and is prepared by the following steps: mixing and stirring required amounts of inorganic rigid particles, modified wood fibers, organic matter powder and surfactant in a reaction kettle for 1 to 2 hours, heating to 120 to 130 ℃, and reacting for 1 to 2 hours under heat preservation to obtain the well strengthening plugging agent.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the inorganic rigid particles are more than one of ceramics and silicon carbide reinforcements, and the inorganic rigid particles have the gradation and mass ratio of 2500-mesh inorganic rigid particles: 1500 mesh inorganic rigid particles: 800 mesh inorganic rigid particles =4 to 5:2 to 4:1 to 3;
the modified wood fiber is a wood short fiber processed from more than one of pine, oak or poplar, and the length-diameter ratio of the modified wood fiber is 5-50: 1, and the diameter is 0.5-15 um;
the organic matter powder is a unidirectional pressure plugging agent with a specific mesh number, and the gradation and the mass ratio of the unidirectional pressure plugging agent are 100 meshes of unidirectional pressure plugging agent: 200 mesh unidirectional pressure plugging agent =1: 1;
the surfactant is more than one of stearic acid amide and sodium benzenesulfonate.
The second technical scheme of the invention is realized by the following measures: the preparation method of the borehole strengthening plugging agent comprises the following steps: mixing and stirring required amounts of inorganic rigid particles, modified wood fibers, organic matter powder and surfactant in a reaction kettle for 1 to 2 hours, heating to 120 to 130 ℃, and reacting for 1 to 2 hours under heat preservation to obtain the well strengthening plugging agent.
The following is further optimization or/and improvement of the second technical scheme of the invention:
the inorganic rigid particles are more than one of ceramics and silicon carbide reinforcements, and the inorganic rigid particles have the gradation and mass ratio of 2500-mesh inorganic rigid particles: 1500 mesh inorganic rigid particles: the 800 mesh inorganic rigid particles are 4 to 5:2 to 4:1 to 3;
the modified wood fiber is a wood short fiber processed from more than one of pine, oak or poplar, and the length-diameter ratio of the modified wood fiber is 5-50: 1, and the diameter is 0.5-15 um;
the organic matter powder is a unidirectional pressure plugging agent with a specific mesh number, and the gradation and the mass ratio of the unidirectional pressure plugging agent are 100 meshes of unidirectional pressure plugging agent: 200 mesh unidirectional pressure plugging agent =1: 1;
the surfactant is more than one of stearic acid amide and sodium benzenesulfonate.
The inorganic rigid particles, the modified wood fibers and the organic wood powder are all prepared by directly processing natural substances in nature, and the obtained treating agent for the drilling fluid is an environment-friendly material, can strengthen a well hole, prevent well leakage, improve the stratum bearing capacity and improve the stability of a well wall, and has good compatibility with various slurry systems and small influence on rheological property.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemicals mentioned in the present invention are all well known and commonly used in the art, unless otherwise specified.
The invention is further described below with reference to the following examples:
example 1: the wellbore strengthening and plugging agent comprises, by weight, 45-60 parts of inorganic rigid particles, 25-40 parts of modified wood fibers, 10-15 parts of organic powder and 5-10 parts of a surfactant, and is prepared by the following steps: mixing and stirring required amounts of inorganic rigid particles, modified wood fibers, organic matter powder and a surfactant in a reaction kettle for 1 to 2 hours, heating to 120 to 130 ℃, and reacting for 1 to 2 hours under heat preservation to obtain a well strengthening plugging agent;
the well strengthening plugging agent selects the reasonable matching of the inorganic rigid particles with different particle sizes, the modified wood fibers and the organic matter powder, so that the well strengthening plugging agent can be well embedded and used for plugging well wall cracks and pore throats to form a barrel hoop effect, further the well wall crack expansion stress is improved, and a low-permeability temporary plugging belt can be well formed in a near-well zone of a well wall by matching with the fluid loss reducing material in the drilling fluid, so that the well wall is strengthened, well leakage is prevented, and the well wall stability and the stratum pressure bearing capacity are improved; the invention has good compatibility with various mud systems, has little influence on the rheological property, has inert material as the main component, can ensure the rheological property of high-specific-gravity mud, and has better compatibility in water-based mud and oil-based mud; the inorganic rigid particles, the modified wood fibers and the organic wood powder are all prepared by directly processing natural substances in nature, are environment-friendly materials and have small influence on the environment.
The temperature resistant maximum temperature of the borehole strengthening plugging agent can reach 170 ℃ when the borehole strengthening plugging agent is used.
Example 2: the borehole strengthening and plugging agent comprises the following raw materials, by weight, 45 parts or 60 parts of inorganic rigid particles, 25 parts or 40 parts of modified wood fibers, 10 parts or 15 parts of organic powder and 5 parts or 10 parts of surfactants, and is prepared by the following steps: mixing and stirring required amounts of inorganic rigid particles, modified wood fibers, organic matter powder and surfactant in a reaction kettle for 1 hour or 2 hours, heating to 120 ℃ or 130 ℃, and reacting for 1 hour or 2 hours in a heat preservation manner to obtain the well strengthening plugging agent.
Example 3: in the optimization of the above embodiment, the inorganic rigid particles are one or more of ceramics and silicon carbide reinforcements, and the inorganic rigid particles have a gradation and a mass ratio of 2500 mesh: 1500 mesh inorganic rigid particles: 800 mesh inorganic rigid particles =4 to 5:2 to 4:1 to 3.
Example 4: as the optimization of the above embodiment, the modified wood fiber is a wood short fiber processed from more than one of pine, oak or poplar, and the aspect ratio of the modified wood fiber is 5 to 50:1, and the diameter is 0.5um to 15 um.
Example 5: as optimization of the above embodiment, the organic powder is a unidirectional pressure plugging agent with a specific mesh number, and the gradation and mass ratio of the unidirectional pressure plugging agent is 100 meshes of unidirectional pressure plugging agent: 200 mesh unidirectional pressure plugging agent =1: 1.
In the invention, the main components of the unidirectional pressure plugging agent are 50 percent of walnut shell powder and 50 percent of calcium carbonate powder, the type can be AT-DF1, the grain diameter is 100 meshes, and the type can also be AT-DF2, the grain diameter is 200 meshes.
Example 6: in the optimization of the embodiment, the surfactant is more than one of stearic acid amide and sodium benzenesulfonate.
Example 7: the preparation method of the borehole strengthening plugging agent is carried out according to the following steps: mixing and stirring required amounts of inorganic rigid particles, modified wood fibers, organic matter powder and surfactant in a reaction kettle for 1 to 2 hours, heating to 120 to 130 ℃, and reacting for 1 to 2 hours under heat preservation to obtain the well strengthening plugging agent.
Example 8: the borehole strengthening plugging agent is prepared according to the following steps: mixing and stirring 60 parts of ceramic, 30 parts of short wood fibers processed from poplar, 10 parts of unidirectional pressure plugging agent with the particle size of 100 meshes and 5 parts of stearic acid amide in a reaction kettle for 1 hour, heating to 120 ℃, and carrying out heat preservation reaction for 1 hour to obtain the borehole strengthening plugging agent, wherein the 2500-mesh ceramic: 1500 mesh ceramics: 800 mesh ceramic =5:3: 2.
Example 9: the borehole strengthening plugging agent is prepared according to the following steps: mixing 65 parts of silicon carbide, 20 parts of wood short fibers processed from oak, 15 parts of unidirectional pressure plugging agent with the particle size of 100 meshes and 10 parts of sodium benzenesulfonate in a reaction kettle, stirring for 1 hour, heating to 130 ℃, and carrying out heat preservation reaction for 1 hour to obtain the borehole strengthening plugging agent, wherein the silicon carbide with the particle size of 2500 meshes: 1500 mesh silicon carbide: 800 mesh silicon carbide =4:3: 3.
Example 10: the borehole strengthening plugging agent is prepared according to the following steps: mixing 65 parts of a mixture of ceramic and silicon carbide, 20 parts of wood short fibers processed from oak, 15 parts of a one-way pressure plugging agent with the particle size of 200 meshes and 10 parts of sodium benzenesulfonate in a reaction kettle, stirring for 1 hour, heating to 125 ℃, and carrying out heat preservation reaction for 1 hour to obtain the borehole strengthening plugging agent, wherein the silicon carbide with the particle size of 2500 meshes: 1500 mesh silicon carbide: 800 mesh silicon carbide =4:3: 3.
Example 11: the borehole strengthening plugging agent is prepared according to the following steps: 55 parts of a mixture of ceramic and silicon carbide, 30 parts of pine processed wood short fiber, 10 parts of unidirectional pressure plugging agent with the particle size of 200 meshes and 5 parts of stearic acid amide are mixed and stirred in a reaction kettle for 1 hour, then the mixture is heated to 120 ℃, and the temperature is kept for 1 hour to obtain the borehole strengthening plugging agent, wherein the proportion of 2500 meshes of silicon carbide: 1500 mesh silicon carbide: 800 mesh silicon carbide =4:3: 3.
According to the wellbore strengthening and plugging agent obtained in the embodiments 8 to 11, the experimental sample 1, the experimental sample 2, the experimental sample 3 and the experimental sample 4 are respectively obtained according to the following method and step configuration:
(1) distilled water 400 ml, adding caustic soda 0.4 g under the stirring of 11000 rpm;
(2) after the caustic soda is completely dissolved, 16.0 g of the borehole strengthening plugging agent is added, and the mixture is stirred at a high speed for 10 min;
(3) adding 1.6g xanthan gum (XC), stirring at high speed for 30 min, scraping off adhered substance adhered on the cup wall with glass rod, and stirring at low speed for defoaming.
The prepared experimental sample 1, experimental sample 2, experimental sample 3, and experimental sample 4 were subjected to the following tests:
1. immersion depth test
Loading 20-40 mesh dry clean river sand to a specified scale mark by using a pressure-resistant transparent tubular test device, tightly inserting, compacting and paving the river sand by using a small wood stick to prepare a sand bed, slowly pouring the sample slurry into an instrument, measuring the immersion depth of 30 min filtrate passing through the sand bed under the pressure of 0.7 MPa, measuring the immersion depth at each point on the circumference of the sand bed by using a steel plate ruler, and taking an arithmetic average value;
2. sand bed pressure bearing capacity test
After the test 1 (immersion depth test) is finished, slowly and uniformly pressurizing to 5.0MPa within 60s to 90s, stabilizing the pressure for 5 min, and judging that the pressure bearing capacity of the sand bed meets the index requirement if no filter loss exists; when there was a loss of fluid, the slurry should be poured off after the test was completed, the filter cake observed above the sand bed surface, and if it broke down or the sand bed below the filter cake dented significantly, the test should be retested.
The test results of the experimental sample 1 were: the immersion depth is not 4.6 cm; the bearing capacity (5 MPa) is qualified.
The test results of experimental sample 2 were: the immersion depth is less than 3.8 cm; the bearing capacity (5 MPa) is qualified.
The test results of experimental sample 3 were: the immersion depth is not 4.0 cm; the bearing capacity (5 MPa) is qualified.
The test results of experimental sample 4 were: the immersion depth is less than 3.0 cm; the bearing capacity (5 MPa) is qualified.
In conclusion, the inorganic rigid particles, the modified wood fibers and the organic wood powder are all prepared by directly processing natural substances in nature, and the obtained treating agent for the drilling fluid is an environment-friendly material, can strengthen a well hole, prevent well leakage, improve the pressure bearing capacity of a stratum and improve the stability of a well wall, and has good compatibility with various slurry systems and small influence on the rheology.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. The wellbore strengthening and plugging agent is characterized by comprising, by weight, 45-60 parts of inorganic rigid particles, 25-40 parts of modified wood fibers, 10-15 parts of organic matter powder and 5-10 parts of a surfactant, and is prepared by the following steps: mixing and stirring required amounts of inorganic rigid particles, modified wood fibers, organic matter powder and surfactant in a reaction kettle for 1 to 2 hours, heating to 120 to 130 ℃, and reacting for 1 to 2 hours under heat preservation to obtain the well strengthening plugging agent.
2. The wellbore strengthening plugging agent according to claim 1, wherein the inorganic rigid particles are one or more of ceramics and silicon carbide reinforcement, and the inorganic rigid particles have a grading and mass ratio of 2500 mesh inorganic rigid particles: 1500 mesh inorganic rigid particles: 800 mesh inorganic rigid particles =4 to 5:2 to 4:1 to 3.
3. The wellbore strengthening plugging agent of claim 1 or 2, wherein the modified wood fiber is a short wood fiber processed from more than one of pine, oak or poplar, and the modified wood fiber has an aspect ratio of 5 to 50:1 and a diameter of 0.5 to 15 um.
4. The borehole enhancement plugging agent according to claim 1, 2 or 3, characterized in that the organic powder is a unidirectional pressure plugging agent with a specific mesh number, and the gradation and mass ratio of the unidirectional pressure plugging agent is 100 meshes of unidirectional pressure plugging agent: 200 mesh unidirectional pressure plugging agent =1: 1.
5. The wellbore strengthening plugging agent of claim 1 or 2 or 3 or 4, wherein the surfactant is one or more of stearic acid amide and sodium benzenesulfonate.
6. The preparation method of the borehole strengthening plugging agent is characterized by comprising the following steps: mixing and stirring required amounts of inorganic rigid particles, modified wood fibers, organic matter powder and surfactant in a reaction kettle for 1 to 2 hours, heating to 120 to 130 ℃, and reacting for 1 to 2 hours under heat preservation to obtain the well strengthening plugging agent.
7. The method for preparing the wellbore strengthening and plugging agent according to claim 6, wherein the inorganic rigid particles are more than one of ceramics and silicon carbide reinforcement, and the inorganic rigid particles have a gradation and mass ratio of 2500 mesh inorganic rigid particles: 1500 mesh inorganic rigid particles: the 800 mesh inorganic rigid particles are 4 to 5:2 to 4:1 to 3.
8. The method for preparing the wellbore strengthening plugging agent according to claim 6 or 7, wherein the modified wood fiber is a short wood fiber processed from more than one of pine, oak or poplar, and the aspect ratio of the modified wood fiber is 5-50: 1, and the diameter is 0.5-15 um.
9. The method for preparing the borehole enhancement plugging agent according to the claim 6, 7 or 8, characterized in that the organic powder is a unidirectional pressure plugging agent with a specific mesh number, and the gradation and mass ratio of the unidirectional pressure plugging agent is 100 meshes of unidirectional pressure plugging agent: 200 mesh unidirectional pressure plugging agent =1: 1.
10. The method for preparing the wellbore strengthening plugging agent according to the claim 6 or 7 or 8 or 9, characterized in that the surfactant is more than one of stearic acid amide and sodium benzene sulfonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911228346.6A CN110846009A (en) | 2019-12-04 | 2019-12-04 | Borehole strengthening plugging agent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911228346.6A CN110846009A (en) | 2019-12-04 | 2019-12-04 | Borehole strengthening plugging agent and preparation method thereof |
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| CN110846009A true CN110846009A (en) | 2020-02-28 |
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| CN201911228346.6A Pending CN110846009A (en) | 2019-12-04 | 2019-12-04 | Borehole strengthening plugging agent and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480885A (en) * | 2020-12-09 | 2021-03-12 | 成都汉元君业油田技术有限公司 | Bridging synergist for drilling fluid |
| CN114656941A (en) * | 2022-04-22 | 2022-06-24 | 四川笔创科技有限公司 | Well strengthening agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104232029A (en) * | 2014-08-16 | 2014-12-24 | 成都汉元君业油田技术有限公司 | Low-permeability plugging agent |
| CN104592954A (en) * | 2015-01-05 | 2015-05-06 | 成都汉元君业油田技术有限公司 | Borehole strengthening blocking agent |
-
2019
- 2019-12-04 CN CN201911228346.6A patent/CN110846009A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104232029A (en) * | 2014-08-16 | 2014-12-24 | 成都汉元君业油田技术有限公司 | Low-permeability plugging agent |
| CN104592954A (en) * | 2015-01-05 | 2015-05-06 | 成都汉元君业油田技术有限公司 | Borehole strengthening blocking agent |
Non-Patent Citations (1)
| Title |
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| 黄进军等: "纳米封堵剂NF-1的制备与性能评价", 《钻井液与完井液》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480885A (en) * | 2020-12-09 | 2021-03-12 | 成都汉元君业油田技术有限公司 | Bridging synergist for drilling fluid |
| CN114656941A (en) * | 2022-04-22 | 2022-06-24 | 四川笔创科技有限公司 | Well strengthening agent |
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