CN105925252A - Preparation method of sepiolite-modified high-strength plugging agent - Google Patents
Preparation method of sepiolite-modified high-strength plugging agent Download PDFInfo
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- CN105925252A CN105925252A CN201610306235.2A CN201610306235A CN105925252A CN 105925252 A CN105925252 A CN 105925252A CN 201610306235 A CN201610306235 A CN 201610306235A CN 105925252 A CN105925252 A CN 105925252A
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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
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
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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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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Abstract
The invention relates to a preparation method of a sepiolite-modified high-strength plugging agent, and belongs to the technical field of material preparation. The method includes the steps that firstly, modifying sepiolite mixed liquor, polyvinyl alcohol and other substances are stirred and mixed, suction filtration, washing and drying are carried out, and modifying sepiolite particles are obtained; then, the modifying sepiolite particles, dimethylformamide and other substances are mixed and subjected to ultrasonic dispersion; then, the mixture, polyvinyl alcohol and ammonium sulfate are mixed and heated, evaporating and grinding are carried out, and the plugging agent can be obtained. The sepiolite-modified high-strength plugging agent prepared through the method is good in plugging effect, and the plugging rate is increased by 12-17%; besides, the sepiolite-modified high-strength plugging agent is high in pressure bearing capability and can bear the pressure of 18-25 MPa; the preparation steps are simple, and the needed cost is low.
Description
Technical field
The present invention relates to the preparation method of a kind of meerschaum modified high-strength degree sealing agent, belong to technical field of material.
Background technology
Leakage is, in various complex situations, bit speed and drilling cost are affected one of maximum factor, is a difficult problem for puzzlement oil-gas drilling.Once there is leakage, not only need to consume substantial amounts of drilling fluid materials and loss circulation material, but also extend engineering time, increase development cost, even cause bit freezing, burying, scrap the down-hole accidents such as Quan Jing.
The most conventional loss circulation material is broadly divided into physics loss circulation material and chemical plugging material: physics loss circulation material mainly has bridge joint loss circulation material and high dehydration loss circulation material.Bridge joint loss circulation material Main Basis grain composition principle, uses the walnut shell of varying particle size, mica sheet, rice husk, cotton seed hulls, sawdust etc. to compound for different Size of Cracks, thus blocks drop ply.Its major defect is to be difficult to judge or bore hole leakage section is longer when underground crack openings size, and when there is various ways crack or hole, sealing agent grain diameter is difficult to Proper Match with leakage formation pore throat diameter, does not has effective leak stopping effect.High dehydration loss circulation material is mainly formulated by paper scrap, kieselguhr, Calx etc., rapid dehydration under differential pressure action, and the solid phase components in serosity is assembled, retrogradation forms filter cake, is then compacted, and clogs leakage channel；If leakage channel is relatively big, then a certain proportion of particulate inert material of mixture in sealing agent utilizes bridging action to make leakage channel cross-sectional area relatively diminish, and is conducive to setting up pressure reduction, forms closure.Its shortcoming is that owing to such carbonate rock is connective preferably, porous, property are crisp, frangible, the plugged zone of formation is easily destroyed in follow-up drilling process and causes again missing applied for like when Lu Maila buries shallower carbonate formation.Chemical gel sealing agent in chemical plugging material is formed mainly by macromolecular material and cross-linking agent generation chemical reaction has certain elasticity, the gelinite of stronger adhesive attraction is had to reach to block the purpose of drop ply with rock, its major defect is that bearing capacity is poor, the bad control of gelation time.
Summary of the invention
The technical problem to be solved: poor for chemical gel sealing agent bearing capacity, at more than 10MPa, the problem losing leak stopping, provide and the material stirrings such as modified meerschaum mixed liquor and polyvinyl alcohol are mixed, sucking filtration, washing is dried, obtain modified meerschaum granule, again it is mixed with materials such as dimethylformamides and carry out ultrasonic disperse, then by its polyvinyl alcohol, after ammonium sulfate Hybrid Heating, evaporation is milled, the method that can be prepared into sealing agent, sealing agent bearing capacity prepared by the present invention is good, intensity is high, pressure-bearing is up to 18～25MPa, efficiently solve the problem that chemical gel sealing agent bearing capacity is poor.
For solving above-mentioned technical problem, the present invention uses the technical scheme as described below to be:
(1) 1:5 in mass ratio, sepiolite particle is placed in styrene monomer, stirring mixing is placed in ultrasonic disperse under 200～300W and processes 10～15min, it is prepared into modified meerschaum mixed liquor, count the most by weight, weighing the modified meerschaum mixed liquor of 35～55 parts of above-mentioned preparations, 10～15 parts of polyvinyl alcohol, 5～10 parts of benzoyl peroxides and 30～40 parts of deionized waters respectively to be placed in there-necked flask, stirring mixing is placed in heating in water bath 2～3h at 75～80 DEG C, is prepared into modified mixed liquor；
(2) the modified mixed liquor sucking filtration to above-mentioned preparation, collect filter cake and wash respectively 3～5 times with ethyl acetate and deionized water, after washing completes, the filter cake after washing being placed at 60 DEG C vacuum drying 3～5h, mill subsequently and sieve, being prepared into modified meerschaum granule；
(3) count by weight, the modified meerschaum granule weighing 35～55 parts of deionized waters, 10～15 parts of 1mol/L sodium hydroxide solutions, 10～15 parts of dimethylformamides, 5～10 parts of glacial acetic acid solutions and 20～25 parts of above-mentioned preparations respectively is placed in beaker, stirring mixing is placed in ultrasonic disperse under 200～300W and processes 10～15min, is prepared into mixing base fluid；
(4) count by weight, weigh the mixing base fluid of 45～55 parts of above-mentioned preparations, 35～40 parts of polyvinyl alcohol and 10～15 parts of Ammonium persulfate .s respectively to be placed in beaker, stirring mixing is placed in heating in water bath 3～5h at 65～80 DEG C, to be heated complete after, standing is cooled to room temperature, it is prepared into sealing agent coagulant liquid, is subsequently placed at rotary evaporated to dryness at 65～80 DEG C, mill and can be prepared into a kind of meerschaum modified high-strength degree sealing agent.
The application process of the present invention: the meerschaum modified high-strength degree sealing agent stirring of drilling fluid and drilling fluid quality 7～9% is mixed, being configured to leak stopping slurry, then inject in oil well by leak stopping slurry, controlling pump pressure is 3～4MPa, discharge capacity is 18～20L/s, respectively at well depth 302m, 515m and 935m, it is circulated plugging while drilling, after leak stopping terminates, termination of pumping observes 1～2h, turn on pump circulation 5～7h, detects to oil well without leakage phenomena, leak stopping success.
The present invention is compared with additive method, and Advantageous Effects is:
(1) the meerschaum modified high-strength degree sealing agent plugging effect that prepared by the present invention is good, and leak stopping rate improves 12～17%；
(2) the sealing agent bearing capacity that prepared by the present invention is good, and pressure-bearing is up to 18～25MPa；
(3) preparation process is simple, required low cost.
Detailed description of the invention
1:5 the most in mass ratio, sepiolite particle is placed in styrene monomer, stirring mixing is placed in ultrasonic disperse under 200～300W and processes 10～15min, it is prepared into modified meerschaum mixed liquor, count the most by weight, weighing the modified meerschaum mixed liquor of 35～55 parts of above-mentioned preparations, 10～15 parts of polyvinyl alcohol, 5～10 parts of benzoyl peroxides and 30～40 parts of deionized waters respectively to be placed in there-necked flask, stirring mixing is placed in heating in water bath 2～3h at 75～80 DEG C, is prepared into modified mixed liquor；Modified mixed liquor sucking filtration to above-mentioned preparation again, collect filter cake and wash respectively 3～5 times with ethyl acetate and deionized water, after washing completes, the filter cake after washing being placed at 60 DEG C vacuum drying 3～5h, mill subsequently and sieve, being prepared into modified meerschaum granule；Count the most by weight, the modified meerschaum granule weighing 35～55 parts of deionized waters, 10～15 parts of 1mol/L sodium hydroxide solutions, 10～15 parts of dimethylformamides, 5～10 parts of glacial acetic acid solutions and 20～25 parts of above-mentioned preparations respectively is placed in beaker, stirring mixing is placed in ultrasonic disperse under 200～300W and processes 10～15min, is prepared into mixing base fluid；Finally count by weight, weigh the mixing base fluid of 45～55 parts of above-mentioned preparations, 35～40 parts of polyvinyl alcohol and 10～15 parts of Ammonium persulfate .s respectively to be placed in beaker, stirring mixing is placed in heating in water bath 3～5h at 65～80 DEG C, to be heated complete after, standing is cooled to room temperature, it is prepared into sealing agent coagulant liquid, is subsequently placed at rotary evaporated to dryness at 65～80 DEG C, mill and can be prepared into a kind of meerschaum modified high-strength degree sealing agent.
Example 1
1:5 the most in mass ratio, sepiolite particle is placed in styrene monomer, stirring mixing is placed in ultrasonic disperse under 300W and processes 15min, it is prepared into modified meerschaum mixed liquor, count the most by weight, weighing the modified meerschaum mixed liquor of 55 parts of above-mentioned preparations, 10 parts of polyvinyl alcohol, 5 parts of benzoyl peroxides and 30 parts of deionized waters respectively to be placed in there-necked flask, stirring mixing is placed in heating in water bath 3h at 80 DEG C, is prepared into modified mixed liquor；Modified mixed liquor sucking filtration to above-mentioned preparation again, collects filter cake and washs respectively 5 times with ethyl acetate and deionized water, after washing completes, the filter cake after washing is placed at 60 DEG C vacuum drying 5h, mills subsequently and sieve, being prepared into modified meerschaum granule；Count the most by weight, the modified meerschaum granule weighing 55 parts of deionized waters, 10 parts of 1mol/L sodium hydroxide solutions, 10 parts of dimethylformamides, 5 parts of glacial acetic acid solutions and 20 parts of above-mentioned preparations respectively is placed in beaker, stirring mixing is placed in ultrasonic disperse under 300W and processes 15min, is prepared into mixing base fluid；Finally count by weight, weigh the mixing base fluid of 55 parts of above-mentioned preparations, 35 parts of polyvinyl alcohol and 10 parts of Ammonium persulfate .s respectively to be placed in beaker, stirring mixing is placed in heating in water bath 5h at 80 DEG C, to be heated complete after, standing is cooled to room temperature, it is prepared into sealing agent coagulant liquid, is subsequently placed at rotary evaporated to dryness at 80 DEG C, mill and can be prepared into a kind of meerschaum modified high-strength degree sealing agent.
Drilling fluid is stirred with the meerschaum modified high-strength degree sealing agent of drilling fluid quality 9% and mixes, be configured to leak stopping slurry, then leak stopping slurry is injected in oil well, control pump pressure for 4MPa, discharge capacity is 20L/s, respectively at well depth 302m, 515m and 935m, is circulated plugging while drilling, after leak stopping terminates, 2h, turn on pump circulation 7h, detection are observed in termination of pumping, oil well is without leakage phenomena, leak stopping success.
Example 2
1:5 the most in mass ratio, sepiolite particle is placed in styrene monomer, stirring mixing is placed in ultrasonic disperse under 200W and processes 10min, it is prepared into modified meerschaum mixed liquor, count the most by weight, weighing the modified meerschaum mixed liquor of 35 parts of above-mentioned preparations, 15 parts of polyvinyl alcohol, 10 parts of benzoyl peroxides and 40 parts of deionized waters respectively to be placed in there-necked flask, stirring mixing is placed in heating in water bath 2h at 75 DEG C, is prepared into modified mixed liquor；Modified mixed liquor sucking filtration to above-mentioned preparation again, collects filter cake and washs respectively 3 times with ethyl acetate and deionized water, after washing completes, the filter cake after washing is placed at 60 DEG C vacuum drying 3h, mills subsequently and sieve, being prepared into modified meerschaum granule；Count the most by weight, the modified meerschaum granule weighing 35 parts of deionized waters, 15 parts of 1mol/L sodium hydroxide solutions, 15 parts of dimethylformamides, 10 parts of glacial acetic acid solutions and 25 parts of above-mentioned preparations respectively is placed in beaker, stirring mixing is placed in ultrasonic disperse under 200W and processes 15min, is prepared into mixing base fluid；Finally count by weight, weigh the mixing base fluid of 45 parts of above-mentioned preparations, 40 parts of polyvinyl alcohol and 15 parts of Ammonium persulfate .s respectively to be placed in beaker, stirring mixing is placed in heating in water bath 3h at 65 DEG C, to be heated complete after, standing is cooled to room temperature, it is prepared into sealing agent coagulant liquid, is subsequently placed at rotary evaporated to dryness at 65 DEG C, mill and can be prepared into a kind of meerschaum modified high-strength degree sealing agent.
Drilling fluid is stirred with the meerschaum modified high-strength degree sealing agent of drilling fluid quality 7% and mixes, be configured to leak stopping slurry, then leak stopping slurry is injected in oil well, control pump pressure for 3MPa, discharge capacity is 18L/s, respectively at well depth 302m, 515m and 935m, is circulated plugging while drilling, after leak stopping terminates, 1h, turn on pump circulation 5h, detection are observed in termination of pumping, oil well is without leakage phenomena, leak stopping success.
Example 3
1:5 the most in mass ratio, sepiolite particle is placed in styrene monomer, stirring mixing is placed in ultrasonic disperse under 250W and processes 12min, it is prepared into modified meerschaum mixed liquor, count the most by weight, weighing the modified meerschaum mixed liquor of 40 parts of above-mentioned preparations, 15 parts of polyvinyl alcohol, 10 parts of benzoyl peroxides and 35 parts of deionized waters respectively to be placed in there-necked flask, stirring mixing is placed in heating in water bath 2h at 77 DEG C, is prepared into modified mixed liquor；Modified mixed liquor sucking filtration to above-mentioned preparation again, collects filter cake and washs respectively 4 times with ethyl acetate and deionized water, after washing completes, the filter cake after washing is placed at 60 DEG C vacuum drying 4h, mills subsequently and sieve, being prepared into modified meerschaum granule；Count the most by weight, the modified meerschaum granule weighing 45 parts of deionized waters, 10 parts of 1mol/L sodium hydroxide solutions, 10 parts of dimethylformamides, 10 parts of glacial acetic acid solutions and 25 parts of above-mentioned preparations respectively is placed in beaker, stirring mixing is placed in ultrasonic disperse under 250W and processes 12min, is prepared into mixing base fluid；Finally count by weight, weigh the mixing base fluid of 50 parts of above-mentioned preparations, 40 parts of polyvinyl alcohol and 10 parts of Ammonium persulfate .s respectively to be placed in beaker, stirring mixing is placed in heating in water bath 4h at 70 DEG C, to be heated complete after, standing is cooled to room temperature, it is prepared into sealing agent coagulant liquid, is subsequently placed at rotary evaporated to dryness at 70 DEG C, mill and can be prepared into a kind of meerschaum modified high-strength degree sealing agent.
Drilling fluid is stirred with the meerschaum modified high-strength degree sealing agent of drilling fluid quality 8% and mixes, be configured to leak stopping slurry, then leak stopping slurry is injected in oil well, control pump pressure for 4MPa, discharge capacity is 19L/s, respectively at well depth 302m, 515m and 935m, is circulated plugging while drilling, after leak stopping terminates, 2h, turn on pump circulation 6h, detection are observed in termination of pumping, oil well is without leakage phenomena, leak stopping success.
Claims (1)
1. the preparation method of a meerschaum modified high-strength degree sealing agent, it is characterised in that concrete preparation process is:
(1) 1:5 in mass ratio, sepiolite particle is placed in styrene monomer, stirring mixing is placed in ultrasonic disperse under 200～300W and processes 10～15min, it is prepared into modified meerschaum mixed liquor, count the most by weight, weighing the modified meerschaum mixed liquor of 35～55 parts of above-mentioned preparations, 10～15 parts of polyvinyl alcohol, 5～10 parts of benzoyl peroxides and 30～40 parts of deionized waters respectively to be placed in there-necked flask, stirring mixing is placed in heating in water bath 2～3h at 75～80 DEG C, is prepared into modified mixed liquor；
(2) the modified mixed liquor sucking filtration to above-mentioned preparation, collect filter cake and wash respectively 3～5 times with ethyl acetate and deionized water, after washing completes, the filter cake after washing being placed at 60 DEG C vacuum drying 3～5h, mill subsequently and sieve, being prepared into modified meerschaum granule；
(3) count by weight, the modified meerschaum granule weighing 35～55 parts of deionized waters, 10～15 parts of 1mol/L sodium hydroxide solutions, 10～15 parts of dimethylformamides, 5～10 parts of glacial acetic acid solutions and 20～25 parts of above-mentioned preparations respectively is placed in beaker, stirring mixing is placed in ultrasonic disperse under 200～300W and processes 10～15min, is prepared into mixing base fluid；
(4) count by weight, weigh the mixing base fluid of 45～55 parts of above-mentioned preparations, 35～40 parts of polyvinyl alcohol and 10～15 parts of Ammonium persulfate .s respectively to be placed in beaker, stirring mixing is placed in heating in water bath 3～5h at 65～80 DEG C, to be heated complete after, standing is cooled to room temperature, it is prepared into sealing agent coagulant liquid, is subsequently placed at rotary evaporated to dryness at 65～80 DEG C, mill and can be prepared into a kind of meerschaum modified high-strength degree sealing agent.
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| CN201610306235.2A CN105925252A (en) | 2016-05-10 | 2016-05-10 | Preparation method of sepiolite-modified high-strength plugging agent |
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| CN201610306235.2A CN105925252A (en) | 2016-05-10 | 2016-05-10 | Preparation method of sepiolite-modified high-strength plugging agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107033864A (en) * | 2017-05-14 | 2017-08-11 | 石磊 | A kind of preparation method of sealing agent |
| CN107266646A (en) * | 2017-06-28 | 2017-10-20 | 常州创索新材料科技有限公司 | One kind support modified version polyurethane sealing Porous materials |
-
2016
- 2016-05-10 CN CN201610306235.2A patent/CN105925252A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107033864A (en) * | 2017-05-14 | 2017-08-11 | 石磊 | A kind of preparation method of sealing agent |
| CN107266646A (en) * | 2017-06-28 | 2017-10-20 | 常州创索新材料科技有限公司 | One kind support modified version polyurethane sealing Porous materials |
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Application publication date: 20160907 |