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A cationic anti-collapse atomized liquid and its preparation method

A cationic and atomized liquid technology, which is applied in the field of cationic anti-slump atomized liquid and its preparation, can solve the problem of inability to effectively inhibit the hydration and expansion of shale, and achieves prolonging safe operation time, increasing water output, and inhibiting hydration. inflated effect

Active Publication Date: 2019-12-13
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cationic anti-slump atomized liquid, which can solve the problem that the anti-slump agent used in the existing atomized drilling construction cannot effectively inhibit the hydration expansion of mud shale, and can prolong the safe operation of atomized drilling time, improve atomization drilling to adapt to formation water yield, and take advantage of the technical advantages of gas drilling

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  • A cationic anti-collapse atomized liquid and its preparation method
  • A cationic anti-collapse atomized liquid and its preparation method
  • A cationic anti-collapse atomized liquid and its preparation method

Examples

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Effect test

Embodiment 1

[0021] A cationic anti-collapse atomizing liquid, the composition of the cationic anti-collapse atomizing liquid is as follows: 0.3% foaming agent, 0.05% cationic coating flocculant, 0.5% cationic well wall stabilizer, and the balance is water ; The pH value of the cationic anti-collapse atomizing liquid is 8.

[0022] The foaming agent is alkylphenol polyoxyethylene ether (OP-10); the cationic coating flocculant is acrylamide, N,N-dimethylacrylamide and methacryloxyethyl trimethyl chloride Ammonium copolymerization product; cationic wellbore stabilizer is a copolymerization product of acrylamide, N,N-dimethylacrylamide and dimethyl diallyl ammonium chloride.

[0023] The preparation method of cationic anti-collapse atomizing liquid is as follows:

[0024] Under normal temperature and pressure, first dissolve the cationic coating flocculant and cationic well wall stabilizer in 500ml of water, stir at 4000r / min for 20min, let stand at room temperature for 16h, make it fully di...

Embodiment 2

[0026] A cationic anti-slump atomization liquid, the composition of the cationic anti-slump atomization liquid is as follows: 0.4% foaming agent, 0.03% cationic coating flocculant, 0.5% cationic well wall stabilizer, and the balance is water ; The pH value of the anti-collapse atomized liquid is 9.

[0027] The foaming agent is alkylphenol polyoxyethylene ether (OP-10) and dodecyltrimethylammonium bromide, and the mass ratio of the two is 1:1; the cationic coating flocculant is acrylamide, N,N- The copolymerization product of diethylacrylamide and acryloyloxyethyltrimethylammonium chloride; the cationic wellbore stabilizer is the copolymerization of acrylamide, N,N-diethylacrylamide and dimethyldiallylammonium chloride product.

[0028] The preparation method of cationic anti-collapse atomizing liquid is as follows:

[0029] Under normal temperature and pressure, first dissolve the cationic coating flocculant and cationic well wall stabilizer in 500ml of water, stir at 6000r...

Embodiment 3

[0031] A cationic anti-slump atomization liquid, the composition of the cationic anti-slump atomization liquid is as follows: 0.5% foaming agent, 0.05% cationic coating flocculant, 0.5% cationic well wall stabilizer, and the balance is water ; The pH value of the anti-collapse atomized liquid is 10.

[0032] The foaming agent is cetyltrimethylammonium bromide; the cationic coating flocculant is the copolymerization product of acrylamide, N,N-dimethylacrylamide and dimethylaminoethyl acrylate; the cationic borehole stabilizer is Copolymerization product of acrylamide, N,N-diethylacrylamide and dimethyldiallylammonium chloride.

[0033] The preparation method of cationic anti-collapse atomizing liquid is as follows:

[0034] Under normal temperature and pressure, first dissolve the cationic coating flocculant and cationic well wall stabilizer in 400ml of water, stir at 5000r / min for 20min, let stand at room temperature for 20h, make it fully dissolved, add foaming agent, mix an...

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Abstract

Belonging to the technical field of petroleum drilling, the invention in particular relates to a cationic anti-collapse atomization liquid and a preparation method thereof. The anti-collapse atomization liquid comprises the following components by mass percentage: 0.1-0.5% of a foaming agent, 0.03-0.10% of a cationic coating flocculant, 0.3-0.7% of a cationic borehole stabilizer, and the balance water. The pH value of the anti-collapse atomization liquid is 8-10. The cationic anti-collapse atomization liquid provided by the invention has the performance of strong inhibition, strong adsorption, strong coating into a film, effectively inhibits the hydration expansion of mud shale, prolongs the mist drilling safe operation time, improves the mist drilling adaption stratum water yield, and is conducive to giving play to the technical advantages of gas drilling.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling, and in particular relates to a cationic anti-slump atomization liquid suitable for atomization drilling and a preparation method thereof. Background technique [0002] Gas drilling is a drilling technology in which gas is used as a circulating medium instead of drilling fluid. Compared with drilling fluid drilling, it can greatly protect the reservoir, greatly increase the mechanical penetration rate, and effectively reduce the downhole complexities such as lost circulation. Problems such as wellbore instability, mud bag sticking and cuttings carrying have become bottlenecks in the promotion of gas drilling. The emergence of atomization drilling technology has solved the above problems and maintained the advantages of gas drilling, but the applicable water yield is low (<30m 3 / h), the wellbore stability time is short (3~5d) and other problems. [0003] Atomized drilling belongs t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/12
Inventor 苏雪霞孙举王旭郝纪双宋亚静朱伟厚
Owner 中石化石油工程技术服务有限公司