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Temperature-resistant and salt-resistant filtrate reducer for drilling fluid, and preparation method thereof

A technology of fluid loss reducer and drilling fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor temperature resistance and difficulty in application, and achieve enhanced rigidity, good salt resistance, and improved thermal stability sexual effect

Inactive Publication Date: 2019-12-17
中国石油集团川庆钻探工程有限公司钻井液技术服务公司 +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 temperature-resistant and salt-resistant fluid loss reducer for drilling fluid and its preparation method, so as to solve the problem that the existing cellulose-based fluid loss reducer has poor temperature resistance and is difficult to apply to deep well or ultra-deep well drilling

Method used

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  • Temperature-resistant and salt-resistant filtrate reducer for drilling fluid, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The temperature-resistant and salt-resistant fluid loss reducer for drilling fluid in this embodiment includes: in parts by weight, 20 parts of modified rice husk powder, 20 parts of modified bagasse, 20 parts of modified sulfonated lignite resin, and 10 parts of acrylamide 10 parts of acrylic acid, 10 parts of 2-acrylamido-2-methylpropanesulfonic acid, 10 parts of maleic anhydride, 5 parts of N-vinylpyrrolidone and 10 parts of dimethyl diallyl ammonium chloride.

[0032] Wherein, the preparation steps of the modified rice husk powder include: adding the rice husk to the culture solution, adding disodium hydrogen phosphate-citric acid buffer solution to the culture solution, adjusting the pH to 3, adding white rot fungus, and adding the white rot fungus at a temperature of 30° C. After reacting for 36 hours, take it out, dry it and crush it to a particle size of 50 mesh to obtain modified rice husk powder; wherein, the mass ratio of rice husk, culture solution and white ...

Embodiment 2

[0046] The temperature-resistant and salt-resistant fluid loss reducer for drilling fluid in this embodiment includes: in parts by weight, 30 parts of modified rice husk powder, 30 parts of modified bagasse, 30 parts of modified sulfonated lignite resin, and 20 parts of acrylamide 20 parts, 20 parts of acrylic acid, 15 parts of 2-acrylamido-2-methylpropanesulfonic acid, 15 parts of maleic anhydride, 10 parts of N-vinylpyrrolidone and 10 parts of dimethyl diallyl ammonium chloride.

[0047] Wherein, the preparation steps of modified rice husk powder, modified bagasse and modified sulfonated lignite resin are the same as those in Example 1.

[0048] The preparation method of the temperature-resistant and salt-resistant fluid loss additive for drilling fluid in this embodiment is consistent with the preparation method of the temperature-resistant and salt-resistant fluid loss additive for drilling fluid in Example 1.

Embodiment 3

[0050] The temperature-resistant and salt-resistant fluid loss reducer for drilling fluid in this embodiment includes: by weight, 35 parts of modified rice husk powder, 35 parts of modified bagasse, and 40 parts of modified sulfonated lignite resin 25 parts of acrylamide, 25 parts of acrylic acid, 20 parts of 2-acrylamido-2-methylpropanesulfonic acid, 17 parts of maleic anhydride, 15 parts of N-vinylpyrrolidone and dimethyl diallyl chloride Ammonium 12 parts. .

[0051] Wherein, the preparation steps of the modified rice husk powder include: adding the rice husk to the culture solution, adding disodium hydrogen phosphate-citric acid buffer solution to the culture solution, adjusting the pH to 3, adding white rot fungus, and adding the white rot fungus at a temperature of 32°C. After reacting for 45 hours, take it out, dry it and crush it to a particle size of 50 mesh to obtain modified rice husk powder; wherein, the mass ratio of rice husk, culture solution and white rot fung...

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Abstract

The invention discloses a temperature-resistant and salt-resistant filtrate reducer for a drilling fluid, and a preparation method thereof, and belongs to the technical field of oilfield exploitationdrilling treatment agents. The filtrate reducer comprises, by weight, 20-50 parts of a modified rice husk powder, 20-50 parts of modified bagasse, 20-60 parts of a modified sulfonated lignite resin, 10-40 parts of acrylamide, 10-40 parts of acrylic acid, 10-30 parts of 2-acrylamido-2-methylpropanesulfonic acid, 10-25 parts of maleic anhydride, 5-20 parts of N-vinylpyrrolidone and 10-15 parts of dimethyl diallyl ammonium chloride. Rice husks and bagasse are modified, and then are compounded with the sulfonated lignite resin, and the obtained mixture and other monomers undergo graft copolymerization, so the temperature resistance of the cellulose filtrate reducer can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of drilling treatment agents for oilfield production, in particular to a temperature-resistant and salt-resistant fluid loss reducer for drilling fluids and a preparation method thereof. Background technique [0002] With the increasing demand for energy in the world and the deepening of oil and gas field development, shallow oil and gas resources can no longer meet the needs of today's society, and the development of deep oil and gas resources has become inevitable. With the increasingly prominent environmental protection problems, controlling the pollution of drilling fluids to the environment from the source and developing environmentally friendly drilling fluid fluid loss control agents with good temperature and salt resistance can not only improve the performance of drilling fluids, but also effectively Reduce the cost of drilling, and at the same time reduce the damage to the environment during the dri...

Claims

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Application Information

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IPC IPC(8): C08F289/00C08F285/00C08F220/56C08F220/06C08F222/06C08F220/58C08F226/10C08F222/38C09K8/035C09K8/03
CPCC08F285/00C08F289/00C09K8/03C09K8/035C08F220/56C08F220/06C08F222/06C08F226/10C08F222/385
Inventor 贾兴民谢显涛王君邓宇陈兴明邵平杨芮
Owner 中国石油集团川庆钻探工程有限公司钻井液技术服务公司
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