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Environment-friendly high-temperature-resistant shale inhibitor composition and environment-friendly high-temperature-resistant shale inhibitor

A technology of shale inhibitor and high temperature resistance, which is applied in the field of drilling materials, can solve the problems of low temperature resistance and high cost, and achieve the effects of low cost, enhanced temperature and salt resistance, and reduced cost

Active Publication Date: 2022-02-18
石家庄市华荣泥浆材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide an environment-friendly high-temperature-resistant shale inhibitor composition and an environment-friendly high-temperature-resistant shale inhibitor to solve the problems of high cost and low temperature resistance of shale inhibitors in the prior art

Method used

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  • Environment-friendly high-temperature-resistant shale inhibitor composition and environment-friendly high-temperature-resistant shale inhibitor

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preparation example Construction

[0028] In one embodiment of the present application, the preparation method of the above-mentioned environment-friendly high-temperature resistant shale inhibitor includes: mixing acrylamide, waste acrylic fiber hydrolyzed ammonium salt, alkyl dihydroxyethyl allyl ammonium bromide and water to form The system to be reacted; after the temperature of the system to be reacted is raised to 50-90° C., an initiator is added to carry out a polymerization reaction to obtain an environment-friendly high-temperature-resistant shale inhibitor. The above preparation method is simple and easy for industrialization.

[0029] In order to improve the stability of the degree of polymerization of the formed shale inhibitor, it is preferable to add an initiator to carry out the polymerization reaction after the temperature of the reaction system is raised to 60-80°C.

Embodiment 1

[0032] By weight, 10 parts of acrylamide, 1 part of waste acrylic fiber hydrolyzed ammonium salt with a viscosity of 17.6, and 5 parts of dodecyl dihydroxyethyl allyl ammonium bromide are installed in a container equipped with a reflux condenser, an air guide tube, and a thermometer. , stirrer reactor, add water and stir to dissolve, then raise the temperature to 70°C, and add 0.05 parts of ammonium persulfate-sodium bisulfite as an initiator, and after 4 hours of reaction, an environmentally friendly high-temperature resistant page can be obtained rock inhibitors.

Embodiment 2

[0034] By weight, 15 parts of acrylamide, 3 parts of waste acrylic fiber hydrolyzed ammonium salt with a viscosity of 17.6, and 8 parts of dodecyl dihydroxyethyl allyl ammonium bromide are installed in a reflux condenser, air guide tube, and thermometer. , stirrer reactor, add water and stir to dissolve, then raise the temperature to 70°C, and add 0.05 parts of ammonium persulfate-sodium bisulfite as an initiator, after 4 hours of reaction, an environmentally friendly high-temperature-resistant page can be obtained rock inhibitors.

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Abstract

The invention provides an environment-friendly high-temperature-resistant shale inhibitor composition and an environment-friendly high-temperature-resistant shale inhibitor. In parts by weight, the composition comprises: 5-15 parts of acrylamide, 0.5-5 parts of waste acrylic fiber hydrolyzed ammonium salt, and 2-10 parts of alkyl dihydroxyethyl allyl ammonium bromide. Alkyl dihydroxyethyl allyl ammonium bromide is used as a monomer, which is easily soluble in water, and can be polymerized with acrylamide under the action of an initiator to form a cationic polymer, so no organic solvent is needed, and there is no biological toxicity. At the same time, due to the use of waste acrylic fiber hydrolyzed ammonium salt, the temperature and salt resistance of the shale inhibitor is enhanced. Therefore, the shale inhibitor prepared by the mixture of the above components has high temperature resistance and salt resistance. At the same time, because the waste acrylic fiber in the waste acrylic fiber hydrolyzed ammonium salt is a waste material, its cost is relatively low, so the cost of the shale inhibitor can be reduced.

Description

technical field [0001] The invention relates to the technical field of drilling materials, in particular to an environment-friendly high-temperature-resistant shale inhibitor composition and an environment-friendly high-temperature-resistant shale inhibitor. Background technique [0002] Wellbore instability is a common and often encountered complex problem in oil and gas drilling. Downhole complex accidents caused by wellbore instability have always been a prominent problem in petroleum engineering at home and abroad, especially the wellbore instability in shale formations. [0003] During the past decades of development, oil-based drilling fluid has been the ideal choice to solve the problem of shale hydration swelling. However, due to the environmental protection problems of oil-based drilling fluids, the use of oil-based drilling fluids is increasingly restricted. Therefore, researchers are focusing more on the development of water-based drilling fluids, which can not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F226/02C09K8/035
CPCC08F220/56C08F226/02C09K8/035C09K2208/12
Inventor 李云翔李琳琼
Owner 石家庄市华荣泥浆材料有限公司