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Preparation method for high-temperature-resistant stable gel profile control agent material

A stable and profile-modifying agent technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as poor high-temperature resistance stability, and achieve improved high-temperature resistance, high biochemical activity, and excellent high-temperature resistance. Effect

Inactive Publication Date: 2018-06-22
常州聚盛节能工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem of poor high temperature resistance and stability of traditional profile control materials, a preparation method of high temperature resistant and stable gel profile control agent material is provided

Method used

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  • Preparation method for high-temperature-resistant stable gel profile control agent material

Examples

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example 1

[0020] Take shellac particles and ball mill them, pass through a 200-mesh sieve to obtain shellac powder, and weigh 45 parts of shellac powder, 10 parts of sodium sulfite, and 75 parts of 0.8mol / L sodium hydroxide solution in a three-necked flask by weight. , heated in a water bath at 75°C for 2 hours to obtain a mixed solution. Add sodium chloride to the mixed solution at a mass ratio of 1:6, let it stand and age for 6 hours, and then centrifuge at 1500r / min to collect the lower precipitate. According to the mass ratio of 1:10, the lower precipitate and deionized water were stirred and mixed, and then heated in an oil bath at 90°C for 25 minutes to obtain a matrix mixed solution, and at a volume ratio of 1:15, 45% nitric acid was added dropwise to In the matrix mixed solution, the dropping rate was controlled at 2mL / min. After the dropwise addition was completed, the modified solution was obtained and heated in a water bath at 85°C for 3 hours, filtered to obtain a filter cake...

example 2

[0022] Take shellac particles and ball mill them, pass through a 200-mesh sieve to obtain shellac powder, and weigh 47 parts of shellac powder, 12 parts of sodium sulfite, and 77 parts of 0.8mol / L sodium hydroxide solution in a three-necked flask in parts by weight , heated in a water bath at 77°C for 2 hours to obtain a mixed solution. Add sodium chloride to the mixed solution at a mass ratio of 1:6, let it stand and age for 7 hours, and then centrifuge at 1750r / min to collect the lower precipitate. According to the mass ratio of 1:10, the lower precipitate and deionized water were stirred and mixed, and heated in an oil bath at 95°C for 27 minutes to obtain a matrix mixed solution, and the mass fraction of 45% nitric acid was added dropwise to In the matrix mixed solution, the dropping rate was controlled at 2mL / min. After the dropwise addition was completed, the modified solution was obtained and heated in a water bath at 87°C for 4 hours, filtered to obtain a filter cake an...

example 3

[0024] Take shellac particles and ball mill them, pass through a 200-mesh sieve to obtain shellac powder, and weigh 50 parts of shellac powder, 15 parts of sodium sulfite, and 80 parts of 0.8mol / L sodium hydroxide solution in a three-necked flask by weight. , heated in a water bath at 80°C for 3 hours to obtain a mixed solution. Add sodium chloride to the mixed solution at a mass ratio of 1:6, let it stand and age for 8 hours, and then centrifuge at 2000r / min to collect the lower precipitate. According to the mass ratio of 1:10, the lower precipitate and deionized water were stirred and mixed, and placed in an oil bath at 100°C for 30 minutes to obtain a matrix mixture, and according to the volume ratio of 1:15, the mass fraction of 45% nitric acid was added dropwise to In the matrix mixed solution, the dropping rate was controlled at 2mL / min. After the dropwise addition was completed, the modified solution was obtained and heated in a water bath at 90°C for 5 hours, filtered t...

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Abstract

The invention relates to a preparation method for a high-temperature-resistant stable gel profile control agent material, and belongs to the technical field of mineral materials. According to the method provided by the invention, through extraction of shellac particles, the shellac particles are subjected to a saponification reaction to make an ester bond in shellac broken to form a free carbonylgroup, aleutric acid in the shellac is effectively extracted, and a nitro group is grafted by oxidation of concentrated nitric acid; because active groups on the molecular structure of the shellac particles are subjected to crosslinking among structural units under the action of a cross-linking agent, small spherical material points are cross-linked to form a spatial reticulate body structure; dueto electrostatic interaction of a large number of hydrophilic groups on a molecular chain and water, a certain amount of free water is wrapped by the formed spatial reticulate body structure, the formed spatial reticulate structure has almost no wrapping effects on oil, through the accumulation effect in seepage pore channels, high breakthrough pressure is formed in a highly-permeable layer, so that the purpose of profile control is achieved, and the profile control performance of the profile control agent prepared by the method provided by the invention is effectively improved.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature-resistant and stable gel profile control agent material, which belongs to the technical field of mining materials. Background technique [0002] Oil well water production is one of the common problems in the process of secondary and tertiary oil recovery in oil fields. Due to the heterogeneity of the primary formation, the fluid mobility ratio and human factors (such as wrong measures, operation failure, etc.), water channeling or flooding is caused, resulting in premature water breakthrough and reduced productivity of production wells. Profile control and water shutoff technology is one of the efficient production and injection measures developed to solve problems such as uneven water absorption profile of reservoirs and ineffective circulation of water flooding. However, the oilfield is currently in the late stage of high water cut production, and the water flooding problem is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/512C08J3/24C08L33/26C08L93/02
CPCC08J3/246C08J2333/26C08J2493/02C09K8/512
Inventor 周雯蒋益
Owner 常州聚盛节能工程有限公司
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