Chromium system cross-linking type profile control agent

A technology of cross-linking and profile control agent, which is applied in the direction of drilling compositions, chemical instruments and methods, etc. It can solve the problems of uncontrollable sol time and long processing time, and achieve faster dissolution speed, strong product pertinence, The effect of structural stability

Inactive Publication Date: 2020-01-21
DAQING RUNHAI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of product also has some disadvantages, such as long pre-processing time and uncontrollable sol time

Method used

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  • Chromium system cross-linking type profile control agent
  • Chromium system cross-linking type profile control agent
  • Chromium system cross-linking type profile control agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A chromium system cross-linking type profile control agent of the present invention is prepared by mixing the following materials in parts by mass: 5 parts of polyacrylamide, 0.2 part of acetone, 0.5 part of aluminum sol (particle size is 12-20nm), cross-linked 0.5 parts of joint agent and 90 parts of water.

[0013] The preparation method of the crosslinking agent is as follows: dissolve the petroleum resin in acetone, stir at a constant temperature of 120°C until uniform, and obtain a wall material dispersion system, wherein the mass ratio of petroleum resin to acetone is 1:75; the wall material dispersion system Add chromium acetate and additives to the core wall system to obtain a core wall system, wherein the mass ratio of the wall material dispersion system, core material, and additives is 20:2:0.1; after the core wall system and water are mixed homogeneously, keep the temperature at 120°C for 2 hours , and finally filtered, washed and dried to obtain the cross-li...

Embodiment 2

[0015] A chromium system cross-linked profile control agent of the present invention is prepared by mixing the following substances in parts by mass: 8 parts of polyacrylamide, 0.6 parts of acetone, 1.5 parts of aluminum sol (particle size is 12-20nm), cross-linked 1.0 parts of joint agent and 98 parts of water.

[0016] The preparation method of the crosslinking agent is as follows: dissolve the petroleum resin in acetone, stir at a constant temperature of 150°C until uniform, and obtain a wall material dispersion system, wherein the mass ratio of petroleum resin to acetone is 1:90; the wall material dispersion system Add chromium acetate and additives to get the core-wall system, wherein the mass ratio of the wall material dispersion system, core material, and additives is 50:2:0.2; after the core-wall system and water are mixed homogeneously, keep the temperature at 150°C for 4 hours , and finally filtered, washed and dried to obtain the cross-linking agent. Among them, th...

Embodiment 3

[0018] A chromium system cross-linked profile control agent of the present invention is prepared by mixing the following substances in parts by mass: 6 parts of polyacrylamide, 0.4 part of acetone, 1.0 part of aluminum sol (with a particle size of 12-20nm), cross-linked 0.8 parts of joint agent and 95 parts of water.

[0019] The preparation method of the crosslinking agent is as follows: dissolve the petroleum resin in acetone, stir at a constant temperature of 135°C until uniform, and obtain a wall material dispersion system, wherein the mass ratio of petroleum resin to acetone is 1:85; the wall material dispersion system Add chromium acetate and additives to get the core wall system, wherein the mass ratio of the wall material dispersion system, core material, and additives is 40:2:0.15; after the core wall system and water are mixed homogeneously, keep the temperature at 135°C for 3 hours , and finally filtered, washed and dried to obtain the cross-linking agent. Among th...

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Abstract

The invention relates to the technical field of oil exploitation, in particular to a chromium system cross-linking type profile control agent which is formed by mixing the following substances in parts by mass: 5-8 parts of polyacrylamide, 0.2-0.6 part of a dissolution promoter, 0.5-1.5 parts of a stabilizer, 0.5-1.0 part of a cross-linking agent and 90-98 parts of water. According to the chromiumsystem cross-linking type profile control agent, the structure formed by chromium ions is stable, and the application range is wider; the dissolution promoter is added, so that the dissolution speedof all components of the product is increased, the preparation time of the product in the preparation process is greatly shortened, the working efficiency of field work is improved, and meanwhile, theerror rate of the field work can be effectively reduced; the underground profile improvement effect of the injection well is good; meanwhile, the gelatinization time can be controlled by utilizing the temperature, and the product pertinence is high.

Description

Technical field: [0001] The invention relates to the technical field of petroleum exploitation, in particular to a chromium system cross-linked profile control agent. Background technique: [0002] With the continuous development of tertiary extraction and the gradual extension of oil well production limit, the increase of water output is the main problem hindering the continuous oil extraction. At present, the most common method is to use profile control agents to maximize the service life and production life of oil wells. [0003] The profile control agent is a three-dimensional network-like three-dimensional structure formed by the reaction of the polymer and the appropriate cross-linking agent at a certain temperature and pH. Among them, the three-dimensional structure formed by the polymer formed by chromium ions is relatively stable, so it is widely used. However, this type of product also has some disadvantages, such as long pre-processing time and uncontrollable sol...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C09K8/512
CPCC09K8/512C09K8/887
Inventor于少君李图雅张作辉张作民王杰
OwnerDAQING RUNHAI TECH DEV