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Preparation methods of organic chromium cross-linking agent and organic chromium gel profile controlling system

An organic chromium and cross-linking agent technology, applied in chemical instruments and methods, drilling compositions and other directions, can solve problems such as the decrease in drilling speed, and achieve the effects of long duration of effect, simple process and cost reduction.

Active Publication Date: 2014-04-02
ANTON OILFIELD SERVICES (GRP) LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to further eliminate the hazards of the profile control system to the mud performance, and solve the problems such as the decrease of the drilling speed

Method used

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  • Preparation methods of organic chromium cross-linking agent and organic chromium gel profile controlling system
  • Preparation methods of organic chromium cross-linking agent and organic chromium gel profile controlling system

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Embodiment Construction

[0025] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the organic chromium gel profile control system proposed according to the present invention, as well as the preparation method and use of the profile control system are described below in conjunction with the preferred embodiments. The method is described in detail below.

[0026] The preparation method embodiment of organic chromium crosslinking agent

[0027] A preparation method of an organic chromium crosslinking agent, comprising the following steps:

[0028] Step 1: Add glacial acetic acid while stirring in water, wherein the mass ratio of water to glacial acetic acid is 7:2;

[0029] The second step: in the solution of the first step, add potassium dichromate while stirring, wherein the mass ratio of potassium dichromate to glacial acetic acid is 1:2;

[0030] The third step: In the solution in the second step, slowly add sodium...

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Abstract

The invention discloses preparation methods of an organic chromium cross-linking agent and an organic chromium gel profile controlling system. The preparation method of the organic chromium cross-linking agent comprises the steps of adding 2 parts of glacial acetic acid to 7 parts of water; adding 1 part of potassium dichromate while stirring; finally, adding 4 parts of sodium thiosulfate slowly while stirring to obtain a solution which is an organic chromium cross-linking agent. The preparation method of the organic chromium gel profile controlling system comprises the steps of preparing a 0.5% sodium chloride solution in a container; uniformly adding polyacrylamide uniformly, wherein mass ratio of polyacrylamide to sodium chloride is 3: 5; adding the organic chromium cross-linking agent, wherein concentration of the organic chromium cross-linking agent is 0.3%. The organic chromium gel profile controlling system disclosed by the invention is stable in performance, good in anti-swelling effect, low in pollution on oil reservoir, low in corrosion, good in temperature resistance and convenient for field use.

Description

technical field [0001] The invention relates to a preparation method of an organic chromium crosslinking agent and an organic chromium gel profile control system. Background technique [0002] Water plugging and profile control and related supporting technologies play an important role in water control and stable production (increase production) measures in high water-cut oilfields. The continuous innovation and development of water plugging and profile control and related technologies, especially in recent years, has made many new progresses in the research and application of deep profile control (regulation and flooding) liquid flow diversion agents, forming weak gels, colloidal dispersion gels ( CDG), bulky granules, flexible granules and other deep profile control (modulation and flooding) technologies play an important role in improving the water flooding development effect and enhancing the recovery factor of high water-cut oilfields in my country. However, the existing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/512C08J3/24
CPCC08J3/244C09K8/5083C09K8/512
Inventor 韩广彬孟凡斌史瀚文
Owner ANTON OILFIELD SERVICES (GRP) LTD
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