Processing method of polymer containing waste liquid, and compound profile control agent

A treatment method and waste liquid technology, applied in chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve problems such as high cost of profile control, difficult to handle waste liquid containing poly, and achieve good fluidity, Reduce the cost of profile control construction and meet the plugging performance of plugging agent

Inactive Publication Date: 2019-11-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0006] In view of the above-mentioned prior art, in order to solve the problems of difficult treatment of polymer-containing waste liquid and the high cost of profile control in oilfields in the eastern old areas, the present invention provides a treatment method for polymer-containing waste liquid. Liquid and polymer injection station waste liquid into composite particle reinforced jelly plugging agent

Method used

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  • Processing method of polymer containing waste liquid, and compound profile control agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Proceed as follows:

[0029] (1) Use the ground waste liquid treatment device (the technical scheme recorded in the Chinese invention patent CN 206000519 U) to separate the waste liquid containing polymer; filter out the colloid in the waste liquid containing polymer, and pulverize the filtered colloid to obtain Colloidal particles (diameter 1-3mm), spare;

[0030] (2) Add an appropriate amount of water to the polymer-containing waste liquid after filtering out the colloid, then add the suspending agent, stir and mature for 2 hours, and then add the dispersant, cross-linking agent and colloid particles in sequence under the condition of uninterrupted stirring, and stir In 30 minutes, a composite particle jelly plugging agent is formed, which is a compound profile control agent. The weight percentages of each component are: suspending agent 0.2%, dispersing agent 0.1%, crosslinking agent 0.15%, colloidal particles 12%, The balance is poly-containing waste liquid and wat...

Embodiment 2

[0036]Same as Example 1, the difference is: 0.25% of suspending agent, 0.1% of dispersant, 0.2% of crosslinking agent, 1% of colloidal particles, and the balance is containing polymer waste liquid and water. The dispersant is alkylbenzene sulfonate.

Embodiment 3

[0038] Same as Example 1, the difference is: 0.15% of suspending agent, 0.3% of dispersant, 0.15% of crosslinking agent, 5% of colloidal particles, and the balance is containing polymer waste liquid and water.

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Abstract

The invention provides a processing method of polymer containing waste liquid, and a compound profile control agent, and belongs to the field of oil field waste liquid processing. The processing method comprises following steps: 1, colloid in polymer containing waste liquid is removed through filtering, filtered colloid is crushed to obtain colloid particles; 2, a suspending agent, a dispersant, acrosslinking agent, the colloid particles, and water are added into the polymer containing waste liquid processed through colloid filtering, uniform mixing is carried out so as to obtain the compoundprofile control agent, wherein the suspending agent is high molecular weight polyacrylamide, the dispersant is an anionic surfactant, and the crosslinking agent is water soluble phenolic resin. The compound profile control agent is composed of the suspending agent, the dispersant, the crosslinking agent, the colloid particles, the polymer containing waste liquid, and water. According to the processing method, after gel forming of the compound profile control agent, requirements on plugging agent plugging performance, temperature resistance, and stability are satisfied, using in oil field water shut-off and profile control production can be realized. The processing method is capable of solving problems in the prior art that original injection polymer zone waste liquid processing is difficult, cost is high, environment pollution is easily caused, and clean environment protection development production requirements can be satisfied.

Description

technical field [0001] The invention relates to the treatment of oilfield waste liquid, in particular to a treatment method for waste liquid containing poly, and also relates to a compound profile control agent prepared by the method. Background technique [0002] With the continuous deepening of oilfield development, chemical flooding has become an important means for the development and stable production of oilfields in the eastern mature areas. Polymer flooding is the main field of chemical flooding tests. With the continuous expansion of its scale, the problem of waste liquid treatment in development and production has become increasingly prominent. At present, the waste liquid generated in the polymer injection area of ​​Shengli Oilfield mainly comes from three sources: one is the waste liquid generated from well washing and operation in the polymer injection area; Polymerized sewage, the waste liquid containing polymeric particles produced in the tank. The main compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/512E21B33/13
CPCC09K8/512E21B33/13
Inventor 袁杰崔洁王桂勋唐洪涛李健康王建冯伟邢煜孙双立刘芬
Owner CHINA PETROLEUM & CHEM CORP
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