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Functional temperature-resistant anti-salt profile control agent and preparation method thereof

A temperature-resistant, salt-resistant, functional technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of affecting the ultimate recovery of oilfields, the overall performance of the gel cannot be guaranteed, affecting the formation stability and Issues such as validity period, to achieve the effect of being suitable for popularization, controllable gelation time, and improving dissolution performance

Active Publication Date: 2019-02-22
华鼎鸿基采油技术服务(北京)有限公司
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Problems solved by technology

In short, high temperature or high salt will make the overall performance of the gel not guaranteed, which will affect its stability and validity period in the formation, and affect the ultimate recovery of the oil field.

Method used

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  • Functional temperature-resistant anti-salt profile control agent and preparation method thereof
  • Functional temperature-resistant anti-salt profile control agent and preparation method thereof
  • Functional temperature-resistant anti-salt profile control agent and preparation method thereof

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preparation example Construction

[0061] The present invention also provides a method for preparing the above functional acrylamide prepolymer, which includes: mixing acrylamide, a compound represented by formula (A) and a compound represented by formula (B) in water, and adding an initiator After the reaction, hydrolyze to obtain a functional acrylamide prepolymer; the mass ratio of the acrylamide, the compound of formula (A) and the compound of formula (B) is (30-70): (17 ~38): (3 ~ 13);

[0062]

[0063] m is an integer from 1 to 5;

[0064] R 1 Alkyl selected from C1~C3;

[0065] R 2 Selected from alkyl sulfonate groups, the number of carbon atoms of the alkyl group in the alkyl sulfonate group is 1 to 2;

[0066] R 3 It is selected from the alkyl alcohol hydroxyl group, the number of carbon atoms of the alkyl group in the alkyl alcohol hydroxyl group is 1 to 3;

[0067] R 4 It is selected from alkyl carboxylate groups; the number of carbon atoms of the alkyl group in the alkyl carboxylate groups is 1-2.

[0068] W...

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Abstract

The invention provides a functional temperature-resistant anti-salt profile control agent which comprises a functional acrylamide prepolymer, a cross-linking agent, a stabilizer, a performance regulator, a deoxidant and water. The functional acrylamide prepolymer is shown as a formula (I). The functional temperature-resistant anti-salt profile control agent disclosed by the invention is low in surface injection viscosity, controllable in gelatinization time, high in gelatinization strength and stable in performance, has excellent temperature-resistant anti-salt properties, has long effective stable period while acting on high-temperature (90-140 DEG C) or high-salt (40000-260000mg.L<-1>, Ca<2+>, Mg<2+>) oil deposit, can maintain excellent plugging strength for a long time, does not have anobvious dehydration sign, can obviously improve the oilfield development effect, and provides a reliable technical support for precipitation and oil increase of high water-cut oilfields in China. Thestructural formula is as shown in the specification.

Description

Technical field [0001] The invention belongs to the technical field of improving the recovery rate of crude oil, and particularly relates to a functional temperature-resistant salt-resistant plugging control agent and a preparation method thereof. Background technique [0002] In recent years, most of the oil fields in my country have been in the stage of high water cut and low output. The secondary channels produced by long-term water flooding have changed the rock frame structure and the content of cement has decreased, making the permeability 10-15 times higher than the original permeability. Strong injection has exacerbated this contradiction. Even if the radius of plug adjustment treatment is enlarged, the application effect will be significantly worse. At the same time, excessive water production has also caused a series of problems such as decline in oil well production, increased production fluid processing costs, excessive energy consumption, well bore pipeline corrosion,...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/58C08F226/02C09K8/512
CPCC08F220/56C09K8/512C09K8/887C08F220/585C08F226/02
Inventor 张宁郭晓光杨雪张久海
Owner 华鼎鸿基采油技术服务(北京)有限公司
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