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Profile control and water plugging agent and method for oil field

A profile control water shutoff agent and a profile control water shutoff technology, applied in chemical instruments and methods, earthwork drilling, mining fluids, etc., can solve the problems of poor profile control water shutoff polymer profile control and water shutoff effect, and achieve The effects of small stratum salinity, improved operation efficiency, and flexible implementation process

Active Publication Date: 2013-10-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned existing oilfield profile control and water shutoff methods all realize the underground in-situ polymerization method, thus eliminating the need for surface polymerization, drying, granulation, screening and injection injection, etc., according to the above oilfield profile control and water shutoff The profile control and water shutoff effect of the profile control and water shutoff polymer formed by the method is not good, and needs to be further improved

Method used

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  • Profile control and water plugging agent and method for oil field

Examples

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Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment is used to illustrate the oilfield profile control water shutoff agent and the oilfield profile control water shutoff method of the present invention.

[0039] A mixture of 100 parts by weight of acrylic acid, 300 parts by weight of sodium lignosulfonate and 100 parts by weight of water is injected into the oil field formation at a temperature of 80°C, and then 1.5 parts by weight of ammonium persulfate and 10 parts by weight of ammonium persulfate are injected into the oil field formation. A mixture of parts by weight of water.

Embodiment 2

[0043] This embodiment is used to illustrate the oilfield profile control water shutoff agent and the oilfield profile control water shutoff method of the present invention.

[0044] 100 parts by weight of acrylic acid, 1.5 parts by weight of ammonium persulfate, 300 parts by weight of sodium lignosulfonate and 110 parts by weight of water were mixed, and the resulting mixture was injected into an oilfield formation at a temperature of 80°C.

Embodiment 3

[0046] This embodiment is used to illustrate the oilfield profile control water shutoff agent and the oilfield profile control water shutoff method of the present invention.

[0047] According to the method of Example 1, oilfield profile control and water shutoff are implemented, except that acrylamide of the same weight is used instead of acrylic acid.

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Abstract

The invention provides a profile control and water plugging agent for an oil field. The profile control and water plugging agent contains polymerizable polymer monomers, lignosulfonate and initiators, wherein the initiators are preserved independent from the polymerizable polymer monomers and the lignosulfonate. The invention further provides a profile control and water plugging method for the oil field. The profile control and water plugging method comprises the following steps of: injecting the polymerizable polymer monomers, the lignosulfonate and the initiators into a ground layer required to be subjected to profile control and water plugging, and carrying out a polymerization reaction under the ground layer temperature. With the adoption of the profile control and water plugging method and the profile control and water plugging agent, a relatively good profile control and water plugging effect can be achieved.

Description

technical field [0001] The invention relates to an oilfield profile control water shutoff agent and an oilfield profile control water shutoff method. Background technique [0002] Due to the heterogeneity of primary and secondary formations, differences in fluid mobility, and other reasons (such as operation failures, wrong production measures, etc.), dominant water flow channels are formed in the formations, resulting in water cones, water channeling, and water fingering, causing some Oil wells break through water or flood out prematurely, and water flooding is inefficient or ineffective in circulation. Therefore, the profile control and water shutoff technology is an effective means for oilfields to improve the development effect of water flooding and realize the stable production of oil reservoirs. The purpose of profile control and water shutoff is to improve the development effect of water flooding, increase the swept volume of injected water in the oil layer, and then...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588E21B43/22C08F120/06C08F220/06C08F222/02
Inventor 李伟王征王秀
Owner CHINA PETROLEUM & CHEM CORP
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