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Oil field profile control and water shutoff method

A technology for profile control, water shutoff and oilfield application in chemical instruments and methods, earthwork drilling, production fluids, etc. It can solve the problems of poor temperature and salt resistance, achieve excellent temperature and salt resistance, flexible implementation process, The effect of low stratum salinity

Inactive 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

[0006] The purpose of the present invention is to provide a new oilfield profile control and water shutoff method in order to overcome the disadvantages of poor temperature and salt resistance of the profile control water shutoff polymer formed by the existing oilfield profile control and water shutoff method. The formed profile control and water shutoff polymer has good temperature and salt resistance

Method used

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  • Oil field profile control and water shutoff method
  • Oil field profile control and water shutoff method
  • Oil field profile control and water shutoff method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] This embodiment is used to illustrate the oilfield profile control and water shutoff method of the present invention.

[0033] A mixture of 100 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid (purchased from Sinopharm Chemical Reagent Co., Ltd.) and 100 parts by weight of water is injected into the oilfield formation at a temperature of 80 ° C, and then injected into the A mixture of 1.5 parts by weight of ammonium persulfate and 10 parts by weight of water is injected into the oilfield formation.

Embodiment 2

[0037] This embodiment is used to illustrate the oilfield profile control and water shutoff method of the present invention.

[0038] 100 parts by weight of 2-acrylamido-2-methylpropanesulfonic acid (purchased from Sinopharm Chemical Reagent Co., Ltd.), 1.5 parts by weight of ammonium persulfate and 110 parts by weight of water are mixed, and then the resulting mixture is injected into In oilfield formations with a temperature of 80°C.

Embodiment 3

[0040] This embodiment is used to illustrate the oilfield profile control and water shutoff method of the present invention.

[0041] According to the method of Example 1, oilfield profile control and water shutoff were implemented, except that 2-acrylamido-2-methylpropanesulfonic acid was replaced with the same weight of itaconic acid.

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Abstract

The invention discloses an oil field profile control and water shutoff method. The method includes injecting polymerizable polymer monomers and initiators into a stratum which needs profile control and water shutoff, and initiating polymerization reaction at the temperature of the stratum, wherein the polymerizable polymer monomers contain at least one of maleic acid, itaconic acid and 2-acrylamide-2- methyl propanesulfonic acid. According to the oil field profile control and water shutoff method, good profile control and water shutoff effects can be acquired.

Description

technical field [0001] The invention relates to a method for oilfield profile control and water shutoff. 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 increase the recovery factor of water floodi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22C09K8/588C09K8/44
Inventor 李伟
Owner CHINA PETROLEUM & CHEM CORP
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