Thermothickening terpolymer, its preparation method and application

A heat-thickening terpolymer and terpolymer technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve unstable performance, easy hydrolysis of ester bonds, affecting polymer stability, etc. problems, achieve high apparent viscosity, good hydrolysis resistance, and good application prospects
CN102464781AActive Publication Date: 2012-05-23CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2012-05-23

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Abstract

The invention provides a thermothickening terpolymer and its preparation method. The water solution viscosity of the copolymer provided in the invention increases with the rise of temperature within a certain temperature range. The water solution of the copolymer has a thermothickening property, and has high apparent viscosity under high temperature and high salinity conditions. Thus, the terpolymer of the invention boasts good application prospects in tertiary oil recovery of high temperature and high salinity oil reservoirs.
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Description

technical field

[0001] The invention relates to a water-soluble polymer and a preparation method thereof, in particular to a water-soluble terpolymer with thermal thickening property, which belongs to the field of oilfield chemicals. Background technique

[0002] Polymer flooding technology is an important enhanced oil recovery technology. Its basic principle is to add water-soluble polymers to the injection water to increase the viscosity of the aqueous solution, reduce the water / mobility ratio, expand the swept volume, and increase the Sweep efficiency, reducing oil saturation in the swept zone, thereby enhancing oil recovery. So far, polymer flooding crude oil production accounted for more than 20% of oil field crude oil production. Practice has proved that the use of polymer flooding can greatly improve oil recovery, resulting in huge economic and social benefits. For many years, the polymer used in polymer flooding is mainly artificially synthesized partially hydrolyz...

Claims

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