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A surfactant composition is provided

A technology of surfactant and composition, applied in the field of surfactant composition, can solve the problems of difficult selection of oil displacement system, high salinity of formation water, deep burial, etc., so as to improve oil recovery rate and temperature resistance. Effect of salt resistance, high displacement efficiency

Inactive Publication Date: 2020-04-28
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Water injection test was carried out in the early stage of Tahe clastic rock reservoir, but the effect was not obvious
In addition, the Tahe oil reservoir has deep burial, high formation pressure (about 45MPa), high formation temperature (about 90-125°C), and high formation water salinity (18 to 23×10 4 mg / L or more), which brings difficulties to the selection of oil displacement system (to meet the requirements of high temperature resistance and high salt)

Method used

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  • A surfactant composition is provided

Examples

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Effect test

Embodiment 1

[0020] Will C 16 Sodium α-alkenyl sulfonate (purchased from Henan Weixi Trading Co., Ltd.), cetyl dimethyl betaine (purchased from Shanghai Shengxuan Biochemical Co., Ltd.), the degree of hydrolysis is 15%, and the relative molecular weight is 11 million Polyacrylamide (purchased from Zhengzhou Anlu Environmental Protection Equipment Co., Ltd.), stearylamide (purchased from Hubei Xinmingtai Chemical Co., Ltd.) was mixed in a mass ratio of 10:1:5:3 formulated, and then dissolved in a salinity of 2.24×10 5 ppm of formation water, forming a 0.3% surfactant aqueous solution.

Embodiment 2

[0022] Will C 18 Sodium α-alkenyl sulfonate (purchased from Henan Weixi Trading Co., Ltd.), dodecyl dimethyl betaine (purchased from Shanghai Shengxuan Biochemical Co., Ltd.), the degree of hydrolysis is 15%, and the relative molecular weight is 11 million Polyacrylamide (purchased from Zhengzhou Anlu Environmental Protection Equipment Co., Ltd.) and cetyl alcohol amide (purchased from Hubei Xinmingtai Chemical Co., Ltd.) were mixed according to the mass ratio of 10:1:5:3, and then dissolved in Salinity is 2.25×10 5 ppm of formation water, forming a 0.35% surfactant aqueous solution.

Embodiment 3

[0024] Will C 14 Sodium α-alkenyl sulfonate (purchased from Henan Weixi Trading Co., Ltd.), tetradecyl dimethyl betaine (purchased from Shanghai Shengxuan Biochemical Co., Ltd.), the degree of hydrolysis is 15%, and the relative molecular weight is 11 million Polyacrylamide (purchased from Zhengzhou Anlu Environmental Protection Equipment Co., Ltd.) and eicosanolamide (purchased from Hubei Xinmingtai Chemical Co., Ltd.) were mixed in a mass ratio of 10:1:5:3, and then dissolved in Salinity is 2.21×10 5 ppm of formation water, forming a 0.4% surfactant aqueous solution.

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Abstract

The invention provides a surfactant composition, which is prepared from alpha-alkenyl sulfonate, alkyl dimethyl betaine, partially hydrolyzed polyacrylamide and alkanolamide. According to the surfactant composition, the temperature resistance and the salt resistance are remarkably improved, the adsorption on oil reservoir rocks is reduced, and a system has high displacement efficiency, so that thepurpose of further improving the crude oil recovery ratio is achieved.

Description

technical field [0001] The application provides a surfactant composition. Background technique [0002] Surfactant displacement technology in clastic rock reservoirs at home and abroad is currently in a relatively perfect stage. After water flooding in most oilfields in my country, there are still about 65% of the crude oil in the deposits that cannot be extracted. Chemical flooding plays a leading role in enhancing oil recovery. Surfactants, as oil displacement agents for tertiary oil recovery, can greatly improve oil displacement efficiency compared with water flooding and polymer flooding. [0003] The development of tertiary oil recovery technology has higher and higher requirements for surfactants, not only requiring it to have low oil-water interfacial tension and low adsorption value, but also requiring it to be compatible with reservoir fluids and cheap. Under the current oil price situation, the cost of surfactant is the main factor restricting the development of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 赵海洋伍亚军郭娜李亮吴文明刘广燕任波张潇王建海李肃马淑芬杨祖国谭辉丁保东甄建伟
Owner CHINA PETROLEUM & CHEM CORP
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