Functional polymeric surfactant reinforced combination flooding composition and application thereof

A technology of surfactants and polymers, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of difficult control of foam formation and stability, difficulty in industrial application, high risk of on-site implementation, etc., to achieve improved Oil recovery, low cost, and the effect of reducing interfacial tension between oil and water

Inactive Publication Date: 2015-02-04
大连东方创新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Micellar flooding can theoretically recover "almost" all the crude oil in the formation, but due to the use of high concentrations of surfactants and a large amount of alcohol, the cost is too high and it is difficult to realize industrial application
[0005] Foam composite flooding can also greatly increase oil recovery, but the formation and stabilization of foam is difficult to control in the formation, and the on-site implementation is risky

Method used

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  • Functional polymeric surfactant reinforced combination flooding composition and application thereof
  • Functional polymeric surfactant reinforced combination flooding composition and application thereof
  • Functional polymeric surfactant reinforced combination flooding composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Polymer: The water-soluble polymer is partially hydrolyzed polyacrylamide HPAM, produced by Daqing Refining and Chemical Company, with a molecular weight of 25 million.

[0039] (2) Sulfonate-type surfactant: Heavy alkylbenzene sulfonate is produced by Daqing Donghao Investment Co., Ltd.

[0040] (3) Functional polymer surfactant: It is prepared from three monomers of acrylamide monomer, acrylic acid monomer and polyoxyethylene (9) alkyl acrylate through free radical initiated copolymerization:

[0041]Add acrylamide monomer, hydrophilic monomer acrylic acid, functional monomer acrylic acid polyoxyethylene (9) alkyl ester and sodium carbonate in a three-necked flask, dissolve in deionized water, add sodium formate and ammonia water, the total mass is three-necked flask 30% of the volume of the flask; under the protection of nitrogen, add azobisisobutyronitrile, sodium hydrogen sulfate and sodium persulfate, which is 0.05% of the total mass; seal the reaction for 3 h...

Embodiment 2

[0075] (1) polymer: with embodiment 1.

[0076] (2) Sulfonate-type surfactant: petroleum sulfonate is produced by Daqing Refining and Chemical Company.

[0077] (3) functional polymer surfactant: with embodiment 1.

[0078] (4) Nonionic surfactant: with embodiment 1.

[0079] Composition of enhanced composite flooding composition:

[0080]

Embodiment 3

[0101] (1) Polymer: heat-resistant and salt-resistant polymer, produced by Beijing Hengju Chemical Group Co., Ltd., with an average molecular weight of 19 million.

[0102] (2) Sulfonate-type surfactant: C14-C20 mixed alkylbenzene sulfonate, self-synthesized, alkylation reaction of C14-C20 mixed α-olefin and benzene under the catalyst of aluminum trichloride, and then Those obtained by sulfonation and neutralization can be relatively easily completed by those skilled in the art by using methods in the prior art.

[0103] (3) Functional polymer surfactant: Example 1 at the same time.

[0104] (4) Non-ionic surfactant: m-xylyl octadecyl alcohol polyoxypropylene (5) polyoxyethylene (20) ether, self-synthesized, first mixed with polyoxypropylene (5PO) in m-xylyl octadecyl alcohol Carry out ring-opening reaction under basic catalyst, then carry out ethoxylation reaction with ethylene oxide (20EO) under basic catalyst to obtain, those of ordinary skill in the art can adopt the meth...

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Abstract

A functional polymeric surfactant reinforced combination flooding composition contains the following ingredients, by weight, 0.05-0.5% of polymer, 0.03-0.5% of a sulfonate surfactant, 0.01-0.3% of a functional polymeric surfactant, 0.0-0.3% of a nonionic surfactant, 0.2-1.5% of alkali and the balance water. The functional polymeric surfactant is a copolymer of an acrylamide monomer and/or a hydrophilic monomer and/or a functional monomer. According to the reinforced combination flooding composition, multiple oil-displacement mechanisms are combined. In a low-concentration system, the purpose that a three-compounds combination flooding has higher crude oil recovery can be achieved. After polymer flooding, oil reservoir also has a certain effect of raising crude oil recovery.

Description

technical field [0001] The invention relates to a functional polymer surfactant-enhanced composite flooding composition and its application, which belongs to the technical field of petroleum exploitation. Background technique [0002] Polymer flooding can increase oil recovery by more than 10%. Polymer flooding technology has been applied industrially in major oil fields in China. [0003] Polymer-surfactant-alkali triple compound oil flooding technology, laboratory research and field tests have confirmed that it can increase oil recovery by more than 20%, and it has been industrialized in Canada, the United States, China's Daqing and Shengli oilfields. [0004] In theory, micellar flooding can recover "almost" all the crude oil in the formation, but due to the use of high concentrations of surfactants and a large amount of alcohol, the cost is too high to realize industrial application. [0005] Foam composite flooding can also greatly increase oil recovery, but the format...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588C09K8/584
CPCC09K8/588C09K8/584
Inventor 刘春德
Owner 大连东方创新科技有限公司
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