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Salt-resistant foaming agent as well as preparation method and application thereof

A foaming agent, a technology of dodecyl dimethyl beet, applied in the directions of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor liquid-carrying ability, poor drainage ability and the like

Inactive Publication Date: 2020-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a salt-resistant foaming agent to solve the problem of poor liquid-carrying ability of existing foaming agents under the conditions of high salinity and low active ingredient content
[0006] The second object of the present invention is to provide the preparation method of the above-mentioned anti-salt foaming agent, to solve the problem of poor liquid-carrying ability of the existing foaming agent under the conditions of high salinity and low active ingredient content
[0007] The third object of the present invention is to provide the application of the above-mentioned anti-salt foaming agent to solve the problem of poor drainage capacity of existing foaming agents when applied to gas wells with high salinity and high calcium and magnesium ion content

Method used

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  • Salt-resistant foaming agent as well as preparation method and application thereof
  • Salt-resistant foaming agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The anti-salt foaming agent of the present embodiment consists of the following components by weight percentage: 21% of cocamidopropyl amine oxide, 6% of cocoamidopropyl betaine, 3% of lauryl dimethyl betaine %, water 70%.

Embodiment 2

[0027] The anti-salt foaming agent of the present embodiment is composed of the following components by weight percentage: 35% of cocamidopropyl amine oxide, 7% of cocoamidopropyl betaine, 3% of lauryl dimethyl betaine %, water 55%.

Embodiment 3

[0029] The anti-salt foaming agent of the present embodiment is made up of the following components by weight percentage: Cocamidopropyl amine oxide 27%, Cocamidopropyl betaine 9%, Lauryl dimethyl betaine 6% %, water 58%.

[0030] In other embodiments of the anti-salt foaming agent, on the basis of the components in the above examples 1-3 of the anti-salt foaming agent, agents such as corrosion inhibitors, scale inhibitors, and methanol can be further added to meet the requirements of different gas wells. production requirements. The type of corrosion inhibitor can be imidazoline, and the addition amount can be 5%-10%. The type of scale inhibitor can be polymer, and the addition amount can be 5%-10%. After adding the above agents, the corresponding anti-salt foaming agent has good stability and has no effect on the foaming, foam stabilizing, and liquid-carrying abilities of the foaming agent, showing good compatibility.

[0031] In the following examples 1-3 of the preparat...

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Abstract

The invention relates to a salt-resistant foaming agent as well as a preparation method and application thereof. The salt-resistant foaming agent is mainly prepared from cocamidopropyl betaine, dodecyl dimethyl betaine, cocamidopropyl amine oxide and water. The total mass of cocamidopropyl betaine and dodecyl dimethyl betaine accounts for 9-15% of the mass of the salt-resistant foaming agent, andthe mass ratio of cocamidopropyl betaine to dodecyl dimethyl betaine is (1-2.4): 1; the cocamidopropyl amine oxide accounts for 21-35% of the mass of the salt-resistant foaming agent. The salt-resistant foaming agent provided by the invention has the characteristics of low concentration and high efficiency after the components are combined, still has good foamability and foam stability when the mass percent of the total effective components is as low as 30%, has strong liquid carrying capacity, and has good applicability to a foam drainage gas recovery process of a gas well with high mineralization degree and high calcium and magnesium ion content.

Description

technical field [0001] The invention belongs to the field of foaming agent (foaming agent) for foam drainage and gas recovery technology, and in particular relates to a salt-resistant foaming agent and its preparation method and application. Background technique [0002] Foam drainage and gas recovery technology is widely used in the development of water-producing gas wells in large domestic large fields. Foam drainage technology is mainly to add foaming agent to the wellbore and generate foam through air flow agitation, thereby reducing fluid density, reducing flow resistance, and improving gas well drainage. liquid effect. During the application of the foaming agent, it is easily affected by the application environment, such as formation water salinity, formation temperature, condensate oil content, etc. Each gas field needs to select a suitable foaming agent according to the characteristics of the liquid production, such as the Xiagu The average salinity of fluid product...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 刘慧狄伟李国锋刘岳龙王瑞阳李坤雨王娟娟刘伟华魏凯李璇
Owner CHINA PETROLEUM & CHEM CORP
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