Oil-resistant foaming agent and preparation method thereof

A foaming agent and a technology for the preparation process, which are applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of high cost of fluorocarbon surfactants, poor drainage and liquid-carrying effect of oil-resistant foaming agents, and the like. The effect of good foam stability, strong foaming ability and long validity period

Active Publication Date: 2015-03-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of poor drainage and liqui

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In order to solve the problems of poor drainage and liquid-carrying effect of existing oil-resistant foaming agents and high cost of fluorocarbon surfactants. The invention provides an anti-oil foaming agent, which consists of 50-70% by weight of alkyl propyl betaine, 5-15% by weight of anionic surfactant, 10-20% by weight of ten It consists of hexaalkyltrimethylammonium bromide and 10-20% water by weight, wherein the alkyl propyl betaine is lauryl amidopropyl betaine.

[0015] The anti-oil foaming agent of this example is composed of the following components: 70% lauryl amidopropyl betaine, 5% sodium cetylsulfonate, 10% cetyltrimethylammonium bromide, and 15% water After compounding, the foaming capacity can reach 184mm, and the liquid carrying rate is 77% in 15 minutes. When the condensate oil content is 30%, the liquid carrying rate can reach 62%.

[0016] Preparation process of anti-oil foaming agent: add 5% by weight anionic surfactant in proportion to 15% by ...

Embodiment 2

[0022] The anti-oil foaming agent of this example is composed of the following components: 60% lauryl amidopropyl betaine, 10% sodium cetylsulfonate, 15% cetyltrimethylammonium bromide, and 15% water After compounding, the foaming capacity can reach 184mm, and the liquid carrying rate is 77% in 15 minutes. When the condensate oil content is 30%, the liquid carrying rate can reach 62%.

Embodiment 3

[0024] The anti-oil foaming agent of this example is composed of the following components: 50% lauryl amidopropyl betaine, 15% sodium cetylsulfonate, 20% cetyltrimethylammonium bromide, and 15% water After compounding, the foaming capacity can reach 184mm, and the liquid carrying rate is 77% in 15 minutes. When the condensate oil content is 30%, the liquid carrying rate can reach 65%.

[0025] In summary, the oil-resistant foaming agent of the present invention has strong foaming ability after being added to water-producing gas wells, and good foam stability. For condensate-producing oil and gas wells, the liquid-carrying ability is still strong, and it is suitable for moderate salinity, Used in water-producing gas wells containing condensate.

[0026] The oil-resistant foaming agent has an anti-salinity ability of 250g / L, an anti-condensate oil ability of 30%, and an anti-methanol ability of 20%. Under the condition of a condensate oil content of 30%, its foaming ability can ...

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Abstract

The invention belongs to the technical field of oil and gas field chemical engineering, and particularly relates to an oil-resistant foaming agent. The oil-resistant foaming agent comprises, in percentage by weight, 50-70% of alkyl propyl betaine, 5-15% of an anionic surfactant, 10-20% of cetyl trimethyl ammonium bromide and 10-20% of water. The oil-resistant foaming agent is high in foaming capacity and high in foam stability after added to water-producing gas wells, still high in liquid carrying capacity for gas-condensate-producing gas wells, and applicable to gas-condensate-containing water-producing gas wells with moderate mineralization degrees.

Description

technical field [0001] The invention belongs to the technical field of oil and gas fields, and in particular relates to an anti-oil foaming agent. Background technique [0002] When the natural gas well is in normal production, the liquid is carried to the surface with the agitation of the gas flow, but when its own energy is not enough to carry the liquid in the well, it is necessary to artificially add energy to the gas well to make the liquid in the gas well drain from the ground. [0003] Foam drainage gas recovery has become the main technology of drainage and gas recovery in most gas fields due to its advantages of low cost, quick effect, simple equipment, easy construction and no influence on the normal production of gas wells. Water-foaming surfactants, when the bottom water comes into contact with the foaming agent, a large amount of low-density water-containing foam is generated by the agitation of the natural gas flow, which is carried from the bottom of the well ...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 惠艳妮付钢旦贾友亮田伟刘双全李辰杨亚聪李旭日赵彬彬李耀德崔丽春
Owner PETROCHINA CO LTD
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