Foam drainage agent for gas well drainage gas recovery

A technology of water drainage and gas recovery and foaming agent, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., and can solve the problem that the foaming agent does not have low pH value resistance, high temperature resistance, and the foaming agent does not have high resistance Salt comprehensive performance and other issues, to achieve the effect of good water carrying effect, excellent foaming performance, good foam stability
CN104140802AActive Publication Date: 2014-11-12CHINA 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
2014-11-12

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Abstract

Belonging to the technical field of oil-gas field chemical agents, the invention relates to a foaming drainage agent for gas well drainage gas recovery. The foaming drainage agent for gas well drainage gas recovery is formed by mixing of a gemini surfactant, a zwitterionic surfactant, a high-bond energy surfactant and a macromolecular polymer. The foaming drainage agent provided by the invention has high temperature environment resistance (up to 180DEG C), suitability to environment with wide pH value (of 1-10), high mineralization degree resistance (greater than or equal to 320000mg / L), and resistance to hydrogen sulfide and carbon dioxide atmosphere (with the hydrogen sulfide partial pressure being greater than or equal to 25% and the carbon dioxide partial pressure being greater than or equal to 20%). And the foaming drainage agent also has the advantages of excellent foaming performance, good foam stability, good water-carrying effect, low surface tension, and foam volume mostly higher than 8 times.
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Description

technical field

[0001] The invention relates to a foaming agent for gas well drainage and gas recovery, which belongs to the technical field of chemical agents for oil and gas fields. Background technique

[0002] Foam drainage gas recovery is a drainage aiding process that adds foam drainage agent (referred to as foam drainage agent) to the gas well, which can easily achieve the purpose of clearing the bottom fluid and improving the production efficiency without affecting the production and construction of the gas well. Simple and therefore widely used. When the temperature and salinity of the working conditions increase, the foaming ability and stability of the foaming agent will be greatly reduced, resulting in failure. With the emergence of various special conditions of gas wells in newly developed gas fields, it is required that the applicable foaming agent has comprehensive performance in many aspects. For example, the newly developed Puguang Gas Field and Yuanba Gas...

Claims

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