Foam discharge agent for gas well drainage and gas recovery

A technology of drainage and gas extraction and foam discharge agent, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problem that the foam discharge agent does not have low pH value and high temperature resistance performance, and the foam discharge agent does not have high resistance. Salt comprehensive performance and other issues, to achieve good water-carrying effect, excellent foaming performance, good foam stability
CN104140802BActive Publication Date: 2018-07-10CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2018-07-10

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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 bubble discharge agent for gas well drainage and gas production, and belongs to the technical field of oil and gas field chemical agents. Background technique

[0002] Foam drainage gas recovery is a drainage aid technology that adds foam drainage agent (abbreviated as foam drainage agent) to the gas well. It can easily achieve the purpose of clearing the bottom of the well and improving the mining efficiency without affecting the production and construction of the gas well. Simple, so it is widely used. When the temperature and salinity of the working conditions increase, the foaming ability and stability of the foaming agent are greatly reduced, resulting in failure. With the emergence of various special situations in newly developed gas fields, the applicable foaming agent is required to have comprehensive performance in many aspects. For example, the newly developed Puguang gas field and Yuanba gas field in the Sichuan Basin...

Claims

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