High-temperature-resistance gas well liquid anti-salt foam scrubbing agent

Abstract

The invention discloses a high-temperature-resistance gas well liquid anti-salt foam scrubbing agent, which aims to solve the problems that an existing foam scrubbing agent cannot meet the requirements of low cost, high solubility, high temperature resistance, salt resistance and remarkable foaming and foam-stabling performance. The foam scrubbing agent is prepared from the following components inparts by weight: 3-8 parts of N,N',N''-pentasodium diethylenetriaminepentaacetate, 4-9 parts of N-dodecyl-N,N-dimethylglycine, 2-5 parts of sodium dodecyl benzene sulfonate, 1-2 parts of galactomannan and 5-10 parts of dodecyl-2-hydroxy-1-proply sulfobetaine. The high-temperature-resistance gas well liquid anti-salt foam scrubbing agent can effectively achieve the effects of low cost, high solubility, high temperature resistance, salt resistance and remarkable foaming, and has a remarkable foam stabilizing effect.

Description

technical field [0001] The invention relates to a foaming agent, in particular to a high temperature-resistant gas well liquid anti-salt foaming agent. Background technique [0002] Foam drainage gas recovery technology has played an important role in the development of gas wells with water. It not only greatly improves the liquid-carrying capacity of gas, reduces wellbore fluid accumulation, but also prolongs the later production time of gas wells, thereby improving the ultimate recovery. [0003] As the ambient temperature rises, the foaming ability and stability of the foaming agent will be greatly reduced, especially in high-temperature formations above 100°C, the foam produced by many foaming agents will disappear within a few minutes, or even no foam will be produced. [0004] In the process of field application in gas fields, the high oil content environment in gas wells has a great impact on the foam drainage process of conventional products on the market, making it ...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the foam discharge agent in the prior art cannot meet the requirements of low cost, high solubility, high temperature resistance, salt resistance, foaming and foam stabilizing ability at the same time, and the purpose is to provide a solution High temperature resistant gas well liquid anti-salt foam discharge agent for the above problems

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