Enhanced high temperature resistant foam drainage agent composition and its preparation method and gas recovery method

Abstract

The invention relates to a reinforced high temperature resistant foam drainage composition, a preparation method and a gas extraction method. It mainly solves the problems of low-pressure, high-temperature deep gas wells in the later stage of development, due to the reduction of gas volume, the bottom-hole fluid is difficult to discharge efficiently, and the production of gas wells is reduced or even stopped. The present invention adopts a foam drainage composition, which comprises the following components in parts by mass: (1) 1 part of alkylamine polyether; (2) 0.1 to 50 parts of hydrocarbyl polyether betaine; (3) ) 0.1-100 parts of strengthening additive A; (4) the technical scheme of 0.1-100 parts of strengthening additive B, which solves this problem well and can be used in the drainage and gas recovery industry of low-pressure, high-temperature deep gas wells.

Description

technical field [0001] The invention relates to a reinforced high-temperature resistant foam drainage composition and a preparation method thereof, in particular to a reinforced high-temperature resistant foam drainage composition for low-pressure, high-temperature deep gas wells and a preparation method thereof. Background technique [0002] As gas field mining enters the later stage of development, gas production pressure gradually decreases, water-producing gas wells increase year by year, and wellbore fluid accumulation becomes more and more serious, resulting in continuous decline in gas well production, and even water flooded wells, which has become a key problem restricting the normal production of gas wells. Foam drainage gas recovery is a drainage gas recovery technology developed rapidly at home and abroad in recent years. It has the advantages of simple equipment, convenient construction, low cost, wide range of applicable well depths, and does not affect the norma...

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that for gas wells with low gas production in the middle and later stages of development in the prior art, the foam generation capacity of the foam discharge agent is insufficient, and the liquid-carrying efficiency is low. In the method of self-generated foam drainage, there are problems of large amount of chemicals used, high cost, and difficult disposal of the effluent, and for high-temperature deep gas wells, the traditional foam drainage agent has poor temperature resistance and is easy to decompose when encountering high temperatures. An enhanced high temperature resistant foam drainage agent composition for deep gas well drainage and gas recovery. The composition has good foam generation ability and high liquid-carrying efficiency in gas wells with low gas production, and has low dosage and low cost. And easy drainage treatment, and high temperature resistance, etc.

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