Automatic throwing system for foam scrubbing agent used in foam scrubbing gas production of gas reservoir with water

Abstract

The invention relates to dedicated equipment of foam scrubbing gas production, in particular to an automatic throwing system for a foam scrubbing agent used in foam scrubbing gas production of a gas reservoir with water. The automatic throwing system comprises a foam scrubbing agent throwing device arranged above a well opening of the gas reservoir with the water, wherein the foam scrubbing agent throwing device is electrically connected with a control cabinet with a PLC control strip through a cable, the control cabinet with the PLC control strip is arranged in an operation room, and a motor of the foam scrubbing agent throwing device is controlled by the control cabinet with the PLC control strip to be started up and shut down. A detecting device is fixed to the inner wall of the gas reservoir with the water, and the detecting device is electrically connected with the control cabinet arranged in the operation room and provided with the PLC control strip through a cable. By means of the structure, the automatic throwing system has the advantages of automatically throwing the foam scrubbing agent, accurately throwing the foam scrubbing agent in real time and improving the throwing accuracy.

Description

technical field [0001] The invention relates to special equipment for gas recovery by foam row, in particular to an automatic injection system for foam row agent for gas recovery by foam row in a water-gas reservoir. Background technique [0002] The Sichuan-Chongqing region is one of the important natural gas producing areas in my country. However, the proportion of gas reservoirs with water is as high as about 80%. With the development, water intrusion has had a huge impact on the effective development of gas reservoirs. It will inevitably lead to water flooding of the gas well and reduce the recovery rate of the gas reservoir. [0003] At present, the main technical means for the later development of water-gas reservoirs in the Sichuan-Chongqing area is drainage and gas recovery, and a technical system represented by foam drainage, gas lift, and electric submersible pumps has been formed. Among them, bubble row [foam row refers to foam drainage] gas extraction is a method...

AI Technical Summary

Problems solved by technology

In this process, if the foam row rod or the foam row solution is too little, the water in the well with water gas reservoir will liquid seal the natural gas, which will result in less or no gas production; if the foam row rod or foam row Too much solution, too much soaking rods will cause solid blockage, too much soaking solution will cause liquid blockage, resulting in failure to produce gas

[0005] To sum up, the foam discharge agent in the prior art cannot be injected according to the requirements of the gas recovery process, that is, the input amount of the foam discharge agent is either too much or too little, and it cannot be injected into the required amount required by the gas recovery process, that is, the accuracy of the injection Low

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