A drainage gas production system and method for prolonging the life of gas wells in gas fields

Abstract

The invention provides a drainage gas production system for prolonging the life of gas wells in a gas field. The system includes a plurality of gas-liquid separators, which are respectively in one-to-one correspondence with a plurality of gas wells to be separated from gas and liquid; a plurality of gas output pipes, each One end of the gas output pipe is located in each gas well, and the other end is connected with the air inlet of each gas-liquid separator; a plurality of gas input pipes, one end of each gas input pipe is connected with the gas outlet of each gas-liquid separator, and the other end is located in the next gas well; The external transmission pipeline is connected with the gas input pipe at the end for outputting the gas to the outside. The external pipeline is also provided with a flow valve; the air compressor, whose intake end passes through the first circulation pipe and the gas at the most terminal The input pipe is connected, and the gas outlet is connected to each gas input pipe through the second circulation pipe; the first circulation pipe and the second circulation pipe are both provided with a first valve; the invention also provides a drainage gas recovery method, and the process of the invention is simple , low cost, convenient operation, strong practicability, and can improve the ultimate recovery of gas fields.

Description

technical field [0001] The invention relates to the technical field of low-yield gas well development, in particular to a drainage gas production system and method for prolonging the life span of gas wells in gas fields. Background technique [0002] In the process of natural gas extraction, with the prolongation of the production time of gas wells, the production of single wells decreases gradually, the liquid carrying capacity gradually deteriorates, and the liquid accumulation in the wellbore becomes more and more serious, which seriously affects the productivity of gas wells. Due to the presence of fluid accumulation in the wellbore of gas wells, the pressure of abandoned formations increases, which in turn affects the ultimate recovery of gas fields. Research and innovation of gas field drainage and gas recovery technology, completely eliminate wellbore fluid accumulation, increase single well production, achieve long-term stable production of gas fields, improve ultima...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in order to increase the output of a single well of a low-yield gas well, the production stimulation methods commonly used are: compressor gas lift, nitrogen gas lift, plunger gas lift, foam drainage and other drainage gas recovery process measures, although the above existing The measures in the technology can solve this kind of single well problem, but they also have the problems of high operating cost, heavy workload, short timeliness, and poor drainage and gas recovery in low-yield wells

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