Comprehensive recycling system for high-pressure and low-pressure associated gas of gas field

Abstract

The invention discloses a comprehensive recycling system for high-pressure and low-pressure associated gas of a gas field. The system comprises a high-pressure dehydration unit, a low-pressure dehydration unit, a CNG compressor, a CNG compression gas filler, two gas generator sets and a high-pressure dehydration unit gas filler; the CNG compressor is connected between the low-pressure dehydration unit and the CNG compression gas filler; the high-pressure dehydration unit is connected with the high-pressure dehydration unit gas filler; an inlet of the high-pressure dehydration unit is connected with an emergent block valve; a pressure adjusting valve is connected between an inlet of the low-pressure dehydration unit and an inlet of the high-pressure dehydration unit; and the two gas generator sets are respectively connected between the low-pressure dehydration unit and the CNG compressor through pressure relief valves. The system not only can satisfy the filling demands in trial extracting period, but also can satisfy the filling demands in normal extraction period, and satisfies the filling demands under the condition of gas source pressure attenuation in normal extraction; and two filling system can be singly used or combined for use, so that the energy consumption is reduced, and the investment is saved.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas, in particular to a comprehensive recovery and utilization system for high and low pressure associated gas and test production gas in gas fields. Background technique [0002] In the process of oil or natural gas exploitation, there will be a lot of oil-associated gas and natural gas. During the trial production process, most of these gases are ineffectively burned, which not only wastes resources, but also produces a large amount of CO2, which intensifies the greenhouse effect. As the demand for clean energy such as CNG is increasing in daily life, and the public pays more and more attention to social and environmental protection, how to make full and effective use of this part of CNG has become the current focus. [0003] For now, an important means of recovering trial production gas or associated gas is to establish a CNG filling station. Since this part of the gas source is usually loc...

AI Technical Summary

Problems solved by technology

Most of the existing CNG filling master stations use the mode of pressure regulation and decompression + low pressure pre-dehydration + CNG compressor + CNG filling machine to fill CNG trailers. Because CNG raw material gas must first Decompression and then pressurization by CNG compressor, waste energy, and each station must build an independent filling station, large-scale investment

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