Medium and low pressure gas-liquid separation device and method suitable for multiple working conditions

Abstract

The invention provides a medium and low pressure gas-liquid separation device and method suitable for multiple working conditions. The medium and low pressure gas-liquid separation device comprises aplurality of gas well inlet pipelines, a first low pressure manifold, a first medium pressure manifold, a second low pressure manifold, a second medium pressure manifold, a compressor, an external conveying pipeline and a plurality of gas-liquid separators arranged in parallel. The upstream of the parallel gas-liquid separators is connected with the first low pressure manifold and the first mediumpressure manifold, the downstream of the parallel gas-liquid separators is connected with the second low pressure manifold and the second medium pressure manifold correspondingly, the second low pressure manifold is connected with the external conveying pipeline through the compressor, and the downstream of the second medium pressure manifold is connected with the external conveying pipeline. First process switching valves and second process switching valves are separately arranged between each gas well inlet pipeline and the first low pressure manifold and the first medium pressure manifold.When the device runs under low pressure conditions, natural gas passing through the low pressure manifold is measured by a low pressure flowmeter and supercharged by the compressor, and then is transmitted to the external conveying pipeline to realize low pressure natural gas supercharging and external transportation, and the oil recovery of gas fields is improved.

Description

technical field [0001] The present invention relates to a multi-working-condition medium-low pressure gas-liquid separation device and method, in particular to a multi-working-condition medium-low pressure gas-liquid separation device that meets the gas-liquid separation requirements of gas-gathering stations in the process of natural gas exploitation in the oil and gas industry . Background technique [0002] In the development of natural gas fields, due to the different production capacity and production time of gas wells, the pressure and output entering the gas gathering station are also different. Boost mining to meet the needs of downstream users. Therefore, according to whether the pressure of the gas well entering the gas gathering station meets the needs of downstream users, the gas field is generally divided into the following three development periods: (1) In the early stage of development, the pressure of the gas well entering the gas gathering station is greate...

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Problems solved by technology

Due to the different requirements for gas-liquid separation in different development periods, conventionally designed gas-liquid separation devices cannot meet the requirements of the above-mentioned production period

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