Novel separation measurement sled pollution discharge system and method for shale gas field

Abstract

The invention discloses a novel separation measurement sled pollution discharge system and method for a shale gas field. The novel separation measurement sled pollution discharge system comprises a shale gas separator, a liquid collecting pack, a sewage pool, and a centrifugal pump, wherein the liquid collecting pack is a sealed container; liquid level meters are arranged on the shale gas separator and the liquid collecting pack; a sand blocking plate is arranged in the sewage pool, and is used for dividing the sewage pool into a sand settling zone and a contaminated zone; a liquid dischargingopening is formed in the bottom of the shale gas separator; a liquid inlet I is formed in the top of the liquid collecting pack; a liquid discharging opening of the shale gas separator is connected with a liquid inlet I of the liquid collecting pack through a vertical pipeline I; a valve A is arranged on the pipeline I; a liquid outlet is formed in the bottom of the liquid collecting pack, and isconnected with the sand settling zone through a pipeline II; a valve B and a valve D are arranged on the pipeline II; the contaminated zone is connected with an entrance of the centrifugal pump through a pipeline III; an exit of the centrifugal pump is connected with a liquid inlet II of the liquid collecting pack through a pipeline IV; and a valve C is arranged on the pipeline IV. Through the adoption of the novel separation measurement sled pollution discharge system disclosed by the invention, the erosion rate of the pollution discharge pipeline can be reduced, and the operation safety ofthe equipment is guaranteed.

Description

technical field [0001] The invention relates to the technical field of shale gas exploitation, in particular to a novel separation and metering skid sewage discharge system and method for shale gas fields. Background technique [0002] The shale gas collection system used in shale gas exploitation is as follows: figure 1 As shown, the early production process of shale gas production is mainly that the gas containing impurities passes from the wellhead gas production tree through the gas production pipeline to the high-pressure sand removal skid for preliminary sand removal, and then the shale gas enters the separator for gas-liquid separation and further removal. sand. Due to the limited pore size of the filter cartridge of the desander and the structure of the desander, the actual sand removal efficiency of the desander is limited, and the liquid shale gas after passing through the desander will still carry about 10% of sand particles. The separator performs gas-liquid se...

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Problems solved by technology

In the sewage discharge process, there is a problem of severe erosion of the sewage pipeline due to the high production pressure of shale gas in each production period. The sewage pipeline will be perforated due to the excessive erosion rate, resulting in the failure of the sewage pipeline structure and endangering the shale gas. Normal safe production and operation

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