Shale gas sand removing separation system and method

Abstract

The invention discloses a shale gas sand removing separation system and method. The shale gas sand removing separation system includes a sand removing filtering unit and a separation measuring unit, wherein sand removing filtering unit mainly includes a sand removing diameter expanding pipe section, a sand removing branch pipe, an inlet and outlet turn-off valve, a conical filtering element and differential pressure alarm, and gas liquid separation measuring after sand removing is realized; and the separation measuring unit mainly includes a separator, a virgin gas inlet turn-off valve, a gasphase outlet turn-off valve, a gas phase flowmeter, a blow-off pipeline, a sand removing branch pipe, a liquid phase outlet emergency turn-off valve, a liquid phase flowmeter, a liquid phase adjustingvalve and a front and back turn-off valve of the liquid phase adjusting valve, and requirements of gas liquid separation measuring and further sand removing are met. According to the shale gas sand removing separation system and method, the two units are combined for using, three-level sand removing processes such as sand settlement, filtering and separation are actually carried out, and the effect and efficiency of sand removing are greatly improved while sand removing equipment is simplified; and a visual pipe is arranged to effectively monitor the effect of sand removing in the settlementsection better, meanwhile, separating is carried out in the normal process of sand discharging so as to realize non-stop sand discharging, and operation is optimized and simplified.

Description

technical field [0001] The invention relates to a system and method for sand removal and separation at a shale gas wellhead. Background technique [0002] As a huge potential unconventional natural gas resource, shale gas plays an important role in the global energy structure. my country is rich in shale gas resources, and ground engineering development attempts of shale gas fields have been started. The ground gathering and transportation technology is also in the exploratory stage, and further optimization is needed to realize large-scale and low-cost development. In the current shale gas surface engineering, the wellhead gathering and transportation process mainly includes sand removal and separation metering. [0003] Shale gas needs sand removal because shale gas development requires sand fracturing to increase production, resulting in a large amount of reverse sand discharge, solid phase impurities will corrode pipelines, equipment, instruments, and block valves and p...

AI Technical Summary

Problems solved by technology

The current design can meet the requirements, but the operation reliability is poor, and it is easy to carry impurities due to poor sand removal effect in the upstream, and then block the liquid pipeline, requiring shutdown for maintenance or setting up a bypass / standby separator

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