Self-desilting separation device for shale gas exploitation

Abstract

The invention discloses a self-desilting separation device for shale gas exploitation. The self-desilting separation device comprises a horizontal separator tank body, a gas inlet pipe, an exhaust pipe, a spiral pipe, a sand discharging pipe and a liquid discharging pipe, wherein the tank body is arranged on a first supporting frame, a pressure monitoring device and a liquid level monitoring device are arranged on the tank body, the gas inlet pipe is arranged at the top of the left end of the tank body, the exhaust pipe is arranged at the top of the right end of the tank body, the spiral pipe is arranged in the tank body through a second supporting frame and arranged in the axis direction of the tank body, the left end of the spiral pipe is close to the gas inlet pipe, the right end of the spiral pipe is close to the exhaust pipe, a plurality of through holes distributed in the spiral direction of the spiral pipe are formed in the spiral pipe, the sand discharging pipe and the liquid discharging pipe are arranged at the bottom of the tank body, and a filter screen for preventing a solid phase from entering is arranged at an inlet of the liquid discharging pipe. According to the device, gas, liquid and sand phases in shale gas can be separated, and sand body is prevented from blocking the liquid discharging pipeline.

Description

technical field [0001] The invention relates to the technical field of shale gas development, in particular to a self-sand separation device for shale gas exploitation. Background technique [0002] Shale gas refers to the unconventional natural gas deposited in organic-rich shale-based reservoir rock series, which is continuously generated biochemical origin gas, thermogenic gas or a mixture of the two, and can exist in natural fractures in a free state It exists in the surface of kerogen and clay particles in an adsorbed state, and a very small amount is stored in kerogen and asphaltene in a dissolved state. The proportion of free gas is generally 20% to 85%. [0003] As society's demand for clean energy continues to expand and natural gas prices continue to rise, people's awareness of shale gas is rapidly increasing. In particular, due to the continuous advancement of horizontal wells and fracturing technology, human exploration and development of shale gas is booming. ...

AI Technical Summary

Problems solved by technology

At present, hydraulic fracturing is generally used for shale gas exploitation. The shale gas extracted from the well site generally includes gas-liquid-sand three-phase, and the solid impurities in it cannot be effectively and completely eliminated in the desander of the existing technology center. Remove, and then make the solid impurities contained in the shale gas settle in the separator, cause the clogging of the separator drainage pipeline, and cause serious erosion to the valve, thus, it will cause a safety hazard

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