Experimental device for combined mining of coal bed gas of multiple coal beds

Abstract

The invention provides an experimental device for combined mining of coal bed gas of multiple coal beds. The experimental device comprises specimen rubber cylinder sealing assemblies (10), an axial pressure loading system (20), a confining pressure loading system (30), a pore pressure system (40) and a mining system (50), and the two adjacent specimen rubber cylinder sealing assemblies communicate with each other. According to the experimental device for combined mining of the coal bed gas of the multiple coal beds, real simulation of the gas migration process in the combined mining process of the coal bed gas of the multiple coal beds is conducted, so that the flow condition of gas in and between the multiple coal beds under different physical properties of coal and rock, different inlet pressures and different outlet pressures is monitored.

Description

technical field [0001] The invention relates to the field of coalbed methane mining experimental equipment, in particular to a multi-coal seam coalbed methane co-production experimental device. Background technique [0002] my country's coalbed methane industry has entered the stage of commercial production, but it is limited to the Qinshui Basin and the Ordos Basin. It will be expanded to the late Permian in Southwest my country and the Late Jurassic in Xinjiang in due course, and the rich coalbed methane resources in these areas will be effectively developed. The eastern Yunnan-western Guizhou region is one of the regions with the most abundant coal resources in southern my country. A large number of previous studies have shown that through geological exploration of coal fields, the proven and predicted reserves of coal resources in major coal-bearing synclines are as high as 1918.7×10 8 t, the rank of coal is gas coal and anthracite, the gas content of the coal seam is hi...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing experimental device cannot accurately characterize the fluid migration between multiple oil and gas layers, the present invention provides a multi-coal seam coalbed methane co-production experimental device, the multi-coal seam coalbed methane co-production experimental device can Simulate the migration process of gas in multi-coal seams in the process of multi-coal bed methane co-production, so as to monitor the flow of gas in and between multi-coal seams under different coal physical properties, different inlet pressures, and different outlet pressures

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