Two-phase seepage test device for high-voltage electrical pulse in-situ permeability-enhancing gas-bearing reservoir

Abstract

The invention discloses a high-voltage electric pulse in-situ anti-permeability gas-bearing reservoir two-phase seepage test device, comprising a stress loading system, a high-voltage electric pulse fracturing operating system and a water-gas two-phase seepage system; the stress loading system It includes a pressure chamber, an axial pressure loading module and a confining pressure loading module; the high-voltage electric pulse fracturing operation system includes a high-voltage electric pulse generation module, a high-voltage electric pulse signal monitoring module and a protection module; the water-gas two-phase seepage flow The system includes a water-gas pressure loading module and a flow data acquisition module. By simulating the coal body test of electric pulse under different ground stress, different voltage and other conditions, and simulating the physical test of high-voltage electric pulse fracturing coal body under the action of multi-physics coupling, the in-situ permeability enhancement of high-voltage electric pulse can be carried out. Reservoir two-phase seepage test.

Description

technical field [0001] The invention relates to the field of coalbed methane (mine gas) exploitation, in particular to a high-voltage electric pulse in-situ permeability-enhancing gas-bearing reservoir two-phase seepage test device. Background technique [0002] High-voltage electric pulse rock crushing technology, as an emerging reservoir anti-permeability technology, has been widely used in the fields of oil and gas extraction, mineral processing, and coalbed methane extraction in recent decades. The fracturing effect of high-voltage electrical pulse is to use the shock wave generated in the discharge process and the mechanical effect caused by the high temperature generated in the plasma channel to break the solid. In the field of coal seam anti-reflection technology, the high-voltage electric pulse coal seam anti-reflection technology has a series of advantages compared to the previous coal seam anti-reflection technology with less energy consumption and higher efficienc...

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Problems solved by technology

[0004] Although the existing electric pulse fracturing permeability enhancement system has realized the research on the high-voltage electric pulse fracturing coal body to a certain extent, it is unable to perform in-situ permeability enhancement and seepage on the loaded specimen during the test and obtain real-time Information, the amount of information obtained during the test is small, which limits the research on the response mechanism of the coal mass during the electric pulse fracturing process, and it is difficult to simulate the in-situ stress environment of the coal mass in deep mining

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