CO2 geological sequestration and enhancement gas extraction induced outburst risk testing method

Abstract

The invention provides a CO2 geological sequestration and enhancement gas extraction induced outburst risk testing method. The CO2 geological sequestration and enhancement gas extraction induced outburst risk testing method is suitable for simulating CO2 geological sequestration and enhancement gas extraction induced outburst risk testing, and comprises the stages of the previous preparation stage, the gas outburst inoculation stage, the gas outburst stage before coal seam CO2 injection for gas displacement, the stage of coal seam CO2 injection for gas displacement, the CO2 outburst testing stage after compressed coal seam CO2 injection for gas displacement, and evaluation for the measure of preventing outburst through coal seam CO2 injection for gas displacement. The CO2 geological sequestration and enhancement gas extraction induced outburst risk testing method is simple in step, good in detecting property, and capable of simulating the outburst coal seam CO2 geological sequestration and enhancement gas extraction process under the large-scale condition; gas outburst simulation experiments under the different conditions and CO2 outburst simulation experiments after CO2 injection can be developed; and the coal seam CO2 outburst strength under the different CO2 geological sequestration conditions and the original coal seam gas outburst strength are compared, thus the outburst risk after coal seam CO2 sequestration can be effectively tested and evaluated, the CO2 sequestration conditions are further optimized, and important guiding significance for coordinating on-site coal mine outburst prevention and treatment and CO2 geological sequestration is achieved.

Description

technical field [0001] The present invention relates to a CO 2 Geological storage enhanced gas drainage induced outburst risk test method, especially suitable for CO2 used in underground detection of coal mines 2 Geological storage enhanced gas drainage induced outburst risk testing method. Background technique [0002] Coal and gas outburst (referred to as gas outburst) is a violent dynamic process in which gas-bearing coal rocks in coal mines move rapidly (completed within seconds to minutes) from the coal stratum to the mining space in a pulverized form, accompanied by a large amount of gas ejection. Serious threat to mine safety production. Because it is too dangerous to carry out all-round real-time tracking research on the coal and gas outburst process on site, most researchers explore the mechanism of coal and gas outburst by developing corresponding test devices and relying on laboratory simulation methods. [0003] Injecting CO into outburst coal seams 2 It can ...

AI Technical Summary

Problems solved by technology

It is worth noting that CO 2 It is also a gas that can induce outburst, when CO in the coal seam 2 When the storage capacity reaches a certain level, it is very easy to cause coal and carbon dioxide outburst (referred to as carbon dioxide outburst). If CO2 is injected into the outburst coal seam 2 Avoiding gas outburst while inducing carbon dioxide outburst is not worth the loss. However, less attention has been paid to carbon dioxide outburst at present

Images