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Experimental research on displacing coal bed methane with supercritical CO2 |
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| Authors: | Tao Yang Baisheng Nie Dong YangRuming Zhang Caihong Zhao |
| Institution: | a Faculty of Resources and Safety Engineering, China University of Mining & Technology, Beijing 100083, China b State Key Laboratory of Coal Resources and Safe Mining, Beijing 100083, China c College of Mining Technology, Taiyuan University of Technology, Taiyuan 030024, China |
| Abstract: | The high-gas and low-permeability are the common problems of China coal mine, which restrain the mining of coal-seam gas resources safely and efficiently. Hence, to solve the problem of low permeability of coal seam, an experimental system was set up and experimental research was conducted to investigate the effect of the displacement of methane by injecting supercritical CO2 into coal samples. The experimental results indicated that, the extraction effect of supercritical CO2 changes the coal’s porosity, and broadens the seepage channel for methane. Thus, the methane could be desorbed effectively from the coal matrix, and flow through more cracks at higher speed. |
| Keywords: | Supercritical CO2 Displacement Methane Experimental research |
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