Experimental Study of CO2-ECBM by Injection Liquid CO2
نویسندگان
چکیده
Coal mine gas disasters have severely restricted production safety. Improving extraction efficiency can effectively reduce disasters. Scholars confirmed that CO2 successfully displaces coal seam CH4. This study conducted displacement and in situ experiments compared drainage under different injection pressures. The indicated CH4 rates increased pressures while the ratios decreased. pressure had a positive effect on sweep efficiency. experiment showed concentration trends inspection hole remained consistent. Through observing data of original holes, average during low- medium-pressure injections by 0.61 times 1.17 times, respectively. low-pressure scalar was 1.08 times. During injection, purity 1.94 diffusion ranges were 20–25 m 25–30 m, 26% better than with 2.8 MPa 1.4 MPa, respectively, for proposes an effective method improving
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ژورنال
عنوان ژورنال: Minerals
سال: 2022
ISSN: ['2075-163X']
DOI: https://doi.org/10.3390/min12030297