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Influence of depressurization rate on gas production capacity of high-rank coal in the south of Qinshui Basin, China
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SU Xuefeng,LIU Yan,CUI Zhouqi,ZHANG Jianguo,YU Li,WANG Kai
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Table 5 Statistics on CBM well production indexes under different depressurization modes.
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Production
block | Production period | Well number | Average
gas break-
through time/d | Average production achieving time/d | Average single well gas production/(m3?d-1) | Fan
Zhuang | 2006-2011 | 753 | 103 | 360 | 1 200 | | 2016-2018 | 132 | 35 | 150 | 1 500 | Zheng
Zhuang | 2012-2013 | 840 | 133 | | 500 | | 2017-2018 | 49 | 60 | 180 | 2 600 |
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