Producing Efficiency of Coalbed Methane Well in Zhengming Minefield
Zuoquan Zhengming minefield is a gas-rich mine,which seriously restricts the safe and efficient mining of the coal mine.Based on the analysis of coalbed methane geological conditions in Zhengming minefield,this paper compared the production effects of four drainage methods of 28 surface pre-pumping wells that have been put into operation,and drawed the following conclusions:7-10#coal seam in Zhengming minefield is suitable for co-drainage.15#coal seam is suitable for single-layer drainage.The direct roof of 15#coal seam is sandstone,which cause the loose of coalbed gas,forming a low-gas coal seam.As the result,the gas producing efficiency of 15#coal seam is not as good as that of 7-10#coal seam.The limestone in Zhengming minefield is not suitable to participate in the co-drainage of coal seams.
NETL
NSTL
万方数据
维普
