潘庄区块煤层气井产气曲线特征及采收率的研究

为了揭示潘庄区块煤层气井产气曲线特征，采用理论分析和数值模拟方法，分析了潘庄区块煤层气含气量、渗透率、储层压力等储层参数特征。总结了潘庄区块气井产气曲线特征受控于高资源丰度、高储层压力梯度及高渗透率的规律。结果表明：气井产气曲线特征表现为产气峰值出现时间早、持续时间长的特点；直井采收率可达59%，水平井采收率可达67%，明显高于储量报告申报的采收率为55%的取值。

The production curve and recovery rate of coalbed methane well in Panzhuang block

Theoretical analysis and numerical simulation method were applied to demonstrate the gas production curve characteristics in of Coalbed Methane(CBM) Well in Panzhuang block.The CBM reserves parameter such as gas content，permeability，reservoir pressure were analyzed.The gas production curve was controlled by the high abundance of resources，high reservoir pressure and high permeability are summarized.Results indicate：① the gas peak appears early，and have long duration characteristic；② gas recovery rate higher than the reserves report of Panzhuang block，recovery rate of straight well can reach 59%，and recovery rate of horizontal well can reach 67%.Significantly higher than recovery rate of 55% in PanZhuang block reserves report.