龙湾井田3号煤层煤层气赋存的地质控制因素

Geological Control Factors of Coalbed Methane Occurrence in No. 3 Coal Seam of Longwan Coal Filed

从构造、煤层围岩特征、煤层埋深和水文地质条件4个方面,探讨了龙湾井田3号煤层煤层气赋存的地质控制规律。结果表明:煤层气含气量在不同褶曲部位有所差异,沿向斜轴部往深部方向延伸,煤层气含量明显增高;煤层埋深对煤层气含量的控制作用明显,围岩特征影响相对较弱;地下水条件对煤层气赋存也具有一定的控制作用。

The geological control law for coalbed methane occurrence in No.3 coal seam of Longwan Coal Field was discussed from four as- pects：structure, characteristics of surrounding rock, depth of coal seam and hydrogeology condition.The results showed that coalbed meth- ane content was different in the different fold positions, coalbed methane content would increase significantly when depth along syncline ax- is.The depth of coal seam had significant control effect to combed methane content, characteristics of surrounding rock had less influence. The hydrogeology condition had certain control effect to coalbed methane occurrence.