大倾角地层煤层气钻井
CBM well boring in strata at great inclination
含吸附煤层气煤
adsorbed methane-coal system
煤层气井组
coalbed methane well group
油气、煤层气还原作用
reduction by oil-gas and coalbed gas
变组分煤层气
Various component coal bed methane
various components coal bed methane