摘要
从构造、煤层埋深和水文地质条件等3个方面探讨了淮南煤田潘谢东区块煤层气富集的地质控制规律,指出现今煤层含气量的分布规律体现出褶皱控气的特征,但不同煤层因构造煤发育程度的差异,其含气性在不同褶曲部位有所不同;煤层气含量总体上受储层压力的控制,但埋深增加和储层温度升高,吸附性降低,煤层气含量随埋深增加的下限深度因褶曲和煤层有所不同;区内断层的富水性弱,断层两侧裂隙较为发育,煤层气有所逸散,断层带煤层气含量稍低。
The control of geological conditions on the coalbed methane （CBM） accumulation in the east area of PanXie is discussed from three aspects： structure, burial depth of coal seam, and hydrogeologic condition. The following conclusions are drawn： the distribution of gas content in the present coal seam shows that the gas is controlled by folds, but gas is different in different fold positions due to different development degrees of coal; the methane content is controlled by reservoir pressure, but the lower limit depths of methane increasing with depth are different in different folds and coal beds because the reservoir temperature rises and the adsorption is reduced when bury depths increase; the fault water abundance is low in the study area, the methane content is slightly low in faults because that cracks are well-developed in the fault two flanks leading to the effusion of CBM.
出处
《天然气地球科学》
EI
CAS
CSCD
2007年第4期568-571,共4页
Natural Gas Geoscience
关键词
煤层气
控制规律
水文地质条件
潘谢东区
Coalbed methane
Control law
Hydrogeologic condition
East area of Panxie.
