摘要
四川古蔺县石宝矿段位于古蔺复式背斜南翼的次级褶皱—石宝向斜东段,含煤地层为二叠系龙潭组。煤层气富集特征为张性断裂发育带附近含气量低,压性断裂附近含气量明显增大;影响煤层气富集因素有构造、储层(煤层)、围岩封盖性能和水文地质条件。全区较稳定可采的主要煤层C17、C25煤层厚度均较大;煤层在纵向上分布具规律性;区内长兴组灰岩与含煤岩系水力联系小,对煤层气影响不大;茅口组灰岩岩溶发育,地下水活动强烈,对C25煤层有较大影响。
The Shibao block, Gulin Coal Field lies in the eastern sector of the Shibao syncline on the southern limb of the Gulin anticlinorium. Coal-bearing beds belong to the Permian Longtan Formation. Enrichment in coalbed gas is controlled by reservoir （coal beds）, wall rock properties and hydrogeological conditions as well as structure with compressioal faults other than extensional faults. The Maokou limestone has large influence on the coal bed 25 due to development of karst.
出处
《四川地质学报》
2013年第4期430-434,共5页
Acta Geologica Sichuan
