磁西勘查区主采煤层煤层气赋存特征  

Feature of coalbed methane occurrence for the major working seam in Cixi exploration area

作　　者：权巨涛[1] 宋志坚[1] 刘石铮 翟振荣[1] 

机构地区：[1]中国煤炭地质总局第一勘探局勘查院,河北邯郸056004 [2]冀中能源峰峰集团公司科技发展部,河北邯郸056004

出　　处：《河北工程大学学报（自然科学版）》2010年第2期63-66,共4页Journal of Hebei University of Engineering:Natural Science Edition

摘　　要：据勘探研究磁西勘查区主采煤层既是煤层气源岩，又是其储集层，煤层有机显微组分以镜质组为主，煤的变质程度为中～高变质的烟煤～无烟煤，生气量较高，为高瓦斯矿区。本区以正断层为主，断层使煤层与泥质岩层接触，具有一定的封闭性。煤层埋深较大，主采2号煤层直接顶板为泥岩、粉砂岩，岩性致密，透气性较差，有利于煤层气资源的保存，从而使煤层气含量升高。Fengfeng mining area is rich in coal resources. It is one of the important coal production areas in china. Through the study and exploration survey on the area, it shows that the major working seam is not only the gas source rock of the coalbed, but it is also the reservoir bed. The organic micropetrological unit is mainly about vitreous coal component. The grades of metamorphism of the coal are the medium - high ranks coals from bituminous coal to anthracitic coal. The gas production rate is high and the area is high gassy mineral district. There are mainly the normal faults in the entire district, but the faults make the coalbed to contact with the argillaceous rock bed, which makes the faults have bound closure conditions. The coalbed lays the deep level of Fengfeng mining area and the buried depth of the coalbed is a little deep. The lithologic character of the immediate roof of the coal seam Ⅱ is the mudstone or the siltstone, and it is the high density and its permeability for gas is a little bad, which is favour of saving for the coalbed methane resources and the gas content is much high.

关 键 词：磁西勘查区 煤层气 气源岩 储集层 

分 类 号：P618.11[天文地球—矿床学]