安徽地区古生界页岩气勘探潜力

Exploration potential of shale gas for Paleozoic in Anhui Area

李红霞 史建南 郑荣才

成都理工大学沉积地质研究院，四川 成都 610059

Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China

页岩气是一种新生接替型非常规能源，其识别与评价方法有别于常规天然气。研究区泥页岩厚度、埋深、矿物组成及有机地球化学特征等方面的综合研究表明：下寒武统泥页岩厚度大，埋藏深，脆性矿物和有机碳质量分数较高，部分地区热成熟度适中；上奥陶统和下志留统泥页岩厚度小，埋藏深，黏土矿物质量分数较高，有机碳质量分数低，部分地区热成熟度高；二叠系泥页岩厚度大，埋藏相对较浅，脆性矿物和有机碳质量分数较高，热成熟度适中。因此，认为安徽地区二叠系页岩气勘探潜力最大，下寒武统次之。

Shale gas is a new replaceable unconventional energy source, which is different from conventional gas reservoir in its recognition and evaluation. The study of shale thickness, depth, mineral composition and characteristics of organic geochemistry shows that the shale indicates great thickness, deep burial, high content of fragile mineral, high organic carbon content in Lower Cambrian, and moderate thermal maturity in partial areas. Shale is of small thickness, deep burial, high content of clay mineral and low content of organic carbon, and high thermal maturity in partial area in Upper Ordovician and Lower Silurian. Permian shale is thick, which is buried relatively shallow. Its composition of fragile mineral and organic carbon are high, meanwhile, its thermal maturity is proper. So exploration potential of Permian shale is the greatest in Anhui, and Lower Cambrian takes second place.

10.6056/dkyqt201301004