沁水盆地海陆交互相页岩气成藏条件分析

沁水盆地是华北克拉通内的海陆交互相盆地，是我国煤层气勘探开发程度最高的盆地。文章对沁水盆地的总有机碳含量、有机质成熟度、矿物组成、裂缝、孔隙度和渗透率、含气量等表征页岩气富集程度的最基本参数进行分析，认为沁水盆地海陆交互相泥页岩虽研究区单层厚度不大，但有机质丰度高，热演化程度适中，多数处于生气高峰，其他方面均满足成藏条件，尤其是脆性矿物含量高，容易在外力作用下形成天然裂缝和诱导裂缝，有利于日后开发自然产能的提高。因此发展页岩气与煤层气联合开采具有十分现实的意义。由此，对沁水盆地页岩气资源前景进行了初步展望。

SHALE GAS RESERVOIR FORMING CONDITIONS IN QINSHUI BASIN’S MARINE-CONTINENTAL FACIES

Qinshui basin hosts marine-continental facies in the North China Craton, ranks top in coal-bed methane exploration and development in China. This paper, based on its total content of organic carbon (TOC), orgianic maturity, minerals, fissures, porosity, permeability and gas content, concludes that Qinshui basin, although thin in single shale-mud bed of marine-continental facies, hosts a good gas reservoir-forming condition from its high organic maturity at gas generation bloom, especially high content of brittle minerals which can easily form natural fissures and inducing cracks by external forces, favorable for latter extracting. It’s practical to extract shale gas and coal-bed methane together. This paper gives an outlook for Qinshui basin’s shale gas resources.