贵州地区下寒武统牛蹄塘组页岩气潜力分析

Analysis of Shale Gas Potential of Niutitang Formation of Lower Cambrian in Guizhou,China

贵州地区下寒武统牛蹄塘组黑色页岩分布区域较广,厚度大,有机碳含量高,成生于缺氧的闭塞滞留海洋环境。牛蹄塘组页岩气资源量约为1 960×108m3.虽然经历多次构造运动和热事件,导致贵州地区牛蹄塘组黑色页岩产状复杂、局部微变质,但仍应具有一定的页岩气资源潜力。在未来的页岩气勘探、开发中,应将其与常规以及致密碎屑岩、碳酸盐岩油气藏等一并考虑。

The black shale of Niutitang formation of Lower Cambrian in Guizhou province is widespread, thick, high in organic content and formed in anaerobic, euxinic and stagnant marine environment, with reserves of about 1 960× 10^8 m^3. The multi-episode tectonic movements and thermal events resulted in its complex occurrence and partial micro-metamorphism, but the black shale still has certain of shale gas po-tentials in it, deserving to make further studies. It is suggested that in the future geological exploration and development of shale gas should consider the black shale, tight elastic rocks and carbonate rocks and their reservoirs in Guizhon.