Abstract: Shale gas was first discovered in southeast Chongqing, where is also the key place for shale gas exploration. Formation of shale gas reservoir is controlled by shale thickness, organic matters concentration, thermal evolution, porosity and preservation. Southeast Chongqing hosts two major shale units of rich organic matters, Niutitang formation of lower Cambrian and Wufeng-Longmaxi formation of upper Ordovician-lower Silurian, both bearing thick sediments, high organic matters concentration, high thermal evolution, especially in Wufeng-Longmaxi formation with favorable geology for potential economic shale gas, also in upper Proterozoic Doushantou formation, Permian Changxing formation, Longtan formatin (Wujiaping formation), and lower Silurian Shiniulan formation (Songkan formation), where shall be a good exploration target of shale gas.  

Key words: southeast Chongqing, Niutitang formation, Wufeng-Longmaxi formation, shale gas, exploration outlook 

摘要： 渝东南是我国首先发现页岩气的地区，也是页岩气勘探开发的重点领域。页岩气藏的形成受页岩厚度、有机质丰度、热演化程度、孔隙发育程度及地层破坏情况影响，渝东南地区主要存在下寒武统的牛蹄塘组和上奥陶—下志留统的五峰—龙马溪组两套富有机质页岩，它们均具有沉积厚度大、有机质丰度高、热演化程度高等特点，尤其是五峰—龙马溪组页岩气的热成熟度等地质条件优越，具备商业性页岩气田形成和发育的地质条件。同时，该地区上元古界陡山沱组、二叠系长兴组、龙潭组（吴家坪组）及下志留统石牛栏组（松坎组）等地层中具有页岩气资源潜力条件，开展该地区页岩气深化研究，进一步扩大页岩气储量发现，是渝东南地区另一个重点工作方向。 

关键词: 渝东南；牛蹄塘组；五峰&mdash, 龙马溪组；页岩气；勘探方向