四川盆地下志留统龙马溪组页岩气成藏条件及有利地区分析

四川盆地下志留统龙马溪组发育富含有机质页岩。作为页岩气的源岩，该套页岩在盆地内分布广泛,厚度大，有机质含量高，有机质类型好，热演化程度高，生气潜力大；作为储层，页岩中孔隙和裂缝发育，为页岩气提供了充足的储集空间，并且等温吸附实验也表明，页岩具有较强的气体吸附能力；由于页岩的致密性及抗构造破坏性，本地区构造条件满足页岩气成藏要求。多口井下志留统页岩的气测显示也为页岩气的存在提供了有利证据。根据页岩厚度、有机碳含量、热演化程度和生烃强度等信息，预测宜宾-自贡-泸州一带及达州-万县一带为页岩气的有利勘探区域。

Reservoir-forming conditions and favorable exploration zones of shale gas in Lower Silurian Longmaxi Formation of Sichuan Basin

There develops shale with rich organic matters in Longmaxi Formation of the Lower Silurian in Sichuan Basin.This shale with a great thickness is the source of shale gas and widely distributed in the basin.As the source,the shale is characterized as high organic content,good organic type and high organic thermal evolution degree.As the reservoir,there exits great quantity of cracks,porous and wrinkles,which offers sufficient accumulated space for shale gas.The isothermal adsorption test shows that the shale ...