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上、下扬子区下寒武统页岩厚度大,分布广,有机碳含量高,页岩有机质类型好,成熟度达到过成熟阶段,生气能力均较强;页岩气主要以游离态赋存于页岩溶蚀孔隙、粒内、粒间溶孔及裂缝中,以吸附态赋存于页岩泥质片间隙、干酪根表面微裂缝内表面;上、下扬子区页岩气藏被改造、破坏严重,有利的成藏区是在相对稳定的区域,同时下扬子区还应该避开火山岩覆盖区。
The Lower Cambrian shales in the upper and lower Yangtze regions are thick, widely distributed, have high organic carbon content, good shale organic matter types, mature maturity stage and strong gas generating ability. Shale gas mainly exists in the free state In shale dissolution pores, intragranular, intergranular dissolved pores and fractures, the adsorbed state occurs in the shale interbed and kerogen inner surface; the shale gas reservoirs in the upper and lower Yangtze areas have been altered and destroyed The serious and favorable reservoir areas are in a relatively stable area, and the lower Yangtze area should also avoid the volcanic rock cover area.