四川盆地及其周缘下寒武统页岩气聚集条件

在对重庆市秀山县溶溪和四川省南江县小两等15处下寒武统黑色页岩的露头观察和取样分析基础上，研究了四川盆地及其周缘下寒武统黑色页岩的沉积相、分布、有机质类型及含量、成熟度、孔隙度和含气量等页岩气聚集条件。与美国主要产气页岩相比，这些页岩具有厚度大、有机碳含量高、成熟度高和含气量高等特点，具备页岩气藏发育的良好地质条件。四川盆地及其周缘下寒武统页岩气藏最有利发育区位于川南-黔北-黔中、鄂西-渝东和川东北地区，并分析了各有利区的泥岩、页岩具体指标。根据实测含气量，采用体积法计算研究区下寒武统页岩气资源量为（3.3~11.4）×10¹² m³，中值为7.4×10¹² m³。

Accumulation conditions of the Lower Cambrian shale gas in the Sichuan Basin and its periphery

Through observations,sampling and laboratory analyses of 15 black shale outcrops in the Sichuan Basin and its periphery,we studied shale-gas accumulation conditions of the Lower Cambrian black shale,such as depositional facies,types and contents of organic matter and its maturity,distribution,porosity and gas contents of the black shale etc..Compared with major U.S.gas-producing shales,the Lower Cambrian shale in the Sichuan Basin and its periphery was characterized by great thickness,abundance of organic c...