Reservoir Characteristics of the Lower Silurian Longmaxi Shale in Zhaotong Region, Southern China

Figure 2

Shale facies of the Longmaxi Formation in the Zhaotong region: (a) carbonaceous shale; (b) siliceous shale, dark in color and hard, with a high SiO₂ content; (c) calcareous shale, contains high angle fractures that are filled with calcite; (d) silty shale, light layers contain mainly quartz and feldspar, while the dark layers contain high clay and organic matter contents; (e) gray mudstone, light gray in color; (f) muddy siltstone, displays wavy to horizontal bedding.

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