The Role of Microfabric and Laminae on Pore Structure and Gas Transport Pathways of Marine Shales from Sichuan Basin, China

Figure 4

Transmitted light thin section images of siliceous shale lithofacies (S). (a) Faint laminae of silty quartz. JYA-17, , 2594.03 m. (b) Slight laminae of silty quartz. Mixed organic matter and clays (black) distributed between the laminae. JYA-18, , permeability , 2597.3 m. (c) No obvious lamina is observed. Miniature lenticular clay flakes distributed along the lamination. JYA-22, , permeability . (d) Nonlaminated siliceous shale. Abundant radiolarians are observed. Some radiolarians are replaced by pyrite. JYA-23, 2615.29 m.

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