Pore Structures of the Lower Permian Taiyuan Shale and Limestone in the Ordos Basin and the Significance to Unconventional Natural Gas Generation and Storage

Figure 8

Field emission scanning electron microscope (FE-SEM) images of shale samples. (a, b) Sample 2165.67, , organic matter-hosted pores are developed in small part of organic matter; (c) sample 2166.73, , organic matter-hosted pores are undeveloped, and organic matter shrinkage fractures can be found locally; (d, e) sample 2167.09, , organic matter-hosted pores are rich (d) and undeveloped in different organic matter (e); (f) sample 2167.69, ; (g) sample 2168.13, ; (h) sample 2181.46, ; (i) sample 2193.56, . (f)–(i) show various kinds of inorganic pores, including clay mineral interlayer fractures (f–h) and pyrite intergranular pores (i).

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