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WU Jin,WANG Hongyan,SHI Zhensheng,WANG Qi,ZHAO Qun,DONG Dazhong,LI Shuxin,LIU Dexun,SUN Shasha,QIU Zhen
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Fig. 7. SEM images of the typical shale lithofacies of the Permian Shanxi Formation in the eastern margin of the Ordos Basin. (a) Interlayer fractures present in schistose kaolinite aggregates, C-L, Well Daji51, 2267.00 m; (b) bar-shaped organic matter, C-L, Well Daji51, 2272.70 m; (c) primary gas-generating pores present in the organic matter in the box of Fig. 7b; (d) interlayer fractures in the schistose kaolinite occurring alternately with dolomite, S-L, Well Daji51, 2293.60 m; (e) primary gas-generating pores present in the bar-shaped organic matter, S-L, Well Daji3-4, 2142.00 m; (f) pyrite grains encapsulated in the clumpy organic matter, which contains large amounts of liquid hydrocarbon bubble pores; (g) liquid hydrocarbon bubble pores; (h) large numbers of mineral interparticle pores, S-H, Well Daji51, 2297.30 m; (i) intercrystalline and interparticle pores present in the pyrite framboid associated with organic matter, S-H, Well Daji3-4, 2144.00 m; (j) liquid hydrocarbon bubble pores present in the clumpy organic matter, S-M, Well Daji3-4, 2146.00 m; (k) interparticle pores present in the interstitial organic matter occurring alternately with fine quartz, S-M, Well Daji51, 2296.60 m; (l) spongy pores present in the clumpy organic matter; (m) liquid hydrocarbon bubble pores present in the clumpy organic matter, M-M, Well Daji3-4, 2146.07 m; (n) dissolution pores present in the calcite, M-M, Well Daji51, 2298.23 m; (o) mineral interlayer fractures present in C-H, Well Daji3-4, 2168.00 m; (p) large numbers of mold pores produced after the detachment of the granular kaolinite, C-H, Well Daji51, 2287.00 m.
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