Quantitative Characterization for the Micronanopore Structures of Terrestrial Shales with Different Lithofacies Types: A Case Study of the Jurassic Lianggaoshan Formation in the Southeastern Sichuan Basin of the Yangtze Region

Figure 3

FIB-SEM images of the shales of the Lianggaoshan Formation, with pore genesis types identified: (a) Organic matter pore, 2547.26 m, lower subsection of the Liang Member II; (b) organic matter pore, 2555.56 m, lower subsection of the Liang Member II; (c) organic matter-clay mineral complex pore, 2589.61 m, upper subsection of the Liang Member I; (d) clay mineral pore 2483.01 m, upper subsection of the Liang Member II.

(a)

(b)

(c)

(d)