Hydrocarbon generation and storage mechanisms of deep-water shelf shales of Ordovician Wufeng Formation-Silurian Longmaxi Formation in Sichuan Basin, China

GUO Xusheng,LI Yuping,BORJIGEN Tenger,WANG Qiang,YUAN Tao,SHEN Baojian,MA Zhongliang,WEI Fubin

Fig. 9. Scanning electron micrograph of argon ion polished shale samples. (a) Well DY5, 3 812.34 m, organic pores and intergranular pores, weak compaction, siliceous shale, deep-water shelf facies; (b) Well JY2, 2 526.41 m, strong compaction, clay shale, shallow-water shelf facies; (c) Well JY7, 3 419.43 m, intergranular pores in clay minerals, and organic pores in circular and oval shapes; (d) Well JY7, 3 419.43 m, intergranular pores in clay minerals, and organic pores in circular and oval shapes; (e) Baltic Sea, siliceous shale (radiolarians); (f) Sichuan Basin, siliceous shale (radiolarian).