Sweet spot evaluation and exploration practice of lacustrine shale oil of the second member of Kongdian Formation in Cangdong sag, Bohai Bay Basin

HAN Wenzhong,ZHAO Xianzheng,JIN Fengming,PU Xiugang,CHEN Shiyue,MU Liangang,ZHANG Wei,SHI Zhannan,WANG Hu

Fig. 6. CT scanning of pores and throats and T2 spectrum features at different rotation rates of shale samples with different structures from Well Guandong 12. (a) 3829 m, laminar felsic shale, with pores in layered distribution, an average pore radius of 187 nm, and an average throat radius of 168 nm; (b) 3829 m, laminar felsic shale, with movable fluid saturation of 46.7%; (c) 3862 m, thin-layered felsic shale, with large pores in layered distribution, micropores in 3D distribution, large throats in local parts, an average pore radius of 102 nm, and an average throat radius of 66 nm; (d) 3862 m, thin-layered felsic shale, with movable fluid saturation of 15.6%; (e) 3888 m, layered felsic shale, with micropores in 3D distribution, large throats in local parts, an average pore radius of 87 nm, and an average throat radius of 58 nm; (f) 3888 m, layered felsic shale, with a movable fluid saturation of 8.7%.