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
Table 2 Limit values of the three segmentation features of S1 changing with TOC variation.
Basin (sag) Formation TOC/% S1/(mg•g-1) Data source
Limit value 1 Limit value 2 Limit value 1 Limit value 2
Cangdong sag in
Bohai Bay Basin
Member 2 of Paleogene
Kongdian Formation
0.90 2.3 0.8 4.0 This study
Qikou Sag in
Bohai Bay Basin
Member 3 of Paleogene
Shahejie Formation
1.00 2.0 0.5 2.6
Gulong Sag in
Songliao Basin
Member 1 of Cretaceous Qingshankou Formation 0.80 2.5 0.8 3.8 [25]
Yitong fault depression
in Yitong Basin
Paleogene Shuangyang
Formation
0.70 2.3 0.6 3.0
Jiyang Depression in
Bohai Bay Basin
Member 3 of Paleogene
Shahejie Formation
0.75 2.4 0.5 5.3 [26]
Member 4 of Paleogene
Shahejie Formation
0.70 2.0 0.8 4.5
Ordos Basin, Member 7 of Triassic Yanchang Formation 1.00 2.5 1.0 3.0 [27]
West Gulf Basin Eagle Ford shale 2.2 3.8 [28]