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Development and exploration practice of the concept of hydrocarbon accumulation in rifted-basin troughs: A case study of Paleogene Kongdian Formation in Cangdong sag, Bohai Bay Basin
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Xianzheng ZHAO,Lihong ZHOU,Xiugang PU,Fengming JIN,Wenya JIANG,Dunqing XIAO,Wenzhong HAN,Zhannan SHI
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Table 1 Organic matter abundance of Ek2 source rocks in the Cangdong sag.
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| Lithology | TOC/% | (S1+S2)/(mg?g-1) | Bitumen “A”/% | Total hydrocarbon/10-6 | Comprehensive evaluation | Blocky dark
mudstone | 0.14-8.41
3.07(195) | 0.03-69.91
19.46(135) | 0.003-1.410
0.350(93) | 14.23-10 332.44
2 106.44(89) | High quality source rock | | Oil shale | 2.32-9.23
4.87(28) | 1.23-77.55
36.59(27) | 0.05-2.79
0.63(14) | 396.36-14 278.81
3 448.43(13) | High quality source rock |
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