Geological conditions, reservoir evolution and favorable exploration directions of marine ultra-deep oil and gas in China

LI Jianzhong,TAO Xiaowan,BAI Bin,HUANG Shipeng,JIANG Qingchun,ZHAO Zhenyu,CHEN Yanyan,MA Debo,ZHANG Liping,LI Ningxi,SONG Wei

Fig. 7. Comparison of carbon isotopic values of Cambrian-Ordovician kerogen and Ordovician crude oil in the Central Tarim-North Tarim area. Data of the Dawangou section come from Reference [33]; N—number of samples; —C1y—Yuertus Formation; O3l—Lianglitage Formation; O2-3s—Saergan Formation; O1-2y—Yingshan Formation; O2yj—Yijianfang Formation.