Heterogeneous geological conditions and differential enrichment of medium and high maturity continental shale oil in China

HU Suyun,BAI Bin,TAO Shizhen,BIAN Congsheng,ZHANG Tianshu,CHEN Yanyan,LIANG Xiaowei,WANG Lan,ZHU Rukai,JIA Jinhua,PAN Zhejun,LI Siyang,LIU Yuxi

Table 2. Microstructures of shale oil source rocks in different types of continental lake basins

Water in lake basin Key basin Stratum Massive source rock (TOC<2%) Laminar-like source rock (2%≤TOC<5%) Laminar source rock rich in organic matter (TOC≥5%) Freshwater- brackish water Ordos Basin Chang-7 Member Brackish water Songliao Basin Qingshankou Formation Semi-saline- brackish water Jiuquan Basin Cretaceous Xiagou Formation