School of Geosciences;
Chinese University of Petroleum;
Beijing 102249;
China;
State Key Laboratory of Petroleum Resource and Prospecting;
Chinese University of Petroleum;
Beijing 102249;
China;
Research Institute of Zhanjiang Branch of CNOOC Ltd.Zhanjiang;
Guangdong 524057;
China;
Exploration&Development Research Institute;
Petro China Huabei Oilfield Company;
Renqiu;
Hebei 062552;
China;
crude oil family; oil shale; shale; petroleum migration; Weixinan Sag; Beibu Gulf Basin;