State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation;
Chengdu University of Technology;
Chengdu;
Sichuan 610059;
Geological Research Institute ofShengli Oilfield Co. Ltd.;
Dongying;
Shandong 257015;
Guangzhou Institute of Geochemistry;
Chinese Academy of Sciences;
Guangzhou;
Guangdong 510640;