Accumulation and Development of Unconventional Oil and Gas State Key Laboratory Cultivation Base Northeast Petroleum University Daqing 163318 China;
Hubei Key Laboratory of Petroleum Geochemistry and Environment Yangtze University Wuhan 430100 ChinaAccumulation and Development of Unconventional Oil and Gas State Key Laboratory Cultivation Base Northeast Petroleum University Daqing 163318 China;
Shenyang Center China Geological Survey Shenyang 110034 China;
Accumulation and Development of Unconventional Oil and Gas State Key Laboratory Cultivation Base Northeast Petroleum University Daqing 163318 China;
Accumulation and Development of Unconventional Oil and Gas State Key Laboratory Cultivation Base Northeast Petroleum University Daqing 163318 China;
Accumulation and Development of Unconventional Oil and Gas State Key Laboratory Cultivation Base Northeast Petroleum University Daqing 163318 China;
stepwise extraction; fluorescence spectroscopic techniques; shale grain; shale oil phase;