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Kinetics of Marine Oil Shale:A Case Study of Xiamaling Formation Oil Shale in Yanshan Region,North China

LIU Yan1,2,3,ZHONG Ning-ning1,SONG Tao1,4,TIAN Yong-jing1,5,HAN Hui1,ZHU Lei1 1.State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China 2.Working Station for Postdoctoral Scientific Research,PetroChina Dagang Oilfield,Tianjin 300280,China 3.Exploration and Development Research Institute,PetroChina Dagang Oilfield,Tianjin 300280,China 4.Tianjin City Land Resources and Housing Authority,Tianjin 300042,China 5.Exploration and Development Institute,SINOPEC EastChina Branch,Nanjing 210036,China  
Oil shale will be the important complementary and alternative energy in future.Xiamaling oil shale in Yanshan region,which is one of the oldest marine oil shale in China,has been selected to non-isothermally simulate hydrocarbons generation process using rapid heating protocol in open system.The result shows that most of the thermal pyrolysis occurred within the temperature range of 440-480 ℃.The kinetics parameters were thus calculated according to the Parallel principle in kinetics.The values of the activation energy were in the range of 170-290 kJ/mol,mean value is 240 kJ/mol,which is higher than lacustrine oil shale(Fushun oil shale and Maoming oil shale) and similar to the Lower Paleozoic marine(Ordovician Kukersite oil shale in Estonia and Ordovician marl in Pingliang,Gansu).Hydrocarbon generation was calculated with the kinetics parameters by heating method(about 2℃/d) of ICP technologies.The main generation temperature of Xiamaling oil shale,which ranges within 275-325℃,is higher than lacustrine oil shale(265-305℃) and comparable with Paleozoic marine ones.That shows the Xiamaling oil shale could have similar pyrolysis characteristics and same generation mechanism with the Lower Paleozoic marine,which might be related to simple biological species composition.
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