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Evaluation of hydrocarbon generation of the Xiamaling Formation shale in Zhangjiakou and its significance to the petroleum geology in North China

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Science China Earth Sciences 2013年第9期56卷 444-452页

作者： XIE LiuJuan SUN YongGe YANG ZhongWei CHEN JianPing JIANG AiZhu ZHANG YongDong DENG ChunPing Department of Earth Sciences Zhejiang University State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of Sciences Graduate School of Chinese Academy of Sciences Research Institute of Petroleum Exploration and Development China National Petroleum Corporation

The semi-closed pyrolysis simulation system under constant pressure was conducted to explore the characteristics and mechanisms of hydrocarbon generation from Xiamaling Formation shale in Xiahuayuan,North *** experiment results indicate the oil generated by the Xiamaling Formation shale in oil window should be classified as "aromatic-intermediate" type,whereas the decreasing of dry coefficient can be ascribed to the cracking of residual bitumen in source rock in the stage of high to post *** amount of hydrocarbon gas generated from residual bitumen can be up to 1-2 m3 per ton rock in high to post mature stage by calculating hydrogen contents in the kerogen,the expelled hydrocarbon,and the residual *** reveals the importance of residual bitumen as a gas source during high to post mature stage of the kerogen evolution,and also as the broad exploration prospect of these *** research highlights the attention should be paid to oil/gas reservoirs sourced from residual bitumen of organic-rich source rock in high mature stage,even the primary oil/gas reservoirs considered as the main exploration targets in middle-upper Proterozoic sediments of North China.

关键词： residual bitumen pyrolysis experiment Xiamaling Formation shale middle Proterozoic North China

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The upper limit of maturity of natural gas generation and its implication for the Yacheng formation in the Qiongdongnan Basin,China

The upper limit of maturity of natural gas generation and it...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Long Su Jianjing Zheng Guojun Chen Gongcheng Zhang Jianming Guo Yongchang Xu Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of Sciences Graduate University of the Chinese Academy of Sciences Research Institute of China National Offshore Oil Corporation

Vitrinite reflectance(VR,Ro%) measurements from residual kerogen of pyrolysis experiments were performed on immature Maoming Oil Shale substituted the samples for the gas-prone source rocks of Yacheng formation of the Qiongdongnan Basin in the South China *** work was focused on determination an upper limit of maturity for gas generation(ULMGG) or "the deadline of natural gas generation". Ro values at given temperatures increase with increasing temperature and prolonged heating time,but ARo-value,given a definition of the difference of all values for VR related to higher temperature and adjacent lower temperature in open-system non-isothermal experiment at the heating rate of 20℃/ min,is better than *** representative examples are presented in this *** indicates that the range of natural gas generation for Ro in the main gas generation period is from 0.96%to 2.74%,in which ARo is in concordance with the stage for the onset and end of the main gas generation period corresponding to 0.02%up to 0.30%and from 0.30%up to 0.80%,*** the main gas generation period of 0.96-2.74%,the evolution of VR approach to the ULMGG of the whole rock for type II *** is equal to 4.38%of VR,where the gas generation rates change little with the increase of maturation,ARo is the maximum of 0.83%corresponding to VR of 4.38%Ro,and the source rock does not nearly occur in the end process of hydrocarbon gas generation while Ro is over 4.38%.It shows that it is the same the ULMGG from the whole rock for typeⅡkerogen as the method with both comparison and *** comparing to both the conclusions of pyrolysis experiments and the data of VR from the source rock of Yacheng formation on a series of selected eight wells in the shallow-water continental shelf area,it indicate that the most hydrocarbon source rock is still far from reaching ULMGG from the whole rock for typeⅡkerogen. The source rock of Yacheng formation in the local areas of the deepwater continenta

关键词： Hydrocarbon source rock Yacheng Formation pyrolysis experiment Upper limit of maturity for natural gas generation Qiongdongnan Basin

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