Volume 39 Issue 1
Jan.  2020
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Ye Jiaren, Zhao Niubin, Yang Baolin, Xu Jianyong. Productivity and development model of source rock of the Liushagang Formation in the Weixinan Sag[J]. Bulletin of Geological Science and Technology, 2020, 39(1): 105-113. doi: 10.19509/j.cnki.dzkq.2020.0112
Citation: Ye Jiaren, Zhao Niubin, Yang Baolin, Xu Jianyong. Productivity and development model of source rock of the Liushagang Formation in the Weixinan Sag[J]. Bulletin of Geological Science and Technology, 2020, 39(1): 105-113. doi: 10.19509/j.cnki.dzkq.2020.0112

Productivity and development model of source rock of the Liushagang Formation in the Weixinan Sag

doi: 10.19509/j.cnki.dzkq.2020.0112
  • Received Date: 14 Nov 2019
  • The Weixinan Sag is a proven hydrocarbon-rich sag with the Eocene Liushagang Formation as main source rock system in the Beibuwan Basin, offshore China.In order to deepen the understanding of the productivity and development characteristics of the Liushagang Formation source rock, the paleo-productivity, organic matter burial efficiency and organic carbon burial productivity of each sub-sag in the Weixinan Sag and each member in the Liushagang Formation are restored forward by using the methods of organic geochemistry combined with geobiology and qualitative analysis combined with quantitative calculation, and the geobiological development models of the Liushagang Formation source rock are further established.The results show that there are differences in paleo-productivity, organic matter burial efficiency and organic carbon burial productivity among different sub-sags in lateral and vertical directions.The B sub-sag is the best in plane and the E2L2 is the highest in vertical sequence.Three representative geobiological development models of the Liushagang Formation source rocks can be summarized as the hypertrophic lake with high burial efficiency and burial productivity, the eutrophic lake with medium burial efficiency and burial productivity, and the eutrophic lake with low burial efficiency and burial productivity.

     

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