On the geobiological evaluation of hydrocarbon source rocks |
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| Authors: | Xie Shucheng Yin Hongfu Xie Xinong Qin Jianzhong Hu Chaoyong Yan Jiaxin Huang Junhua Zhou Lian Yang Xianghua Wang Yongbiao and Xu Sihuang |
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| Institution: | (1) Key Laboratory of Biogeology and Environmental Geology of Ministry of Education, China University of Geosciences, Wuhan, 430074, China;(2) State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, 430074, China;(3) Faculty of Earth Resources, China University of Geosciences, Wuhan, 430074, China;(4) Wuxi Research Institute of Petroleum Geology, RIPED, SINOPEC, Wuxi, 214151, China |
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| Abstract: | Hydrocarbon source rocks are characterized by the hydrocarbon discharge, and the alteration and variation in organic compositions
and organic content due to the enhanced thermal maturation. These variations throw constraints on the application of the conventional
inversion evaluation of hydrocarbon potential by assessing the residual organic matter left in source rocks. Geobiology, probing
the interaction between the life system and the earth system, provides new principles in deciphering the whole dynamic processes
related to the organic evolution history from living biomass to organic burial. Geobiological subdisciplines, including molecular
geobiology, geomicrobiology, geoecology and biogeochemistry, offer new methodology and techniques to estimate the paleoproductivity,
depositional organics and organic burial capacity and their components. Geobiofacies, newly proposed herein, is terminologized
to define the geobiological dynamic processes through the combination of biofacies with organic facies and sedimentary facies,
and expressed by the biohabitat types, paleoproductivity, depositional and preserved organics. Geobiofacies is identified
as a useful means to create the geobiological evaluation system, which in turn rectifies the conventional evaluation system
for the marine source rocks.
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Translated from Earth Science—Journal of China University of Geosciences, 2007, 32(6): 727–740 译自: 地球科学—中国地质大学学报] |
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| Keywords: | marine source rock geobiology evaluation system geobiofacies productivity organic burial capacity |
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