Molecular fossils and oil-source rock correlations in Tarim Basin, NW China

查看全文 作　　者：ZHANG [1]Shuichang;LIANG [1]Digang;LI [2]Maowen;XIAO [3]Zhongyao;HE [1]Zhonghua

机构地区：[1]Key Laboratory of Petroleum Geochemistry,Research Institute of Petroleum Exploration and Development,China National Petroleum Corporation,Beijing 100083,China;[2]Geological Survey of Canada,3303-33 st.,NW Calgary,Alberta T2L 2A7,Canada;[3]Research Institute of Petroleum Exploration and Development,Tarim Oilfield,Kuerle 841000,China

出　　处：《Chinese Science Bulletin》索引2002年第47卷第S1期,共8页

摘　　要：The distribution of 'molecular fossils' (bio-markers) of steroid compounds in extracts from some spe-cific geologic age in the Tarim Basin have been analyzed andare used as the fingerprints for the oil-source rock correla-tion. Having been affected by maturation, migration, phasefractionation and biodegradation, not any molecular fossilsrelated to source and environment can be used as the finger-prints for oil-source rock correlation. Some special bio-markers widely existed in the extracts from Cambrian andOrdovician rocks in the Tarim Basin and showed obviousdifference in each stratum, including dinosteranes (C₃₀),4-methyl-24-ethyl-cholestanes (C₃₀) and their aromatizedsteroids, C24-norcholestanes and C₂₈ steranes originated fromdinoflagellates and diatom. Few oils such as the heavy oildrilled in the Cambrian reservoir from Tadong 2 well (TD2)correlated well with the extracts from the Cambrian. Theamazing similarity of the relative contents of these com-pounds between the marine oils produced in Tazhong andTabei uplifts and the extracts from the Upper Ordoviciansuggests that the Middle-Upper Ordovician is the very likelymain source for the marine oils. 关键词：molecular FOSSILS dinosterane triaromatic dinosterane 24-norcholestane DINOFLAGELLATE CAMBRIAN Upper ORDOVICIAN TARIM Basin.

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Molecular fossils and oil-source rock correlations in Tarim Basin, NW China

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