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Geochemical characteristics and applications of 18α(H)-neohopanes and l7α(H)-diahopanes

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Chinese Science Bulletin

Abstract

Distributions and geochemical significances of 18α(H)-neohopanes and of 17α(H)-diahopanes in oils from west Xialiaohe depression of the Bohai Bay Basin have been studied. Relative abundance of 18α(H)-neohopanes and of 17α(H)-diahopanes can be effectively used as maturity parameters, in a range of medium-high mature stage, based on consideration on sedimentary-organic facies of source rocks. With a dual geochemical significance of maturity and sedimentary-organic facies, neohopane and diahopane parameters can be well used in oil-source correlation and in petroleum population division. Formation, primary concentration and preservation of precursors of rearranged hopanes are closely related to depositional conditions such as Eh-pH and clays content. A series of probable diahopanes (series D) was detected in the oils, which exhibits a similar distribution pattern and geochemical behavior as that of 17α(H)-diahopanes (series B).

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Authors and Affiliations

  1. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, 510640, Guangzhou, China

    Chunjiang Wang, Jiamo Fu & Guoying Sheng

  2. Department of Geosciences, Petroleum University, 102200, Beijing, China

    Chunjiang Wang

  3. Institute of Petroleum Exploration and Exploitation, Liaohe Bureau of Petroleum Exploration, 240000, Panjin, China

    Qianhua Xiao, Jinyyou Li, Yali Zhang & Mingzhi Piao

Authors
  1. Chunjiang Wang
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  2. Jiamo Fu
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  3. Guoying Sheng
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  4. Qianhua Xiao
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  5. Jinyyou Li
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  6. Yali Zhang
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  7. Mingzhi Piao
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Wang, C., Fu, J., Sheng, G. et al. Geochemical characteristics and applications of 18α(H)-neohopanes and l7α(H)-diahopanes. Chin.Sci.Bull. 45, 1742–1748 (2000). https://doi.org/10.1007/BF02886257

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  • DOI: https://doi.org/10.1007/BF02886257

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