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    Volume 30 Issue 3
    May  2005
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    Article Navigation >  Earth Science  > 2005  >  30(3): 337-342
    CHEN Xiang, ZHANG Yu-min, CHENG Ke-ming, CHEN Xue-hong, 2005. Maceral Composition and Oil Potential of the Jurassic Coal-Bearing Series in the Yanqi Basin. Earth Science, 30(3): 337-342.
    Citation: CHEN Xiang, ZHANG Yu-min, CHENG Ke-ming, CHEN Xue-hong, 2005. Maceral Composition and Oil Potential of the Jurassic Coal-Bearing Series in the Yanqi Basin. Earth Science, 30(3): 337-342.
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    Maceral Composition and Oil Potential of the Jurassic Coal-Bearing Series in the Yanqi Basin

    • 1.

      Faculty of Natural Resource and Information Technology, China University of Petroleum, Beijing 102200, China

    • 2.

      Henan Oil Corporation, Nanyang 473132, China

    • 3.

      Institute of Petroleum Exploration and Development, Beijing 100083, China

    • Received Date: 2005-01-17
    • Publish Date: 2005-05-25
      Abstract
    • The Yanqi basin is a coal-bearing petroleum basin in northwest China. The most important potential source rock interval in this basin is the Jurassic coal-bearing series. Organic petrological analysis, Eval-Rock pyrolysis and 13C NMR analysis have been carried out on shale, carbonaceous shale and coal samples. Shales, carbonaceous shales and coals from the Jurassic coal-bearing series have different organic petrological and organic geochemical characteristics. There are three coal types with different maceral associations, each type having different oil/gas potential. Desmocollinite, cutinite and sporinite are the major oil-generating macerals in the coals. The Jurassic shales, carbonaceous shales and coals have different biomark- er compositions. Detailed analysis of biomarker association and oil-source rock correlation suggest that the oil found in this basin is a mixture of oil generated from Jurassic shales, carbonaceous shales and coals. This study confirms that coal-bearing series are not only important gas source rocks, but also can become effective oil source rocks.

       

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