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ABSTRACT 17α(H)-diahopane are extensively distributed in Yanchang formation source rocks of Ordos Basin, but the content varies greatly. The content of 17α(H)-diahopane is pretty low in Chang 7 oil shale,… Click to show full abstract
ABSTRACT 17α(H)-diahopane are extensively distributed in Yanchang formation source rocks of Ordos Basin, but the content varies greatly. The content of 17α(H)-diahopane is pretty low in Chang 7 oil shale, whereas it is very high in Chang 9 mudstones. Low diahopane abundance of Chang 81 reservoir extracts and similar crossplots of Ts/C29Ts and C30 diahopane/C30 hopane show that Chang 81 oils come from Chang 7 oil shale. However, Chang 82 and Chang 9 reservoir extracts are similar to Chang 9 source rocks in most of geochemical parameters, which indicates that the oil is derived from Chang 9 source rocks.
Journal Title: Petroleum Science and Technology
Year Published: 2017
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