Biological marks of the crude oil contain long lateral chain of tricyclic terpane, and the content of gammacerane is low.
原油志化合分布,见长侧链三环萜烷,但γ-蜡烷丰低。
The crude oils of Chang 20 belong to typical immature oil which have odd even predominance and lower ratios of sterane and terpane maturity index.
长20井的原油既有正烷烃奇偶优势,又有低甾萜烷异构体比值,属于典型的低熟原油。
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