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
具有正烷烃奇偶优势，又具有较低甾萜烷异构体
值，属于典型的低熟。
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井的具有正烷烃奇偶优势，又具有较低甾萜烷异构体值，属于典型的低熟。
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