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世界许多地方都发现了未成熟油 ,然而 ,其形成机理尚未完全搞清。目前有 5种以上的观点解释未成熟油的成因。事实上 ,大部分未成熟油有着相似的特征 ,所以它们很可能主要是由相似的方式形成的 ,文中报道了利用江汉盆地 (源岩 )钙质泥岩、绿河页岩、抚顺油页岩和南宁褐煤样品 (采自岩心或矿场 )所做模拟实验的结果。在较低温度条件下 ,由这些样品分离出的干酪根形成的饱和烃与成熟油相似 ,而全样 (包括干酪根和可溶有机质 )形成的饱和烃与未成熟油非常相似。这就证明了未成熟油可能主要是由沉积物中原生可溶有机质直接转化而成的。
Immature oil has been found in many parts of the world, however, its formation mechanism is not fully understood. At present there are more than 5 kinds of views to explain the causes of immature oil. In fact, most of the immature oils have similar characteristics, so they are likely to be formed mainly in a similar way. It is reported that the use of calcareous mudstone of Jianghan Basin (source rock), Green River shale, Fushun oil shale and Nanning lignite samples (taken from the core or mine) to do the simulation results. The saturated hydrocarbons formed by the kerogen separated from these samples are similar to the mature oils at lower temperatures, whereas the saturated hydrocarbons formed by the whole sample (including kerogen and soluble organic matter) are very similar to the immature oil. This proves that immature oil may be mainly directly converted from primary soluble organic matter in sediments.