煤系低熟油形成机制及其意义

从煤系有机质组成的复杂性和“显微组分分期生油”的角度,讨论了煤系中低熟油生成的可能性,结合实例阐述了树脂体早期生烃和木栓质体早期生烃两种煤系低熟油形成机制根据对煤的物理性质与煤层排液过程关系的分析指出,低熟油生成时期恰好是煤层释放液态烃类的最佳时期。因此,煤系存在低熟油形成机制是煤成油有效聚集的先决条件之一。

The Mechanisms of Immature Oil Generation in Coal-bearing Sequences and its Significances

In view of the complexity of the organic matter in coal-bearing sequences and "macerals oil generation by stage ",the capabilities of immature oil generation in coal-bearing sequences are discussed.With the cases studies the earlier hydrocarbon generations of resinite and suberinite,two sort of mechanisms of immature oil generation in coal-bearing sequences are expounded.Based on the relationship between the liquids exclusion and physical properties of coal,it is concluded that the stage of immature oil generation well matches with the period of the optimal release of liquid hydrocarbons in coal seams.Therefore,the generation mechanisms of immature oil in the coal-bearing sequences would be one of the preconditions for efficient accumulation of coalgenerated oil.