湖相烃源岩研究进展

THE PROGRESS ON THE STUDY OF LACUSTRINE SOURCE ROCKS

湖相烃源岩的沉积具有很强的非均质性,其中发育有机质富集层的优质烃源岩对陆相大油气田的形成具有控制作用,关于湖相烃源岩中有机质富集层的形成机制已引起人们广泛关注,对其认识已取得重要进展。湖相优质烃源的发育与湖盆演化过程中可容纳空间的变化、古湖泊的物理化学性质、古生产力营养的来源、气候的周期性变化等因素有着密切联系,对其成因机制的进一步研究应该注意寻找湖相富有机质沉积韵律中有机化合物与无机元素之间的依存关系,分析地质演变过程中周期性和事件性的耦合关系,探讨地质环境、生物演化、有机质富集层形成的内在联系。

There is distinctive heterogeneity in the deposition of lacustrine source rocks. The occurrence of high-quality lacustrine source rocks with rich-organic matter plays an important role in controlling the formation of large oil fields. It has been widely concerned about the mechanism forming rich-organic matter in lacustrine source rock and has achieved significant advance. The deposition of high-quality source rocks has close relationships with the variation of the capacities of lacustrine basins during their evolution, paleolacustrine physicochemical properties, nutrition origin of paleo-productivity, periodic variation of climate and so on. In order to study the formation mechanism of high-quality source rocks, we should try to find out the dependence relations between organic compounds and inorganic elements in sedimentary rhythms in rich organic matter strata, analyse the coupling relation between cyclicity and incident during＂ geologic succession, inquire into the inherent connection among geologic environment, biogenetic derivation and the formation of rich-organic matter strata.