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以下扬子下寒武统幕府山组泥、页岩和下二叠统栖霞组碳酸盐地层为研究对象,运用孢粉相方法,在明确有机质组成的基础上,分析了有机质的来源、类型及烃源岩形成环境。幕府山组有机质组成单一,无定形含量普遍在90%以上,低等水生生物是其主要来源,有机质类型以Ⅰ型为主,烃源岩分布较为集中,TOC高,类型好,是较深水、闭塞、准厌氧到厌氧的泻湖或海湾环境下的产物。栖霞组地层有机质组成变化较大,但仍以无定形为主,类型主要为混合型。由于沉积微环境变化频繁,水体缺氧程度极不稳定,导致栖霞组烃源岩层呈非均质分布,TOC偏低,类型相对较差。
Following the Lower Cambrian Cuofunshan mud, shale and carbonate reservoirs of the Lower Permian Qixia Formation, the source and type of organic matter were analyzed by using the sporopollenic phase method based on a clear organic matter composition Source rocks form the environment. The monsoon composition in the Shumunshan Formation is generally over 90%. The lower aquatic organisms are the main source of the organic matter. The type of organic matter is mainly type I, the source rock is more concentrated, the TOC is higher and the type is better. Occlusion, quasi anaerobic to anaerobic lagoon or gulf environment product. The composition of organic matter in Qixia Formation varies greatly, but it is still mainly amorphous, and the types are mainly mixed. Due to the frequent change of sedimentary microenvironment, the degree of anoxia in water bodies is extremely unstable, resulting in the heterogeneous distribution of source rocks in Qixia Formation, with low TOC and relatively poor types.