苏北盆地古近系泥页岩有机质孔发育特征及影响因素

发布时间：2018-10-24 20:23

【摘要】：通过对苏北盆地古近系泥页岩研究并结合美国Marcellus页岩研究成果,定义有机质孔的概念,归纳有机质孔的类型及特征,探讨有机质孔发育的影响因素并总结有机质孔演化规律。结果表明:有机质孔泛指在有机质内部或边界处发育并与有机质具有成因联系的所有孔隙,包括原生有机质孔和次生有机质孔两类;有机质孔形态多样,分布具有非均质性,特别当有机质孔大量发育时,其内部结构是具有层状格架的似蜂窝状连通体;温度、上覆岩层压力、无机矿物和流体是影响有机质孔发育的外部条件,有机质类型、有机质成熟度和有机质含量是控制有机质孔发育的内部因素;苏北盆地古近系泥页岩实际样品和热模拟实验样品中有机质孔均表现出阶段性演化特征,这与干酪根热解生烃过程中的组构演化和生烃机制密切相关。
[Abstract]:Based on the study of Paleogene shale in Subei Basin and the research results of Marcellus shale in the United States, the concept of organic pore is defined, the types and characteristics of organic pore are summarized, the influencing factors of organic pore development are discussed and the evolution law of organic pore is summarized. The results show that the organic pore generally refers to all the pores developed at the internal or boundary of organic matter and related to the origin of organic matter, including the primary organic pore and the secondary organic pore, and the organic matter pore is diverse in morphology and distributed in heterogeneity. Especially when the organic pore is developed in large quantities, its internal structure is a honeycomb-like connective body with layered framework, temperature, overlying rock pressure, inorganic minerals and fluids are the external conditions that influence the development of organic pore, and the type of organic matter. The organic matter maturity and organic matter content are the internal factors controlling the development of organic matter pore, and the organic matter pore in the Paleogene shale samples and thermal simulation samples in Subei Basin shows the characteristics of stage evolution. This is closely related to the fabric evolution and hydrocarbon generation mechanism during pyrolysis of kerogen.
【作者单位】：中国石油大学地球科学与技术学院;山东省油藏地质重点实验室;中石油油气储层重点实验室中国石油大学研究室;中国石化江苏油田分公司地质科学研究院;
【基金】：国家科技重大专项(2017ZX05009-001) 国家留学基金项目(201506450031)
【分类号】：P618.13

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