古近系页岩油赋存特征——以济阳坳陷为例

发布时间：2018-08-23 15:49

【摘要】：通过大量岩心观察、薄片鉴定、X-衍射全岩矿物分析和扫描电镜分析,将济阳坳陷古近系泥页岩划分为10余种类型岩相。在岩相划分的基础上,分析了济阳坳陷页岩油赋存特征。富有机质纹层状泥质灰岩相/灰质泥岩相是页岩油赋存的最有利岩相;济阳坳陷的泥页岩的储集空间主要包括各类基质的孔隙和裂缝,最有利赋存空间是各类裂缝(层间缝、构造裂缝、超压裂缝);页岩油具有薄膜状游离态和浸染状吸附态两种赋存相态,在泥页岩裂缝、碳酸盐晶间孔中以游离态为主,在有机孔、黄铁矿晶间孔、黏土矿物晶间孔中以吸附态为主;通过页岩油油源对比、成熟度、地层异常压力、地层水水型等方面的证据确定济阳坳陷页岩油具有"非原位、短距离源内运聚"的特征。
[Abstract]:The Paleogene shale in Jiyang depression is divided into more than 10 types of lithofacies through a large number of core observations, thin slice identification of the whole rock mineral analysis and scanning electron microscope analysis of the Paleogene shale in Jiyang Depression. On the basis of lithofacies classification, the occurrence characteristics of shale oil in Jiyang depression are analyzed. The reservoir space of shale in Jiyang depression mainly includes the pores and fractures of all kinds of matrix, and the most favorable storage space is all kinds of fractures (interbedded fractures). Shale oil has two existing phases: thin film free state and impregnated adsorption state. In shale fracture, carbonate intergranular pore is mainly free state, organic pore, pyrite intergranular pore, and pyrite intergranular pore, the organic pore, the pyrite intergranular pore, the organic pore and the pyrite intergranular pore. The intergranular pore of clay minerals is mainly adsorbed, and through the evidence of shale oil source correlation, maturity, abnormal formation pressure and formation water type, it is confirmed that shale oil in Jiyang depression has the characteristics of "non-in-situ, short-distance source migration and accumulation".
【作者单位】：胜利油田分公司勘探开发研究院;
【基金】：国家科技重大专项(2016ZX05006)资助
【分类号】：P618.13

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