富含有机质泥页岩孔隙结构与储集空间类型分析

Analysis of the organic-rich shale pore structure of reservoir space

渤海湾盆地济阳坳陷沙三下亚段页岩油气的分布,关系着该区块油气经济效益的发展。从微观角度分析,要研究沙三下亚段的页岩油气分布,需要研究该区泥页岩的孔隙结构与储集空间类型。为了达到这样的研究目的,本文首先对济阳坳陷泥页岩的分布和研究区泥页岩的物理性质进行了调研,接着在实验室利用电子显微镜、扫描电镜将该区所采样品进行观察,最后将典型的薄片和镜下照片进行整理总结,得到认识:研究区域泥页岩孔隙结构主要为晶间孔和粒间孔,储集空间主要包括裂缝型和微孔隙型,主要表现有构造缝、成岩缝。

The distribution of shale gas in Jiyang depression of Bohai bay basin, the sediment under the three period is related to the development of the economic benefit of the oil and gas in this area. From the micro point of view, it is needed to study the pore structure and the type of reservoir space of the shale in the sediment under the three period. In order to achieve this purpose, firstly, Jiyang depression physical properties of shale distribution and shale were investigated. Then in the laboratory, samples which were observed by using electron microscope and scanning electron microscope. Finally, the typical slices under a microscope and the pictures were summarized, and come to the conclusion： the shale pore structure in study area mainly included inter-granular pores and grain hole, the reservoir spaces mainly included fracture type and micropore type, performance for structure crack and diagenetic crack.