中文摘要：

渤海湾盆地东营凹陷始新统—渐新统沙河街组第三段下亚段（E2－3 s^3－x ）和沙河街组第四段上亚段（E2－3 s^4－s ）泥页岩分布面积广、累计厚度大、有机质丰度高、有机质类型以I型干酪根为主，具有良好的页岩油勘探潜力。泥页岩主要发育层状和纹层状构造，主要矿物组成为粘土矿物、碳酸盐矿物、石英和长石。宏观观察下，泥页岩发育的裂缝主要有成岩裂缝和构造裂缝，孔隙主要为溶蚀孔、结晶孔及生物孔隙。微观观察下，主要发育的孔隙有粒间孔、粒内孔、晶间孔和溶蚀孔等，在不同的有机质丰度、类型及热演化程度下孔隙发育特征差异明显。小角 X 射线散射能够得到样品介孔（2～50 nm）的分布特征，结合抽提实验，对比处理前后孔隙分布特征表明细介孔（2～10 nm）是有效的页岩油储集空间，也是影响孔隙结构复杂化的主要贡献者。核磁共振冷孔计法（NMRC）能测量泥页岩纳米级（2～500 nm）开孔孔隙的分布特征，定量表征孔隙率，弥补其它表征方法的不足。东营凹陷地区泥页岩中广泛发育的纳米级粒间孔是页岩油主要的赋存空间。

英文摘要：

The characteristics of the shale in the lower Third Member of Shahejie Formation （E2-3 s^3-x）and the upper Fourth Member of Shahejie Formation （E2-3 s^4-s ） are wide distribution area,large accumulated thickness,high organic matter abundance ,organic matter type of the I type kerogen,which reflect the large exploration potential of shale oil in the Dongying Sag of Bohaiwan Basin.The main structures are layered and lamellar.The main mineral compositions are clay minerals,carbonate minerals,quartz and feldspar of shale.In macro observation,the fracture types of shale development include diagenetic cracks and structural fractures.The main pore types are dissolved pores,crystalline pores and biological pores.In microscopic observation,the pore types include intergranular pores, intragranular pores, intercrystalline pores and dissolved pores. The pores development is significantly different under different matter abundance,type and thermal evolution.Using small-angle X-ray scattering method to obtain the mesoporous （2～50nm）distribution of shale.Compared the mesoporous distribution of sample before and after solvent extraction process,the results display that the micro mesoporous （2～10nm）is an effective reservoir space of shale oil and a major contributor to the complexity of pore structure. NMRC can be used to measure the shale nanoscale （2 ～800 nm）openings pore distribution and get quantitative porosity,which can compensate for the lack of other methods. The extensive development of nano-scale intergranular pores are the main storage space of shale oil in Dongying Sag.