目前尚未有划分陆相断陷盆地页岩岩相组合的研究成果和技术方法，不同页岩岩相组合的基本特征还需要进一步明确.在页岩油井取心井段岩心精细观察描述的基础上，利用岩石薄片观察和X射线‒全岩矿物衍射分析明确取心段页岩的基本岩石和岩相类型，通过主要矿物成分及主微量元素测试分析，提取济阳坳陷古近系页岩沉积古环境信息；依据四古环境（古气候、古物源、古盐度、古水深）基本特征，按照沉积环境相似性以及内部结构均一性等原则对东营凹陷沙四上亚段页岩层系进行岩相组合划分，建立了基于沉积环境主控的页岩岩相组合分级划分方案，并结合储层和有机地化分析测试明确了主要岩相组合的储集性和含油性特征.结果表明：（1）东营凹陷沙四上页岩是典型的富碳酸盐页岩（碳酸盐质页岩）和混积型页岩，纹层特征显著，孔隙类型多样，层理缝和构造缝较发育，有机质丰度高，演化程度中等‒低，埋藏深、压力系数高.（2）依据沉积构造部位、古环境，东营凹陷沙四上亚段页岩可划分为8类岩相组合，在盆地中心以发育基质型碳酸盐质页岩岩相组合为主、块状白云岩夹层型页岩岩相组合为辅，在北部陡斜坡带主要发育砂岩夹层型页岩岩相组合，在南部缓斜坡带主要发育块状白云岩夹层型以及纹层状灰质泥岩和白云岩互层等页岩岩相组合.（3）一般地，作为细粒沉积的主体，东营凹陷洼陷中心沙四上亚段基质型页岩层系自底至顶依次发育纹层状泥质灰岩夹块状白云岩相、纹层状泥质灰岩和白云岩互层相、纹层状泥质灰岩和灰质泥岩互层相、纹层状泥质灰岩夹灰质泥岩相、层状泥质灰岩和灰质泥岩互层相、层状泥质灰夹灰质泥岩相等，揭示沉积古环境由干旱、咸水、半深水、少物源向半湿润、半咸水、深水、较多物源的变化.（4）纹层状泥质灰岩夹灰质泥岩组合以及纹层状泥质灰岩和灰质泥岩互层组合最为发育，储集空间类型多样、大孔径孔隙占比高且连通性较好；纹层状泥质灰岩和灰质泥岩互层含油饱和度相对较高，也是目前济阳坳陷页岩油获得突破的一种有利岩相组合类型；纹层状泥质灰岩夹块状白云岩组合具有较好的含油性和脆性.进一步分析不同岩相组合的基本地质特征及含油性特征、厘定主要页岩岩相组合的发育分布特征对陆相断陷盆地页岩油勘探具有现实的指导意义.

There are no relevant research results and technical methods on the classification of shale lithofacies combinations in continental faulted basins, and the basic characteristics of different shale lithofacies assemblages need to be further clarified. Based on the fine observation and description of the core samples, the basic rock and lithofacies types of the sampled shale sections were identified by observing rock thin sections and performing X-ray-based full-rock mineral diffraction analysis. By analyzing the major mineral composition and major and trace element contents of the samples, information about the sedimentary paleoenvironment of the Jiyang Depression was extracted. According to the basic characteristics of the four paleoenvironment factors (paleoclimate, paleosource, paleosalinity, paleowater depth), the shale stratigraphy of the Upper Sub-member of the Fourth Member of Shahejie Formation (Es ₄s) in the Dongying Sag was divided into lithofacies combinations based on the principle of sedimentary environment similarity and internal structure uniformity. A lithofacies combination classification scheme based on sedimentary environment control was established, and combined with reservoir and organic geochemical analysis, the main lithofacies combination reservoir and oil-bearing characteristics were clarified. Results show that: (1) Es ₄s shale in the Dongying Sag is a typical carbonate-rich shale (carbonate shale) and mixed shale, with significant lamination features, various types of pores, well-developed bedding and structural fractures, high organic matter abundance, moderate-to-low evolutionary degree, deep burial depth and high pressure coefficient. (2) Based on sedimentary structural position and paleoenvironment, the Es ₄s shale in the Dongying Sag can be divided into 8 lithofacies combinations. In the central part of the basin, the matrix carbonate shale lithofacies combination is dominant, with some interbedded block dolomite shale lithofacies combination. In the northern steep slope belt, the sandstone interbedded shale lithofacies combination is mainly developed, and in the southern gentle slope belt, the block dolomite shale interbedded lithofacies combination and the laminar carbonate mudstone and dolomite shale interbedded lithofacies combination are mainly developed. (3) In general, as the main body of fine-grained sediments, the Es ₄s matrix shale stratigraphy in the center of the Dongying Sag develops from bottom to top: laminar carbonate shale interbedded with block dolomite shale lithofacies, laminar carbonate shale and dolomite shale interbedded lithofacies, laminar carbonate shale and carbonate mudstone interbedded lithofacies, laminar carbonate shale interbedded with carbonate mudstone lithofacies, laminated carbonate shale and carbonate mudstone interbedded lithofacies, laminated carbonate shale interbedded with carbonate mudstone lithofacies, etc., revealing the change in sedimentary paleoenvironment from arid, brackish water, semi-deep water, and less source rocks to semi-wet, semi-brackish water, deep water, and more source rocks. (4) The laminar carbonate shale interbedded with carbonate mudstone lithofacies combination and the laminar carbonate shale and carbonate mudstone interbedded lithofacies combination are the most developed, with a variety of reservoir space types, high proportion of large-diameter pores and good connectivity. The laminar carbonate shale and carbonate mudstone interbedded lithofacies combination has relatively high oil saturation, and is also a favorable lithofacies combination type for achieving breakthroughs in shale oil in the Jiyang Depression. The laminar carbonate shale interbedded with block-type dolomite shale lithofacies combination has good oil-bearing and brittle properties. Further analysis of the basic geological characteristics and oil-bearing characteristics of different lithofacies combinations and determination of the development and distribution characteristics of the main shale lithofacies combinations are of practical significance for exploring shale oil in continental faulted basins.