鄂尔多斯盆地三叠系延长组长7油层组湖相细粒沉积岩中发育泥质滑塌岩、泥质碎屑岩、泥质浊积岩、泥质异重岩等重力流沉积，但此前的研究多聚焦于砂岩储层，对泥质重力流沉积极少关注。随着页岩油气勘探开发研究的不断深入，泥、页岩及其所夹粉砂岩等细粒沉积岩的沉积机理必将受到越来越多的重视。本项目以长7油层组湖相细粒沉积岩为研究对象，通过大比例尺野外（岩心）观测与素描、大尺寸薄片观测、扫描电镜及能谱分析、X-射线微区衍射分析、激光粒度分析、阴极发光分析，识别泥质重力流沉积，把握其沉积特征与鉴识标志。结合水槽模拟实验，研究泥质重力流流体类型的转化，分析泥质重力流沉积动力学过程，探索泥质重力流对细粒物质的搬运-沉积机理，建立泥质重力流沉积模式。本项目不仅对于湖相细粒物质沉积学研究具有科学价值；而且对于湖相页岩油气储层形成机理、储集性能、分布规律及脆性矿物组分工业参数研究具有重要的现实意义。

Mudstone olistolites, mudstone debrites, mudstone turbidites, mudstone hyperpycnites, etc. lacustrine slurry gravity flow deposits were well developed in the YC7 oil member Yanchang Formation, Ordos Basin. However, instead of scarce research on slurry gravity flow deposits, most of the existed literatures were focused on sandstone reservoirs. With deepening studies on exploration and exploitation of shale oil and gas, more and more attentions will be paid to depositional mechanisms of fine-grained sediments, such as mudstone, shales and interbedded siltstone. .In order to distinguish slurry gravity flows generated fine-grained sediments and to understand their sedimentary characteristics and identifying criteria, this study aims at lacustrine fine-grained sediments in the YC7 oil member by means of large scale observations and sketches on field profiles and cores, observations on ultra-scale slices, scanning electron microscopy and energy spectrum analysis, micro-zone X-ray diffractions, laser particle size analysis, and cathode luminescence analysis. Combining with flume simulation experiments, this project study on slurry gravity flows generated fine-grained sediments, in order to: ① study on slurry gravity flows transformations, ② analyze their dynamics depositional processes, ③ probe into their transportation and deposition mechanisms, and ④ establish their depositional models. This research project has not only scientific values to theoretical study on sedimentology of lacustrine slurry gravity flow generated fine-grained sediments, but also has important practical significances to probe into forming mechanisms of lacustrine shales reservoirs and their reserve capability, distribution regularities and brittle mineral components industrial parameters.