中文摘要：

依据三塘湖盆地致密油勘探最新资料,对二叠系芦草沟组二段混积岩系统开展了致密油＂七性＂关系评价。芦二段发育一套新型的优质烃源岩层系,呈楔状分布,厚度大,有机质丰度高、类型好、整体处于生油窗内;芦二段岩性复杂,为一套由陆源碎屑、空落火山灰、碳酸盐3大类按不同比例频繁混积而成的纹层构造混积岩组合;宏观电性特征为低自然伽马、高电阻率;储集层物性非均质性强,基质孔隙以微孔为主,具有特低孔、超低渗的特点,裂缝提供了一定储集空间,对渗流贡献巨大;芦二段含油性好,常规取心分析含油饱和度在15%~80%;芦二段脆性矿物含量高（80%~90%）,黏土矿物含量普遍小于10%;岩心敏感实验显示芦二段水敏及速敏差异变化大,酸敏普遍较弱。通过对芦二段的＂七性＂关系评价,认为这套源储一体的致密油的＂成藏＂主控因素是烃源岩成熟度和储集层物性,优选出芦草沟组二段有利混积岩致密油＂甜点区＂,即凹陷成熟烃源岩范围内的储集层物性优越区。

英文摘要：

Based on the latest exploration data of tight oil, the evaluation of the ＂seven properties＂ relation of diamictite tight oil in the second Member of the Permian Lucaogou Formation in Santanghu Basin was carried out. The second Member of the Lucaogou Formation developed a new suit of high-quality hydrocarbon source rocks, which are characterized by wedging distribution, big thickness, high organic content and good organic type, and the overall being in the oil-generating window. Complex in lithology, the second Member of the Lucaogou Formation is a set of laminated structure diamictite combination composed of detrital material of terrigenous origin, dust fall, carbonate rock in variable proportions. With low natural gamma and high electrical resistivity, strong heterogeneity, micropores as main matrix porosity, it has features of ultra-low porosity and extra-low permeability; the fractures in it provide some reservoir space, and make great contribution to permeability. The Member has good oiliness（oil saturation from conventional core analysis is 15%-80%）, high content of brittle minerals（80%？90%）, clay mineral content of less than 10% in general; core sensitivity test shows that it varies widely in water sensitivity and velocity sensitivity, and is weak in acid sensitivity. Through evaluating the ＂seven properties＂ relation, it is concluded that the main control factors of the tight oil layer are the maturity of hydrocarbon source rock and reservoir physical property. The ＂sweet spots＂ of diamictite tight oil in the second Member of the Lucaogou Formation were selected, that is, the areas with favorable reservoir physical properties in the mature hydrocarbon source rock of the sag.