系统分析了国外成熟致密油区的形成条件与典型特征，为研究中国致密油的形成分布与资源潜力评价提供借鉴和参考。研究表明，国外成功致密油区具有“三大形成条件”和“七项基本特征”。三大条件为：大面积分布的致密储层；广覆式分布成熟度适中的腐泥型优质生油层；连续型分布的致密储层与生油岩紧密接触的共生层系。七项基本特征为：圈闭界限不明显；非浮力聚集，水动力效应不明显，油水分布复杂；异常压力，裂缝高产，油质轻；非达西渗流为主；短距离运移为主；纳米级孔喉连通体系为主；规模开采需要水平井技术结合分段压裂技术。从两大方面入手，系统比对了中国致密油的形成条件与典型特征，结果表明中国致密油资源潜力大，具备良好勘探前景。

The formation conditions and typical characteristics of oversea typical tight oil plays are analyzed systematically, which provides referential basis for the tight oil research in China. According to the study, typical tight oil plays oversea are characterized by “3 formation conditions” and “7 basic characteristics”. The 3 formation conditions include wide spread tight reservoir, wide distribution of sapropel type source rock with moderate maturation, close contact between continuous tight reservoir and high quality source rock. The 7 basic characteristics involve indefinite trap boundaries, no-buoyance accumulation and inapparent hydrodynamic effect as well as complicated distribution of oil and water, abnormal pressure and high production related to fractures, no-Darcy flow, short distance migration, nanometer-scale pore-throat connection system, horizontal wells and staged fracturing as vital technologies in the development of tight oil. Based on these two aspects, the formation conditions and typical characteristics of tight oil in China are studied, revealing the huge potential and good exploration prospect of tight oil in China.