The oil reservoirs and their spatial distribution relations with their "source rocks, faults and potential energies" are studied for Wuerxun Sag of Hailar Basin, so are done the distributary controlling actions and models of the oil reservoir formation by "the source rocks, faults and potential energies". The controlling action in the formation size by the source rocks is proven; the potential energies control the locations of oil reservoir formation, the low-potential energy area within the inverted fault tilting uplifts controls the oil accumulation and reservoir formation in Nantun and Tongbomiao Formations; and furthermore the low-potential energy area also controls the oil accumulation and reservoir formation in Damoguaihe Formation, the low-potential energy area in the ancient uplift controls the oil accumulation and reservoir formation in base rock; the "faults" dominate oil migration and accumulation,long-term developed faults chock the migration of the generated oil in Nan Member-1 source rocks to Damoguaihe Formation; early expanded faults regulate the oil accumulation in Nantun and Tongbomiao Formations. Proper spatial matching among the above three factor controls the oil reservoir formation and distribution in Wuerxun Sag. However different horizons are characterized by various features; Nantun and Tongbomiao Formations are mainly displayed on the inverted fault tilting uplift; Damoguaihe Formation is principally shown in the inverted structures; the basement rock is focused on the palaeohigh.%研究了海拉尔盆地乌尔逊凹陷油藏和油藏与“源、断、势”之间空间分布关系,以及“源、断、势”对油成藏分布的控制作用及模式,得到:“源”控制油成藏范围;“势”控制油成藏部位,反向断裂翘倾隆起低势区控制着南屯组和铜钵庙组油聚集成藏,反转构造低势区控制着大磨拐河组油聚集成藏,古隆起低势区控制着基岩的油聚集成藏;“断”控制油的运聚,长期发育的断裂控制着南一段源岩生成的油向大磨拐河组中运移,早期伸展断裂控制着南屯组和铜钵庙组油的聚集.“源、断、势”3个因素空间合理匹配控制着乌尔逊凹陷油成藏与分布.但不同层位表现特征不同,南屯组和铜钵庙组主要集中表现在反向断裂翘倾隆起上,而大磨拐河组则集中表现在反转构造上,基岩集中表现在古隆起上.
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