虽然在海拉尔盆地乌尔逊凹陷大磨拐河组的油气勘探获得了工业油流,但对其油气分布规律及成藏的主控因素尚存在争议.通过对海拉尔盆地乌尔逊凹陷大磨拐河组地层的构造演化特征研究和系统的油藏解剖,对其油气分布规律及成藏主控因素进行了探讨.分析反转构造、断裂系统以及砂体展布等主控因素认为,油主要分布在反转构造带上,纵向上乌尔逊凹陷北部油主要分布在大磨拐河组一段下部,乌南油主要分布在大磨拐河组二段中部.%In recent years, the hydrocarbon exploration of Damoguaihe Formation in Urxun Sag of Hailar Basin has obtained commercial oil flow, but the hydrocarbon distribution laws and main controlling factors of the reservoir formation have been the foci of the attention and discussion. Through the researches of the tectonic evolution and sys-tematc anatomy of the oil reservoir, the hydrocarbon distribution laws and their main controlling factors are discussed. The analyses of the following main controlling factors such as reverse structure, fault system, sand-body spread and so on show that the oil is generally distributed on the top of the structural be the oil in North Urxun Sag is principally accumulated vertically in Lower Member-1 of Damoguaihe Formation; the oil in the south of the sag is mainly enriched in Middle Member-2 of the formation.
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