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为了探讨北海盆地油气富集的控制因素,对前人在该区的大量研究成果进行了整理和分析,结果显示,北海盆地三叉裂谷所在的3个地堑具有上下2层不同的结构特征,即晚侏罗世末期的裂谷拉伸运动造就了北海盆地的下构造层,而早白垩世之后的热沉降作用塑造了北海盆地的上构造层;断层主要分布在下白垩统之下的老地层中.北海盆地油气成藏组合主要受下构造层的控制,成藏模式主要表现为中生代砂岩断背斜油气藏,因此,可以认为,北海盆地油气富集的主要控制因素是晚侏罗世-早白垩世的裂谷拉伸运动.“,”Controlling factors on hydrocarbon accumulation in the North Sea Basin were studied in this paper based on previous research data.It reveals that there is a double-layer structure in the trifurcate rift grabens.The lower layer is a faulting structure formed by the movement of stretch rifting by the end of Late Jurassic,while the upper is a depressed structure formed by the thermal subsidence after Early Cretaceous.Most of the main faults occurs in the strata older than Cretaceous.The plays of hydrocarbon accumulation are Mesozoic fault-anticline sandstone controlled by the lower rift structure.Therefore,the rift stretching during Late Jurassic-Early Cretaceous is the main controlling factor to hydrocarbon accumulation.