渤海海域新生代经历了复杂的多期伸展运动，导致交汇型断裂系统异常发育。交汇型断层控制的断块圈闭已经被证明是重要的油气聚集区，但是大量的勘探实践表明交汇断层的油气渗漏程度是成藏差异性的主要原因。综合利用钻井资料、三维地震资料和构造物理模拟技术对交汇断层的封闭性进行研究，结果显示：（1）交汇断层发育演化程度控制了交汇点渗漏强度；（2）油气充注—渗漏相对时间控制了交汇断层的有效封闭时间；（3）早期先存断裂的斜向拉伸作用导致的不同走向断层的应力差异影响断层封闭能力。综合利用上述三个影响因素对渤海油田交汇型断层实钻构造的封闭性进行了模糊综合评价，发现封闭值的大小与实钻圈闭的油柱高度具有良好的正相关关系，证实了该评价方法在多期伸展型交汇断层封闭性评价中的有效性。

Bohai Sea area experienced a complex tectonic evolution history including the multi-stage extension which led to the development of a complicated abutting faults system. Although the formation of abutting faults has been demonstrated to contribute significantly to the hydrocarbon accumulation in the fault block traps, while strong hydrocarbon productivity heterogeneity has appeared in lots of drilling practices, and hydrocarbon leakage was the main cause for some drilling failure. Comprehensive analyses and comparisons combining the 3D seismic, well data, and analogue modeling reveal that three factors are related to the sealing ability of abutting faults: (1) the evolution level of abutting faults determines the degree of leakage in fault intersection; (2) the time interval between charge and leak controls the effective charging timing; (3)difference in stress among faults resulted from oblique extension of pre-existing faults determines the ability of stress sealing. The height of trapped hydrocarbon column derived from drilling data in the structures with abutting faults of Bohai Oilfield shows excellent correlation with the sealing ability analysis based on the above three factors, demonstrating that this method has good application prospects in petroleum exploration in areas with similar structures.