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文中着重阐述了断裂封闭性的研究方法。定性研究以断裂的力学性质和断裂两侧岩性对置情况为重点，同时结合断裂几何学特征、断裂活动强度、断裂形成时期与油气成藏期匹配关系以及断裂与构造应力场关系分析方法。半定量－定量研究新引入排驱压力分析、油藏描述技术－断层封堵量计算和断层泥涂抹计算以及断层封闭性模糊综合评判等新技术，将断裂评判为不封闭、封闭较好和封闭最好三种类型。不封闭的断裂为油气运移的通道，封闭较好和封闭最好的断裂遮挡油气，聚集成藏。
The article focuses on the study of fracture sealing method. Qualitative research focuses on the fracture mechanics and lithology confrontation on both sides of the fracture. At the same time, combining the fracture geometry, the activity intensity of the fault, the matching relationship between the fracture forming time and the hydrocarbon accumulation period and the relationship between the fracture and the tectonic stress field. Semi-quantitatively-quantitatively, new technologies such as pressure analysis of newly introduced drainage and displacement, reservoir description technology, calculation of fault sealing volume, calculation of fault mud smear and fuzzy comprehensive evaluation of fault sealing and other new techniques are applied to evaluate faults as closed, closed and closed The best three types. Non-closed fractures are channels for migration of oil and gas. Well-closed and well-closed faults block oil and gas accumulation and accumulate into reservoirs.