高邮凹陷陈堡及陈堡东地区断层封闭性研究

在复杂断块地区．断层封闭性的研究对于确定油气藏的分布有着极为重要的意义。通过研究断层两盘的岩性配置关系、泥岩涂抹分析、断层活动期与生排烃期的配置及断面力学性质等影响封闭性的因素，对苏北盆地高邮凹陷陈堡及陈堡东地区主要断层进行封闭性分析．最后应用模糊综合评价方法进行综合评判。结果表明：各断层在三垛组沉积期封闭性较差，可作为油气运移的通道，凹陷内生成的油气在此时期可沿断层向上运移，在构造高部位聚集成藏；三垛组沉积末期至今．断层封闭性较好，有利于油气藏的保存。图6表3参9

Fault sealing performance in Chenbao and eastern Chenbao areas, Gaoyou Sag

In complex fault-block regions, it is important to study fault sealing performance to determine the distribution of reservoirs. By several factors that can influence sealing performance, such as the lithologic association on two sides of fault, the mudstone-smearing analysis, the relationship between fault-moving periods and hydrocarbon migration periods, and the mechanical properties of fault, this paper studies the fault sealing performance in Chenbao and eastern Chenbao areas. Fault sealing performance is evaluated using the fuzzy synthesized evaluation method. The results show that fault sealing is worse during the Sanduo stage, in which fault became oil and gas migration pathways. From late Sanduo stage to now, fault sealing is better, which is beneficial to reservoir conservation.