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.