Abstract:
By analyzing the types and accumulation conditions of the subtle reservoirs in Wuxia area,the research on distribu-tion law has been carried out. The subtle traps in Wuxia area have great conditions for hydrocarbon accumulation,such as adequate sources,good reservoirs for sedimentary sand of the thrust activitie,good seal quality,developed unconformi-ties and faults,compositing three-dimensional migration network. Therefore,lithologic reservoirs,stratigraphic res-ervoirs,fractured reservoirs and combination reservoirs have been developed. The research finds that the subtle reservoir distributions are controlled by structure and depositional sys-tem,the favorable developed area is near the unconformities and faults.