Geometry of border faults and their control effect on oil and gas accumulation in Jiyang Depression

This paper studies the regional structure,formations,style and development of border faults in Jiyang Depression of Bohai Gulf Basin,and discusses their impacts on basin structure,formation development,sedimentary system and reservoir distribution.The study shows that the depression had extended as the improving of evolution degree of border base faults,also optimized was the relevant depositional basin structure,sedimentary characteristics and hydrocarbon index.This may be a common rule in eastern Cenozoic expanding basins and is of guiding significance to basin pre-evaluation.