Accumulation characteristics research of Fuyang oil layers in eastern area of Yushulin

Based on the research of sequence stratigraphy, structure characteristics, sedimentary characteristics and reservoir characteristics of Fuyang oil layers in eastern area of Yushulin, the detailed analysis of accumulation conditions, reservoir types and accumulation modes and oil-water distribution regularity have been carried out. The results show the area has abundant oil sources, good sand bodies, rich traps, good petroleum migration pathways and stable regional caprock, which can provide good accumulation conditions for research area. Besides, the results indicate the combination type of fault and lithology traps is most favorable for hydrocarbon accumulation and there are two main accumulation modes, one is the vertical migration inside source rock and the other is lateral migration outside source rock. By considering sand bodies' distribution, structural characteristics, hydrocarbon distribution regularity and oil sources direction, the research area can be divided into two favorable hydrocarbon accumulation zones and one risk zone.