Abstract:

Based on the core and logging datum,and through the research of mudstone's colors,granularity distribution,sedimentary structures,fossils,rock types and their association in the fourth Member of the Quantou Formation in Fuyu oilfield in south part of Songliao basin,it confirmed that the sedimentary environment here was shallow delta facies.Furthermore,it was classified two subfacies of delta plain and delta front.The plan distribution map of sedimentary microfacies of Fuyu oilfield was draw,and based on it,the sedimentary model of Fuyu oilfield was established and the evolutionary characters were also studied.All of those offer basis for increasing reservoir in old oilfields.

Key words: shallow delta facies, sedimentary characteristic, sedimentary model, Quan-4 Formation of Fuyu oilfield, Songliao Basin