Abstract: Dupo oilfield is characterized by complex reservoirs and strong heterogeneity,which seriously hindered oilfield development and production at the later stage,and therefore it is the urgent need to carry out fine 3D reservoir modeling and provide basis for the heterogeneity of the reservoir space characteristics research.Through the research on fine structure and fault combination,the reservoir structure model in the study area has been established.Under the control of tectonic framework,by using the deterministic and stochastic modeling methods,high precision reservoir sedimentary facies model in the study area has been established.Guided by the phased reservoir parameter modeling,physical properties have been described according to sedimentary facies,and the three-dimensional physical distribution models have been established which is suitable for reservoir characteristics.From the perspective of the three-dimensional,the models describe the reservoir space distribution characteristics of Dupo oilfield and it reveals the reservoir,its physical properties and complex heterogeneity characteristics,which achieves the purpose of developing comprehensive geological research and provides powerful guidance for oilfield development adjustment and residual oil tapping of Dupo oilfield.