Abstract: According to the increasingly severe exploitation conflicts and the reservoir heterogeneity characteristics in L6 Block of Wuqi Oil Production Plant, the paper adopts phased stochastic modeling technology to establish the geological model of fine reservoir in this area. The structure model is established by the fine dividing of small layer, and according to the characteristics of dense well pattern, the combination of rock facies and sedimentary facies method is applied. The sedimentary facies model is established by the sequential indicator simulation method. Under the control of sedimentary facies, the reservoir physical model is established by using sequential Gaussian simulation, which successfully achieved the fine description of reservoir in L6 Block. The study lays a good foundation to improve the accuracy of reservoir numerical model, and provide scientific references to the exploitation of remaining oil.