Abstract: Facies-controlled modeling with geological con- straint is the kernel of improving reservoir modeling accu- racy.Taking the oil set C6 in Zhenjing oilfield as an ex- ample,the basic principles and steps have been studied, which include building and comparison of isochromatic stratigraphic framework,sedimentary model analysis,op- timum selection and improvement of stochastic simulation method,the building of quantitative geological knowledge data base and 3-D stochastic modeling.Compared with conventional method,this way of modeling improves the quantitative application of 3D modeling and the results are more in accordance with underground geologic bodies.