As the basis of quantitative reservoir description and prediction of remaining oil saturation, reservoir three dimensional geological modeling is affected by many factors.Through the research and analysis of the structural model and attribute model which affect the modeling quality,the controlling factors of improving the accuracy are obtained,the rationality of establishing geological model is determined by combining the geological model with the actual reservoir reserve re-examination, probability consistency test and dilution test.Taking Block E of Oilfield D as an example, the accuracy of the structural model of the second section of the sand basin is improved by using stratified data, fault model and stratum contact relationship control; the quality and unity of the attribute model are improved by means of data average comparison, variation function physical property fitting and sequential Gauss physical property deterministic simulation.The comparative test results show that the model reserves fit well with a relative error of -1.60% and the parameter trend is consistent, which lays a foundation for further improving the reliability of subsequent simulation.