Abstract: The paper summarized some key points to the quality control of 3D reservoir modeling.A method was proposed to improve the model quality.The method concerns the control of structural framework model and reservoir property model.The key to structural model quality control involves the building of a right fault model to minimize the abnormal morphology grids and defining of the stratigraphic contacts.The key issues for reservoir property model are to keep consistence between the model outputs and well inputs,choose the appropriate variogram parameters,and distribute the net to gross ratio reasonably in the model.Additionally,the streamline simulation and reasonable history match based on the static model may indicate whether the model can reasonably reflect the reservoir heterogeneity.The model quality control method has been applied successfully in many fields for model building.