Aimed at the complex models in heavy oil performance history and its attached affections in sand control,the gravel pack mechanism is studied in this paper. The productivity predicting models and the flow model of the sand control well was established. Based on the conventional perforated casing productivity prediction,the regional flow drag force and skin factors were considered. The pressure loss mainly occurs in the perforations. The pressure drop is analyzed by case study,whichproved that the permeabili...