在常规套管射孔井产能预测的基础上 ,考虑射孔炮眼内的充填砾石、筛套环空砾石层以及筛管造成的附加表皮 ,建立了筛管砾石充填防砂井的产能预测模型。计算分析表明 ,炮眼砾石层及地层是主要压降区域 ,充填后砾石层的渗透率及射孔参数是影响砾石充填井产能的主要因素 On the basis of predicting the productivity of conventional casing perforating wells, the production capacity prediction model of gravel-packed sand control wells was established by considering the filling gravel in the perforated blasthole, the annular casing gravel layer and the additional skin caused by the screen. Computation and analysis show that the blasthole gravel layer and formation are the main pressure drop areas. The permeability and perforation parameters of the gravel layer after filling are the main factors affecting the productivity of the gravel pack