Low permeability reservoirs have high seepage resistance，and the reservoir fracturing is an effective measure to improve the oil well production and development effect. Based on the basic seepage characteristics of well fracturing，the unstable seepage process of well in the elastic energy development is analyzed. By using the fracture microelement method and the superposition principle of pressure drop，a calculation method for the production of fractured wells under different radius is established under the influence of the starting pressure gradient. Combined with actual reservoir conditions，the effects of different reservoir parameters and fracturing parameters on well production，as well as the variation rules of the production and the propagation range of pressure drop in the reservoir，are analyzed. Then，the limit of the effective radius of the oil well in both parallel and vertical fractures and the effective radius that meets the economic daily oil production limit are determined. The study results show that，for the fracturing development of low-permeability reservoirs，the influence of starting pressure gradient and fracture parameters should be comprehensively considered to determine the limit range of oil wells in different directions，and so as to provide scientific basis for the effective development of such reservoirs.