To address the issues of inaccurate productivity evaluation of the western area of Sulige tight sandstone reservoirs, which are caused by multiple influencing factors, complex seepage flow laws, and rapid single-well production establishment. By considering factors such as multiphase flow seepage, stress sensitivity of the reservoir, gas slippage, and high-speed non-Darcy seepage, a production capacity calculation model for western area of Sulige reservoir has been established. Based on a reasonable classification of wells and in combination with typical relative permeability curves, a relationship chart between open flow and WGR has been developed. This has resulted in the formation of a rapid evaluation method for the production capacity of the western area of Sulige reservoir. The results show that for the western area of Sulige reservoir, movable water saturation and stress sensitivity have a significant impact on well open flow, others have a relatively minor impact. Wells are classified into three categories, based on two main indicators: the sand bodies thick encountered and the open flow. New method can calculate gas well production capacity based on the relationship chart between open flow and WGR under different formation pressure levels. The relative error between the calculated open flow and the stable production in actual production is less than 4%, greatly improving the efficiency and accuracy of open flow evaluation of well in t the western area of Sulige reservoir.