Under the strategic goals of carbon peaking and carbon neutrality, CO2 injection for developing tight gas reservoirs not only enhances recovery rates but also facilitates CO2 sequestration, offering broad prospects for application in gas fields. However, this technology is still in the theoretical research stage in China, lacking the foundation for application in gas fields. This paper takes the Linxing-Shenfu gas field as an example and establishes evaluation standards for selecting suitable CO2 injection gas blocks and well sites. Based on these standards, typical gas reservoirs suitable for conducting CO2 sequestration with enhanced gas recovery (CSEGR) are identified. Combining actual geological features, a numerical model is established to conduct numerical simulation research on CO2 injection for enhanced recovery. Furthermore, an assessment of its adaptability is performed from both technical and economic perspectives. The research findings demonstrate that compared to conventional depletion development, CO2 injection can significantly increase the recovery factor of tight gas reservoirs. The simulation compared the differences in enhanced recovery effects under different CO2 injection rates and determined the CO2 injection rate suitable for the target reservoirs. Under different CO2 injection rates, the average increase in recovery rate is 6.2%, affirming the overall feasibility of CO2 injection for enhanced recovery in the Linxing-Shenfu gas field. The research results provide a theoretical basis for the next step of conducting pilot experiments in the Linxing-Shenfu gas field and also hold significant reference value for the implementation of CSEGR in other tight gas reservoirs across the country.