Abstract: Shuang-6 Gas Storage in Liaohe oilfield is the largest gas cap and oil ring gas storage with edge and bottom water in China and there is no mature experience. Gas production capacity of injection-production wells is the key to peak shaving of the gas storage. Taking Well X as an example, a method suitable for Shuang-6 Gas Storage is established to evaluate gas production capacity of injection-production wells. The critical differential pressure of reservoir sand production is determined through indoor sand production experiment of cores; a binomial productivity equation for injection-production wells is established through systematic well testing; the critical differential pressure of reservoir sand production is substituted into the binomial productivity equation for injection-production wells and gas production capacity that reservoirs can support is obtained. The gas production capacity is constrained according to erosion flow rate in injection-production pipes of different sizes. The comprehensive evaluation results show that in Well X the upper limit of gas production rate that the reservoir can support reaches 282×104 m3/d, but constrained by erosion flow rate, the upper limit of gas production rate is determined as 122×104 m3/d.