Abstract:Water-producing gas wells usually adopt the idea of high production and low allocation, low production and high allocation, and use the empirical production allocating of non-resistance flow rate to determine the production system of gas wells. In order to improve the ability to liquid-carrying of water-producing gas wells and reduce the cost of drainage gas production, a quantitative method for determining the minimum liquid-carrying production allocation was established, and the variation law of gas production and wellbore critical liquid-carrying production under different production allocation systems was demonstrated, which achieved good application results in Shenfu gas field. The results show that according to the formation pressure,α coefficient of the block and string size, the minimum liquid-carrying production equation of the block can be established. Through numerical solution, the liquid-carrying production under different string or the allocation ratio chart considering liquid-carrying can be obtained.The minimum liquid-carrying production allocating ratio is higher and changes rapidly at lower non-resistance flow rate conditions, rather than the proportion of single experience allocation ratio.The minimum liquid-carrying production allocation is greatly affected by the size of the string, the non-resistance flow rate and the formation pressure, and it is less affected by a coefficient. It is concluded that the established minimum liquid-carrying production allocation method can effectively reduce the occurrence of wellbore effusion in the early stage of gas well production, which has a certain guiding role in the rational production allocation, string optimization and production performance analysis of water-producing gas wells.