Abstract: The production prediction model of down-hole throttle gas well with well-bore and gas reservoir flow coupling is established in this paper,the temperature and pressure decoupling model and numerical coupling is adopted for single-well production system.It takes tubing-head pressure as setting conditions,rate and downstream temperature are controlled by choke,which can forecast rate and pressure change of gas well by well-test interpretation and history match,and nonlinear well-bore temperature and pressure profile in production process are described.Accordingly,the production performance of throttle gas well can be investigated comprehensively.The route can be extended to multiphase flow and complex well trajectory.

Key words: downhole throttle, coupling model, performance prediction, temperature field