Analysis And Design Method Of Integrated Production System For Gas Well And Its Software Development

With the further development of the existing gas reservoir and more and more deep gas reservoir put into production,deep wells drainage gas production is facing severe challenge.For the gas wells which used ESP for drainage gas production,the combination of ESP with GL has its outsta nding advantages and important practical significance.Based on the water inflow performance of gas wells and the multiphase flow model,This paper established the mathematical coupling model of flow from formation to wellbore,multiphase flow in wellbore and the coupled system of ESP-GL,put forward the optimization and design method of the combination lift system,regard the water drainage quantity and gas production rate as well as the system efficiency as the objective function to select out the most excellent project,give the quantitative analysis of the significant advantages of combination lift in improving water drainage quantity and reducing the electric pump power.Finally the software is realized and applied in sample wells,calculated the working parameters of GL-ESP system,predicted the wellbore pressure and temperature distribution profile,analyzed the influence of GL-ESP on production rate,the pump depth as well as the pump series,verify the integrity of the software function and the validity of the calculation results.The results showed that the mathematical coupling model can effectively describe the fluid flow under different conditions of combination lift and the design method of the combination system can perfectly meet the demand in deep wells drainage gas production.The evaluation method can select the feasible combination lift of drainage gas recovery project scientifically.