The Mathematical Model of Integrated Coupling of Gas Reservoir-Wellbore-Choke in Sulige Gas Field, China

The tight sandstone gas has huge objective reserves in China and great potential for development. Sulige field is the largest China. To prevent hydrates reduce surface pipeline pressure, downhole throttling technology been widely used field, Since wells are prone to liquid accumulation during production, installation of chokes makes phenomenon more complicated, traditional methods difficult simulate predict production performance. In order solve this problem, based on establishment reservoir seepage model, wellbore pipe flow choke nozzle reservoir-wellbore-choke integrated coupling mathematical model its solution method were proposed. case calculation well presented. research results show that new coupled can fully reflect impact fishing fluid effectively performance simulation field.