Abstract: Yaha field is the largest integrated condensate gas field developed by the cyclic gas injection with high pressure. The condensate gasreservoir is a special and complex gas reservoir, in which condensate hydrocarbon system flows in strata with complicated phase behaviorchanges during the development, and many specific factors affecting condensate oil-gas fluid flow appear compared to a conventional gas reser-voir, such as phase behav ior change of fluid in strata and wellbore as well as oil and gas two-phase flow in the porous media, etc. So the well testanalysis of condensate gas wells is different from other wells. In light of this speciality, a relatively complete set of well test analysis techniquesfor condensate gas wells is successively applied in Yaha field by means of related basic theories and cases. In addition, using past three-yearwell test interpretation results, the reservoir parameter, boundary identification, gas well productivity and pollution effect caused by retrogradecondensation of this field are analyzed for proper recognition of production performance of the condensate gas wells or reservoirs. The results canhelp9rAvd0 bcealifira baseS folina forlborleaelmetrqnigrdmblishing House. All rights reserved.

Key words: Tarim basin, condensate gas field, gas well, well test, application