Modeling of two-phase flow of high temperature geothermal production wells in the Yangbajing geothermal field, Tibet

Two-phase flow (flow of water in both liquid and gas phase, containing a non-condensable such as CO 2 ) the wellbore is one most important processes production performance scaling evaluations high temperature geothermal wells. This paper first describes discharge tests Yangbajing field, Tibet. Next, simple model for governing two-phase presence constructed robust calculation method presented. The applied to three wells field. results show that velocity difference between phase should be included model. Ignoring this (i.e., homogeneous model) would result significant deviation measurements calculations. A drift flux (DFM) difference, where specifics particular can have effects on pressure profiles wellbore. Three commonly used DFMs are compared estimate their performance. calculated wellhead range 2,3 bar 125°C–135°C all at rate about 20 kg/s. estimated mass fraction 3% 8%. Considering content, different scenarios were evaluated, although effect limited. However, content has much more flash depth, which an parameter estimation calcite scaling.