抄録
In order to evaluate the change in flow characteristics of a geothermal production well with increasing the drilling depth, two-phase flow analysis in a wellbore was carried out assuming the well inlet condition. Pressure at the well inlet was given by the vertical pressure profiles of saturated water whose water level was located at 0 m and -100 m, and inlet steam quality of x1=0 was used. The steam and water flow rates of a 3000 m deep well at a constant well head pressure (P2=10 ata) are estimated 194 t/h and 183 t/h respectively.
