Abstract
The exploration well MT-2 with a total depth (TD) of 180.02 m was successfully tested using the orifice method with D and D/2 tappings from 22 April to 14 July 2001. The optimum capacity of the MT-2 well is about 16.0 t/h at a commercial well head pressure (WHP) of 5.5 barg, which is equivalent to a power potential of 1.48 MWe, assuming a turbine efficiency of 80 % and outlet pressure of 0.5 bar. At this WHP, the well discharges high enthalpy dry steam (2784.0-2785.3 kJ/kg) with temperatures greater than 163.0℃ （superheated by 20.28-21.28 °C). The draw down analysis of the flow test data is being done to confirm the stable output from the well. The P-T Kuster logging was done five times during bleeding, flowing and pressure buildup test and shows a higher range of temperature (182.40 -192.30 °C) at a depth of 130-175 m. Analysis of the pressure recovery data after shut in indicates that the feed zone has a relatively high flow capacity (14.43 darcy-meters). The high flow capacity seems to be generated during the steam flowing due to a negative skin factor value (-5.583). The superheated steam produced from the well MT-2 has a very low content (0.18 - 0.59 vol% or 0.43 - 1.83 wt%) of non-condensible gases (NCG). Concentrations of H2S, CO2 and residual gas in NCG are about 0.41 - 0.89 ppm, 3.74 - 15.58 ppm and 0 - 0.07 ppm, respectively. Hence, the steam is unlikely to cause corrosion problems.
