| Abstract |
Since 1984, Tokyo Electric Power Co. (TEPCO) has carried out geothermal exploration in Hachijojima. TEPCO selected the southern part of the Higashiyama as a promising geothermal area In 1995, TEPCO drilled three explorations wells in northern part of Nakanogo, with well tests and flow tests, and confirmed high temperature and high-pressure vapor dominated geothermal resources, which are sealed by hydrothermaly altered cap rock. Assessment shows the reservoir has enough potential for power generation of approximately 10 MWe. Now TEPCO is constructing the 3.3MW geothermal power plant to be commercialized in March 1999 using one of these three well: |