| Title | Geothermal Development in Oguni, Central Kyushu |
|---|---|
| Authors | Toshiyuki TOSHA, Yoshiharu KIDA, Yuzo OBARA, Tomohiro YAMAZAKI, Hidehisa WATANABE |
| Year | 2018 |
| Conference | Stanford Geothermal Workshop |
| Keywords | country report, Kyushu, airborne survey, gravity gradient, variogram, SI index |
| Abstract | The development of renewable energy is expected against not only the global warming but also the disaster of nuclear power plant. METI announced an energy policy and showed a plan of the electricity generation for each energy in 2030. Geothermal energy is desired to install power generation more than 1,500MW under this new policy, which is almost three times of the current installed capacity. Deregulation is being conducted for the development in national parks and many developers are carrying out surveys to find out a new geothermal field and complete the policy. However, achievement of the political goal is so high. The Oguni geothermal field is located in the Kumamoto prefecture, central Kyushu Island, near the Okake and the Hacchobaru Geothermal Power Plants. EPDC (Electric Power Development Co. Ltd, currently J-Power) started to develop in 1983 and evaluated the geothermal potential in the geothermal field. They planned to construct a geothermal power plant with an install capacity of 20MW. In 2002 EPDC resigned the development because of disagreement of few local people for the development. Since then no plan to develop was discussed. In 2015 a small power plant with the capacity of 2MW was installed and gain momentum to construct a bigger power plant. There is, however, no estimation of the additional power generation after the operation of the 2MW power plant and there is no answer to the question whether there is still resource for 20MW electricity generation. We have reviewed models in the Oguni geothermal field and construct a new model covered larger area to answer the question. |