| Title | Geothermal Prospects of the Eastern Banda Arc Islands (Indonesia) |
|---|---|
| Authors | Manfred P. Hochstein, Jannes Simanjuntak, Sayogi Sudarman |
| Year | 2010 |
| Conference | World Geothermal Congress |
| Keywords | Geothermal exploration, reconnaissance surveys, volcanic arc systems |
| Abstract | About 25 geothermal prospects have been reported for the c. 1000 km long Banda Arc segment stretching from Lombok to Alor Island. Fifteen of these have been explored by ground surveys. Four of the explored prospects have been investigated by exploration drilling. A productive reservoir has been found at two of these, namely at Matalako and Ulumbu, both on Flores Island. A shallow steam cap system has been discovered at Mataloko and a concealed, high temperature, productive outflow at Ulumbu. Deep reservoirs are indicated for the other two drilled prospects (Sokoria on Flores and Atadai on Lembata Island). Overall, the natural heat discharge of the prospects is low: only one prospect (Ulumbu) discharges about 100 MWth. The line density of geothermal prospects along the Eastern Banda Arc segment is significantly lower than that over the adjacent, equally long Java-Bali arc segment which has c. 75 reported geothermal prospects. |