| Title | The Ulumbu Geothermal Development West Flores, Eastern Indonesia |
|---|---|
| Authors | Asnawir Nasution, Yudistian Yunis, Miman Afif |
| Year | 2016 |
| Conference | Asian Geothermal Symposium |
| Keywords | Geothermal, geosciences, drilling, development |
| Abstract | The Ulumbu geothermal power produces 4 x 2.5 MW in 2014, the energy goes to neighbouring districts and the future they will across mainland Flores. The reservoir of geothermal system is formed by the Old Quaternary volcanic rocks, where the basement compose of the Tertiary volcanic and sedimentary rocks. The geothermal system is steam dominated, with temperature of 230 - 240°C.The reservoir thickness has 300-400 m, where the top at 600 m and estimated the lowest reservoir at depth of 900 to 1100 m. Drill cores show that both high density and high aperture values, identify good permeable zones. Influence of subsurface geology on permeable zone location had likewise been observed for shallower feed zones. Additional studies indicate distribution of new prospects are to the northwest of Ulumbu and the area may also be used for reinjection locations. The geothermal prospect may produce approximately 160 MW. |