| Title | Development Potential of the Dauin Geothermal Prospect, Negros Oriental, Philippines |
|---|---|
| Authors | L. F Bayrante, D. Z. Hermoso, M. N. Candelaria, P. I. Pamatian and A. V. .Mejorada |
| Year | 1997 |
| Conference | PNOC-EDC Geothermal Conference |
| Keywords | |
| Abstract | The Dauin geothermal prospect situated 5 km. southeast of the Palinpinon I and 11 sectors was drilled between 1982 and 1983 to test its viability for development. Drilling results indicated that DN-1 was drilled closer to the source region than DN-2 where permeability, temperature, and alteration mineralogy were generally unpromising. On the other hand, DN-1 encountered temperature of at least 240o C, neutral-pH fluid with reservoir chloride of 3000 mg/kg. In particular, the presence of sulphur in the DN-1 discharge provoked debates and much speculation on the nature of the fluid in the area. The area was re-evaluated in 1996 for the following reasons: 1) Renewed interests on other geothermal prospect within the Negros Island from an economic point of view and the success of modular plant development at Pal 11 and other areas in the Philippines; 2) Reinterpretation of the genesis of sulphur contained in DN-1 discharge fluid; 3) Encouraging temperature, permeability and neutral-pH alterations at depth and that of DLY-l discharge fluid; and 4) Reinterpretation of the hydrological model from a geochemical and geological point of view. The study indicates good potential for modular power development. Two approaches are examined to further characterize the area and address concerns pertaining to future development. |