Two-Dimensional Numerical Modeling of the Northern Negros Geothermal Field

Abstract

The Northern Negros geothermal field is located in Negros Occidental province, Negros lsland, Philippines. The field has an exploitable resource area of 6 - 9 km2 with a most probable mean reserue estimate of 42 MWe and a maximum potential of 63 MWe sustainable for 25 years. Eight production wells, srfed just outside the Mt. Canlaon National Park, will initially supply the high-pressure and lowpressure sfeam of the 49.37 MWe dual-flash turbine power plant. An Energy Support Zone inside the national park was sef asrde for the additional siting of make-up production wells. The power plant is set to be commissioned in early 2007.

A two-dimensionanl umerical model for the Northem Negros field u/as constructed to determine the long term susfaina bility of the presentp roductiona rea and to project the drilling of make-up wells at the Energy Support Zone. Prediction modeling suggests that the five make-up wells may be drilled at the present production area for the first 13 years of field operation, Additional three make-up wells may have to be drilled inside the buffer zone to have a sustainable steam supply for the remainder of the 25-year operating period.