Lumped parameter model of the Bacon-manito geothermal production field Albay, Philipppines

Abstract

Full-scale exploitation of the Bacon-Manito geothermal production field started when the 110-MWe BacMan 1 power plant was commissioned in 1993 and another 20-MWe BacMan 2-Cawayan modular power plant in 1994. In April 1998, BacMan 2-Botong modular plant was commissioned, adding 20-MWe more to the total power capacity of the field. After six years of continuous field production, a concrete field model for BacMan Geothermal Production Field has yet to be developed. The initial impression is that each production sector responds distinctively to field exploitation. Two lumped-parameter models are presented to assess the fieldís production potential focussing on the pressure response of two production sectors, each responding differently to exploitation. The first model was based on the downhole pressures of PAL-7D, situated in an area where pressure drawdown is minimum. The second model deals on PAL- 16D, a monitor well close to the production sector with the biggest pressure drawdown and enthalpy rise. Satisfactory matches were obtained. Using the best-fit lumped models, the future reservoir pressure response to various production scenarios was simulated.