Reservoir analysis of the Palinpinon geothermal field, Negros Oriental, Philippines
- Philippine National Oil Co., Fort Bonifacio (Philippines). Geothermal Div.
- Lawrence Berkeley Lab., CA (United States)
The Philippine National Oil Company and Lawrence Berkeley Laboratory have conducted an informal cooperative project on the reservoir evaluation of the Palinpinon geothermal field in the Philippines. The work involved the development of various numerical models of the field in order to understand the observed data. A three-dimensional porous medium model of the reservoir has been developed that matches well the observed pressure declines and enthalpy transients of the wells. Submodels representing the reservoir as a fractured porous medium were developed for the analysis of chemical transport of chlorides within the reservoir and the movement of the cold water front away from injection wells. These models indicate that the effective porosity of the reservoir varies between 1 and 7% and the effective permeability between 1 and 45 millidarcies. The numerical models were used to predict the future performance of the Palinpinon reservoir using various possible exploitation scenarios. A limited number of make-up wells were allocated to each sector of the field. When all the make-up wells had been put on line, power production gradually began to decline. The model indicates that under the assumed conditions it will not be possible to maintain the planned power production of 112.5 MWe at Palinpinon I and 80 MWe at Palinpinon II for the next 30 years, but the decline in power output will be within acceptable normal operating capacities of the plants.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 143825
- Journal Information:
- Geothermics, Vol. 22, Issue 5-6; Other Information: PBD: Oct-Dec 1993
- Country of Publication:
- United States
- Language:
- English
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