| Title | Reservoir Permeability Assessment of the Mindanao Geothermal Field, Philippines |
|---|---|
| Authors | Pioquinto, Winston Philip C. |
| Year | 2006 |
| Conference | Geothermal Resources Council Transactions |
| Keywords | Resource Characterization; reservoir permeability, fractures |
| Abstract | The distribution of reservoir permeability in the Mindanao geothermal field varies generally for each sector (Matingao, Marbel and Sandawa). Steam bearing fractures are either low-angled or high angled with a random to semi-random orientation. The low- angled fractures may be confined to specific strata bounded by steep high-angled fractures which are represented by faults mapped at the surface. Most dominant strike of such subvertical to vertical faults trend NW (Marbel Corridor) and NNE in the Marbel-Sandawa interface. A lithologic break between the Upper sequence and Lower sequence of the Apo Volcanics defined by a claystone horizon also contributed to a field-wide permeability. |