Title: |
INCREASED PRODUCTION LOAD IN TONGONAN GEOTHERMAL FIELD, PHILIPPINES: RESERVOIR RESPONSE AND FIELD MANAGEMENT STRATEGIES |
Authors: |
F.X.M. Sta.Ana, V.S. Saw, P.O. Molina, E.T. Aleman, G.F. CaŅete, C.S. Hingoyon, and Z.F. Sarmiento |
Key Words: |
Tongonan, Philippines |
Geo Location: |
Tongonan, Philippines; Leyte |
Conference: |
Stanford Geothermal Workshop |
Year: |
1999 |
Session: |
Field Studies |
Language: |
English |
File Size: |
297KB |
View File: |
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With the commissioning of the different Build-Operate-Transfer (BOT) power plants in the Greater Tongonan geothermal field in 1996-1997, about 600 MWe capacity was added to the national grid. The increased production load has brought significant changes in reservoir responses compared with its behavior when the initial 112.5 MWe plant was commissioned in 1983. These reservoir responses include increased pressure drawdown in the whole field and higher enthalpies in Upper and Lower Mahiao, Sambaloran and Malitbog sectors. On the other hand, cool fluid inflows are detected in one part of the Mahanagdong sector with steam enthalpies recorded in another part due to the pressure drawdown. These reservoir responses has greatly affected the field's steam availability which prompted revisions in injection and production well utilization, and adoption of other field management strategies including steamline interconnection, etc. Reevaluation of previous reservoir modelling studies is also undertaken to update and improve matches of reservoir parameters, and to be able to use the model for better load forecasting.
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