Development history of the Tiwi geothermal field, Philippines

Journal Article · Fri Oct 01 00:00:00 EDT 1993 · Geothermics

DOI:https://doi.org/10.1016/0375-6505(93)90028-L· OSTI ID:143817

Gambill, D T; Beraquit, D B ^[1]

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1. Philippine Geothermal, Inc., Makati (Philippines)

Commercial production of electricity from the Tiwi geothermal system began in 1979. In 1982, Tiwi became the world`s first water-dominated system to produce more than 160 MWe. Today the field supplies about 11% of Luzon`s electricity. Initially, the reservoir was single-phase liquid with a small, shallow steam zone on the east side. Temperature reversals in the first wells showed the east to be an outflow zone. As production began, reservoir pressure declined, two-phase conditions developed, and groundwater entered the reservoir from the east. As many productions wells cooled, brine production increased and generation decreased from about 280 MWe in 1983 to about 190 MWe in 1986. Improvements to surface facilities and new wells drilled farther west raised generation to about 280 MWe by mid-1993. Separated brine was first injected into the reservoir, but this lowered steam production; injection is now outside the field.

• OSTI ID: 143817
• Journal Information: Geothermics, Vol. 22, Issue 5-6; Other Information: PBD: Oct-Dec 1993
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
TIWI GEOTHERMAL FIELD
RESERVOIR ENGINEERING
GEOTHERMAL FLUIDS
SCALE CONTROL
POWER GENERATION