Technical Paper: Numerical Reservoir-Wellbore-Pipeline Simulation Model of The Geysers Geothermal Field, California, USA

Society: Other
Paper Number:
Presentation Date: 2010


The Geysers geothermal field, located in Lake, Sonoma, and Mendocino Counties, California is the largest
developed geothermal system in the world. Electric power generation started at The Geysers in 1960 with a 12 MW (gross) plant. The total installed capacity in the field peaked in 1989 at 2,043 MW. As more and more power plants were built during the 1980s and net mass withdrawals increased, reservoir pressures at The Geysers declined, eventually resulting in steam shortfalls and declining generation levels. This net withdraw is due to the fact that geothermal power plants at The Geysers typically lose about 70 to 80% of produced mass to evaporation in cooling towers, with the balance of mass being returned to the reservoir through injection of steam condensate.

Technical Paper from Proceedings World Geothermal Congress, Bali, Indonesia, 25-29 April 2010

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