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The Geysers The Nature, Development and Preservation of a Unique Resource. W.T. Box Jr. Vice President-Geothermal Resource Management Calpine Corporation. World Geothermal Provinces. World’s Largest Geothermal Fields (as of 1/01/01). The Big Geysers. The Geysers Resort.
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The Geysers The Nature, Development and Preservation of a Unique Resource W.T. Box Jr. Vice President-Geothermal Resource Management Calpine Corporation
Typical Geysers Injection Well Completion • The well is isolated from the cap rock formation by multiple strings of cemented steel casing. • The well is designed to channel water into the reservoir at depths of 6,000 to 9,000 ft.
Geysers cumulative production and injection, 1961 – 2002 • Throughout most of the field’s history steam production has been much higher than water injection. This created an ever-widening gap (mass deficit) between cumulative extraction and cumulative injection. • Even with the additional injection from the SR GRP and incremental SR GRP, cumulative injection will never replace cumulative production, so “the tank will never fill up.”