The Northwest Geysers EGS Demonstration Project, California

Garcia, Julio; Hartline, Craig; Walters, Mark; Wright, Melinda; Rutqvist, Jonny; Dobson, Patrick F.; Jeanne, Pierre

doi:10.1016/j.geothermics.2015.08.003

The Northwest Geysers EGS Demonstration Project, California

Journal Article · Fri Sep 04 00:00:00 EDT 2015 · Geothermics

DOI:https://doi.org/10.1016/j.geothermics.2015.08.003· OSTI ID:1407327

^[1]; Hartline, Craig ^[1]; ^[1]; Wright, Melinda ^[1]; Rutqvist, Jonny ^[2]; Dobson, Patrick F. ^[2]; Jeanne, Pierre ^[2]

Calpine Corporation, Middletown, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Our project goal is to demonstrate the feasibility of stimulating a deep high-temperature reservoir (HTR) (up to 400 °C, 750 °F). There were two previously abandoned wells, Prati State 31 (PS-31) and Prati 32 (P-32), reopened and deepened to be used as an injection and production doublet to stimulate the HTR. The deepened portions of both wells have conductive temperature gradients of 10 °F/100 ft (182 °C/km), produce connate native fluids and magmatic gas, and the rocks were isotopically unexchanged by meteoric water. The ambient temperature meteoric water injected into these hot dry rocks has evidently created a permeability volume of several cubic kilometers as determined by seismic monitoring. Preliminary isotopic analyses of the injected and produced water indicate that 50–75% of the steam from the created EGS reservoir is injection-derived.

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Office (EE-4G); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Office

Grant/Contract Number:: AC02-05CH11231; FC36-08GO18201

OSTI ID:: 1407327

Alternate ID(s):: OSTI ID: 1374680

Journal Information:: Geothermics, Journal Name: Geothermics Journal Issue: C Vol. 63; ISSN 0375-6505

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cloud-fracture networks as a means of accessing superhot geothermal energy Watanabe, Noriaki; Sakaguchi, Kiyotoshi; Goto, Ryota Scientific Reports, Vol. 9, Issue 1 https://doi.org/10.1038/s41598-018-37634-z	journal	January 2019
Moment Tensors of Induced Microearthquakes in The Geysers Geothermal Reservoir From Broadband Seismic Recordings: Implications for Faulting Regime, Stress Tensor, and Fluid Pressure Yu, Changpeng; Vavryčuk, Václav; Adamová, Petra Journal of Geophysical Research: Solid Earth, Vol. 123, Issue 10 https://doi.org/10.1029/2018jb016251	journal	October 2018
The risks of long-term re-injection in supercritical geothermal systems Parisio, Francesco; Vilarrasa, Victor; Wang, Wenqing Nature Communications, Vol. 10, Issue 1 https://doi.org/10.1038/s41467-019-12146-0	journal	September 2019
Analysis of seismic moment tensors and in situ stress during Enhanced Geothermal System development at The Geysers geothermal field, California Boyd, O. Sierra; Dreger, Douglas S.; Gritto, Roland Geophysical Journal International, Vol. 215, Issue 2 https://doi.org/10.1093/gji/ggy326	journal	August 2018

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15 GEOTHERMAL ENERGY
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