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

Title: The Northwest Geysers EGS Demonstration Project, California

Abstract

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.

Authors:

^[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)

Publication Date:: Fri Sep 04 00:00:00 EDT 2015

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

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Office

OSTI Identifier:: 1407327

Alternate Identifier(s):: OSTI ID: 1374680

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

Resource Type:: Accepted Manuscript

Journal Name:: Geothermics

Additional Journal Information:: Journal Volume: 63; Journal Issue: C; Journal ID: ISSN 0375-6505

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 58 GEOSCIENCES; 15 GEOTHERMAL ENERGY; enhanced geothermal systems; the geysers; induced seismicity; reservoir stimulation; shear zones

Citation Formats


                    Garcia, Julio, Hartline, Craig, Walters, Mark, Wright, Melinda, Rutqvist, Jonny, Dobson, Patrick F., and Jeanne, Pierre. The Northwest Geysers EGS Demonstration Project, California.  United States: N. p., 2015. 
Web.  doi:10.1016/j.geothermics.2015.08.003.

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                    Garcia, Julio, Hartline, Craig, Walters, Mark, Wright, Melinda, Rutqvist, Jonny, Dobson, Patrick F., & Jeanne, Pierre. The Northwest Geysers EGS Demonstration Project, California.  United States.  https://doi.org/10.1016/j.geothermics.2015.08.003

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                    Garcia, Julio, Hartline, Craig, Walters, Mark, Wright, Melinda, Rutqvist, Jonny, Dobson, Patrick F., and Jeanne, Pierre. Fri .  
"The Northwest Geysers EGS Demonstration Project, California".  United States.  https://doi.org/10.1016/j.geothermics.2015.08.003.  https://www.osti.gov/servlets/purl/1407327.

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@article{osti_1407327,

  title        = {The Northwest Geysers EGS Demonstration Project, California},

  author       = {Garcia, Julio and Hartline, Craig and Walters, Mark and Wright, Melinda and Rutqvist, Jonny and Dobson, Patrick F. and Jeanne, Pierre},

  abstractNote = {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.},

  doi          = {10.1016/j.geothermics.2015.08.003},

  journal      = {Geothermics},

  number       = C,

  volume       = 63,

  place        = {United States},

  year         = {Fri Sep 04 00:00:00 EDT 2015},

  month        = {Fri Sep 04 00:00:00 EDT 2015}

}

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