Newberry EGS Demonstration Phase 2.1 Report

The Newberry Volcano EGS Demonstration in central Oregon, a 3 year project started in 2010, tests recent technological advances designed to reduce the cost of power generated by EGS in a hot, dry well (NWG 55-29) drilled in 2008. First, the stimulation pumps used were designed to run for weeks and deliver large volumes of water at moderate well-head pressure. Second, to stimulate multiple zones, AltaRock developed thermo-degradable zonal isolation materials (TZIMs) to seal off fractures in a geothermal well to stimulate secondary and tertiary fracture zones. The TZIMs degrade within weeks, resulting in an optimized injection/ production profile of the entire well. Third, the project followed a project-specific Induced Seismicity Mitigation Plan (ISMP) to evaluate, monitor for, and mitigate felt induced seismicity. Stimulation started October 17, 2012 and continued for 7 weeks, with over 41,000 m3 of water injected. Two TZIM treatments successfully shifted the depth of stimulation. Injectivity, DTS, and seismic analysis indicate that fracture permeability in well NWG 55-29 was enhanced by two orders of magnitude.

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Additional Info

Field Value
Author AltaRock Energy Inc
Maintainer Trenton T. Cladouhos
bureau_code 019:20
Catalog GDR
Contact Phone 206.729.2400
harvest_object_id cb770e2f-2eba-41ab-b37f-5692ee570321
harvest_source_id 154c8289-1404-4e71-a217-a08000129ad0
harvest_source_title Geothermal Data Repository (GDR)
Origination Date 2014-03-10
program_code 019:006
Sectors Geothermal
was_harvested true

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