Newberry EGS Demonstration: Stimulating the Existing Fracture Network Report
Description
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.
Resources
| Name |
Format |
Description |
Link |
|
33 |
Report detailing the findings of the Newberry EGS Demonstration Phase 2.1 which aimed to stimulate the existing fracture network. |
https://gdr.openei.org/files/774/Phase%202.1%20Report_4.24.14.pdf |
Tags
- demonstration
- egs
- groundwater-monitoring
- temperature-monitoring
- newgen
- stimulation
- microseismic-monitoring
- diverter-material
- hydraulic
- geothermal