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Title: Newberry Well 55-29 Stimulation Data 2014

The Newberry Volcano EGS Demonstration in central Oregon, a 5 year project begun 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. An initial stimulation was conducted in 2012 and continued for 7 weeks, with over 41,000 m3 of water injected. Further analysis indicated a shallow casing leak and an unstable formation in the open hole. The well was repaired with a shallow casing tieback and perforated liner in the open hole and re-stimulated in 2014. The second stimulation started September 23rd, 2014 and continued for 3 weeks with over 9,500 m3 of water injected. The well was treatedmore » with several batches of newly tested TZIM diverter materials and a newly designed Diverter Injection Vessel Assembly (DIVA), which was the main modification to the original injection system design used in 2012. A second round of stimulation that included two perforation shots and additional batches of TZIM was conducted on November 11th, 2014 for 9 days with an additional 4,000 m3 of water injected. The stimulations resulted in a 3-4 fold increase in injectivity, and PTS data indicates partial blocking and creation of flow zones near the bottom of the well.« less
Publication Date:
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Data Type:
Specialized Mix
Research Org:
DOE Geothermal Data Repository; AltaRock Energy Inc
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Program (EE-2C)
Contributing Orgs:
AltaRock Energy Inc
Country of Publication:
United States
15 Geothermal Energy; geothermal; EGS; Diverter Material; Microseismic Monitoring; Temperature Monitoring; Groundwater Monitoring; stimulation data; Newberry; well data; injectivity; PTS data; Daily Report; operations summary; temperature at depth; well head pressure; DTS; temperature; depth; profile; Flow Test; WHT; WHP; flow rate; flow data; pressure data; backflow report; Geochemistry; groundwater; gas chemistry; field temperature; PLHS; NEWW; Pad-16; Pad-29; NN-17; NN-18; ground water; surface water; geochemistry; ELHS; PCG; VC; Pad 16; Pad 29; Publications; GRC; Stimulation; Results; paper; Demonstration; production well; AltaRock; SGW; Stanford; Presentation; Volcano; 2014; Newberry Volcano; Enhanced Geothermal System; TOUGHREACT; Thermal; Hydrological; Mechanical; Chemical; Pressure Fall-Off; Downhole pressure; 55-29; PTS; presssure; spinner; survey; chart; graph; report; data; monitoring data; seismic data; Seismic; induced seismisity; analysis; final report; Foulger Consulting; Injection; induced seismicity; injection; mitigation; plan; addendum; seismic; event; locations; ISTI; raw; clustered; output; PNSN; Well Construction; wellbore; schematic; casing; hole depths; ultrasonic; flowrate; manual readings; Weir Box