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Newberry EGS Demonstration: Repairing and Re-Stimulating Well 55-29 Report
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 treated 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.
Resources
2 resources available
-
Phase 2.2 Report Appendices.pdf
PDF -
Phase 2.2 Report.pdf
PDF
Complete Metadata
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| description | 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 treated 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. |
| distribution |
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{
"@type": "dcat:Distribution",
"title": "Phase 2.2 Report Appendices.pdf",
"format": "pdf",
"accessURL": "https://gdr.openei.org/files/775/NEGS_Phase2.2_Report_Appendices_070315.pdf",
"mediaType": "application/pdf",
"description": "Appendices for the Phase 2.2 Report"
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{
"@type": "dcat:Distribution",
"title": "Phase 2.2 Report.pdf",
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"accessURL": "https://gdr.openei.org/files/775/NEGS_Phase2.2_Report_Final_070315.pdf",
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"description": "Report detailing the findings of the Newberry EGS Demonstration Phase 2.2 which aimed to repair and re-stimulate Well 55-29."
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|
| identifier | https://data.openei.org/submissions/6968 |
| issued | 2015-07-03T06:00:00Z |
| keyword |
[
"EGS",
"NEWGEN",
"Newberry",
"demonstration",
"diverter material",
"geothermal",
"groundwater monitoring",
"hydraulic",
"microseismic monitoring",
"repair",
"stimulation",
"temperature monitoring",
"well"
]
|
| landingPage | https://gdr.openei.org/submissions/775 |
| license | https://creativecommons.org/licenses/by/4.0/ |
| modified | 2024-07-09T16:57:23Z |
| programCode |
[
"019:006"
]
|
| projectLead | Lauren Boyd |
| projectNumber | EE0002777 |
| projectTitle | Newberry EGS Demonstration |
| publisher |
{
"name": "AltaRock Energy Inc",
"@type": "org:Organization"
}
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|
| title | Newberry EGS Demonstration: Repairing and Re-Stimulating Well 55-29 Report |
