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Title: Geodetic measurements and numerical models of transient deformation at Raft River geothermal field, Idaho, USA

Journal Article · · Geothermics
 [1]; ORCiD logo [2];  [3];  [4];  [5]; ORCiD logo [6]; ORCiD logo [2]
  1. Univ. of Wisconsin, Madison, WI (United States); AIR-Worldwide, Boston, MA (United States)
  2. Univ. of Wisconsin, Madison, WI (United States)
  3. Univ. of Utah, Salt Lake City, UT (United States)
  4. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  5. US Geothermal Inc., Boise, ID (United States)
  6. Temple Univ., Philadelphia, PA (United States)

Here, we perform synthetic aperture radar interferometry using data acquired between 2004 and 2016 by the Envisat, and ALOS-2 satellite missions to measure transient deformation at the Raft River geothermal field in Cassia County in Southern Idaho where geothermal production began in late 2007. Time-series analysis of multiple interferometric pairs indicates uplift at an exponentially decaying rate, over an ~8 km-by-5 km area centered near three injection wells that recycle produced brine. Similarly, subsidence at an exponentially decaying rate is observed in a 4 km-by-4 km area west of the production wells. These two signatures stay in the same location in all of the well-correlated Envisat interferometric pairs spanning the time interval between 2007 and 2010. The boundary separating the uplifting and subsiding areas is associated with the steeply dipping Bridge fault zone. Using two-dimensional numerical models, we explore first-order, bi-directional coupling between hydrological and mechanical processes. Our results suggest that: (i) most of the deformation occurs due to pore pressure changes following the start of geothermal production, (ii) the rate of deformation decays to zero over a time scale on the order of ~5 years as the system reaches steady state, and (iii) a reservoir-scale permeability of the order of ~1E–14 m2 is required to explain the transient deformation.

Research Organization:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Office; National Science Foundation (NSF)
Grant/Contract Number:
EE0006760; EE0005510; EAR-1347190; DGE-1256259
OSTI ID:
1630100
Alternate ID(s):
OSTI ID: 1693607
Journal Information:
Geothermics, Vol. 74, Issue C; ISSN 0375-6505
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

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Cited By (3)

Spatio–Temporal Analysis of Deformation at San Emidio Geothermal Field, Nevada, USA Between 1992 and 2010 journal August 2019
Inferring Geothermal Reservoir Processes at the Raft River Geothermal Field, Idaho, USA, Through Modeling InSAR-Measured Surface Deformation journal May 2018
Wastewater leakage in West Texas revealed by satellite radar imagery and numerical modeling journal October 2019