TY - GEN
T1 - Characterizing rock fractures and physical properties for Experiment 2 of the EGS Collab Project, Sanford Underground Research Facility
AU - Ulrich, C.
AU - Dobson, P. F.
AU - Kneafsey, T. J.
AU - Roggenthen, W. M.
AU - Uzunlar, N.
AU - Doe, T. W.
AU - Neupane, G.
AU - Artz, T.
AU - Dobler, K.
AU - Schwering, P.
AU - Smith, M.
AU - Burghardt, J. A.
N1 - Funding Information:
This material was based upon work supported by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy (EERE), Office of Technology Development, Geothermal Technologies Office, under Award Number DE-AC02-05CH11231 with LBNL and other awards to other national laboratories. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525. This paper describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the paper do not necessarily represent the views of the U.S. Department of Energy or the United States Government. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.The United States Government retains, and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The research supporting this work took place in whole or in part at the Sanford Underground Research Facility in Lead, South Dakota. The assistance of the Sanford Underground Research Facility and its personnel in providing physical access and general logistical and technical support is gratefully acknowledged. We also thank the crew from RESPEC, who logged the core upon recovery from drilling,
Publisher Copyright:
© 2022 ARMA, American Rock Mechanics Association.
PY - 2022
Y1 - 2022
N2 - The EGS Collab project is focused on understanding and predicting permeability enhancement and evolution in crystalline rocks to support geothermal energy production. To support this effort, the project is creating a suite of intermediate-scale test beds coupled with stimulation and interwell flow tests that will provide a basis to better understand the fracture geometries and processes that control heat transfer between rock and stimulated fractures. Therefore, high level site characterization is paramount for building models to estimate potential interwell flow rates and heat exchanges. For the second experimental testbed, the EGS Collab team visually mapped the distribution, orientation, and nature of open and healed fractures exposed along the drift wall in the Sanford Underground Research Facility 4100 feet below ground surface, and within the eleven boreholes drilled for this test bed. Continuous core logging of each borehole and a suite of geophysical wireline logs was collected to characterize the spatial variability of rock properties and fracture orientations. All of the data were then compiled into multiple 3D visualization software packages for interpretation and further analyzed for slip and dilation tendencies that will be incorporated into coupled-process geomechanical flow and transport models to better constrain the planned flow and tracer tests.
AB - The EGS Collab project is focused on understanding and predicting permeability enhancement and evolution in crystalline rocks to support geothermal energy production. To support this effort, the project is creating a suite of intermediate-scale test beds coupled with stimulation and interwell flow tests that will provide a basis to better understand the fracture geometries and processes that control heat transfer between rock and stimulated fractures. Therefore, high level site characterization is paramount for building models to estimate potential interwell flow rates and heat exchanges. For the second experimental testbed, the EGS Collab team visually mapped the distribution, orientation, and nature of open and healed fractures exposed along the drift wall in the Sanford Underground Research Facility 4100 feet below ground surface, and within the eleven boreholes drilled for this test bed. Continuous core logging of each borehole and a suite of geophysical wireline logs was collected to characterize the spatial variability of rock properties and fracture orientations. All of the data were then compiled into multiple 3D visualization software packages for interpretation and further analyzed for slip and dilation tendencies that will be incorporated into coupled-process geomechanical flow and transport models to better constrain the planned flow and tracer tests.
UR - http://www.scopus.com/inward/record.url?scp=85149243202&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85149243202
T3 - 56th U.S. Rock Mechanics/Geomechanics Symposium
BT - 56th U.S. Rock Mechanics/Geomechanics Symposium
PB - American Rock Mechanics Association (ARMA)
T2 - 56th U.S. Rock Mechanics/Geomechanics Symposium
Y2 - 26 June 2022 through 29 June 2022
ER -