EGS Collab Testbed 1- Common Discrete Fracture Network


This package includes data and models that support hydraulic fracture stimulation and fluid circulation experiments in the Sanford Underground Research Facility (SURF). A paper by Schwering et al. (2020) describes the deterministic basis for developing a "common" discrete fracture network (CDFN) model of significant natural fractures in EGS Collab Testbed 1 on the 4850-Level of SURF. The ReadMe for this model shows drift, wells, scanlines, fracture data, interpreted fractures, and geophysical visualizations. There is also a summary of the data that was used in this experiment and includes results from reviewing core, televiewer (TV) logs, core-TV depth/feature registration, and from mapping weeps in the 4850-Level drift. The CDFN is intended to be a baseline model of the pre-stimulated testbed (though some observations from stimulation helped inform the model).

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Additional Info

DOE Project Name: EGS Collab
DOE Project Number: EE0032708
DOE Project Lead: Lauren Boyd
DOI: 10.15121/1632116
Last Updated: 4 months ago
Data from September, 2019
Submitted May 28, 2020


Sandia National Laboratories


Publicly accessible License 


Paul Schwering
Sandia National Laboratories
Tom Doe
W.M. Roggenthen
South Dakota School of Mines and Technology
N. Uzunlar
South Dakota School of Mines and Technology
C. Reimers
South Dakota School of Mines and Technology
G.H. Neupane
Idaho National Laboratory
H. Johnston
National Renewable Energy Laboratory
P.F Dobson
Lawerence Berkeley National Laboratory
C. Ulrich
Lawerence Berkeley National Laboratory
A. Singh
Stanford University


geothermal, energy, EGS Collab, SURF, hydraulic, fracturing, stimulation, Sanford Underground Research Facility, experiment, EGS, geophysics, fracture, network, discrete fracture network, DFN, fluid, flow, model, data, fluid circulation, borehole, weep, core, system, enhanced geothermal system, Sandia National Laboratories, electrical resistivity, well, injection test, tracer, drilling


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