Field Experiments and Model Validation: The EGS Collab Project

The EGS Collab Team

Field Experiments and Model Validation: The EGS Collab Project

The EGS Collab Team

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Scopus citations

Abstract

Implementing enhanced geothermal systems (EGS) will require improvements in understanding stimulation of crystalline rock to create appropriate flow pathways, and the ability to effectively simulate both the stimulation and the flow and transport processes in the resulting fracture network. The US Department of Energy (DOE) is addressing these and other challenges at multiple scales. The EGS Collab project, addressed here, is performing tests and modeling at the 10 m scale. The FORGE project is performing tests at the full reservoir scale. The EGS Collab team created an underground testbed at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, at a depth of approximately 1.5 km to examine hydraulic fracturing (Experiment 1). We are currently building a second testbed at SURF at a depth of about 1.25 km aimed at investigating shear stimulation (Experiment 2). In Experiment 1, we drilled eight boreholes in a well-characterized phyllite and installed geophysical sensors in six of them to create a well-instrumented testbed to allow careful monitoring of stimulation events and flow tests. Numerical simulation was used to answer key experimental design questions, to forecast fracture propagation trajectories and extents, and to analyze and evaluate results both in near-real-time and in detailed process studies. Stimulations performed in this testbed allowed quantification of processes occurring during stimulation and the examination of dynamic flow occurrences. Long-term ambient temperature and chilled water flow tests were performed in addition to many tracer tests to examine system behavior. Our second testbed, targeted at shear stimulation, is currently being built at the SURF Facility at a depth of about 1.25 km in amphibolite under a different set of stress and fracture conditions than Experiment 1.

Original language	English
Title of host publication	55th U.S. Rock Mechanics / Geomechanics Symposium 2021
Publisher	American Rock Mechanics Association (ARMA)
ISBN (Electronic)	9781713839125
State	Published - 2021
Event	55th U.S. Rock Mechanics / Geomechanics Symposium 2021 - Houston, Virtual, United States Duration: Jun 18 2021 → Jun 25 2021

Publication series

Name	55th U.S. Rock Mechanics / Geomechanics Symposium 2021
Volume	5

Conference

Conference	55th U.S. Rock Mechanics / Geomechanics Symposium 2021
Country/Territory	United States
City	Houston, Virtual
Period	06/18/21 → 06/25/21

Funding

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. 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 thank the drillers of Agapito and DA Smith Associates, Inc., for their skill and dedicated efforts to create our test bed boreholes. The earth model output for this paper was generated using Leapfrog Software, copyright © Seequent Limited. Leapfrog and all other Seequent Limited product or service names are registered trademarks or trademarks of Seequent Limited. 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. 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 thank the drillers of Agapito and DA Smith Associates, Inc., for their skill and dedicated efforts to create our test bed boreholes. The earth model output for this paper was generated using Leapfrog Software, copyright ? Seequent Limited. Leapfrog and all other Seequent Limited product or service names are registered trademarks or trademarks of Seequent Limited.

Funders	Funder number
DA Smith Associates, Inc.
United States Government
U.S. Department of Energy
Office of Energy Efficiency and Renewable Energy
Office of Technology Development
Lawrence Berkeley National Laboratory
Geothermal Technologies Office	DE-AC02-05CH11231

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Cite this

@inproceedings{c6cb4b7a78e340f0bff60cc2827b8095,

title = "Field Experiments and Model Validation: The EGS Collab Project",

abstract = "Implementing enhanced geothermal systems (EGS) will require improvements in understanding stimulation of crystalline rock to create appropriate flow pathways, and the ability to effectively simulate both the stimulation and the flow and transport processes in the resulting fracture network. The US Department of Energy (DOE) is addressing these and other challenges at multiple scales. The EGS Collab project, addressed here, is performing tests and modeling at the 10 m scale. The FORGE project is performing tests at the full reservoir scale. The EGS Collab team created an underground testbed at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, at a depth of approximately 1.5 km to examine hydraulic fracturing (Experiment 1). We are currently building a second testbed at SURF at a depth of about 1.25 km aimed at investigating shear stimulation (Experiment 2). In Experiment 1, we drilled eight boreholes in a well-characterized phyllite and installed geophysical sensors in six of them to create a well-instrumented testbed to allow careful monitoring of stimulation events and flow tests. Numerical simulation was used to answer key experimental design questions, to forecast fracture propagation trajectories and extents, and to analyze and evaluate results both in near-real-time and in detailed process studies. Stimulations performed in this testbed allowed quantification of processes occurring during stimulation and the examination of dynamic flow occurrences. Long-term ambient temperature and chilled water flow tests were performed in addition to many tracer tests to examine system behavior. Our second testbed, targeted at shear stimulation, is currently being built at the SURF Facility at a depth of about 1.25 km in amphibolite under a different set of stress and fracture conditions than Experiment 1.",

author = "{The EGS Collab Team} and Kneafsey, {T. J.} and Dobson, {P. F.} and D. Blankenship and Schwering, {P. C.} and Morris, {J. P.} and P. Fu and Hui Wu and White, {M. D.} and Knox, {H. A.} and Ajo-Franklin, {J. B.} and L. Huang and Neupane, {G. H.} and R. Horne and W. Roggenthen and Jon Weers and Doe, {T. W.} and Earl Mattson and T. Baumgartner and K. Beckers and D. Blankenship and A. Bonneville and L. Boyd and S. Brown and Burghardt, {J. A.} and C. Chai and A. Chakravarty and T. Chen and Y. Chen and B. Chi and K. Condon and Cook, {P. J.} and D. Crandall and Dobson, {P. F.} and T. Doe and Doughty, {C. A.} and D. Elsworth and J. Feldman and Z. Feng and A. Foris and Frash, {L. P.} and Z. Frone and P. Fu and K. Gao and A. Ghassemi and Y. Guglielmi and B. Haimson and A. Hawkins and J. Heise and M. Maceira and Y. Polsky",

note = "Publisher Copyright: {\textcopyright} 2021 ARMA, American Rock Mechanics Association; 55th U.S. Rock Mechanics / Geomechanics Symposium 2021 ; Conference date: 18-06-2021 Through 25-06-2021",

year = "2021",

language = "English",

series = "55th U.S. Rock Mechanics / Geomechanics Symposium 2021",

publisher = "American Rock Mechanics Association (ARMA)",

booktitle = "55th U.S. Rock Mechanics / Geomechanics Symposium 2021",

}

TY - GEN

T1 - Field Experiments and Model Validation

T2 - 55th U.S. Rock Mechanics / Geomechanics Symposium 2021

AU - The EGS Collab Team

AU - Kneafsey, T. J.

AU - Dobson, P. F.

AU - Blankenship, D.

AU - Schwering, P. C.

AU - Morris, J. P.

AU - Fu, P.

AU - Wu, Hui

AU - White, M. D.

AU - Knox, H. A.

AU - Ajo-Franklin, J. B.

AU - Huang, L.

AU - Neupane, G. H.

AU - Horne, R.

AU - Roggenthen, W.

AU - Weers, Jon

AU - Doe, T. W.

AU - Mattson, Earl

AU - Baumgartner, T.

AU - Beckers, K.

AU - Blankenship, D.

AU - Bonneville, A.

AU - Boyd, L.

AU - Brown, S.

AU - Burghardt, J. A.

AU - Chai, C.

AU - Chakravarty, A.

AU - Chen, T.

AU - Chen, Y.

AU - Chi, B.

AU - Condon, K.

AU - Cook, P. J.

AU - Crandall, D.

AU - Dobson, P. F.

AU - Doe, T.

AU - Doughty, C. A.

AU - Elsworth, D.

AU - Feldman, J.

AU - Feng, Z.

AU - Foris, A.

AU - Frash, L. P.

AU - Frone, Z.

AU - Fu, P.

AU - Gao, K.

AU - Ghassemi, A.

AU - Guglielmi, Y.

AU - Haimson, B.

AU - Hawkins, A.

AU - Heise, J.

AU - Maceira, M.

AU - Polsky, Y.

PY - 2021

Y1 - 2021

N2 - Implementing enhanced geothermal systems (EGS) will require improvements in understanding stimulation of crystalline rock to create appropriate flow pathways, and the ability to effectively simulate both the stimulation and the flow and transport processes in the resulting fracture network. The US Department of Energy (DOE) is addressing these and other challenges at multiple scales. The EGS Collab project, addressed here, is performing tests and modeling at the 10 m scale. The FORGE project is performing tests at the full reservoir scale. The EGS Collab team created an underground testbed at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, at a depth of approximately 1.5 km to examine hydraulic fracturing (Experiment 1). We are currently building a second testbed at SURF at a depth of about 1.25 km aimed at investigating shear stimulation (Experiment 2). In Experiment 1, we drilled eight boreholes in a well-characterized phyllite and installed geophysical sensors in six of them to create a well-instrumented testbed to allow careful monitoring of stimulation events and flow tests. Numerical simulation was used to answer key experimental design questions, to forecast fracture propagation trajectories and extents, and to analyze and evaluate results both in near-real-time and in detailed process studies. Stimulations performed in this testbed allowed quantification of processes occurring during stimulation and the examination of dynamic flow occurrences. Long-term ambient temperature and chilled water flow tests were performed in addition to many tracer tests to examine system behavior. Our second testbed, targeted at shear stimulation, is currently being built at the SURF Facility at a depth of about 1.25 km in amphibolite under a different set of stress and fracture conditions than Experiment 1.

AB - Implementing enhanced geothermal systems (EGS) will require improvements in understanding stimulation of crystalline rock to create appropriate flow pathways, and the ability to effectively simulate both the stimulation and the flow and transport processes in the resulting fracture network. The US Department of Energy (DOE) is addressing these and other challenges at multiple scales. The EGS Collab project, addressed here, is performing tests and modeling at the 10 m scale. The FORGE project is performing tests at the full reservoir scale. The EGS Collab team created an underground testbed at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, at a depth of approximately 1.5 km to examine hydraulic fracturing (Experiment 1). We are currently building a second testbed at SURF at a depth of about 1.25 km aimed at investigating shear stimulation (Experiment 2). In Experiment 1, we drilled eight boreholes in a well-characterized phyllite and installed geophysical sensors in six of them to create a well-instrumented testbed to allow careful monitoring of stimulation events and flow tests. Numerical simulation was used to answer key experimental design questions, to forecast fracture propagation trajectories and extents, and to analyze and evaluate results both in near-real-time and in detailed process studies. Stimulations performed in this testbed allowed quantification of processes occurring during stimulation and the examination of dynamic flow occurrences. Long-term ambient temperature and chilled water flow tests were performed in addition to many tracer tests to examine system behavior. Our second testbed, targeted at shear stimulation, is currently being built at the SURF Facility at a depth of about 1.25 km in amphibolite under a different set of stress and fracture conditions than Experiment 1.

UR - http://www.scopus.com/inward/record.url?scp=85123376583&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:85123376583

T3 - 55th U.S. Rock Mechanics / Geomechanics Symposium 2021

BT - 55th U.S. Rock Mechanics / Geomechanics Symposium 2021

PB - American Rock Mechanics Association (ARMA)

Y2 - 18 June 2021 through 25 June 2021

ER -

Field Experiments and Model Validation: The EGS Collab Project

Abstract

Publication series

Conference

Funding

UN SDGs

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