EGS Collab Experiment 1: In-situ observation of pre-, co- and post-seismic shear slip preceding hydraulic fracturing

Guglielmi, Yves; Schoenball, Martin; Cook, Paul; Soom, Florian; Ulrich, Craig; Hopp, Chet; Kneafsey, Timothy; Ajo-Franklin, Jonathan; Dobson, Patrick

doi:10.15121/1768008

Title: EGS Collab Experiment 1: In-situ observation of pre-, co- and post-seismic shear slip preceding hydraulic fracturing

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Abstract

Understanding the initiation and arrest of earthquakes is one of the long-standing challenges of seismology. Here we report on direct observations of borehole displacement by a meter-sized shear rupture induced by pressurization of metamorphic rock at 1.5 km depth. We observed the acceleration of sliding, followed by fast co-seismic slip and a transient afterslip phase. Total displacements were about 7, 5.5 and 9.5 micrometers, respectively for the observed pre-slip, co-seismic slip and afterslip. The observed pre-slip lasted about 0.4 seconds. Co-seismic slip was recorded by the 1 kHz displacement recording and a 12-component array of 3-C accelerometers sampled at 100 kHz. The observed afterslip is consistent with analytical models of arrest in a velocity-strengthening region and subsequent stress relaxation. The observed slip vector agrees with the activation of a bedding plane within the phyllite, which is corroborated by relocated seismic events that were observed during the later stages of the injection experiment. This submission includes the pressure and deformation data recorded by the SIMFIP probe during the first injection at the 164 ft (50 m) notch of borehole E1-I. The injection was performed on on 05/22/2018 as part of Experiment 1 of the EGS Collab project. This data accompanies amore »« less

Authors:: Guglielmi, Yves; Schoenball, Martin; Cook, Paul; Soom, Florian; Ulrich, Craig; Hopp, Chet; Kneafsey, Timothy; Ajo-Franklin, Jonathan; Dobson, Patrick

Publication Date:: Tue May 22 00:00:00 EDT 2018

Other Number(s):: 1289

DOE Contract Number:: EE0032708

Research Org.:: USDOE Geothermal Data Repository (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Program (EE-4G)

Collaborations:: Lawrence Berkeley National Laboratory

Subject:: 15 Geothermal Energy

Keywords:: geothermal; energy; EGS; EGS Collab; SURF; Sanford Underground Research Facility; seismic; injection test; stimulation; slip vector; shear; axial; displacement; pressure; borehole displacement; deformation; SIMFIP; probe; borehole; E1-I; pre-slip; co-seismic; slip; post-seismic; afterslip; hydraulic; fracturing; in-situ

Geolocation:: 44.3544,-103.7465|44.3488,-103.7465|44.3488,-103.7577|44.3544,-103.7577|44.3544,-103.7465

OSTI Identifier:: 1768008

DOI:: https://doi.org/10.15121/1768008

Project Location:

Citation Formats


                    Guglielmi, Yves, Schoenball, Martin, Cook, Paul, Soom, Florian, Ulrich, Craig, Hopp, Chet, Kneafsey, Timothy, Ajo-Franklin, Jonathan, and Dobson, Patrick. EGS Collab Experiment 1: In-situ observation of pre-, co- and post-seismic shear slip preceding hydraulic fracturing.  United States: N. p., 2018. 
        Web.  doi:10.15121/1768008.

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                    Guglielmi, Yves, Schoenball, Martin, Cook, Paul, Soom, Florian, Ulrich, Craig, Hopp, Chet, Kneafsey, Timothy, Ajo-Franklin, Jonathan, & Dobson, Patrick. EGS Collab Experiment 1: In-situ observation of pre-, co- and post-seismic shear slip preceding hydraulic fracturing.  United States.  doi:https://doi.org/10.15121/1768008

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                    Guglielmi, Yves, Schoenball, Martin, Cook, Paul, Soom, Florian, Ulrich, Craig, Hopp, Chet, Kneafsey, Timothy, Ajo-Franklin, Jonathan, and Dobson, Patrick. 2018.  
"EGS Collab Experiment 1: In-situ observation of pre-, co- and post-seismic shear slip preceding hydraulic fracturing".  United States.  doi:https://doi.org/10.15121/1768008.  https://www.osti.gov/servlets/purl/1768008. Pub date:Tue May 22 00:00:00 EDT 2018

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@article{osti_1768008,

  title        = {EGS Collab Experiment 1: In-situ observation of pre-, co- and post-seismic shear slip preceding hydraulic fracturing},

  author       = {Guglielmi, Yves and Schoenball, Martin and Cook, Paul and Soom, Florian and Ulrich, Craig and Hopp, Chet and Kneafsey, Timothy and Ajo-Franklin, Jonathan and Dobson, Patrick},

  abstractNote = {Understanding the initiation and arrest of earthquakes is one of the long-standing challenges of seismology. Here we report on direct observations of borehole displacement by a meter-sized shear rupture induced by pressurization of metamorphic rock at 1.5 km depth. We observed the acceleration of sliding, followed by fast co-seismic slip and a transient afterslip phase. Total displacements were about 7, 5.5 and 9.5 micrometers, respectively for the observed pre-slip, co-seismic slip and afterslip. The observed pre-slip lasted about 0.4 seconds. Co-seismic slip was recorded by the 1 kHz displacement recording and a 12-component array of 3-C accelerometers sampled at 100 kHz. The observed afterslip is consistent with analytical models of arrest in a velocity-strengthening region and subsequent stress relaxation. The observed slip vector agrees with the activation of a bedding plane within the phyllite, which is corroborated by relocated seismic events that were observed during the later stages of the injection experiment. This submission includes the pressure and deformation data recorded by the SIMFIP probe during the first injection at the 164 ft (50 m) notch of borehole E1-I. The injection was performed on on 05/22/2018 as part of Experiment 1 of the EGS Collab project. This data accompanies a manuscript submitted to GRL, linked in this submission.},

  doi          = {10.15121/1768008},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue May 22 00:00:00 EDT 2018},

  month        = {Tue May 22 00:00:00 EDT 2018}

}

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DOI: https://doi.org/10.15121/1768008

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