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Title: EGS Collab Experiment 1: SIMFIP Notch-164 GRL Paper

Abstract

Characterizing the stimulation mode of a fracture is critical to assess the hydraulic efficiency and the seismic risk related to deep fluid manipulations. We have monitored the three-dimensional displacements of a fluid-driven fracture during water injections in a borehole at ~1.5 km depth in the crystalline rock of the Sanford Underground Research Facility (USA). The fracture initiates at 61% of the minimum horizontal stress by micro-shearing of the borehole on a foliation plane. As the fluid pressure increases further, borehole axial and radial displacements increase with injection time highlighting the opening and sliding of a new hydrofracture growing ~10 m away from the borehole, in accordance with the ambient normal stress regime and in alignment with the microseismicity. Our study reveals how fluid-driven fracture stimulation can be facilitated by a mixed-mode process controlled by the complex hydromechanical evolution of the growing fracture. The data presented in this submission refer to the SIMFIP measurements and analyses of the stimulation tests conducted on the 164 ft (50 m) notch of the Sanford Underground Research Facility (SURF), during the EGS-Collab test 1. In addition to the datafiles, there is the draft of a manuscript submitted to Geophysical Research Letters (GRL).

Authors:
Publication Date:
Other Number(s):
1250
DOE Contract Number:  
EE0032708
Research Org.:
USDOE Geothermal Data Repository (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Program (EE-2C)
Collaborations:
Lawrence Berkeley National Laboratory
Subject:
15 Geothermal Energy
Keywords:
geothermal; energy; SIMFIP; New borehole instrument; hydrofracture; EGS Collab; nucleate; anisotropy; shear displacement; wellbore; experiment; stimulation; seismic; seismicity; fracture; hydraulic conductivity; stress; shear; borehole; micro-shearing; foliation; injection test; Sanford Underground Research Facility; SURF; EGS; hydraulic; geophysics; displacement; flow rate
Geolocation:
40.408690733938,-110.784725|36.333052589625,-110.784725|36.333052589625,-114.640825|40.408690733938,-114.640825|40.408690733938,-110.784725
OSTI Identifier:
1671635
DOI:
https://doi.org/10.15121/1671635
Project Location:

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Citation Formats

Guglielmi, Yves. EGS Collab Experiment 1: SIMFIP Notch-164 GRL Paper. United States: N. p., 1969. Web. doi:10.15121/1671635.
Guglielmi, Yves. EGS Collab Experiment 1: SIMFIP Notch-164 GRL Paper. United States. doi:https://doi.org/10.15121/1671635
Guglielmi, Yves. 1969. "EGS Collab Experiment 1: SIMFIP Notch-164 GRL Paper". United States. doi:https://doi.org/10.15121/1671635. https://www.osti.gov/servlets/purl/1671635. Pub date:Wed Dec 31 00:00:00 EST 1969
@article{osti_1671635,
title = {EGS Collab Experiment 1: SIMFIP Notch-164 GRL Paper},
author = {Guglielmi, Yves},
abstractNote = {Characterizing the stimulation mode of a fracture is critical to assess the hydraulic efficiency and the seismic risk related to deep fluid manipulations. We have monitored the three-dimensional displacements of a fluid-driven fracture during water injections in a borehole at ~1.5 km depth in the crystalline rock of the Sanford Underground Research Facility (USA). The fracture initiates at 61% of the minimum horizontal stress by micro-shearing of the borehole on a foliation plane. As the fluid pressure increases further, borehole axial and radial displacements increase with injection time highlighting the opening and sliding of a new hydrofracture growing ~10 m away from the borehole, in accordance with the ambient normal stress regime and in alignment with the microseismicity. Our study reveals how fluid-driven fracture stimulation can be facilitated by a mixed-mode process controlled by the complex hydromechanical evolution of the growing fracture. The data presented in this submission refer to the SIMFIP measurements and analyses of the stimulation tests conducted on the 164 ft (50 m) notch of the Sanford Underground Research Facility (SURF), during the EGS-Collab test 1. In addition to the datafiles, there is the draft of a manuscript submitted to Geophysical Research Letters (GRL).},
doi = {10.15121/1671635},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1969},
month = {12}
}