EGS Collab Experiment 1: SIMFIP Notch-164 GRL Paper

Description

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).

Resources

Name Format Description Link
47 SIMFIP flow rate measurements of water injections during stimulation step 1 at the SURF 164m notch. https://gdr.openei.org/files/1250/SIGMAV_Notch164Pumpstep1.txt
33 Draft of paper submitted to GRL: In Situ Continuous Monitoring of Borehole Displacements Induced by Stimulated Hydrofracture Growth. https://gdr.openei.org/files/1250/GRL_YGuglielmi_Manuscript_with_figures.pdf
47 SIMFIP flow rate measurements of water injections during stimulation step 2 at the SURF 164m notch. https://gdr.openei.org/files/1250/SIGMAV_Notch164Pumpstep2.txt
47 SIMFIP measurements for 3D displacements of fluid-driven fracture due to water injections during stimulation step 3 at the SURF 164m notch. https://gdr.openei.org/files/1250/SIGMAV_Notch164Pumpstep3r.txt
33 Supporting information to the submitted GRL paper. Contains: details of the SIMFIP instrument, photo of the SIMFIP probe deployed at the SURF experiment, details about the numerical approach, and hydromechanical model parameters. https://gdr.openei.org/files/1250/Guglielmi_Supporting_information.pdf
8 Localized induced seismic events during stimulation step 2, taken from: Oak Ridge National Laboratory. (2020). EGS Collab Experiment 1: 3D Seismic Velocity Model and Updated Microseismic Catalog Using Transfer-Learning Aided Double-Difference Tomography [data set]. Retrieved from https://dx.doi.org/10.15121/1632061. https://gdr.openei.org/files/1250/updated_event_locations_DL_ORNL_2020-03-31.csv
47 SIMFIP flow rate measurements of water injections during stimulation step 3 at the SURF 164m notch. https://gdr.openei.org/files/1250/SIGMAV_Notch164Pumpstep3.txt
47 SIMFIP measurements for 3D displacements of fluid-driven fracture due to water injections during stimulation step 1 at the SURF 164m notch. https://gdr.openei.org/files/1250/SIGMAV_Notch164Pumpstep1r.txt
47 SIMFIP measurements for 3D displacements of fluid-driven fracture due to water injections during stimulation step 2 at the SURF 164m notch. https://gdr.openei.org/files/1250/SIGMAV_Notch164Pumpstep2r.txt

Tags

  • hydraulic-conductivity
  • shear-displacement
  • geophysics
  • experiment
  • nucleate
  • egs
  • surf
  • egs-collab
  • simfip
  • injection-test
  • wellbore
  • borehole
  • seismicity
  • sanford-underground-research-facility
  • hydrofracture
  • displacement
  • fracture
  • shear
  • stimulation
  • seismic
  • hydraulic
  • micro-shearing
  • anisotropy
  • stress
  • foliation
  • flow-rate
  • new-borehole-instrument
  • geothermal
  • energy

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