Nathan Dutler

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Dutler

First Name

Nathan

ORCID

0000-0003-0444-3143

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Publications 1 - 10 of 10

Corrigendum to “Hydraulic stimulation and fluid circulation experiments in underground laboratories: Stepping up the scale towards engineered geothermal systems” by Gischig et al. https://doi.org/10.1016/j.gete.2019.100175
Gischig, Valentin S.; Giardini, Domenico; Amann, Florian; et al. (2020)
Geomechanics for Energy and the Environment
On the Variability of Pressure Propagation During Hydraulic Stimulation Based on Seismic Velocity Observations
Schopper, Florian; Doetsch, Joseph; Villiger, Linus; et al. (2020)
Journal of Geophysical Research: Solid Earth
Characterization of the in-situ stress field at Grimsel Test Site
Krietsch, Hannes; Dutler, Nathan; Gischig, Valentin; et al. (2016)
SCCER-SoE Science Report 2016
Stress Characterisation and stress modeling at the Grimsel Test Site for the In-situ Stimulation and Circulation Project
Dutler, Nathan; Gischig, Valentin; Krietsch, Hannes; et al. (2016)
Abstract Volume 14th Swiss Geoscience Meeting
Hydraulic Characterization of the Bedretto Underground Laboratory
Gholizadeh Doonechaly, Nima; Dutler, Nathan; Brixel, Bernard; et al. (2019)
SCCER-SoE Science Report 2019
On the link between fracture toughness, tensile strength, and fracture process zone in anisotropic rocks
Dutler, Nathan; Nejati, Morteza; Valley, Benoît; et al. (2018)
Engineering Fracture Mechanics
Hydraulic stimulation and fluid circulation experiments in underground laboratories: Stepping up the scale towards engineered geothermal systems
Gischig, Valentin S.; Giardini, Domenico; Amann, Florian; et al. (2020)
Geomechanics for Energy and the Environment
Fracture process zone in anisotropic rock
Dutler, Nathan; Nejati, Morteza; Valley, Benoît; et al. (2018)
SCCER-SoE Science Report
Stress Measurements for an In Situ Stimulation Experiment in Crystalline Rock: Integration of Induced Seismicity, Stress Relief and Hydraulic Methods
Krietsch, Hannes; Gischig, Valentin; Evans, Keith F.; et al. (2019)
Rock Mechanics and Rock Engineering
An extensive campaign to characterize rock stresses on the decameter scale was carried out in three 18–24 m long boreholes drilled from a tunnel in foliated granite at the Grimsel Test Site, Switzerland. The survey combined stress relief methods with hydrofracturing (HF) tests and concomitant monitoring of induced seismicity. Hydrofracture traces at the borehole wall were visualized with impression packer tests. The microseismic clouds indicate sub-vertical south-dipping HFs. Initial inversion of the overcoring strains with an isotropic rock model yielded stress tensors that disagreed with the HF and microseismic results. The discrepancy was eliminated using a transversely isotropic rock model, parametrized by a novel method that used numerical modelling of the in situ biaxial cell data to determine the requisite five independent elastic parameters. The results show that stress is reasonably uniform in the rock volume that lies to the south of a shear zone that cuts the NNW of the study volume. Stress in this volume is considered to be unperturbed by structures, and has principal stress magnitudes of 13.1–14.4 MPa for σ1, 9.2–10.2 MPa for σ2, and 8.6–9.7 MPa for σ3 with σ1 plunging to the east at 30–40°. To the NNW of the uniform stress regime, the minimum principal stress declines and the principal axes rotate as the shear zone is approached. The stress perturbation is clearly associated with the shear zone, and may reflect the presence of more fragmented rock acting as a compliant inclusion, or remnant stresses arising from slip on the shear zone in the past.
Pico-seismicity during hydraulic stimulation experiments at the Grimsel Test Site
Villiger, Linus; Gischig, Valentin; Doetsch, Joseph; et al. (2017)
SCCER-SoE Science Report 2017

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Nathan Dutler

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