Publications of the Grimsel ISC Project

The experiments within the Grimsel "In-Situ Stimulation and Circulation (ISC)" project were completed in 2017. Once the processing and interpretation is finished, all data acquired as well as journal and conference contributions, reports and datasets will be made public and appear below. If you have questions related to ISC publications or data, please either contact the respective first authors or the project leader Dr. Joseph Doetsch.

On the direct measurement of shear moduli in transversely isotropic rocks using the uniaxial compression test

Dambly, Marie Luise Texas; Nejati, Morteza; Vogler, Daniel; Saar, Martin O.

Permeability and seismic velocity anisotropy across a ductile-brittle fault zone in crystalline rock

Wenning, Quinn C.; Madonna, Claudio; de Haller, Antoine; Burg, Jean-Pierre

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.; Doetsch, Joseph; Dutler, Nathan; Valley, Benoit; Amann, Florian

Modified semi-circular bend test to determine the fracture toughness of anisotropic rocks

Nejati, Morteza; Aminzadeh, Ali; Saar, Martin O.; Driesner, Thomas

A methodology to determine the elastic properties of anisotropic rocks from a single uniaxial compression test

Nejati, Morteza; Dambly, Marie Luise Texas; Saar, Martin O.

On Brazilian disk test for mixed-mode I/II fracture toughness experiments of anisotropic rocks

Aminzadeh, Ali; Fahimifar, Ahmad; Nejati, Morteza

Transmissivity Changes and Microseismicity Induced by Small-Scale Hydraulic Fracturing Tests in Crystalline Rock

Jalali, Mohammadreza; Gischig, Valentin; Doetsch, Joseph; Näf, Rico; Krietsch, Hannes; Klepikova, Maria; Amann, Florian; Giardini, Domenico

Subsurface fluid pressure and rock deformation monitoring using seismic velocity observations

Doetsch, Joseph; Gischig, Valentin; Villiger, Linus; Krietsch, Hannes; Nejati, Morteza; Amann, Florian; Jalali, Mohammadreza; Madonna, Claudio; Maurer, Hansruedi; Wiemer, Stefan; Driesner, Thomas; Giardini, Domenico

The seismo-hydro-mechanical behaviour during deep geothermal reservoir stimulations: open question tackled in a decameter-scale in-situ stimulation experiment

Amann, Florian; Gischig, Valentin; Evans, Keith; Doetsch, Joseph; Jalali, Reza; Valley, Benoît; Krietsch, Hannes; Dutler, Nathan; Villiger, Linus; Brixel, Bernard; Klepikova, Maria; Kittilä, Anniina; Madonna, Claudio; Wiemer, Stefan; Saar, Martin O.; Loew, Simon; Driesner, Thomas; Maurer, Hansruedi; Giardini, Domenico

Comprehensive geological dataset describing a crystalline rock mass for hydraulic stimulation experiments

Krietsch, Hannes; Doetsch, Joseph; Dutler, Nathan; Jalali, Mohammadreza; Gischig, Valentin; Loew, Simon; Amann, Florian

On the link between stress field and small-scale hydraulic fracture growth in anisotropic rock derived from microseismicity

Gischig, Valentin; Doetsch, Joseph; Maurer, Hansruedi; Krietsch, Hannes; Amann, Florian; Evans, Keith Frederick; Nejati, Morteza; Jalali, Mohammadreza; Valley, Benoît; Obermann, Anne; Wiemer, Stefan; Giardini, Domenico

On the link between fracture toughness, tensile strength, and fracture process zone in anisotropic rocks

Dutler, Nathan; Nejati, Morteza; Valley, Benoît; Amann, Florian; Molinari, Giulio

Field Comparison of DNA‐Labeled Nanoparticle and Solute Tracer Transport in a Fractured Crystalline Rock

Kittilä, Anniina; Jalali, Mohammadreza; Evans, Keith F.; Willmann, Matthias; Saar, Martin O.; Kong, Xiang-Zhao

A multi-phasic approach for estimating the Biot coefficient for Grimsel granite

Selvadurai, Patrick; Selvadurai, Paul A.; Nejati, Morteza

On the anisotropy of mechanical properties in Grimsel granodiorite

Nejati, Morteza

GTS Phase VI ISC Project

Kontar, Karam; Rösli, Ursula

Stress measurements by overcoring at the Grimsel site. Results from the campaign of August-September 2015

Bouffier, Christian

Completion of borehole ISC-SB.15.001

Bühler, Christoph

Hydraulic-fracturing and HTPF - Tests in borehole nos. SB 15.001, SB 15.003 AND SB 15.004

Klee, Gerd

Grimsel ISC Experiment Description

Doetsch, Joseph; Gischig, Valentin; Krietsch, Hannes; Villiger, Linus; Amann, Florian; Dutler, Nathan; Jalali, Mohammadreza; Brixel, Bernard; Klepikova, Maria; Roques, Clément; Giertzuch, Peter-Lasse; Kittilä, Anniina; Hochreutener, Rebecca

Impact of the ISC Experiment at the Grimsel Test Site - Assessment of Potential Seismic Hazard and Disturbances to Nearby Experiments and KWO Infrastructure

Gischig, Valentin; Jalali, Mohammadreza; Amann, Florian; Krietsch, Hannes; Klepikova, Maria; Esposito, Simona; Broccardo, Marco; Obermann, Anne; Mignan, Arnaud; Doetsch, Joseph; Madonna, Claudio Gischig, Valentin; Amann, Florian

Research Data

Size: 14

Dataset for "Permeability and seismic velocity anisotropy across a ductile-brittle fault zone in crystalline rock"

Wenning, Quinn C.; Madonna, Claudio; de Haller, Antoine; Burg, Jean-Pierre

Data set from the Grimsel ISC hydraulic tomography experiments carried out between injection boreholes

Klepikova, Maria; Jalali, Mohammadreza; Brixel, Bernard

Single- and cross-hole hydraulic characterization of the ISC support volume at the Grimsel Test Site

Brixel, Bernard; Jalali, Mohammadreza; Klepikova, Maria V.

GPR 250MHz Borehole Dataset during Salt Tracer injection

Giertzuch, Peter-Lasse; Doetsch, Joseph; Jalali, Mohammadreza; Shakas, Alexis

Data set from solute dye tracer tests at the Grimsel Test Site

Kittilä, Anniina; Jalali, Mohammadreza; Evans, Keith Frederick; Saar, Martin O.

Hydro mechanical data set from the six Grimsel ISC hydraulic shearing experiments

Krietsch, Hannes; Gischig, Valentin; Doetsch, Joseph; Jalali, Mohammadreza; Amann, Florian

Comprehensive geological dataset for a fractured crystalline rock volume at the Grimsel Test Site

Krietsch, Hannes; Doetsch, Joseph; Dutler, Nathan; Jalali, Mohammadreza; Gischig, Valentin; Loew, Simon; Amann, Florian

Microseismicity observed during hydraulic stimulations at the Grimsel Test Site

Villiger, Linus; Gischig, Valentin; Doetsch, Joseph; Krietsch, Hannes; Jalali, Mohammadreza; Dutler, Nathan; Amann, Florian

Active seismic monitoring of a hydraulic injection at the Grimsel Test Site

Doetsch, Joseph; Gischig, Valentin; Villiger, Linus; Krietsch, Hannes; Jalali, Mohammadreza; Amann, Florian

Continuous monitoring of dissolved gases during hydraulic fracturing at the Grimsel Test Site

Roques, Clément; Weber, Ulrich W.; Kipfer, Rolf

Hydro mechanical data set from the six Grimsel ISC hydraulic fracturing experiments

Dutler, Nathan; Gischig, Valentin; Doetsch, Joseph; Jalali, Mohammadreza; Krietsch, Hannes; Amann, Florian

Data collection for the Grimsel In-Situ Stimulation and Circulation (ISC) experiment

Doetsch, Joseph; Gischig, Valentin; Amman, Florian; Jalali, Mohammadreza; Krietsch, Hannes; Giardini, Domenico

Hydraulic Characterization Data Collected Pre- and Post-hydraulic fracturing experiments for Stress Measurement at Grimsel Test Site

Jalali, Mohammadreza; Klepikova, Maria

Microseismicity observed during small-scale hydraulic fracturing experiments at the Grimsel Test Site

Gischig, Valentin; Doetsch, Joseph; Maurer, Hansruedi; Krietsch, Hannes; Amann, Florian; Evans, Keith Frederick; Jalali, Mohammadreza; Obermann, Anne

An in-situ stimulation experiment in crystalline rock - seismo-hydro-mechanical response during hydraulic fracturing tests

Doetsch, J.; Amann, F.; Gischig, V.; Jalali, M.; Madonna, C.; Evans, K.; Valley, B.; Giardini, D.; Wiemer, S.; Maurer, H. R.

An Interdisciplinary Decameter-scale Reservoir Stimulation Practice at the Grimsel Test Site

Jalali, M.R.; Doetsch, J.; Gischig, V.; Madonna, C.; Amann, F.

Overview of the hydraulic stimulation experiments at the Grimsel Test Site

Doetsch, Joseph; Amann, Florian; Gischig, Valentin; Jalali, Reza; Krietsch, Hannes; Villiger, Linus; Evans, Keith F.; Valley, Benoît; Dutler, Nathan; Brixel, Bernard; Klepikova, Maria; Kittilä, Anniina; Wiemer, Stefan; Saar, Martin O.; Loew, Simon; Driesner, Thomas; Maurer, Hansruedi; Giardini, Domenico

The use of novel DNA nanotracers to determine Groundwater flow paths - a test study at the Grimsel Deep Underground Geothermal (DUG) Laboratory in Switzerland

Kittilä, Anniina; Evans, Keith; Puddu, Michela; Mikutis, Gediminas; Grass, Robert N.; Deuber, Claudia; Saar, Martin O.

Geothermal reservoir characterization through active thermal testing

Jung, Martin; Klepikova, Maria; Jalali, Mohammadreza; Fisch, Hansruedi; Löw, Simon; Amann, Florian

Permeability Enhancement in Enhanced Geothermal System as a result of Hydraulic Fracturing and Jacking

Jalali, Mohammadreza; Klepikova, Maria; Fisch, Hansruedi; Amann, Florian; Löw, Simon

Salt tracer flow path reconstruction using ground penetrating radar

Giertzuch, Peter-Lasse; Doetsch, Joseph; Jalali, Mohammadreza; Shakas, Alexis; Krietsch, Hannes; Brixel, Bernard; Schmelzbach, Cédric; Maurer, Hansruedi

Petrophysical properties through a Grimsel granodiorite shear zone – Implications for geothermal reservoir evaluation and modeling

Wenning, Quinn C.; Madonna, Claudio; Moulas, Evangelos; Burg, Jean-Pierre

Fully Hydro-Mechanically Coupled Experiments and Simulations on Rough Fractures Subjected to High-Pressure Fluid Injection

Vogler, Daniel; Settgast, Randolph R.; Annavarapu, Chandrasekhar; Madonna, Claudio; Bayer, Peter; Amann, Florian

Mechanical, Hydraulic and Seismological Behaviour of Crystalline Rock as a Response to Hydraulic Fracturing at the Grimsel Test Site

Jalali, Reza; Gischig, V.; Doetsch, Joseph; Krietsch, Hannes; Amann, F.; Klepikova, Maria

Hydraulic Stimulation of Crystalline Rock – Grimsel Test Site

Jalali, Mohammadreza; Doetsch, Joseph; Gischig, Valentin; Krietsch, Hannes; Amann, Florian

Modeling Induced Seismic Hazard During Geothermal Reservoir Creation

Doetsch, Joseph

Fracture Transmissivity Development as a Response to Hydraulic Fracturing and Hydraulic Jacking at Grimsel Test Site

Loew, Simon; Jalali, Mohammadreza; Klepikova, Maria; Amann, Florian

A Numerical Study on the Hydro - Mechanical Behavior of Conductive Fractures in the Deep Underground Rock Laboratory at the Grimsel Test Site

Jalali, Mohammadreza

Observation of transient seismic velocity variations allow monitoring of field scale pressure changes during high-pressure fluid injection

Doetsch, Joseph; Gischig, Valentin; Villiger, Linus; Krietsch, Hannes; Amann, Florian; Jalali, Mohammadreza; Madonna, Claudio; Maurer, Hansruedi; Wiemer, Stefan; Giardini, Domenico

GPR imaging of shear zones in crystalline rock

Doetsch, Joseph; Krietsch, Hannes; Lajaunie, Myriam; Schmelzbach, Cedric; Maurer, Hansruedi; Amann, Florian

Tracer based characterization of the connected fracture volume in the DUG Lab at the Grimsel Test Site

Kittilä, Anniina; Evans, Keith; Jalali, Mohammadreza; Willmann, Matthias; Saar, Martin O.

DNA nanotracers characterization of stimulation enhanced pore in fractured rock

Kittilä, Anniina; Evans, Keith Frederick; Jalali, Mohammadreza; Willmann, Matthias; Saar, Martin O.

Determining Mode I fracture toughness in anisotropic rocks

Nejati, Morteza; Aminzadeh, Ali; Saar, Martin O.; Driesner, Thomas

High-Resolution Time-Lapse GPR Monitoring of Saline Tracer Flow in Fractured Rock

Giertzuch, Peter-Lasse; Doetsch, Joseph; Jalali, Mohammadreza; Shakas, Alexis; Schmelzbach, Cédric; Maurer, Hansruedi

The Grimsel in-situ stimulation project – on the seismo-hydromechanical response during hydraulic stimulation tests

Doetsch, Joseph; Amann, Florian; Gischig, Valentin; Jalali, Mohammadreza; Krietsch, Hannes; Villiger, Linus; Dutler, Nathan; Brixel, Bernard; Evans, Keith F.; Valley, Benoît; Wiemer, Stefan; Maurer, Hansruedi; Saar, Martin O.; Driesner, Thomas; Löw, Simon; Giardini, Domenico

On the seismo-hydromechanical response of a shear zone during hydraulic stimulation

Krietsch, Hannes; Villiger, Linus; Doetsch, Joseph; Gischig, Valentin; Jalali, Mohammadreza; Amann, Florian

Identification and Characterization of Natural and Stimulation Induced Flow Path between two Boreholes using Conductivity Logs

Dutler, Nathan; Brixel, Bernard; Jalali, Mohammadreza; Kittilä, Anniina; Amann, Florian; Valley, Benoît

Flow path characterization using DNA-based smart tracers in the Grimsel Deep Underground Geothermal Laboratory (DUG-Lab)

Kittilä, Anniina; Evans, Keith; Deuber, Claudia; Saar, Martin O.

The measurement of fracture toughness anisotropy in Grimsel Granodiorite using semi-circular samples

Dutler, Nathan; Nejati, Morteza; Amann, Florian; Valley, Benoît

Diagnostic pressure analysis from the in-situ decameter-scale HF experiment

Dutler, Nathan; Brixel, Bernard; Roques, Clément; Valley, Benoît; Jalali, Mohammadreza; Amann, Florian

Transient hydraulic tomography for characterizing hydraulic properties and connectivity of the major fractures

Klepikova, Maria; Jalali, Mohammadreza; Brixel, Bernard; Amann, Florian

Towards multi-observational full-waveform inversion

Paitz, Patrick; Sager, Korbinian; Schmelzbach, Cédric; Doetsch, Joseph; Chalari, Athena; Fichtner, Andreas

Modeling the Hydraulic Fracture Stimulation performed for Reservoir Permeability Enhancement at the Grimsel Test Site, Switzerland

Vogler, Daniel; Settgast, Randolph R.; Sherman, Christopher S.; Gischig, Valentin; Jalali, Reza; Doetsch, Joseph; Valley, Benoît; Evans, Keith F.; Amann, Florian; Saar, Martin O.

Modeling the Hydraulic Fracture Stimulation performed for Reservoir Permeability Enhancement at the Grimsel Test Site, Switzerland

Vogler, D.; Settgast, R.R.; Gischig, V.; Jalali, R.; Doetsch, J. A.; Valley, B.; Evans, K.F.; Sherman, C.; Amann, F.; Saar, M.O.

Preliminary stress characterization for an in-situ stimulation experiment at the Grimsel Underground Laboratory

Krietsch, Hannes; Doetsch, Joseph; Gischig, Valentin; Amann, Florian; Jalali, Mohammadreza; Madonna, Claudio; Evans, Keith; Valley, Benoît; Giardini, Domenico; Wiemer, Stefan; Maurer, Hansruedi; Löw, Simon

Pressure propagation during decameter-scale hydraulic stimulation experiments in crystalline rock at the Grimsel Test Site

Gischig, Valentin; Jalali, Mohammadreza; Doetsch, Joseph; Krietsch, Hannes; Villiger, Linus; Amann, Florian

Observations of Fracture Propagation During Decameter-Scale Hydraulic Fracturing Experiments

Dutler, Nathan; Valley, Benoît; Gischig, Valentin; Jalali, Mohammadreza; Doetsch, Joseph; Krietsch, Hannes; Villiger, Linus; Amann, Florian

Physical property characterization of a damage zone in granitic rock: Implications for geothermal reservoir properties

Wenning, Quinn; Madonna, Claudio; Amann, Florian; Gischig, Valentin; Burg, Jean-Pierre

Pico-seismicity during hydraulic stimulation experiments at the Grimsel Test Site

Villiger, Linus; Gischig, Valentin; Doetsch, Joseph; Krietsch, Hannes; Jalali, Mohammadreza; Dutler, Nathan; Valley, Benoît; Evans, Keith F.; Amann, Florian; Wiemer, Stefan Swiss Competence Center for Energy Research – Supply of Electricity (SCCER-SoE)

Induced micro-seismicity observed during meter-scale hydraulic-fracturing

Gischig, Valentin; Doetsch, Joseph; Krietsch, Hannes; Maurer, Hansruedi; Amann, Florian; Evans, Keith F.; Jalali, Mohammadreza; Obermann, Anne; Nejati, Morteza; Valley, Benoît; Wiemer, Stefan

On the variability of the seismic response during multiple decametre-scale hydraulic stimulations at the Grimsel Test Site

Villiger, Linus; Gischig, Valentin; Doetsch, Joseph; Krietsch, Hannes; Jalali, Mohammadreza; Dutler, Nathan; Valley, Benoît; Amann, Florian; Mignan, Arnaud; Wiemer, Stefan

On the variability of seismic response during multiple decameter-scale hydraulic stimulations in crystalline rock

Villiger, Linus; Gischig, Valentin; Doetsch, Joseph; Krietsch, Hannes; Dutler, Nathan; Selvadurai, Paul Antony; Jalali, Mohammadreza; Valley, Benoît; Amann, Florian; Wiemer, Stefan

Characterization of the in-situ stress field at Grimsel Test Site

Krietsch, Hannes; Dutler, Nathan; Gischig, Valentin; Valley, Benoît; Evans, Keith F.; Amann, Florian

A Multi-Scale Approach to Identify and Characterize Preferential Flow Paths in a Fractured Crystalline Rock

Jalali, Mohammadreza; Klepikova, Maria; Doetsch, Joseph; Krietsch, Hannes; Brixel, Bernard; Dutler, Nathan; Gischig, Valentin; Amann, Florian

Stress Characterisation and stress modeling at the Grimsel Test Site for the In-situ Stimulation and Circulation Project

Dutler, Nathan; Gischig, Valentin; Krietsch, Hannes; Amann, Florian; Valley, Benoît; Evans, Keith F.

Building a geological model for analysis and numerical modelling of hydraulic stimulation experiments

Krietsch, Hannes; Doetsch, Joseph; Gischig, Valentin; Jalali, Mohammadreza; Dutler, Nathan; Amann, Florian; Loew, Simon

The deformation field in a rock mass during an in-situ hydraulic stimulation experiment

Krietsch, Hannes; Gischig, Valentin; Doetsch, Joseph; Valley, Benoît; Amman, Florian

Subsurface Fluid Pressure and Rock Deformation Monitoring using Seismic Velocity Observations

Doetsch, Joseph; Gischig, Valentin; Villiger, Linus; Krietsch, Hannes; Nejati, Morteza; Amann, Florian; Jalali, Mohammadreza; Madonna, Claudio; Maurer, Hansruedi; Wiemer, Stefan; Driesner, Thomas; Giardini, Domenico

Characterizing fractures and shear zones in crystalline rock using seismic and GPR methods

Doetsch, Joseph; Jordi, Claudio; Laaksonlaita, Niko; Gischig, Valentin; Schmelzbach, Cedric; Maurer, Hansruedi

An in-situ stimulation experiment in crystalline rock – assessment of induced seismicity levels during stimulation and related hazard for nearby infrastructure

Gischig, Valentin; Broccardo, Marco; Amann, Florian; Jalali, Mohammadreza; Esposito, Simona; Krietsch, Hannes; Doetsch, Joseph; Madonna, Claudio; Wiemer, Stefan; Löw, Simon; Giardini, Domenico

A comparison of the seismo-hydro-mechanical observations during two hydraulic stimulations at the Grimsel Test Site.

Gischig, Valentin; Doetsch, Joseph; Jalali, Mohammadreza; Amann, Florian; Krietsch, Hannes; Villiger, Linus; Dutler, Nathan; Valley, Benoît Swiss Competence Center for Energy Research – Supply of Electricity (SCCER-SoE)

Induced micro-seismicity observed during meter-scale hydraulic-fracturing

Gischig, Valentin; Doetsch, Joseph; Villiger, Linus; Krietsch, Hannes; Maurer, Hansruedi; Amann, Florian; Jalali, Mohammadreza; Obermann, Anne; Wiemer, Stefan

A new methodology to determine the shear moduli in anisotropic rocks using a single uniaxial test

Dambly, Marie Luise Texas; Nejati, Morteza; Saar, Martin O.

Characterizing fractures and shear zones in crystalline rock using anisotropic seismic inversion and GPR imaging

Doetsch, Joseph; Krietsch, Hannes; Lajaunie, Myriam; Jordi, Claudio; Gischig, Valentin; Schmelzbach, Cédric; Maurer, Hansruedi

A Comparison of FBG- and Brillouin-Strain Sensing in the Framework of a Decameter-Scale Hydraulic Stimulation Experiment

Krietsch, Hannes; Gischig, Valentin; Jalali, Mohammadreza; Doetsch, Joseph; Valley, Benoît; Amann, Florian

Building a geological model for analysis and numerical modelling of hydraulic stimulation experiments

Krietsch, Hannes; Doetsch, Joseph; Gischig, Valentin; Jalali, Mohammadreza; Dutler, Nathan; Amann, Florian; Loew, Simon

Complex interplay between fracture opening and shearing during in-situ stimulation experiments

Krietsch, Hannes; Villiger, Linus; Doetsch, Joseph; Gischig, Valentin; Amann, Florian

Small-scale Reservoir Stimulation Experiments in the Deep Underground Laboratory at the Grimsel Test Site

Gischig, Valentin; Doetsch, Joseph; Jalali, Mohammadreza; Madonna, Claudio; Ammann, Florian

Stress measurements in crystalline rock: Comparison of overcoring, hydraulic fracturing and induced seismicity results

Krietsch, Hannes; Gischig, Valentin; Jalali, M. Reza; Amann, Florian; Evans, Keith F.; Doetsch, Joseph; Valley, Benoît

Injection Protocol and First Results of Hydraulic Fracturing Experiments at the Grimsel Test Site

Dutler, Nathan; Valley, Benoît; Villiger, Linus; Krietsch, Hannes; Jalali, Mohammadreza; Gischig, Valentin; Doetsch, Joseph; Amann, Florian

Reservoir Stimulation Experiments at the Grimsel Test Site: Stress Measurements using Hydraulic fracturing, Hydraulic Tests on Pre-existing Fractures and Overcoring

Doetsch, Joseph; Gischig, Valentin; Amann, Florian; Madonna, Claudio; Jalali, Mohammadreza; Valley, Benoît; Evans, Keith F.

Deformation and tilt measurements during the ISC experiment at the Grimsel Test Site

Krietsch, Hannes; Gischig, Valentin; Valley, Benoît; Amann, Florian SCCER-SoE

Permeability changes induced by hydraulic stimulation at the Grimsel test Site

Jalali, Mohammadreza; Gischig, Valentin; Doetsch, Joseph; Krietsch, Hannes; Villiger, Linus; Dutler, Nathan; Valley, Benoît; Evans, Keith F.; Amann, Florian

Preliminary results of six decameter scale hydraulic fracturing experiments (HF) at the Grimsel Test Site (GTS)

Dutler, Nathan; Valley, Benoît; Krietsch, Hannes; Villiger, Linus; Jalali, Mohammadreza; Gischig, Valentin; Doetsch, Joseph; Amann, Florian

Does a cyclic fracturing process agree with a fluid driven fracture solution?

Dutler, Nathan; Valley, Benoît; Gischig, Valentin; Villiger, Linus; Krietsch, Hannes; Doetsch, Joseph; Jalali, Mohammadreza; Amann, Florian

Fracture process zone in anisotropic rock

Dutler, Nathan; Nejati, Morteza; Valley, Benoît; Amann, Florian

Fracture growth and comparison to analytical solution for an in-situ hydraulic fracturing experiment

Dutler, Nathan; Valley, Benoît; Gischig, Valentin; Krietsch, Hannes; Villiger, Linus; Doetsch, Joseph; Jalali, Mohammadreza; Amann, Florian

Fracture growth and comparison to analytical solution for an in-situ hydraulic fracturing experiment

Dutler, Nathan; Valley, Benoît; Gischig, Valentin; Villiger, Linus; Krietsch, Hannes; Doetsch, Joseph; Jalali, Mohammadreza; Amann, Florian

A coupled fluid flow - seismicity model for real-time assessment of induced seismic hazard and reservoir creation

Gischig, Valentin; Doetsch, Joseph; Wiemer, Stefan

On the variability of the seismic response during multiple decameter-scale hydraulic stimulations

Villiger, Linus; Selvadurai, Paul A.; Gischig, Valentin; Doetsch, Joseph; Krietsch, Hannes; Dutler, Nathan; Jalali, Mohammadreza; Valley, Benoît; Amann, Florian; Wiemer, Stefan

A Multi-scale Approach toward understanding the Hydraulic Characteristics of the Stimulated Fractured Crystalline Rock

Jalali, Mohammadreza; Brixel, Bernard; Klepikova, Maria; Gischig, Valentin; Doetsch, Joseph; Amann, Florian

Detecting induced seismicity on various scales: Monitoring the Grimsel injections

Gischig, Valentin; Doetsch, Joseph; Kraft, Toni; Maurer, Hansruedi; Wiemer, Stefan

Results from combined characterization based on geological mapping and geophysics: Grimsel Test Site

Krietsch, Hannes; Doetsch, Joseph; Gischig, Valentin; Amann, Florian

Geophysical imaging and characterization of the DUG Lab at the Grimsel Test Site

Doetsch, Joseph; Gischig, Valentin; Maurer, Hansruedi

Insights into the hydromechanical rock mass responses during in-situ rock mass stimulations

Krietsch, Hannes; Gischig, Valentin; Doetsch, Joseph; Evans, Keith; Villiger, Linus; Jalali, Mohammadreza; Valley, Benoît; Loew, Simon; Amann, Florian

Injection Protocol and First Results of Hydraulic Fracturing Experiments at the Grimsel Test Site

Dutler, Nathan; Valley, Benoît; Villiger, Linus; Krietsch, Hannes; Jalali, Mohammadreza; Gischig, Valentin; Doetsch, Joseph; Amann, Florian SCCER-SoE

Mechanical response of a decameter-scale reservoir during an in-situ hydraulic stimulation experiment

Krietsch, Hannes; Gischig, Valentin; Doetsch, Joseph; Valley, Benoît; Amman, Florian

Characterizing rock anisotropy and nonlinearity using a single uniaxial compression test

Nejati, Morteza; Dambly, Marie Luise Texas; Saar, Martin O.

Energy-based approaches for the computation of fracture parameters in poroelastic media

Nejati, Morteza; Driesner, Thomas Stefanou, Ioannis; Sulem, Jean; Poulet, Thomas; Regenauer-Lieb, Klaus; Veveakis, Emmanuil

Micro-seismic monitoring during hydraulic-shearing experiments at the Grimsel underground laboratory

Villiger, Linus; Gischig, Valentin; Doetsch, Joseph; Dutler, Nathan; Krietsch, Hannes; Amann, Florian; Wiemer, Stefan

Noble Gas Release during Reservoir Stimulation

Roques, Clément; Weber, Ulrich W.; Krietsch, Hannes; Dutler, Nathan; Brixel, Bernard; Villiger, Linus; Doetsch, Joseph; Jalali, Mohammadreza; Gischig, Valentin; Klepikova, Maria; Amann, Florian; Valley, Benoît; Kipfer, Rolf

Evolution of Preferential Flow Paths during the In-situ Stimulation and Circulation (ISC) Experiment – Grimsel Test Site

Jalali, Mohammadreza; Roques, Clément; Leresche, Stéphane; Brixel, Bernard; Giertzuch, Peter-Lasse; Doetsch, Joseph; Schopper, Florian; Dutler, Nathan; Villiger, Linus; Krietsch, Hannes; Gischig, Valentin; Valley, Benoît; Amann, Florian

Monitoring salt tracer transport in granite rock using ground penetrating radar reflection imaging

Giertzuch, Peter-Lasse; Doetsch, Joseph; Kittilä, Anniina; Jalali, Reza; Schmelzbach, Cédric; Maurer, Hansruedi; Shakas, Alexis

Background

The Grimsel ISC project (Demo-1) has been performed between 2014 and 2017 at the Grimsel Test Site by an interdisciplinary team of ETH Zurich and the University of Neuchâtel.

The primary goal is to improve our understanding of geomechanical processes underpinning permeability creation during hydraulic stimulation and related induced seismicity as well as to evaluate the efficiency of the generated underground heat exchanger.

Two hydraulic injection phases were executed to enhance the permeability of the rock mass. They were monitored at a high spatial and temporal resolution, including the following characteristics: rock mass deformation across fractures and within intact rock, pore pressure distribution and propagation as well as micro-seismic response.

A review of scientific research that addresses seismo-hydro-mechanical coupled processes relevant for the development of a sustainable heat exchanger in low permeability crystalline rock and an introduction to the ISC experiments has been published by Amann et al., 2018.