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.

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

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

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

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

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 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.

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

Subsurface fluid pressure and rock deformation monitoring using seismic velocity observations

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

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

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

On the anisotropy of mechanical properties in Grimsel granodiorite

Nejati, Morteza

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

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

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

Research Data

Size: 11

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

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

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

Doetsch, Joseph; Gischig, Valentin S.; Villiger, Linus; Krietsch, Hannes; Jalali, Mohammadreza; 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

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

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

Tracer test data collected using solute dye tracers and DNA nanotracers at the Grimsel Test Site

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

Microseismicity observed during hydraulic stimulations at the Grimsel Test Site

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

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

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

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

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

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

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

Doetsch, Joseph; Gischig, Valentin; Maurer, Hansruedi

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, Benoit

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

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

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

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

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

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

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

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

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

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.

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

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

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

Detecting induced seismicity on various scales: Monitoring the Grimsel injections

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

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

Jalali, Mohammadreza

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

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

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

Geothermal reservoir characterization through active thermal testing

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

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

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, Benoit; Evans, Keith F.

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

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

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

Gischig, Valentin; Doetsch, Joseph; Wiemer, Stefan

GPR imaging of shear zones in crystalline rock

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

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.

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

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

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

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

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

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

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.

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

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

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

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

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

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 S.; Jalali, Reza; Doetsch, Joseph; Valley, Benoît; Evans, Keith F.; Amann, Florian; Saar, Martin O.

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

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

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

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

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

Hydraulic Stimulation of Crystalline Rock – Grimsel Test Site

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

DNA nanotracers characterization of stimulation enhanced pore in fractured rock

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

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.

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, Benoit; 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

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

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

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

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

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

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

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

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

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

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

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; Valley, Benoît; Wiemer, Stefan; Maurer, Hansruedi; Saar, Martin; Driesner, Thomas; Löw, Simon; Giardini, Domenico

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 Frederick; Amann, Florian; Loew, Simon

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; Dutler, Nathan; Jalali, Mohammadreza; Valley, Benoît; Amann, Florian; Wiemer, Stefan

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

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

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

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

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 Frederick; 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.