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 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 Christine; 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

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

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; Burg, Jean-Pierre

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

Bouffier, Christian

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

Klee, Gerd

GTS Phase VI ISC Project

Kontar, Karam; Rösli, Ursula

Completion of borehole ISC-SB.15.001

Bühler, Christoph

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

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

Doetsch, Joseph; Gischig, Valentin Samuel; Villiger, Linus; Krietsch, Hannes; 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

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

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 Christine

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

Jalali, Mohammadreza; Klepikova, Maria

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

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

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

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

Jalali, Mohammadreza

Detecting induced seismicity on various scales: Monitoring the Grimsel injections

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

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

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

DNA nanotracers characterization of stimulation enhanced pore in fractured rock

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

In-situ Stimulation and Circulation Experiment at the Grimsel Test Site

Jalali, Mohammadreza; Amann, Florian; Gischig, Valentin; Doetsch, Joseph; Evans, Keith Frederick; Valley, Benoît; Krietsch, Hannes; Villiger, Linus; Dutler, Nathan; Klepikova, Maria; Brixel, Bernard; Kittilä, Anniina

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

Stress characterization and stress modelling 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 Frederick

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

Kittilä, Anniina; Evans, Keith Frederick; Jalali, Mohammadreza; Willmann, Matthias; 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

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

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

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

In-situ Stimulation and Circulation Experiment at the Grimsel Test Site

Jalali, Mohammadreza; Amann, Florian; Gischig, Valentin; Doetsch, Joseph; Evans, Keith Frederick; Valley, Benoît; Krietsch, Hannes; Villiger, Linus; Dutler, Nathan; Klepikova, Maria; Brixel, Bernard; Kittilä, Anniina

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

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

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.

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

Gischig, Valentin; Doetsch, Joseph; 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

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.

GPR imaging of shear zones in crystalline rock

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

Modeling Induced Seismic Hazard During Geothermal Reservoir Creation

Doetsch, Joseph

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

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

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

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

Krietsch, Hannes; Gischig, Valentin; Valley, Benoît; Amann, Florian

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.

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.

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

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

Hydraulic Stimulation of Crystalline Rock – Grimsel Test Site

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

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

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

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

In-situ Stimulation and Circulation Experiment - Overview on Phase

Amann, Florian; Gischig, Valentin; Jalali, Mohammadreza; Doetsch, Joseph; Madonna, Claudio; Krietsch, Hannes; Evans, Keith Frederick; Valley, Benoît; Klepikova, Maria

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

Doetsch, Joseph; Gischig, Valentin; Maurer, Hansruedi

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

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

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 Christine; Nejati, Morteza; Valley, Benoît; Wiemer, Stefan

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.

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

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.

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

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

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

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.