CHENILLE: Coupled Behavior Understanding of Faults: from the Laboratory to the Field
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Published:2023-03-17
Issue:
Volume:58
Page:177-188
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ISSN:1680-7359
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Container-title:Advances in Geosciences
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language:en
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Short-container-title:Adv. Geosci.
Author:
Bonnelye Audrey, Dick Pierre, Bohnhoff MarcoORCID, Cotton Fabrice, Giese Rüdiger, Henninges Jan, Jougnot DamienORCID, Kwiatek GrzegorzORCID, Lüth StefanORCID
Abstract
Abstract. The understanding of coupled thermo-hydro-mechanical
behaviour of fault zones or in naturally fractured reservoirs is essential
both for fundamental and applied sciences and in particular for the safety
assessment of radioactive waste disposal facilities. The overall objective
of the CHENILLE project is to better understand the physical processes
resulting from thermal and hydraulic loading in a small fault zone in a
highly consolidated shale formation. Consequently, a thermally controlled
in-situ fluid injection experiment is intended to be performed on a
strike-slip fault zone outcropping at the Tournemire/France Underground
Research Laboratory (URL). A heating system has been installed around the
injection area to enable a precise and controlled incremental increase of
the thermal load. Different monitoring systems are designed to measure the
seismic and aseismic deformation induced either by thermal and/or by
hydraulic loading. The seismic monitoring system is composed of Acoustic
Emission (AE) and broadband seismic sensors enabling monitoring of seismic
fracturing processes down to sub-decimetre scale as well as slow deformation
processes. Furthermore, we are about to install an injection chamber
allowing to perform a controlled gaz injection test. The injection borehole
will also be partly equipped with fiber optics in order to measure
temperature in a distributed manner in the borehole. Time-lapse active
seismic surveys are scheduled for before and after the experiment to image
the structural network but also to detect the appearance of new structures
triggered from the hydro-thermal pressurization of the fault as well as
eventual changes in the velocity field.
Publisher
Copernicus GmbH
Subject
General Chemical Engineering
Reference52 articles.
1. Amann, F., Gischig, V., Evans, K., Doetsch, J., Jalali, R., Valley, B., Krietsch, H., Dutler, N., Villiger, L., Brixel, B., Klepikova, M., Kittilä, A., Madonna, C., Wiemer, S., Saar, M. O., Loew, S., Driesner, T., Maurer, H., and Giardini, D.: The seismo-hydromechanical behavior during deep geothermal reservoir stimulations: open questions tackled in a decameter-scale in situ stimulation experiment, Solid Earth, 9, 115–137, https://doi.org/10.5194/se-9-115-2018, 2018. 2. Armand, G., Bumbieler, F., Conil, N., de la Vaissière, R., Bosgiraud,
J.-M., and Vu, M.-N.: Main outcomes from in situ thermo-hydro-mechanical
experiments programme to demonstrate feasibility of radioactive high-level
waste disposal in the Callovo-Oxfordian claystone, J. Rock Mech.
Geotech. Eng., 9, 415–427,
https://doi.org/10.1016/j.jrmge.2017.03.004, 2017. 3. Baisch, S.: Probing the Crust to 9-km Depth: Fluid-Injection Experiments and
Induced Seismicity at the KTB Superdeep Drilling Hole, Germany, B. Seismo. Soc. Am., 92, 2369–2380,
https://doi.org/10.1785/0120010236, 2002. 4. Ben-Zion, Y. and Sammis, C. G.: Characterization of Fault Zones, Pure, https://doi.org/10.1007/PL00012554, 2003. 5. Bernier, F. and Neerdael, B.: Overview of in-situ thermomechanical experiments in clay: Concept, results and interpretation, Eng. Geol., 41, 51–64, 1996.
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