Articles | Volume 10, issue 4
Research article
22 Jul 2019
Research article |  | 22 Jul 2019

Stress characterization and temporal evolution of borehole failure at the Rittershoffen geothermal project

Jérôme Azzola, Benoît Valley, Jean Schmittbuhl, and Albert Genter

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Subject area: The evolving Earth surface | Editorial team: Rock deformation, geomorphology, morphotectonics, and paleoseismology | Discipline: Mineral and rock physics
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Cited articles

Aichholzer, C., Duringer, P., Orciani, S., and Genter, A.: New stratigraphic interpretation of the Soultz-sous-Forêts 30-year-old geothermal wells calibrated on the recent one from Rittershoffen (Upper Rhine Graben, France), Geothermal Energy, 4, 13,, 2016. 
Anderson, E. M.: The dynamics of faulting, Transactions of the Edinburgh Geological Society, 8, 387–402,, 1951. 
Barton, C. A. and Shen, B.: Extension Strain and Rock Strength Limits for Deep Tunnels, Cliffs, Mountain Walls and the Highest Mountains, Rock Mech. Rock Eng., 51, 3945–3962,, 2018. 
Barton, C. A., Zoback, M. D., and Burns, K. L.: In-situ stress orientation and magnitude at the Fenton Geothermal Site, New Mexico, determined from wellbore breakouts, Geophys. Res. Lett., 15, 467–470,, 1988. 
Baujard, C., Genter, A., Graff, J. J., Maurer, V., and Dalmais, E.: ECOGI, a new deep EGS project in Alsace, Rhine Graben, France, in: World geothermal Congress, Melbourne, Australia, 2015. 
Short summary
In projects based on enhanced geothermal system (EGS) technology, knowledge of the in situ stress state is of central importance to predict the response of the rock mass to different stimulation programs. We propose a characterization of the in situ stress state from the analysis of ultrasonic borehole imager (UBI) data acquired at different key moments of the reservoir. We discuss a significant stress rotation at depth and the absence of a significant change in the stress magnitude.