Articles | Volume 10, issue 4
https://doi.org/10.5194/se-10-1155-2019
https://doi.org/10.5194/se-10-1155-2019
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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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.