Geothermal plant monitoring using innovative Distributed Fibre Optic Sensing technologies

Summary Distributed Fibre optic Sensing is an innovative technology enabling to turn a fibre optic cable into hundreds to thousands of sensors. This solution can be adapted for temperature, strain or acoustic sensing using a same optical fibre. It then appears as a powerful leverage for the monitoring of Enhanced Geothermal Systems during geothermal production. In the framework of the European funded project MEET, FEBUS OPTICS has been mandated for deployment and exploitation of a fibre optic cable in an observation well located in the geothermal plant of Soultz-sous-Forets. Distributed Temperature Sensing, Distributed Strain and Temperature Sensing and Distributed Acoustic Sensing monitoring have been achieved at various moments after the fibre optic cable descent. We observe and discuss here the results of those acquisition campaigns.