GODINAUD, Jeremy; KLEPIKOVA, Maria; LARROQUE, Francois; GUIHÉNEUF, Nicolas; DUPUY, Alain; BOUR, Olivier

doi:10.1016/j.jhydrol.2023.129113

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GODINAUD, Jeremy
Environnements et Paléoenvironnements OCéaniques [EPOC]

KLEPIKOVA, Maria
Géosciences Rennes [GR]

LARROQUE, Francois
Environnements et Paléoenvironnements OCéaniques [EPOC]

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Article de revue

Ce document a été publié dans

Journal of Hydrology. 2023, vol. 617, n° Part C, p. 129113

Résumé en anglais

Fiber-Optic Active Distributed Temperature Sensing (FO-ADTS) experiments were performed on an Aquifer Thermal Energy Storage system (ATES) site located on the university campus of Bordeaux, France. The experiments consisted in heating the steel core of the FO cable while monitoring the rate of temperature increase during the heating periods. The changes in temperature, that were monitored through time at every depth under various hydraulic conditions and in different boreholes, were used to evaluate both aquifer properties and wells conditions. A first ADTS experiment was conducted under cross borehole configuration using a pumping well and a monitoring well separated by a distance of 8.5 meters. Then, to check the reciprocity of the results, a second experiment was conducted by switching the monitoring and the pumping well. The results obtained through the use of analytical solutions for reproducing and interpreting the data lead to the following conclusions: (i) ADTS can be used to estimate both thermal conductivity and Darcy velocity distribution along boreholes, crucial properties for ATES performance. (ii) The proposed method is a promising tool to detect clogging locations in the boreholes when it occurs. This can be of great practical interest to maintain systems performance, since, once FO cables deployed, experiments could be easily repeated without opening boreholes and stop the system operation.< Réduire

Mots clés en anglais

Distributed Temperature Sensing

Groundwater Flux

Thermal Conductivity

Clogging

ATES

URI

https://oskar-bordeaux.fr/handle/20.500.12278/188620

DOI

http://dx.doi.org/10.1016/j.jhydrol.2023.129113

Projet Européen

Transport of Heat in hEteRogeneous Media - Marie-Sklodowska Curie

Project ANR

Parc national d'équipements innovants pour l'étude spatiale et temporelle de la Zone Critique des Bassins Versants - ANR-11-EQPX-0011

Unités de recherche

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805