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We gme P08: Fiber-optic temperature profiles analysis for closed-loop geothermal systems-a case study
Radioti, Georgia; Delvoie, Simon; Sartor, Kevin et al.
2015In Second EAGE Workshop on Geomechanics and Energy: The ground as energy source and storage
 

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Keywords :
high-resolution temperature measurements; heterogeneous bedrock; numerical modelling
Abstract :
[en] In order to study the behaviour of shallow closed-loop geothermal systems four borehole heat exchangers equipped with fiber optics were installed on the campus of the University of Liege (Liege, Belgium) over a surface area of 32m². This paper presents the analysis of continuous, high-resolution temperature profiles measured along the boreholes length. The undisturbed ground temperature measurements indicate heat loss from ground structures located close to the boreholes. A 3D numerical model is presented to reproduce the measured temperature profiles. Temperature profiles during hardening of the grouting material indicate extended fractured zones in the rock mass. Temperature measurements during the recovery phase of a Distributed Thermal Response Test indicate the succession of rock layers with different mineral content. The results are in good agreement with those of the borehole televiewer logging method. The presented analysis could provide information on bedrock heterogeneity, on the anisotropic thermal behaviour of the rock mass and on the ground temperature variations due to heat loss from ground structures. These information could significantly contribute to the long-term behaviour prediction of the geothermal system and the geothermal reservoir potential.
Disciplines :
Geological, petroleum & mining engineering
Energy
Author, co-author :
Radioti, Georgia ;  Université de Liège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Delvoie, Simon ;  Université de Liège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Sartor, Kevin ;  Université de Liège > Département d'aérospatiale et mécanique > Systèmes de conversion d'énergie pour un dévelop.durable
Nguyen, Frédéric ;  Université de Liège > Département ArGEnCo > Géophysique appliquée
Charlier, Robert ;  Université de Liège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Language :
English
Title :
We gme P08: Fiber-optic temperature profiles analysis for closed-loop geothermal systems-a case study
Publication date :
October 2015
Event name :
Second EAGE Workshop on Geomechanics and Energy: The ground as energy source and storage
Event place :
Celle, Germany
Event date :
13-15 October 2015
Main work title :
Second EAGE Workshop on Geomechanics and Energy: The ground as energy source and storage
ISBN/EAN :
978-94-6282-161-3
Available on ORBi :
since 20 October 2015

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