2019 October 30 9th GEOTREF PhD defense

The ninth GEOTREF PhD has been defended by Alexiane Favier, the 30th October 2019, in the Université des Antilles, pôle Guadeloupe In Pointe-à-Pitre: Evolution of hydrothermal fluids in the upper crust of the Lesser Antilles island arc in Guadeloupe: applications to the geothermal systems.

Abstract

This thesis, as part of the GEOTREF project (a multidisciplinary innovative platform for exploration and development of high-enthalpy GEOThermal energy in Fractured REservoirs), aims to improve the thermo-mechanical evolution of high-energy geothermal reservoirs. The geothermal potential of Lesser Antilles arc is known since the 1980s in the geothermal field of Bouillante in Guadeloupe. In order to develop this resource, it is necessary to identify possible new key targets, and to better understand the modes of fluids and heat transfers in high-enthalpy geothermal reservoirs.

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Subject 4 – Thesis & Post-Doctorate: Energy transfer modeling in dual-porosity Reservoir

Supervisor: P. Ackerer  (LHyGeS)
Research unit: CNRS – Laboratoire d’Hydrologie et Géochimie de Strasbourg (LHyGeS)
Starting date: Post-Doctorate – 2016, february the first
Candidate name: I. Toloni

Abstract

The objective is twofold:

  • Updating a pre-existing software tool, dedicated to mass transport simulation, within the context of the geothermal energy sector. The actual code is based on recent numerical methods (mixed and discontinuous finite elements) well suited to the modeling of highly heterogeneous matrices and complex geometry, as well as front propagation simulation.
  •  The development of an inverse method for the double-media model to facilitate well test interpretation. The multi-scale description of the parameter space differentiates this model from the existing models. This approach consists of initiating the inversion process with a homogeneous medium and gradually increasing the heterogeneity. Refinement indicators of the parameter space permit to automatically manage the increase in heterogeneity.