Heat and fluid flows in the geothermal reservoir of Vieux-Habitants, Basse-Terre, Guadeloupe.

Margaux Raguenel and Francois Bonneau and Thomas Driesner. ( 2016 )
in: 2016 RING Meeting, ASGA

Abstract

This paper investigates the geothermal resources at Vieux-Habitants, in the Basse-Terre island, Guadeloupe, French Antilles. Early field observations have shown a particular variation of the temperature as a function of depth in the geothermal plant implanted in the area. To better exploit the resource, the relationships between the heat flux and the hydrogeologic system have to be clarified. Various scenarios involving heat sources, fluid flows and geological uncertainties can explain the observed temperatures and water chemistry. We simulate the temperature field on a 2D model of the geothermal field with the software HYDROTHERM. We conduct a sensitivity analysis by varying four parameters: (1) the permeability of the host rock (vertical and horizontal); (2) the topography of the area; (3) the precipitation flux and (4) the introduction of a geological heterogeneity as horizontal drain. The results of the simulations confirm the possibility of have a vertical heat flux corresponding to the temperature variations observed.

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BibTeX Reference

@INPROCEEDINGS{,
    author = { Raguenel, Margaux and Bonneau, Francois and Driesner, Thomas },
     title = { Heat and fluid flows in the geothermal reservoir of Vieux-Habitants, Basse-Terre, Guadeloupe. },
 booktitle = { 2016 RING Meeting },
      year = { 2016 },
 publisher = { ASGA },
  abstract = { This paper investigates the geothermal resources at Vieux-Habitants, in the Basse-Terre island,
Guadeloupe, French Antilles. Early field observations have shown a particular variation of the
temperature as a function of depth in the geothermal plant implanted in the area. To better
exploit the resource, the relationships between the heat flux and the hydrogeologic system have
to be clarified. Various scenarios involving heat sources, fluid flows and geological uncertainties
can explain the observed temperatures and water chemistry. We simulate the temperature field on
a 2D model of the geothermal field with the software HYDROTHERM. We conduct a sensitivity
analysis by varying four parameters: (1) the permeability of the host rock (vertical and horizontal);
(2) the topography of the area; (3) the precipitation flux and (4) the introduction of a geological
heterogeneity as horizontal drain. The results of the simulations confirm the possibility of have a
vertical heat flux corresponding to the temperature variations observed. }
}