Towards a multi-physics multi-scale approach of deep geothermal exploration
Résumé
A wide range of geophysical methods is used for the exploration of deep geothermal resources. It aims
at characterizing the deep fractured network and its capacity for fluid/heat extraction. This relies
however on the capacity of geophysical techniques to 1) image the geometry of the fractured network
but also 2) characterize the petro-physical properties of the fracture network and matrix. The challenge
is however that the geophysical inverse problem is ill-posed and multi-scale.
To overcome these challenges, we propose here to take a multi-physics and multi-scale approach of the
geophysical/petro-physical inverse problem. To do so, we are developing iteratively petro-physical and
geophysical models that can explain the observables at the different scales. In this paper, we report out
the results of the first iteration phase of this research project that consists in building an initial petrophysical model from well logs and prior geological knowledge, and single-domain inversion of
geophysical data. We applied this methodology to the Upper Rhine Graben where a wealth of
knowledge and dataset on deep fractured formations are available.
Domaines
Géophysique [physics.geo-ph]Origine | Fichiers produits par l'(les) auteur(s) |
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