Programme des sessions > Recherche par auteur > Vaudelet Pierre

The development of distributed acquisition systems for induced polarization geophysics enabled greater technical applicability of the methodology for deeper exploration targets. Coupled with a better understanding of electrical conductivities and polarization mechanisms, geophysicists can access petrophysical variables of great interest for geothermal and co-products exploration.

Thanks to the use of the dynamic Stern layer model, and measurements of representative fluid conductivities, geophysicists can now access several petrophysical parameters through vectorial identification of conductivity processes and application of petrophysical linear equation systems.

Porosity, clay content, and even temperature can be quantified through the use of induced polarization. More than lithological and structural identification and characterization, induced polarization methodologies can now assess alteration processes and reservoir properties, at kilometric depths of investigation.

This geophysical methodology combining large scale induced polarization equipment with petrophysical quantification of the geoelectrical signal has been applied to several geological targets, testing the widest applicability range for several industrial application (high enthalpy / low enthalpy geothermal energy, lithium exploration, hydrogen exploration, etc.). Two targets of the East African rift have been studied for different enthalpy exploration: the travertine hydrothermal chimneys of Lake Abhé and the travertine quarry of Mashyuza in Rwanda. The andesitic volcano of La Soufriere in Guadeloupe has been investigated for its high enthalpy geothermal potential. And finally, in the Grand-Est region (France), two targets have also been investigated, the granitic geothermal analogue of the Upper Rhine Graben in Sénones, and the basaltic volcano of Essey-la-côte (still in its processing stage for potential application for hydrogen exploration).