Pseudo-3D Characterization of a Geothermal Field through Magneto Telluric

The use of Magneto Telluric (MT) data for geothermal resource assessment is widely documented in scientific literature. Full 3D inversions are however seldom performed since they are time consuming and provide, in most situations, smoothed models which are not suitable for accurate prospection of local anomalies. To overcome these limitations, an algorithm for the pseudo-3D interpretation of MT data based on a spatially constrained inversion is applied. An application to a real dataset is presented to show the potentialities of the selected approach. Data from an extensive MT survey carried out in the geothermal system of Travale (Tuscany, Italy) are presented. Geological constrains from a 3D seismic reflection survey, from geological data and from available stratigraphic logs were used as a-priori information for the inversion and for a correct tuning of the spatial constraints.