Petrophysics covers physical processes at the pore- and fracture scale, from 1 µm to 10 cm. There is much cooperation between this theme and the unit Geo-Resources. Using the physics of porous and fractured media, we investigate the effects of porosity, saturation, permeability, fracture density and fracture connectivity on fluid flow, we study rock mechanics and rocks structure, and we study seismic, electromagnetic and coupled seismo-electromagnetic wave propagation, both with computer models and laboratory experiments. The acquired knowledge leads to improved geophysical characterization methodology for porous and fractured media, with applications in environmental and engineering geophysics, in exploration geophysics, as well as in reservoir engineering.