Tracks from left to right of GGR3 well: porosity NPOR, Sonic, Density, Impedance logs, and synthetic seismograms in four increasingly wide frequency ranges, then inverted into impedance to visually appreciate the seismic resolution necessary to visually identify the efficient Porous Beds (PB) encountered by the GGR3 injector borehole. Figure reproduced from Figure 4.3 of Humphries [6].