The well-log plot across the sandstone reservoir is shown below. This is a relatively low contrast in resistivity conventional reservoir. Note also the lack of cross over in the density neutron track. The pay interval is between the two blue horizontal lines in the plot. The new acoustic log-based saturation model was applied to the measured compressional and shear sonic log data to estimate water saturation (Swt). Swt estimate from the new saturation model is shown in the water saturation track along with core Swt. Note how well the model prediction matches with core data.