A well log that shows the propagation time and attenuation of a 1.1-GHz electromagnetic energy wave propagation through the [[formation]] near the borehole. The [[pad]]-type antenna assembly of the [[electromagnetic propagation tool]] contains two [[transmitter|transmitters]] and two [[receiver|receivers]] to minimize the effect of hole [[rugosity]] and tool tilt. Because the propagation time of water differs sharply from that of oil, gas, or rock, the electromagnetic propagation tool measurement provides a means to identify hydrocarbon zones regardless of the [[formation water]] salinity.