Patent ID: 8836328
Filing Date: 2014-09-16
Classification: G01N,G01V

Abstract:
1. An apparatus configured to evaluate an earth formation, the apparatus comprising: a logging tool configured to be conveyed into a borehole; a first antenna on a first sensor assembly on the logging tool, the first antenna configured to be switched between a transmit mode and a receive mode, the first antenna configured to be switched between being tuned to a radio frequency signal and an acoustic frequency signal; at least one receiver amplifier on the first sensor assembly configured to produce a first output responsive to the radio frequency signal from the first antenna when in the receive mode and tuned to the radio frequency signal, the at least one receiver amplifier on the first sensor assembly configured to produce a second output responsive to the audio frequency signal from the first antenna when in the receive mode and tuned to the audio frequency signal; and at least one processor configured to estimate from the first and second outputs of the at least one receiver amplifier a property of the earth formation.