Patent ID: 9546547
Date: 2017-01-17
CPC Classifications: E21B,G01V

Claim:
1. A system comprising: a processor; a plurality of resonant tags, wherein each resonant tag further comprises: an interrogator configured to interrogate a channel associated with the oil well borehole between the interrogator and the plurality of resonant tags adhered to the borehole-facing wall using a frequency-modulated radio frequency (RF) signal such that the frequency-modulated RF signal covers an expected range of resonant frequencies for the plurality of resonant tags adhered to the borehole-facing wall within the channel, and wherein the processor is configured to characterize a dielectric constant for a medium in the channel using signal strengths of resonant reflections received by the interrogator from the plurality of resonant tags adhered to the borehole-facing wall within the channel.