Propagation resistivity

{
  "id": "MLC-T-OAG-002974",
  "term": "Propagation resistivity",
  "field": "Oil and gas",
  "definition": "A resistivity derived from the attenuation and the phase shift of a high-frequency electromagnetic wave, usually near 2 MHz, as it travels between a transmitter and two receivers. It is the standard logging-while-drilling resistivity measurement, and the phase-shift reading looks shallower than the attenuation reading. Wireline induction tools differ in that they work at tens of kilohertz and sense the in-phase conductivity signal, not wave propagation.",
  "subject": "Formation Evaluation",
  "url": "https://mlchart.com/terminology/oil-and-gas/propagation-resistivity/"
}