1. n. [Formation Evaluation]

The combination of a deep-induction and a medium-induction array on the same sonde. In a typical implementation, the two arrays share the same transmitters but have different receivers. If the dual-induction log is combined with a shallow laterolog or microresistivity log, it is possible to correct for the effect on invasion on the deep log, assuming a step profile.

See: 6FF40,  deep induction,  induction,  medium induction,  receiver,  step profile