PROBE ASSEMBLY FOR PERFORMING ELECTROMAGNETIC FIELD MAPPING AROUND AN ANTENNA

摘要

A probe assembly for performing electromagnetic (EM) field mapping around an antenna, the probe assembly comprising a probe head base and three coils wrapped around the base and oriented in different directions. An EM field mapping apparatus to acquire multicomponent EM field measurements comprised of a non-metallic/non-magnetic frame, a set of linear motion actuators, a probe, a sensor, and a controller. An EM logging method that comprises constructing an EM logging tool having one or more antennas, mapping an EM field pattern for each of the one or more antennas, deriving an EM logging tool model, obtaining measurements using the EM logging tool, and inverting/transforming the measurements using the EM logging tool model to obtain the estimated formation.