Signal processing of a multi-sub rotational resistivity logging tool

摘要

A method comprising determining a resistivity of a formation, based on a detection of angular electromagnetic signals by a receiver antenna on a first sub of a multi-sub resistivity tool during rotational operation in a wellbore within the formation, the angular electromagnetic signals emitted into the formation, prior to the detection, by a transmitter antenna on a second sub of the multi-sub resistivity tool, wherein the first sub and the second sub are separated apart such that the angular electromagnetic signals are to be transmitted deep into the formation, wherein determining the resistivity comprises curve-fitting and reproducing angular electromagnetic signals by the receiver antenna, and decoupling component signals based on fitting coefficients derived from the angular electromagnetic signals.