Correction of cross-component induction measurements for misalignment using comparison of the XY formation response

摘要

A misalignment angle between the transmitter and receiver antenna of a multicomponent induction logging tool are estimated from quadrature component signals at multiple frequencies. A transmitter antenna having a first axial direction on a logging tool is excited at a plurality of frequencies. Signals responsive to the excitation are received at a receiver antenna having a second axial direction. A direct field between the transmitter antenna and the receiver antenna is obtained by performing multi-frequency focusing of the received signals. The misalignment angle is estimated from the direct field.