Patent ID: 6624634
Filing Date: 2003-09-23
Classification: G01V

Abstract:
An apparatus for use in a borehole traversing a formation, comprising:an elongated support having a longitudinal axis; at least one antenna disposed on the support such that the magnetic dipole moment of the antenna is tilted or perpendicular with respect to the longitudinal axis of the support, each at least one antenna being adapted to transmit and/or receive electromagnetic energy; a first pair of electrodes disposed on the support and adapted for joint electromagnetic interaction; the first pair of electrodes being disposed such that the at least one antenna is located between the electrodes; a second pair of electrodes disposed on the support and adapted for joint electromagnetic interaction; and the second pair of electrodes being disposed such that the first electrode pair is located between the second electrode pair, wherein the EM interaction between either pair of electrodes is affected by the EM interaction of the other electrode pair.