Patent ID: 6934635

Claim:
A magnetic induction apparatus capable of inducing and recording all components of the magnetic induction tensor induced in an earth formation, comprising: (a) at least one triaxial transmitter array comprising at least three transmitter dipoles, three of the dipoles being mutually orthogonal, the three mutually orthogonal dipoles adapted to transmit a magnetic signal into the earth formation and thereby induce eddy currents in the earth formation; (b) at least one triaxial receiver array comprising at least three receiver dipoles, three of the dipoles being mutually orthogonal, the three mutually orthogonal receiver dipoles oriented so as to be direct-coupled to the mutually orthogonal transmitter dipoles; (c) at least one triaxial receiver array comprising at least three receiver dipoles, three of the dipoles being mutually orthogonal, the three mutually orthogonal receiver dipoles oriented so as to be cross-coupled to the mutually orthogonal transmitter dipoles; and (d) means for detecting and storing voltages induced in the receiver dipoles by the eddy currents.