Patent ID: 8299795

Claim:
A downhole induction resistivity assembly, comprising: a component configured to be conveyed into a well bore, the component being substantially cylindrical with a central axis and a length along the central axis, the component including: a transmitter, the transmitter being adapted to induce an induction field within a formation adjacent the wellbore, the transmitter including a plurality of transmitter units spaced around the component at a first radial distance from the central axis, the transmitter units being configured for independent excitation; a magnetic field generating mechanism located adjacent to the transmitter and configured to generate a magnetic field which guides the induction field into the formation, the magnetic field generating mechanism being configured for excitation independent from the excitation of the transmitter units; and a plurality of receivers spaced apart from each other and from the transmitter along the length of the component, the plurality of receivers being adapted to receive and measure a return induction signal representative of the formation, with at least one of the receivers comprising a plurality of receiver units spaced around the component at a second radial distance from the central axis.