An electromagnetic logging apparatus and method

Details An electromagnetic logging apparatus and method An electromagnetic logging apparatus and method

G - Physics

01

V

G01V 3/30 (2006.01)

Patent

CA 2661565

An apparatus for investigating a geological formation GF surrounding a borehole WB, comprises a logging tool TL moveable through the borehole, an electromagnetic probe 1 comprising a pad 2 mounted on the logging tool, adapted for engagement with the borehole by a wall-engaging face of the pad, at least one transmitting antenna T X A, T X B mounted in the wall-engaging face, and a plurality of spaced receiving antennas R X A, R X B mounted in the wall-engaging face spaced in relation to the transmitting antenna T X A, T X B. At least one of the antennas R X A, R X B, T X A, T X B is an open-ended antenna forming a substantially pure electric dipole normal to the pad face.

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