Determination of the polarity of remanent magnetization of a...

Details Determination of the polarity of remanent magnetization of a... Determination of the polarity of remanent magnetization of a...

G - Physics

01

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G01V 3/08 (2006.01) G01V 3/26 (2006.01)

Patent

CA 1039357

THE DETERMINATION OF THE POLARITY OF REMANENT MAGNETIZATION OF A SUB- SURFACE FORMATION ABSTRACT OF THE DISCLOSURE In accordance with the present invention, at least the polarity of the direction of the remanent magnetization of an earth formation penetrated by a bore hole is accurately measured utilizing a highly sensitive magnetometer, positioned within the bore hole so as to decrease sensitivity of the instrument to the induced magnetization of the adjacent earth formation while maintaining high resolution for detection of the natural remanent magnetization property of the formation. Preferred logging posture: the magnetometer is positioned such that its response direction is in a plane orthogonal to the earth's normal field in a given azimuthal direction. RELATED APPLICATION FILED SIMULTANEOUSLY HEREWITH S. H. Yungul, Serial No. 231,828, for "THE DETER- MINATION OF THE POLARITY OF REMANENT MAGNETIZATION OF A SUB- SURFACE FORMATION". -1-

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