Enhanced passive ranging methodology for well twinning

Details Enhanced passive ranging methodology for well twinning Enhanced passive ranging methodology for well twinning

E - Fixed Constructions

21

B

E21B 47/09 (2012.01) E21B 7/04 (2006.01) E21B 43/30 (2006.01) E21B 47/024 (2006.01)

Patent

CA 2727885

A method for magnetizing a wellbore tubular is disclosed. The method includes magnetizing a wellbore tubular at three or more discrete locations on the tubular. In exemplary embodiments the magnetized wellbore tubular includes at least one pair of opposing magnetic poles located between longitudinally opposed ends of the tubular. Wellbore tubulars magnetized in accordance with this invention may be coupled to one another to provide a magnetic profile about a section of a casing string. Passive ranging measurements of the magnetic field about the casing string may be utilized to survey and guide drilling of a twin well. Such an approach advantageously obviates the need for simultaneous access to both wells.

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