Method for logging behind casing

Details Method for logging behind casing Method for logging behind casing

G - Physics

01

V

G01V 1/44 (2006.01) E21B 47/14 (2006.01) G01V 1/50 (2006.01)

Patent

CA 2208965

A method for logging a subterranean formation from within a well that has been cased and cemented is disclosed. An acoustic signal is transmitted into the formation from a pulse-echo transducer placed within the wellbore and the first casing echo and the first formation echo are detected. The amplitude and the arrival times of these two echoes, combined with some known information about the wellbore, the casing, and the cement enable several parameters to be calculated. These parameters in turn may be used to image the formation around the well.

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