Method for measuring acoustic impedance and dissipation of...

G - Physics – 01 – V

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349/4

G01V 1/40 (2006.01) G01V 1/44 (2006.01)

Patent

CA 1310101

ABSTRACT The invention is the use of standing waves to generate a well log. By measuring changes in energy dissipation from the standing wave along the well-bore, the formation may be evaluated for permeability variations. Variations in the tube wave velocity may be determined from variations in the frequency of a standing tube wave having a selected wave length. Shear wave velocity of the surrounding formation may be determined from the tube wave velocity.

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