Borehole logging method for determining the damping of...

Details Borehole logging method for determining the damping of... Borehole logging method for determining the damping of...

G - Physics

01

V

349/7

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

Patent

CA 1279922

BOREHOLE LOGGING METHOD FOR DETERMINING THE DAMPING OF ACOUSTIC TUBE WAVES IN SUBSURFACE FORMATIONS ALONG A BOREHOLE WALL ABSTRACT A borehole logging method for determining the damping of acoustic tube waves in subsurface formations along a borehole wall employs an acoustic transmitter and at least one spaced-apart receiver. The transmitter is excited with a tone burst to cause the transmitter to resonate and generate acoustic tube waves. The rate of decay of the amplitudes of the tube waves recorded at the receiver following termination of the excitation of the transmitter is then used to determine the amount of damping of the tube waves in the subsurface formation along the borehole wall.

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