Method of determining the permeability of a formation

Details Method of determining the permeability of a formation Method of determining the permeability of a formation

G - Physics

01

V

349/7

G01V 1/22 (2006.01) G01V 1/40 (2006.01) G01V 1/50 (2006.01)

Patent

CA 1216923

A METHOD OF DETERMINING THE PERMEABILITY OF A FORMATION ABSTRACT In a method for determining the permeability of a formation, a borehole is traversed with a logging tool 10 having a transmitter 24 for transmitting low frequency acoustic energy. The transmitter 24 is pulsed at a plurality of locations in the borehole and the produced acoustic energy is detected at spaced first and second receivers 28, 32, each having a low frequency response sufficient to detect tube waves in the acoustic energy. The arrival times of a tube wave at each of the spaced receivers 28, 32 are determined for each of a plurality of locations in the borehole so that values can be calculated representing the velocity of the tube wave for each of the plurality of locations. A record of said values is then formed for the plurality of locations corresponding to the traversal of the borehole by the logging tool 10.

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