| US 7,602,669 B2 | ||
| Tube-wave seismic imaging | ||
| Valeri A. Korneev, Lafayette, Calif. (US); and Andrey Bakulin, Houston, Tex. (US) | ||
| Assigned to The Regents of the University of California, Oakland, Calif. (US) | ||
| Filed on Oct. 30, 2007, as Appl. No. 11/978,573. | ||
| Prior Publication US 2008/0175100 A1, Jul. 24, 2008 | ||
| Int. Cl. G01V 1/42 (2006.01) | ||
| U.S. Cl. 367—31 [367/25; 367/57] | 10 Claims |
| 1. A method for seismic imaging using tube-waves, the method comprising the steps of:
a) transmitting an input tube-wave waveform down a transmitter borehole through a permeable fluid saturated layer of geological
mass within a geological field;
b) enhancing with a perforation in the transmitter borehole a coupling of the input tube-wave waveform in the transmitter
borehole at the permeable fluid saturated layer of geological mass within the geological field outside the transmitter borehole
as a converted signal tube-wave waveform that propagates within the permeable fluid saturated layer of geological mass as
a channel guided wave;
c) receiving the converted propagating signal tube-wave waveform that propagated through the permeable fluid saturated layer
of geological mass as a channel guided wave at a receiver borehole, and coupling the received converted propagating signal
tube-wave waveform into the receiver borehole as a received tube-wave waveform; and,
d) digitally processing the received tube-wave waveform to produce a seismic image of said permeable fluid saturated layer
of geological mass disposed between said transmitter and receiver boreholes,
wherein said receiving step and said coupling step for said received tube-wave waveform occurs after the arrival of an initial
P wave through said geological field in traditional seismic imaging.
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