Acoustics – Geophysical or subsurface exploration – Well logging
Patent
1983-07-06
1987-02-10
Jordan, Charles T.
Acoustics
Geophysical or subsurface exploration
Well logging
367 28, 73152, G01V 140, G01V 100, E21B 4900
Patent
active
046417249
ABSTRACT:
In the apparatus and method of the invention, acoustic energy is propagated in two slightly differing, or offset, circumferential paths in such a way as to interact with the formation under investigation. The propagating energy is detected and the resulting waveforms are compared using semblance. The waveforms corresponding to the respective paths will be quite similar provided that the length of the paths are equal and that there are no fractures or other similar anomalies between the source and receiver. The waveforms for the respective paths will be quite dissimilar, however, if a fracture or similar anomaly does lie between the source and receiver for the respective paths. The semblance may be displayed in log format.
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Chow Edward Y.
Kleinberg Robert L.
Borst Stephen L.
Carroll David H.
Coker David G.
Jordan Charles T.
Schlumberger Technology Corporation
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