Methods and systems for acoustic waveform processing

Details Methods and systems for acoustic waveform processing Methods and systems for acoustic waveform processing

G - Physics

01

V

G01V 1/28 (2006.01) G01V 1/30 (2006.01) G01V 1/34 (2006.01) G01V 1/48 (2006.01) G01V 1/50 (2006.01)

Patent

CA 2527808

A technique for processing acoustic waveforms includes: (a) transforming at least a portion of the acoustic waveforms to produce frequency-domain signals; (b) obtaining a model dispersion curve based on a borehole-formation model having a set of borehole- formation parameters; (c) adjusting phases of the frequency-domain signals according to the model dispersion curve to produce back-propagated signals; (d) computing coherence of the back-propagated signals; (e) repeating steps (b) - (d) by varying values of the set of borehole-formation parameters until the coherence reaches a selected criterion; and (f) outputting at least a portion of the set of borehole-formation parameters.

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