Methods of analysing stoneley waveforms and characterizing...

Details Methods of analysing stoneley waveforms and characterizing... Methods of analysing stoneley waveforms and characterizing...

G - Physics

01

V

G01V 1/50 (2006.01) G01V 1/48 (2006.01)

Patent

CA 2186997

A method of analyzing Stoneley waveforms obtained in a well logging operation, includes analyzing the waveforms by means of multiparameter inversion using one or more externally provided parameters to obtain borehole fluid slowness and borehole fluid attenuation, and analyzing the Stoneley waveforms by multiparameter inversion using the borehole fluid slowness and borehole fluid attenuation and the externally provided parameters so as to determine a parameter, such as mobility, related to permeability of the formation being logged. Complex conjugate back propagation using a maximum likelihood/least mean squares error estimator or by applying Prony's method and fitting model-derived dispersion curves can be used to obtain mobility

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