Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1995-10-03
1997-11-11
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
7315205, 367 25, G01V 140
Patent
active
056871384
ABSTRACT:
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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Kimball Christopher V.
Lewicki Pawel
Hyden Martin D.
Jeffery Brigitte L.
Lobo Ian J.
Schlumberger Technology Corporation
Smith Keith G. W.
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