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Multi-scale analysis for azimuthal anisotropy of reservoir rocks from cross-dipole logs
We present an algorithm for the inversion of formation azimuthal anisotropy from cross-dipole logs employing a wavelet filter. The characteristics of principal flexural waves can be more clearly identified by wavelet transforms of four-component flexural waveforms and multi-scale analysis in the frequency–time domain. Wavelet coefficients of the desired wave components are then extracted by a scheme called time–frequency information mass extraction (TFIME). The flexural wave can be reconstructed to filter out major interferences. We also introduce a multi-objective function into the simulated annealing optimization to further reduce the ambiguity in determining formation anisotropy parameters. Field examples are presented to demonstrate the practical application of the method.
Multi-scale analysis for azimuthal anisotropy of reservoir rocks from cross-dipole logs
We present an algorithm for the inversion of formation azimuthal anisotropy from cross-dipole logs employing a wavelet filter. The characteristics of principal flexural waves can be more clearly identified by wavelet transforms of four-component flexural waveforms and multi-scale analysis in the frequency–time domain. Wavelet coefficients of the desired wave components are then extracted by a scheme called time–frequency information mass extraction (TFIME). The flexural wave can be reconstructed to filter out major interferences. We also introduce a multi-objective function into the simulated annealing optimization to further reduce the ambiguity in determining formation anisotropy parameters. Field examples are presented to demonstrate the practical application of the method.
Multi-scale analysis for azimuthal anisotropy of reservoir rocks from cross-dipole logs
Multi-scale analysis for azimuthal anisotropy of reservoir rocks from cross-dipole logs
Guo Tao (Autor:in) / Fengjiang He (Autor:in) / Bing Wang (Autor:in) / Weitao Sun (Autor:in)
Journal of Geophysics and Engineering ; 3 ; 135-142
01.06.2006
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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