NMR log processing using wavelet filter and iterative inversion

摘要: A method of nuclear magnetic resonance (NMR) well log processing. wavelet decomposition an NMR echo train is preformed. The resulting small scale coefficients, which may be discretely or continuously indexed by scale, in alternative embodiments, are windowed, and a first reconstruction generated therefrom inverse transformation. reconstructed signal inverted fit to multiexponential model. Further refinements iteratively decomposing the fitted at preselected maximum increasing each iteration, generating new coefficient replacing corresponding portion previous with current reconstructing coefficient, fitting so relaxation time distribution.