Correction for spurious phase via estimation of non-minimum phase wavelet

Deconvolution with minimum phase wavelet assumption usually leaves the
data with spurious phase. The phase correction required to remove the
spurious phase is done by a simple parameterization of the underlying mixed phase wavelet, which involves estimation of an all-pass operator coefficients via cumulant matching technique. The approach involves setting up a cost function with unknown shape and using a simulated annealing algorithm for optimization.

 

 

Correction for spurious phase_original   Correction for spurious phase_phase corrected

Original data

  Phase corrected data

 

Correction for spurious phase_original_p-vel   Correction for spurious phase_phase corrected_p-vel

Original data.

The inserted curve is the P-velocity log.

 

Phase corrected data.

The inserted curve is the P-velocity log.