Vibroseis Deconvolution with Maximum Likelihood Approach

The most commonly used deconvolution (Decon) method is based on minimum-phase assumption for the wavelet which is often not valid. Explosive energy source is close to minimum-phase which makes seismic data with explosive somewhat amenable to predictive Decon though the result is imperfect in phase. Decon of Vibroseis data is more problematic because the wavelet in a correlated Vibroseis trace is mixed-phase in nature. In the commonly used method for Vibroseis Decon, the Klauder wavelet is replaced with its minimum-phase equivalent which is a difficult proposition for band limited Vibroseis sweep. As an alternative, we have used Maximum Likelihood Deconvolution (MLD) for Vibroseis data because it has no restrictive assumption for the phase of the wavelet.