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This module is deprecated. For current workflows, use the Cepstrum Deconvolution or other deconvolution modules.
Spike Decon applies spiking (whitening) deconvolution to seismic traces using a least-squares inverse filter approach. The algorithm designs an operator that converts the actual seismic wavelet towards a spike (or a minimum-phase wavelet), broadening the frequency bandwidth and compressing the wavelet. Optionally, the deconvolution can be applied in a mixed-phase mode using a lag window to address non-minimum-phase wavelets. The filter can also be applied in a multi-trace mixing mode to improve stability.
The seismic data container connecting to the dataset to be deconvolved.
The input seismic gather on which spiking deconvolution will be applied.
When enabled, the deconvolution uses a non-zero lag window to handle mixed-phase or non-minimum-phase wavelets. When disabled, the Lag window is forced to zero and the filter assumes a minimum-phase wavelet. Default: disabled (minimum-phase mode).
The length of the deconvolution inverse filter operator in seconds. Longer operators are more effective at removing long-period reverberations and multiples, but may over-whiten the spectrum or become numerically unstable. A typical value is 0.1–0.3 s. Default: 0.2 s.
The lag time (in seconds) that shifts the peak of the output wavelet away from zero time, used in mixed-phase deconvolution mode. A non-zero lag allows the filter to accommodate acausal or non-minimum-phase wavelets. This parameter is ignored when Mix phase decon is disabled. Default: 0 s.
The number of traces to mix together when estimating the autocorrelation for filter design. Mixing multiple traces reduces the effect of random noise on the operator estimate. Use a value greater than 1 in noisy datasets. Default: 1 (single-trace deconvolution).
The start time (in seconds) of the design window used to estimate the autocorrelation for the deconvolution filter. Set this just below the first reflector of interest or the seafloor reflection. Default: 0 s.
The end time (in seconds) of the design window. The autocorrelation is computed from the trace data between Time start and Time end. This window should be representative of the section to be deconvolved. Default: 5 s.
A pre-whitening fraction added to the zero-lag autocorrelation value to stabilize the deconvolution filter inversion. A value of 0.001 corresponds to 0.1% pre-whitening. Increase this value if you observe numerical artefacts or excessive spectral boosting of high frequencies. Default: 0.001.