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  Techco Dcon  

SDCON is a surface consistent deconvolution algorithm which was originally described by Dave Hutchinson and Brian Link in a paper at the 1984 SEG convention. The process has been developed considerably and generalized to run on 3D data. It is able to optionally solve and apply multiple components including line, shot, receiver, cdp, and offset. It also has the ability to solve and apply a channel component for marine applications.

Data can be input in any sort order, and for large datasets, the collection of spectral information and the application of the calculated operators can be broken into multiple job streams to make better use of time or resources.

True simultaneous median fitting is used to derive unique spectra for each individual component in a seismic data set. An error term is derived for each component which can be viewed using the TechcoView data viewer, and used as a QC to identify areas of potential problems in the deconvolution due to poor data quality, noise contamination, etc. Deconvolution operators are derived from the component spectra and applied to each seismic trace. These operators can be calculated using minimum phase, predictive, or mixed phase vibroseis deconvolution. The minimum phase and vibroseis solutions may be calculated via the Wiener-Levinson or Hilbert algorithms. The vibroseis correction can be calculated from input sweep traces, or by user specified sweep parameters. Time variant deconvolution can be performed over multiple time zones.

In order to address band-limited noise which may fall outside of the surface consistent design window, SDCON can optionally apply a zero phase spectral balancing to the data after deconvolution, which can perform either time variant whitening of the spectrum of each trace, or time variant suppression of anomalously high bands in the spectrum.