I introduce an instantaneous phase-unwrapping method for simplifying the seismic geomorphology–based and stratal slice–based approach to studying the staking pattern of seismically thin beds. The unwrapping of instantaneous-phase traces can be used to convert a thin-bed waveform from traveltime domain to relative geologic-time or depth domain by assigning a complete phase cycle to a color sequence. The color differences on an instantaneous-phase stratal slice represent phase changes, and therefore geologic-time perturbations, between different sediment bodies. In many cases, the method has enough sensitivity to detect thin beds well below seismic-resolution limit. Although thin-bed waveform retrieval from sequential-amplitude stratal slices remains a more accurate and reliable procedure for studying thin-bed seismic chronostratigraphy below seismic resolution limit, the phase-unwrapping method does not need the assumptions of known wavelet and sand–shale acoustic relationship, and requires less training.
Presentation Date: Tuesday, October 18, 2016
Start Time: 3:20:00 PM
Presentation Type: ORAL