Short Window Fourier Transform workflow could successfully image the channel's stratigraphic features and confirm results obtained from AVO analysis and inversion run on the data before being stacked. Our workflow starts from selecting a continuous horizon that was close and conforms to the channel interval we then run spectral analyses for the channel area. Furthermore, AVO inversion revealed additional information about lithology and fluid content in the channel. From previous AVO analysis and modeling, a strong Class III AVO anomaly has been observed at the top of the porous sandstone in the upper valley, whereas shale had a very different AVO response. We study the spectral decomposition response to the hydrocarbons presence in the Glauconitic channel of Early Cretaceous age. Acted as stand-in for the Head of Geophysics for to two seismic. Mapping of seismic amplitudes on 3D data, and carry out Spectral decomposition using Shell’s GeoSign (nDI) Interpretation platform. Differentiation of prospective channel sands and non-productive shales was always problematic due to the similarity in P-wave impedance of these two lithotypes. Carry out 3D seismic (sparse spike) inversion using Hampson & Russell STRATA.
In this area channels can be filled with sands and/or shales. A method of performing a processing on seismic traces comprising the step of performing a constrained High Resolution Radon decomposition at various frequencies, wherein the Radon decomposition at a given frequency is constrained as a function of the Radon decomposition at least a lower frequency. Blackfoot field, Alberta, Canada, has produced oil and gas from a Glauconitic compound incised valley-system.