Interpretation of the Upper Red Fork Valley in the Anadarko Basin: A Comparison Study Between Processed, Reprocessed, and High Frequency Seismic Data

Abstract

Seismic lines will be used to determine the amount of downcutting of the Red Fork interval within the Anadarko basin. High frequency seismic data, along with a 2D arbitrary line that runs through a 3D seismic shoot, will be compared to the original 2D data. The comparison of the quality and resolution of processed, reprocessed, and high frequency seismic data will show which seismic data set is easier to pick horizons and in stratigraphic and structural mapping. The lithofacies of the Red Fork sands in this valley system greatly influence the quality of seismic data, whether it is processed, reprocessed, or "HFI". The processed seismic data is not very useful in picking locations of intended horizons. The reflectors are not continuous so there is a lot of guess work as to the intended interval. The reprocessed seismic data gives the interpreter a better idea as to which reflector the Red Fork interval is. Since Line A-A' does not traverse through the upper Red Fork valley system, the reprocessed seismic data is sufficient to use in mapping and identifying the Red Fork interval. In this area of the basin, the "HFI" does not enhance the quality of the data. The "HFI" seismic data gives the interpreter an ideal image of the subsurface, especially in the deepest portion of this upper Red Fork valley system. Because the Red Fork sands, in the deepest part of the channel, are phase III sands, the "HFI" seismic data is useful in identifying the top and base of the Red Fork interval. Since Lines B-B', C-C', and D-D' all traverse through the upper Red Fork valley system, it is wise to use the "HFI" seismic data to interpret and map this area of the Anadarko basin. The amount of migration and increase of fold aids in the ability to interpret this interval.