The differences in properties between parallel geometry and orthogonal geometry call for different approaches to various prestack processing steps. Indeed, a number of authors have published results of prestack processing of orthogonal geometry data on basis of geometry-oriented approaches, such as 3Dfk-filtering of cross-spreads. Yet, this treatment of orthogonal geometry is far from being standard in the industry.
This paper discusses the potential of using both crossspread oriented and offset-vector oriented prestack processing operations. In cross-spread oriented processing the spatial continuity inherently present in cross-spreads is exploited as much as possible. In offset-vector oriented processing the data is gathered according to small ranges in the components of the offset vector rather than in absolute-offset ranges as being used predominantly in the industry. In this way, the typical wide-azimuth nature of orthogonal geometry is better taken care of.
