3-D Phase shift plus interpolation for hexagonally sampled seismic data

It has been known for many years that hexagonal grids are more efficient to use than the rectangular ones, when acquiring and processing three-dimensional (3-D) seismic data. Many attempts were proposed to process 3-D hexgaonally sampled seismic data but most, if not all, handel the data inappropriately, where, for example, may result in increasing the data size, hence, defeating the main purpose of acquiring and processing 3-D hexagonally sampled seismic data. In this paper, we propose to use an efficient method for imaging hexagonally sampled 3-D seismic data via the Spiral Architecture (SA) indexing scheme. As an example, the Phase Shift Plus Interpolation (PSPI) technique is used to image 3-D hexagonal data in SA. A comparison of post-stack depth imaging of the 3-D SEG/EAGE model results is provided between images using the proposed method and traditional rectangular approach. The proposed technique is exceptionally more efficient with a computational time saving of about 83%.