USP Scripts for QC and Correction of Spatial Phase Variability

USP Scripts for QC and Correction of Spatial Phase Variability. [February 1998] Construsted a set of USP scripts that allow QC and correction of spatial phase variability. Data requirements are: 1) seimic data, and 2) xyz horizons picked at horizons spanning the geologic column. In this method, short window slabs of data are extracted surrounding each picked horizon; an average phase distribution map is then computed for each slab. These maps are then phase vector summed to determine the average phase distribution that exists within all horizons (i.e. the entire geologic column). At this stage in the process, this average phase map is QCd for phase variability. If the map exhibits a flat phase response, no correction is necessary. If however, the map exhibits variability, these phase values (1 per x,y coordinate) are loaded into trace headers; and each trace is phase rotated by the phase value stored in the header. The whole QC procedure can then be repeated to ensure that the resulting data exhibits a spatially flat phase response.