Depth-velocity Modelling and Imaging with Azimuthal Anisotropy in an Onshore Middle Eastern Field

摘要

Seismic data moveout on a full azimuth land 3D dataset revealed strong spatially variant azimuthal anisotropy. It was interpreted as a result of short-wavelength heterogeneity and true azimuthal anisotropy for the interval velocity. Iterative depth-velocity modeling separated these effects and localized intervals with true azimuthal velocity anisotropy (up to 7% and consistent with geological and well data). It was included into PSDM model and significantly changed depth processing results.