Anisotropic Pre-Stack Depth Migration of Seismic Data: A Case Study in Southwest of Iran

Pre-stack depth migration (PSDM) is a well-known tool for dealing with lateral velocity changes and complex structures. Considering anisotropy in PSDM is particularly important where a significant velocity variation with direction results in inaccurate move correction and erroneous well-tie. Anisotropic PSDM (APSDM) corrects the mispositioning of events and alleviates the hockey sticks on common-depth-point (CDP) gathers due to the anisotropy. In this study, we incorporated anisotropy into the Kirchhoff PSDM of seismic data recorded in Abadan Plain, southwestern Iran. The true depth of the horizons (Markers) of the Well AY1 are used to calculate anisotropic parameters before the APSDM. The results are verified using the markers of another well (Well BZ1). The results of applying the APSDM in the Abadan Plain make this method efficient in correcting the miss position events and addressing the hockey sticks on CDP gathers while ensuring correct subsurface positioning of horizons in the zero-offset section