A Practical Approach to Compensate for the Azimuth Anisotropy in 3D PS Converted Wave Processing

A practical approach is developed to compensate for azimuthal anisotropy in 3D PS converted wave processing. This method involves fitting the measured velocity variation into a velocity ellipse and applying NMO correction with this velocity ellipse before stacking. We have derived a new least-square fitting algorithm and developed the necessary tools. The tools are applied to a land 3D dataset. The processing results show that the events with azimuthal variation in velocity applied are clearer and better focused, so that the image is enhanced.