A Comparison of High Density Velocity Fields Obtained from Isotropic and Anisotropic PSDM as a Constraint on Amplitude Inversion

Anisotropic prestack depth migration (PSDM) has clear benefits for imaging purposes in<br>many areas. An additional benefit of the anisotropic imaging is that the velocity field derived<br>for migration ties closely to vertical well velocities. It is therefore possible that this velocity<br>field contains more accurate information than an isotropically derived field and, consequently,<br>gives better constraints on amplitude inversion of the seismic data.