Kirchhoff prestack depth migration in 3-D models: Comparison of triclinic anisotropy with simpler anisotropies
2011
Abstrakt
We apply the Kirchhoff prestack depth migration to the calculation of migrated sections in 3-D simple anisotropic homogeneous velocity models. We generate recorded wave field in models composed of two homogeneous layers separated by one non-inclined or inclined curved interface.
The anisotropy in the upper layer is triclinic. We test Kirchhoff prestack depth migration in velocity models with different types of anisotropy: a triclinic anisotropic medium, an isotropic medium, transversely isotropic media with a horizontal (HTI) and vertical (VTI) symmetry axis.
We show errors of migrated interface caused by inaccurate velocity models used for migration. The study is limited to P-waves