We use the ray-based Kirchhoff prestack depth migration to calculate migrated sections in simple anisotropic homogeneous velocity models in order to show the impact of rotation of the tensor of elastic moduli on migrated images. The recorded wave field is generated in models composed of two homogeneous layers separated by a non-inclined curved interface. The anisotropy of the upper layer is orthorhombic with a differently rotated tensor of elastic moduli. We apply the Kirchhoff prestack depth migration to single-layer velocity models with orthorhombic anisotropy with and without the rotation of the tensor of elastic moduli. We show and discuss the errors of the migrated interface caused by incorrect velocity models used for migration. The study is limited to P-waves.
3-D Kirchhoff prestack depth migration, anisotropic velocity model, rotation of the tensor of elastic moduli, orthorhombic anisotropy
The paper is available in PDF (4926 kB).