Kirchhoff prestack depth migration in simple models with differently rotated elasticity tensor: orthorhombic and triclinic anisotropy

Summary

We use ray-based Kirchhoff prestack depth migration to calculate migrated sections in simple anisotropic homogeneous velocity models in order to demonstrate 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 curved interface. The anisotropy of the upper layer is orthorhombic or triclinic with the rotation of the tensor of elastic moduli. We apply Kirchhoff prestack depth migration to single-layer velocity models with orthorhombic or triclinic anisotropy with a differently rotated 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.

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