Kirchhoff prestack depth migration in 3-D models: Comparison of triclinic anisotropy with simpler anisotropies

Vaclav Bucha


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.

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In: Seismic Waves in Complex 3-D Structures, Report 21, pp. 47-62, Dep. Geophys., Charles Univ., Prague, 2011.