Introduction
- TI models with a vertical (VTI) and tilted (TTI) axis of
symmetry have become practically standard in prestack imaging
projects all over the world (Tsvankin et al., 2010).
- Many sedimentary formations including
sands and carbonates contain vertical or steeply dipping
fracture sets and should be described by effective symmetries lower
than TI (Tsvankin et al., 2010).
- We generate recorded wave field
in 3-D models composed
of two homogeneous layers separated by one non-inclined
or inclined curved interface. The anisotropy in the upper layer
is triclinic.
- We migrate the synthetic data
using 3-D ray-based Kirchhoff prestack depth migration
in single-layer homogeneous models with various types of anisotropy:
a triclinic anisotropic medium, an isotropic medium,
transversely isotropic media with a horizontal (HTI)
and vertical (VTI) symmetry axis.
- We show position errors
of migrated interfaces caused by inaccurate velocity models used
for migration.