Efficient pure qP-wave simulation and reverse time migration imaging for vertical transverse isotropic (VTI) media

ABSTRACT Anisotropic pseudo-acoustic forward modeling and migration imaging are critical for high-precision seismic exploration. However, the wavefields simulated by traditional coupled anisotropic acoustic wave equation have problems of shear noise numerical simulation instability epsilon that is less than delta. Furthermore, although pure expressed differential operators can solve aforementioned interference issues, its calculation large, particularly in 3D industrial applications, because it has to be solved spectral-based method. In this paper, a vertical transverse isotropic (VTI) medium numerically computed using efficient finite difference method derived. This not only eliminates instabilities, but also allows an wavefield simulation. We implement reverse time (RTM) proposed VTI equation. Two synthetic tests one field data test performed evaluate accuracy robustness developed RTM. The results show RTM correct anisotropy effect on propagation improve precision.