Depth‐domain velocity analysis in VTI media using surface P-wave data: Is it feasible?

摘要: The main difficulties in anisotropic velocity analysis and inversion using surface seismic data are associated with the multiparameter nature of problem inherent trade‐offs between model parameters. For most common model, transverse isotropy a vertical symmetry axis (VTI media), P-wave kinematic signatures controlled by V0 parameters e δ. However, only two combinations these parameters—NMO from horizontal reflector Vnmo(0) anellipticity coefficient η—can be determined reflection traveltimes if medium above is laterally homogeneous. While η sufficient for time‐domain imaging VTI media, they cannot used to resolve build models needed depth migration. Here, we demonstrate that can inverted all three relevant (V0, δ) contains nonhorizontal intermediate i...