Anisotropic Parameters Estimation from P- and PS-Converted Wave Data

P138 ANIOSOTROPIC PARAMETER ESTIMATION FROM P- AND PS-CONVERTED WAVE DATA 1 MIN LOU LONG DON PHAM and SHENG LEE PGS Geophysical 10550 Richmond Ave. Houston TX 77042 USA Summary Many sedimentary rocks display transverse isotropy with a vertical symmetry axis (VTI) to seismic waves. The VTI significantly affects both focusing and positioning in seismic data. Estimating VTI parameters is the first critical step in performing anisotropic time and depth seismic data processing. In this paper we present a procedure to estimate interval VTI parameters in multi-layered VTI media from both P- and PS-converted (C) wave data. First based on an