Early estimation of principal S-wave orientation is
critical for processing.
Alford rotation analysis is a valuable tool to quantify
the time variant S-wave birefringence.
More intense azimuthal anisotropy on the crest and
flanks of the Pinedale anticline suggest potential
fracture sweet spots.
Fast S-wave direction agrees with the strike of near
vertical fractures on the FMI log, and appears to be
sensitive to local horizontal stresses.