Introduction to the special issue ‘Advances in Seismic Anisotropy’
Y. Ivanov, I. Psencık, I. Ravve and I. Tsvankin
Journal name: Geophysical Prospecting
Issue: Vol 67, No 9, November 2019 pp. 2263 - 2265
Info: Article, PDF ( 323.94Kb )
Over the past several decades, application of anisotropic models in seismic exploration and global seismology has become almost routine (e.g., Long and Becker 2010; Tsvankin et al. 2010). Standard velocity-analysis and imaging algorithms now operate with transversely isotropic media that often have a tilted, spatially varying symmetry axis (TTI). It has been recognized that optimal processing of many high-quality wideazimuth offshore surveys requires building lower-symmetry orthorhombic models. Most prestack migration algorithms, including those based on the wave equation (e.g., reverse-time migration), have been extended to 3D TTI and orthorhombic media. Still robust parameter estimation for structurally complex anisotropic models remains a big challenge, which is addressed in some of the papers in this Special Issue.