Mark S. Egan

Dispersive And Anisotropic Aspects of Stratigraphic Filtering

A seismic parameter of paramount importance to ‘velocity ’ , the explorationist is To aid in the determination of this elusive quantity, the assumptions of elasticity and isotropy are routinely made. The elasticity criterion means that wave propagation is non-dispersive, thereby implying that velocity is frequency-independent. The isotropy hypothesis allows us to conclude that the velocity is also direction-independent. A disquieting fact though, is that even if these 2 assumptions are valid for all rock components in the earth, the seismic section can still exhibit evidence of behavior which is neither elastic nor isotropic.