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The fundamental concepts presented in
Biondi (2005a) of quantitatively relating
perturbations in anisotropic parameters to the corresponding
reflector movements in angle-domain common-image gathers (ADCIGs)
have been applied to flat reflectors. It
showed on real data how measuring the residual moveout (RMO) in ADCIGs
provides the quantitative information necessary to update the velocity
function in a migration velocity analysis (MVA) procedure.
Aiming to generalize that methodology to the most general case,
we derive an analytical analysis of
residual moveout in anisotropic ADCIGs with dipping reflectors.
After deriving the kinematic analysis in the general case, we apply
the general methodology to the particular case of residual moveout
analysis of reflections from dipping reflectors in a vertical
transverse isotropic (VTI) medium. Synthetic examples demonstrate the
accuracy of the RMO curves predicted by our kinematic
analysis. Furthermore, given the inaccuracy of the RMO
curves predicted when assuming that the reflectors are flat, synthetic
examples also demonstrate the usefulness of the generalization we
present.
Next: Angle-Domain Common-Image Gathers
Up: Jousselin and Biondi: RMO
Previous: Jousselin and Biondi: RMO
Stanford Exploration Project
4/6/2006