paul sava


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© 2007 PC Sava

Page updated on
April 7, 2018

WEMVA diffraction focusing



This movie shows an example of wave-equation MVA for a zero-offset data set. In this case, we use focusing in space, rather than focusing in offset to assess the quality of the migrated image. The frames of the movie depict: the reflectivity model (diffractors), the background velocity model, a perturbation of the velocity model, the corresponding image perturbation, the backprojection from the image perturbation into the velocity model (fat rays), and the inverted velocity perturbation after 10 iterations of conjugate gradients.

References

Sava, P.C., Biondi, B., 2004, Wave-equation migration velocity analysis - I: Theory, Geophysical Prospecting, v. 52, pp. 593-606. (PDF)
Sava, P.C., Biondi, B., 2004, Wave-equation migration velocity analysis - II: Subsalt imaging example, Geophysical Prospecting, v. 52, pp. 607-623. (PDF)
Sava, P.C., Biondi, B., Etgen, J., 2005, Wave-equation migration velocity analysis by focusing of diffractions and reflections, Geophysics, v. 70, no. 3, U19-U27. (PDF)
Sava, P.C., Vlad, I., 2008, Numeric implementation of wave-equation migration velocity analysis operators, Geophysics, v. 73, pp. VE145-VE159. (PDF)

Figures can be used freely for non-profit educational purposes by acknowledging their source:
© Paul Sava, Center for Wave Phenomena, Colorado School of Mines
http://www.mines.edu/~psava