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Improving the amplitude accuracy of downward continuation operators

Ioan Vlad, Thomas Tisserant, and Biondo Biondi

nick@sep.stanford.edu, thomas@sep.stanford.edu, biondo@sep.stanford.edu

ABSTRACT

While wave-equation downward continuation correctly accounts for traveltimes, the amplitude and phase of the image can be improved. We show concrete ways of implementing a previously proposed improvement using both mixed-domain and finite-difference extrapolators. We apply the corrections to constant velocity, constant vertical velocity gradient and v(x,z) cases and show that the correction brings amplitudes closer to the theoretical values.



 
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Stanford Exploration Project
7/8/2003