Analysis of scattered, or diffraction energy (the seismic response of small-scale
objects) in the seismic data from Canterbury Basin, New Zealand reveals additional
geological information about depositional patterns in sedimentary deposits. Diffrac-
tion images from the seismic response for Canterbury Basin provide complementary
interpretation tools to the conventional specular reflection images. To image diffrac-
tions for a dataset from Canterbury Basin, I take the following steps: First, I attenuate
multiples using a surface multiple prediction algorithm to predict multiples and apply
regularized nonstationary regression to adaptively subtract the predicted multiples.
Next, I separate diffractions using the plane-wave destruction method. The plane-
wave destruction method removes conventional reflected energy in order to enhance
the diffracted energy. I then apply a velocity continuation method on diffraction data
to estimate migration velocities and then migrate the data using Kirchhoff migration
in the dip-angle-gather domain. The resultant conventional and diffraction images are
improved images suitable for geological interpretation of prograding sediment drifts. / text
| Identifer | oai:union.ndltd.org:UTEXAS/oai:repositories.lib.utexas.edu:2152/20033 |
| Date | 25 April 2013 |
| Creators | Al-Hadab, Salah Ahmad |
| Source Sets | University of Texas |
| Language | en_US |
| Detected Language | English |
| Format | application/pdf |
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