Diffraction imaging of sediment drifts in the Canterbury Basin, New Zealand
| dc.contributor.advisor | Fomel, Sergey B. | en |
| dc.contributor.committeeMember | Stoffa, Paul | en |
| dc.contributor.committeeMember | Tatham, Robert | en |
| dc.creator | Al-Hadab, Salah Ahmad | en |
| dc.date.accessioned | 2013-04-25T17:46:30Z | en |
| dc.date.issued | 2012-12 | en |
| dc.date.submitted | December 2012 | en |
| dc.date.updated | 2013-04-25T17:46:31Z | en |
| dc.description | text | en |
| dc.description.abstract | 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. | en |
| dc.description.department | Earth and Planetary Sciences | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.uri | http://hdl.handle.net/2152/20033 | en |
| dc.language.iso | en_US | en |
| dc.subject | Diffraction imaging | en |
| dc.subject | Sediment drifts | en |
| dc.subject | Diffraction energy | en |
| dc.subject | Canterbury Basin | en |
| dc.subject | New Zealand | en |
| dc.title | Diffraction imaging of sediment drifts in the Canterbury Basin, New Zealand | en |
| thesis.degree.department | Geological Sciences | en |
| thesis.degree.discipline | Geological Sciences | en |
| thesis.degree.grantor | The University of Texas at Austin | en |
| thesis.degree.level | Masters | en |
| thesis.degree.name | Master of Science in Geological Sciences | en |