Diffraction imaging of sediment drifts in the Canterbury Basin, New Zealand

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 Canterbu...

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Main Author: Al-Hadab, Salah Ahmad
Format: Others
Language:en_US
Published: 2013
Subjects:
Online Access:http://hdl.handle.net/2152/20033
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spelling ndltd-UTEXAS-oai-repositories.lib.utexas.edu-2152-200332015-09-20T17:14:54ZDiffraction imaging of sediment drifts in the Canterbury Basin, New ZealandAl-Hadab, Salah AhmadDiffraction imagingSediment driftsDiffraction energyCanterbury BasinNew ZealandAnalysis 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.text2013-04-25T17:46:30Z2012-122012-11-26December 20122013-04-25T17:46:31Zapplication/pdfhttp://hdl.handle.net/2152/20033en_US
collection NDLTD
language en_US
format Others
sources NDLTD
topic Diffraction imaging
Sediment drifts
Diffraction energy
Canterbury Basin
New Zealand
spellingShingle Diffraction imaging
Sediment drifts
Diffraction energy
Canterbury Basin
New Zealand
Al-Hadab, Salah Ahmad
Diffraction imaging of sediment drifts in the Canterbury Basin, New Zealand
description 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
author Al-Hadab, Salah Ahmad
author_facet Al-Hadab, Salah Ahmad
author_sort Al-Hadab, Salah Ahmad
title Diffraction imaging of sediment drifts in the Canterbury Basin, New Zealand
title_short Diffraction imaging of sediment drifts in the Canterbury Basin, New Zealand
title_full Diffraction imaging of sediment drifts in the Canterbury Basin, New Zealand
title_fullStr Diffraction imaging of sediment drifts in the Canterbury Basin, New Zealand
title_full_unstemmed Diffraction imaging of sediment drifts in the Canterbury Basin, New Zealand
title_sort diffraction imaging of sediment drifts in the canterbury basin, new zealand
publishDate 2013
url http://hdl.handle.net/2152/20033
work_keys_str_mv AT alhadabsalahahmad diffractionimagingofsedimentdriftsinthecanterburybasinnewzealand
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