Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea
PS seismic data from the Snøhvit field are compared with seismic modelling to understand the effect of azimuthal separation and incidence angle on the imaging of faults and associated horizon discontinuities. In addition, the frequency content of seismic waves backscattered from faults is analysed....
Published in: | Petroleum Geoscience |
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Format: | Article in Journal/Newspaper |
Language: | English |
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The Geological Society, Storbritannia
2021
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Online Access: | https://hdl.handle.net/11250/3051979 https://doi.org/10.1144/petgeo2020-044 |
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ftunivstavanger:oai:uis.brage.unit.no:11250/3051979 2023-06-11T04:10:34+02:00 Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea Cunningham, Jennifer Elizabeth Weibull, Wiktor Waldemar Cardozo, Nestor Iacopini, David 2021-12-08T15:47:06Z application/pdf https://hdl.handle.net/11250/3051979 https://doi.org/10.1144/petgeo2020-044 eng eng The Geological Society, Storbritannia Cunningham, J. E., Weibull, W. W., Cardozo, N., & Iacopini, D. (2022). Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea. Petroleum Geoscience, 28(1), petgeo2020-044. urn:issn:1354-0793 https://hdl.handle.net/11250/3051979 https://doi.org/10.1144/petgeo2020-044 cristin:1966340 The owners/authors Petroleum Geoscience Peer reviewed Journal article 2021 ftunivstavanger https://doi.org/10.1144/petgeo2020-044 2023-05-29T16:01:54Z PS seismic data from the Snøhvit field are compared with seismic modelling to understand the effect of azimuthal separation and incidence angle on the imaging of faults and associated horizon discontinuities. In addition, the frequency content of seismic waves backscattered from faults is analysed. The study area consists of a horst structure delimited by a northern fault dipping NW and oblique to the E-W survey orientation, and a southern fault dipping SSW and subparallel to the survey. Due to the raypath asymmetry of PS reflections, the northern fault is imaged better by azimuthally partitioned W data that include receivers downdip of the fault, relative to the sources, than by E data where the receivers are updip from the sources. Partial stack data show a systematic increase in the PS fault-reflected amplitude and therefore quality of fault imaging with increasing incidence angle. Fault images are dominated by internal low-medium frequency shadows surrounded by medium- high frequencies haloes. Synthetic experiments suggest that this is due to the interaction of specular waves and diffractions, and the spectral contribution from the fault signal, which increases with fault zone complexity. These results highlight the impact of survey geometry and processing workflows on fault imaging. acceptedVersion Article in Journal/Newspaper Barents Sea Snøhvit University of Stavanger: UiS Brage Barents Sea Petroleum Geoscience 28 1 |
institution |
Open Polar |
collection |
University of Stavanger: UiS Brage |
op_collection_id |
ftunivstavanger |
language |
English |
description |
PS seismic data from the Snøhvit field are compared with seismic modelling to understand the effect of azimuthal separation and incidence angle on the imaging of faults and associated horizon discontinuities. In addition, the frequency content of seismic waves backscattered from faults is analysed. The study area consists of a horst structure delimited by a northern fault dipping NW and oblique to the E-W survey orientation, and a southern fault dipping SSW and subparallel to the survey. Due to the raypath asymmetry of PS reflections, the northern fault is imaged better by azimuthally partitioned W data that include receivers downdip of the fault, relative to the sources, than by E data where the receivers are updip from the sources. Partial stack data show a systematic increase in the PS fault-reflected amplitude and therefore quality of fault imaging with increasing incidence angle. Fault images are dominated by internal low-medium frequency shadows surrounded by medium- high frequencies haloes. Synthetic experiments suggest that this is due to the interaction of specular waves and diffractions, and the spectral contribution from the fault signal, which increases with fault zone complexity. These results highlight the impact of survey geometry and processing workflows on fault imaging. acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Cunningham, Jennifer Elizabeth Weibull, Wiktor Waldemar Cardozo, Nestor Iacopini, David |
spellingShingle |
Cunningham, Jennifer Elizabeth Weibull, Wiktor Waldemar Cardozo, Nestor Iacopini, David Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea |
author_facet |
Cunningham, Jennifer Elizabeth Weibull, Wiktor Waldemar Cardozo, Nestor Iacopini, David |
author_sort |
Cunningham, Jennifer Elizabeth |
title |
Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea |
title_short |
Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea |
title_full |
Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea |
title_fullStr |
Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea |
title_full_unstemmed |
Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea |
title_sort |
investigating the ps seismic imaging of faults using seismic modelling and data from the snøhvit field, barents sea |
publisher |
The Geological Society, Storbritannia |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/3051979 https://doi.org/10.1144/petgeo2020-044 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Snøhvit |
genre_facet |
Barents Sea Snøhvit |
op_source |
Petroleum Geoscience |
op_relation |
Cunningham, J. E., Weibull, W. W., Cardozo, N., & Iacopini, D. (2022). Investigating the PS seismic imaging of faults using seismic modelling and data from the Snøhvit field, Barents Sea. Petroleum Geoscience, 28(1), petgeo2020-044. urn:issn:1354-0793 https://hdl.handle.net/11250/3051979 https://doi.org/10.1144/petgeo2020-044 cristin:1966340 |
op_rights |
The owners/authors |
op_doi |
https://doi.org/10.1144/petgeo2020-044 |
container_title |
Petroleum Geoscience |
container_volume |
28 |
container_issue |
1 |
_version_ |
1768385042380226560 |