Processing and Interpretation of Multichannel Seismic Reflection Data Acquired off Isfjorden, Svalbard

The Svalbard archipelago has been complexly deformed during its billions of years-long evolution history, where fault zones, other deformation structures and hard seafloor morphology have emerged. This research project has aimed to characterize the main geological structures in the study area locate...

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Main Author: Dincturk, Guney
Format: Master Thesis
Language:English
Published: The University of Bergen 2023
Subjects:
Online Access:https://hdl.handle.net/11250/3045573
id ftunivbergen:oai:bora.uib.no:11250/3045573
record_format openpolar
spelling ftunivbergen:oai:bora.uib.no:11250/3045573 2023-05-15T15:18:24+02:00 Processing and Interpretation of Multichannel Seismic Reflection Data Acquired off Isfjorden, Svalbard Dincturk, Guney 2023-01-23T09:32:49Z application/pdf https://hdl.handle.net/11250/3045573 eng eng The University of Bergen https://hdl.handle.net/11250/3045573 Copyright the Author. All rights reserved Marine Science Seismic Data Processing Marine Geology Isfjorden Seismic Interpretation Imaging Earth Science Geophysics Arctic Geology Svalbard Marine Geophysics 756199 Master thesis 2023 ftunivbergen 2023-03-14T17:41:59Z The Svalbard archipelago has been complexly deformed during its billions of years-long evolution history, where fault zones, other deformation structures and hard seafloor morphology have emerged. This research project has aimed to characterize the main geological structures in the study area located on the western shelf of Spitsbergen by processing and interpreting of four 2D marine seismic reflection profiles. The quality of the seismic data has been influenced by several sorts of noise, dominantly surface-related multiples due to the hard seafloor in the study area, where the velocities of primary waves are approximately 5500 m/s and often escalate up to 6500 m/s at shallow depths. A total of five different processing workflows have been applied to a seismic profile in order to remove the multiples from the data. The multiple extraction & adaptive subtraction approach has been determined as the most effective remedy for multiple attenuation among the tested methods, as it enhanced the signal-to-noise ratio the most. Thanks to that approach, and many other essential processing sequences, including post-stack time migration in the main workflow, the seismic datasets have become almost multiple-free. Seismic interpretation of the four processed profiles has been done to distinguish the main geological setting in the study area. Nine seismic horizons interpreted between the seabed and basement, as well as several major faults, allowed the division into five stratigraphic units, being the Quaternary, Cenozoic, Mesozoic-Paleozoic, Devonian sedimentary successions and the crystalline basement (so-called Hecla Hoek). The thickness and 2D - 3D surface maps including faults have supported the identification of the main structures in the study area: the Hornsund Fault Zone and a Devonian Graben. The interpretation implies a new model describing the development of a N-S trending fault-bounded rift basin, named Devonian Graben structure, as a product of the collapsed Caledonian mountain range due to continental ... Master Thesis Arctic Hornsund Isfjord* Isfjord* Isfjorden Isfjorden Svalbard Spitsbergen University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Hoek ENVELOPE(-65.050,-65.050,-66.000,-66.000) Hornsund ENVELOPE(15.865,15.865,76.979,76.979) Svalbard Svalbard Archipelago Western Shelf ENVELOPE(164.448,164.448,-77.780,-77.780)
institution Open Polar
collection University of Bergen: Bergen Open Research Archive (BORA-UiB)
op_collection_id ftunivbergen
language English
topic Marine Science
Seismic Data Processing
Marine Geology
Isfjorden
Seismic Interpretation
Imaging
Earth Science
Geophysics
Arctic
Geology
Svalbard
Marine Geophysics
756199
spellingShingle Marine Science
Seismic Data Processing
Marine Geology
Isfjorden
Seismic Interpretation
Imaging
Earth Science
Geophysics
Arctic
Geology
Svalbard
Marine Geophysics
756199
Dincturk, Guney
Processing and Interpretation of Multichannel Seismic Reflection Data Acquired off Isfjorden, Svalbard
topic_facet Marine Science
Seismic Data Processing
Marine Geology
Isfjorden
Seismic Interpretation
Imaging
Earth Science
Geophysics
Arctic
Geology
Svalbard
Marine Geophysics
756199
description The Svalbard archipelago has been complexly deformed during its billions of years-long evolution history, where fault zones, other deformation structures and hard seafloor morphology have emerged. This research project has aimed to characterize the main geological structures in the study area located on the western shelf of Spitsbergen by processing and interpreting of four 2D marine seismic reflection profiles. The quality of the seismic data has been influenced by several sorts of noise, dominantly surface-related multiples due to the hard seafloor in the study area, where the velocities of primary waves are approximately 5500 m/s and often escalate up to 6500 m/s at shallow depths. A total of five different processing workflows have been applied to a seismic profile in order to remove the multiples from the data. The multiple extraction & adaptive subtraction approach has been determined as the most effective remedy for multiple attenuation among the tested methods, as it enhanced the signal-to-noise ratio the most. Thanks to that approach, and many other essential processing sequences, including post-stack time migration in the main workflow, the seismic datasets have become almost multiple-free. Seismic interpretation of the four processed profiles has been done to distinguish the main geological setting in the study area. Nine seismic horizons interpreted between the seabed and basement, as well as several major faults, allowed the division into five stratigraphic units, being the Quaternary, Cenozoic, Mesozoic-Paleozoic, Devonian sedimentary successions and the crystalline basement (so-called Hecla Hoek). The thickness and 2D - 3D surface maps including faults have supported the identification of the main structures in the study area: the Hornsund Fault Zone and a Devonian Graben. The interpretation implies a new model describing the development of a N-S trending fault-bounded rift basin, named Devonian Graben structure, as a product of the collapsed Caledonian mountain range due to continental ...
format Master Thesis
author Dincturk, Guney
author_facet Dincturk, Guney
author_sort Dincturk, Guney
title Processing and Interpretation of Multichannel Seismic Reflection Data Acquired off Isfjorden, Svalbard
title_short Processing and Interpretation of Multichannel Seismic Reflection Data Acquired off Isfjorden, Svalbard
title_full Processing and Interpretation of Multichannel Seismic Reflection Data Acquired off Isfjorden, Svalbard
title_fullStr Processing and Interpretation of Multichannel Seismic Reflection Data Acquired off Isfjorden, Svalbard
title_full_unstemmed Processing and Interpretation of Multichannel Seismic Reflection Data Acquired off Isfjorden, Svalbard
title_sort processing and interpretation of multichannel seismic reflection data acquired off isfjorden, svalbard
publisher The University of Bergen
publishDate 2023
url https://hdl.handle.net/11250/3045573
long_lat ENVELOPE(-65.050,-65.050,-66.000,-66.000)
ENVELOPE(15.865,15.865,76.979,76.979)
ENVELOPE(164.448,164.448,-77.780,-77.780)
geographic Arctic
Hoek
Hornsund
Svalbard
Svalbard Archipelago
Western Shelf
geographic_facet Arctic
Hoek
Hornsund
Svalbard
Svalbard Archipelago
Western Shelf
genre Arctic
Hornsund
Isfjord*
Isfjord*
Isfjorden
Isfjorden
Svalbard
Spitsbergen
genre_facet Arctic
Hornsund
Isfjord*
Isfjord*
Isfjorden
Isfjorden
Svalbard
Spitsbergen
op_relation https://hdl.handle.net/11250/3045573
op_rights Copyright the Author. All rights reserved
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