The Mjølnir Impact Crater in the central Barents Sea - a potential hydrocarbon system?
A meteor impact event on the Bjameland Platform in the Norwegian Barents Sea about 142 ± 2.6 million years ago formed the Mjølnir Impact Crater. The structure has diameter of 40 km impacting the Mesozoic stratigraphy, and has previously been investigated with emphasis on the dynamics of the impact,...
Main Author: | |
---|---|
Format: | Master Thesis |
Language: | English |
Published: |
UiT Norges arktiske universitet
2020
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/21885 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/21885 |
---|---|
record_format |
openpolar |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/21885 2023-05-15T15:38:42+02:00 The Mjølnir Impact Crater in the central Barents Sea - a potential hydrocarbon system? Rein, Sindre Arnesen 2020-05-15 https://hdl.handle.net/10037/21885 eng eng UiT Norges arktiske universitet UiT The Arctic University of Norway https://hdl.handle.net/10037/21885 openAccess Copyright 2020 The Author(s) VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Petroleumsgeologi og -geofysikk: 464 VDP::Mathematics and natural science: 400::Geosciences: 450::Petroleum geology and petroleum geophysics: 464 GEO-3900 Master thesis Mastergradsoppgave 2020 ftunivtroemsoe 2021-07-28T22:53:28Z A meteor impact event on the Bjameland Platform in the Norwegian Barents Sea about 142 ± 2.6 million years ago formed the Mjølnir Impact Crater. The structure has diameter of 40 km impacting the Mesozoic stratigraphy, and has previously been investigated with emphasis on the dynamics of the impact, the structure formation, sedimentation and post-impact tectonics. Impact structures have proven to be petroliferous elsewhere in the world. By applying new seismic 2D- and P-cable data and integrating prior studies, this thesis focuses on how the structure of the Mjølnir Impact Crater might represent a petroleum system in the Barents Sea. The structural setting of the Mjølnir impact Crater shows several potential structural traps, including horst and graben structures within the crater, and listric rim faults at the periphery. A simplified 1D maturation model of potential source rocks in the area, indicate that the Hekkingen and Steinkobbe formations are sufficiently matured and have generated oil, while the Lower Triassic formations have generated gas. These source rocks may potentially charge the Mjølnir Impact Crater by petroleum migration vertically along deep-seated faults and laterally in the southward dipping stratigraphy, from the Nordkapp Basin area. The southern section of the Mjølnir Impact Crater is considered have the highest hydrocarbon potential, due to a thicker overburden and favorable migration pathways. Five seismic anomalies of high amplitude have been identified in the southern Mjølnir Impact Crater. These are interpreted to represent hydrocarbon accumulations, structurally trapped in horsts and by listric rim faults, and overlain by Upper Jurassic shales with sealing properties. Volumetric calculations for one of the amplitude anomalies suggest that 24,4 MMSm3 of oil may be accumulated at the southern boundary of the crater. In conclusion, presence of source rocks, migration pathways, reservoir and traps supported by observations of seismic amplitude anomalies suggests that the Mjølnir Impact Crater represents a potential hydrocarbon system. Master Thesis Barents Sea Nordkapp Nordkapp Basin steinkobbe University of Tromsø: Munin Open Research Archive Barents Sea Hekkingen ENVELOPE(17.832,17.832,69.597,69.597) |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Petroleumsgeologi og -geofysikk: 464 VDP::Mathematics and natural science: 400::Geosciences: 450::Petroleum geology and petroleum geophysics: 464 GEO-3900 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Petroleumsgeologi og -geofysikk: 464 VDP::Mathematics and natural science: 400::Geosciences: 450::Petroleum geology and petroleum geophysics: 464 GEO-3900 Rein, Sindre Arnesen The Mjølnir Impact Crater in the central Barents Sea - a potential hydrocarbon system? |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Petroleumsgeologi og -geofysikk: 464 VDP::Mathematics and natural science: 400::Geosciences: 450::Petroleum geology and petroleum geophysics: 464 GEO-3900 |
description |
A meteor impact event on the Bjameland Platform in the Norwegian Barents Sea about 142 ± 2.6 million years ago formed the Mjølnir Impact Crater. The structure has diameter of 40 km impacting the Mesozoic stratigraphy, and has previously been investigated with emphasis on the dynamics of the impact, the structure formation, sedimentation and post-impact tectonics. Impact structures have proven to be petroliferous elsewhere in the world. By applying new seismic 2D- and P-cable data and integrating prior studies, this thesis focuses on how the structure of the Mjølnir Impact Crater might represent a petroleum system in the Barents Sea. The structural setting of the Mjølnir impact Crater shows several potential structural traps, including horst and graben structures within the crater, and listric rim faults at the periphery. A simplified 1D maturation model of potential source rocks in the area, indicate that the Hekkingen and Steinkobbe formations are sufficiently matured and have generated oil, while the Lower Triassic formations have generated gas. These source rocks may potentially charge the Mjølnir Impact Crater by petroleum migration vertically along deep-seated faults and laterally in the southward dipping stratigraphy, from the Nordkapp Basin area. The southern section of the Mjølnir Impact Crater is considered have the highest hydrocarbon potential, due to a thicker overburden and favorable migration pathways. Five seismic anomalies of high amplitude have been identified in the southern Mjølnir Impact Crater. These are interpreted to represent hydrocarbon accumulations, structurally trapped in horsts and by listric rim faults, and overlain by Upper Jurassic shales with sealing properties. Volumetric calculations for one of the amplitude anomalies suggest that 24,4 MMSm3 of oil may be accumulated at the southern boundary of the crater. In conclusion, presence of source rocks, migration pathways, reservoir and traps supported by observations of seismic amplitude anomalies suggests that the Mjølnir Impact Crater represents a potential hydrocarbon system. |
format |
Master Thesis |
author |
Rein, Sindre Arnesen |
author_facet |
Rein, Sindre Arnesen |
author_sort |
Rein, Sindre Arnesen |
title |
The Mjølnir Impact Crater in the central Barents Sea - a potential hydrocarbon system? |
title_short |
The Mjølnir Impact Crater in the central Barents Sea - a potential hydrocarbon system? |
title_full |
The Mjølnir Impact Crater in the central Barents Sea - a potential hydrocarbon system? |
title_fullStr |
The Mjølnir Impact Crater in the central Barents Sea - a potential hydrocarbon system? |
title_full_unstemmed |
The Mjølnir Impact Crater in the central Barents Sea - a potential hydrocarbon system? |
title_sort |
mjølnir impact crater in the central barents sea - a potential hydrocarbon system? |
publisher |
UiT Norges arktiske universitet |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/21885 |
long_lat |
ENVELOPE(17.832,17.832,69.597,69.597) |
geographic |
Barents Sea Hekkingen |
geographic_facet |
Barents Sea Hekkingen |
genre |
Barents Sea Nordkapp Nordkapp Basin steinkobbe |
genre_facet |
Barents Sea Nordkapp Nordkapp Basin steinkobbe |
op_relation |
https://hdl.handle.net/10037/21885 |
op_rights |
openAccess Copyright 2020 The Author(s) |
_version_ |
1766369946581860352 |