Late Jurassic -Early Cretaceous subsidence and deposition in the NE Hammerfest Basin linked to uplift and erosion of the Loppa High, SW Barents Sea

Uplift movements, followed by erosion are amongst the main reason of the lack of success in oil discovery. These processes can dramatically affect the petroleum system, in terms of destruction of oil accumulation, and need to be carefully analysed. Such events occurred between the Loppa High and the...

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Bibliographic Details
Main Author: Belalahy, Olivier
Other Authors: Prof. Jan Inge Faleide; Prof. Johan Petter Nystuen and Dr. Michel Heeremans
Format: Master Thesis
Language:English
Published: 2009
Subjects:
VDP::450
Barents Sea
Loppa
Hammerfest
Hammerfest Basin
Online Access:http://hdl.handle.net/10852/12657
http://urn.nb.no/URN:NBN:no-22953
Description
Summary:Uplift movements, followed by erosion are amongst the main reason of the lack of success in oil discovery. These processes can dramatically affect the petroleum system, in terms of destruction of oil accumulation, and need to be carefully analysed. Such events occurred between the Loppa High and the Hammerfest Basin several times and a good understanding is necessary to guide in the research for source rocks, reservoir rocks and the migration path connecting them. This thesis work aims to study the differential vertical movement between the NE Hammerfest Basin and Loppa High during Late Jurassic - Early Cretaceous times. This has been accomplished mainly by interpretation of 2D and also 3D seismic data using seismic sequence stratigraphy approach. Chronostratigraphic charts have been produced from the interpreted profiles on three key lines, chosen along the strike of the Hammerfest Basin accross the Asterias Fault Complex. As a result, a synthesis of the Late Jurassic – Early Cretaceous evolution of the Hammerfest Basin has been performed and put into a regional context, with four main stages as follows: - Late Triassic – late Middle Jurassic (pre-rift: megasequence 1); - Late Middle Jurassic – earliest Cretaceous (syn-rift: megasequence 2) - Earliest Cretaceous – Early Cenozoic (post-rift: megasequence 3, 4, and 5) - Late Cenozoic (regional uplift and erosion)

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