Field Trip to the Hornelen Basin

Dr. Caritia Augustsson (Professor associate), Dr. Dora Marin (Professor associate), Dr. Christopher Townsend (professor II), Guro Skarstein (PhD candidate), and Siri Gloppen Gjersdal (PhD candidate) went on a field trip to the Hornelen basin this week. The Hornelen basin is the largest of three Devonian basins located in western Norway, related to the collapse of the Caledonides. The field trip gave us an insight into what we can expect in the upper Paleozoic basins in the North Sea. The weath...
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Sponsor Meeting-Preliminary Agenda

Date: 11.02.2019 Time: 9:30 Place: Kjølv Egelands hus, rom  E-166 Time Speaker Presentation     9:30 - 9:50 Alejandro Escalona Welcome and Introduction     9:50 - 10:10 Sverre Ohm Smoking gun; Oils with atypical composition…pre-Jurassic origin?     10:10 - 10:40 Guro Skarstein Back to where it all started; Hunting for a Paleozoic petroleum system in the North Sea. How to search for Paleozoic contribution in mainly Jurassic derived oils?     10:40 - 11:20 Alejandro Escalona D...
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Specific tasks and deliverables

As part of the PhD study, the following tasks are expected Characterization and Mapping of Paleozoic sub-basins Geochemical identification of Paleozoic oils Basin modelling and petroleum potential The main deliverables will be all produced interpretations, including maps, correlations and cross-sections. All results from the geochemical analysis and basin modelling will also be provided. A main result will be the PhD dissertation, which will represent the compilation of all materia...
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Evidences for Pre-Jurassic oils in the North Sea

Embla field producing oil from Permian and Devonian reservoirs:     Reservoir sand with GC trace of produced oil:     Core plugs of Embla rhyolites with GC of biodegraded oil, and re-generated waxy oil from the biodegraded oil. The latter was trapped in fluid inclusions roughly 200Ma ago, ie. Pre-Jurassic:     Typical Kimmeridge oil with low wax, concave n-alkane profile, absence of gammacerane whereas Paleozoic sourced oils are different:  ...
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Background

Oils are known to have been generated by pre-Jurassic source rocks on the British Continental Shelf (e.g. British Geological Survey 2016, Peters et. al. 1989). The large variation in oil composition in different compartments of the J-Block discussed by Lines and Auld, 2004, may as well reflect contribution from source rocks of various ages. On the Norwegian part of the North Sea Paleozoic generated oils are described from the Embla Field (Pedersen et al., 2006; Ohm et al., 2012; Abay et al., 201...
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Petroleum potential

E-W interpreted seismic line showing the main Paleozoic petroleum system proposed for the southern North Sea, Sørvestlandet High area (Doudouh, 2017) Source Rock and Migration in the Sørvestlandet area The Mesozoic formations that are the main source rocks in the Central Graben (Mandal, Haugesund and Farsund Formations) (Glennie, 2009) are mostly immature in the Mandal High, Sørvestlandet High area. The Jurassic source rocks in the Søgne Basin are too shallow to have generated and expell...
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