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Jan Hendrik van Koeverden, University of Oslo (Norway)
Dag Arild Karlsen, University of Oslo (Norway)
Daniel Stoddart, RWE Dea Norge AS, NOW Lundin Petroleum (Norway)
John Clark, RWE Dea Norge AS (Norway)
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Over most areas of the Norwegian Continental Shelf the Upper Jurassic (e.g. the Draupne Formation (Kimmeridge Clay Formation in the UK sector) in the North Sea, the Hekkingen Formation in the Barents Sea), in its variable organo facies development, provides the main petroleum source rocks. Additional sourcing comes from Mid- and Lower Jurassic sequences.
Indications for sourcing of hydrocarbons from alternative sequences exist in the Barents Sea. In its eastern parts the Upper Jurassic is less mature to immature or even absent and play scenarios are likely based on Triassic and Palaeozoic sequences.
In this study we present the initial results from selected Palaeozoic and Triassic potential source rocks and adjacent or intercalated hydrocarbon stained strata from the Finnmark Platform, the Hammerfest Basin and the Nordkapp Basin in the Barents Sea, which have been analysed with regard to organo facies, maturity and generation potential.
The sample set comprises Lower Carboniferous mudstones, siltstones, coals and intercalated sandstones of the Tettegras Formation, mud- and siltstone intervals of the Upper Permian Ørret Formation, as well as sand- and mudstones of the Middle-Triassic Kobbe and Snadd Formations and Norwegian geochemical standard samples.
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