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North Sea – Cretaceous plays

North Sea - Cretaceous plays

Group/Formation Age Area Reservoir rock Depositional environment Trap Source rock Critical factors Examples of fields Examples of discoveries Examples exploration wells
nkl-2 Cromer Knoll Group with Agat Formation Berriasian? Cenomanian? Sogn Graben Sandstone Deep marine Stratigraphic Upper Jurassic shale (Draupne and Heather Formations), Lower to Middle Jurassic shale and coal (Ness Formation?) Distribution of reservoir

nku-2 Shetland Group with Hod, Tor and Ekofisk Formations, Rogaland Group with Vidar Formation. Santonian(?) – Early Paleocene Central part of Central Graben from Albuskjell to Hod Chalk Open marine, redeposited Halokinetic and stratigraphic Upper Jurassic (Mandal and Draupne Formations) Reservoir quality

nku-3 Shetland Group with Hod, Tor and Ekofisk Formations, Rogaland Group with Vidar Formation. Santonian(?) – Early Paleocene Surrounding parts in Central Graben outside the large chalk fields Chalk Open marine, redeposited Halokinetic and stratigraphic Upper Jurassic (Mandal and Draupne Formations) Reservoir quality

nku-4 Shetland Group with Hod, Tor and Ekofisk Formations, Rogaland Group with Vidar Formation. Santonian(?) – Early Paleocene Utsira High Chalk Open marine, redeposited Halokinetic and stratigraphic Upper Jurassic (Mandal and Draupne Formations) Reservoir quality

nku-5 Shetland Group with Kyrre Formation, Tryggvason Formation is possible Cenomanian - Maastrichtian Sogn Graben Sandstone Deep Marine Mainly statigraphic, structural is a possibility Upper Jurassic shale (Draupne- and Heather Formation), Lower to Middel Jurassic shale and coal Distribution of reservoir and seal