North Sea – Upper Triassic to Middle Jurassic plays

	Group/Formation	Age	Area	Reservoir rock	Depositional environment	Trap	Source rock	Critical factors	Examples of fields	Examples of discoveries	Examples exploration wells
nru,jm-1	Hegre Group with Lunde Formation, Statfjord gp, Dunlin Group with Amundsen and Cook Formations, Brent Group with Broom, Etive, Rannoch, Oseberg, Ness and Tarbert Formations	Norian - Callovian	Møre Basin, Tampen Spur, Lomre Terrace, Sogn Graben, Horda Platform, northern Viking Graben, Utsira High	Sandstone	Fluvial, deltaic and shallow marine	Structural, rotated fault blocks, occasionally with stratigraphic component, sealing faults	Upper Jurassic shale (Draupne, Heather, Tau, Farsund and Mandal Formations) and Middle Jurassic shale and coal (Gassum, Bryne, Ness and Sleipner Formations, possible Drake Formation	Mature source rock in Farsund Basin	Statfjord Kvitebjørn Gullfaks Oseberg Snorre Brage Valemon Visund Knarr Veslefrikk Martin Linge	30/10-6 34/4-10 (Beta Brent)
njl,jm-1	Hegre Group with Skagerrak Formation, parts of Statfjord Group, Vestland Group with Sleipner and Hugin Formations	Norian - Callovian	Southern Viking Graben, Utsira High, Ling Depression, Jæren High	Sandstone	Fluvial, deltaic and shallow marine	Structural, rotated fault blocks, occasionally with stratigraphic component, sealing faults	Upper Jurassic shale (Draupne, Heather, Tau, Farsund and Mandal Formations) and Middle Jurassic shale and coal (Gassum, Bryne, Ness and Sleipner Formations, possible Drake Formation	Mature source rock in Farsund Basin	Sleipner Vest Ringhorne Øst Sigyn Volve Gungne Gaupe Gina Krog Ivar Aasen	15/3-4 (Sigrun) 15/5-2 Eirin 15/12-8 25/2-4 Lille-Frigg 25/6-1
njm-1	Vestland Group with Bryne and Sandnes Formations	Baijocian - Callovian	Egersund Basin	Sandstone	Fluvial, deltaic and shallow marine	Structural, rotated fault blocks, occasionally with stratigraphic component, sealing faults	Upper Jurassic shale (Draupne, Heather, Tau, Farsund and Mandal Formations) and Middle Jurassic shale and coal (Gassum, Bryne, Ness and Sleipner Formations, possible Drake Formation	Mature source rock in Farsund Basin	Yme	17/12-1 Vette 17/12-2 (Brisling) 18/10-1 (Mackerel) 17/3-1	17/6-1
njl,jm-4	Hegre Group with Skagerak Formations, Gassum Formation, Vestland Group with Bryne Formations	Rhaetian - Bathonian	Central Graben	Sandstone	Fluvial, deltaic and shallow marine	Structural, rotated fault blocks, occasionally with stratigraphic component, sealing faults	Upper Jurassic shale (Draupne, Heather, Tau, Farsund and Mandal Formations) and Middle Jurassic shale and coal (Gassum, Bryne, Ness and Sleipner Formations, possible Drake Formation	Mature source rock in Farsund Basin	Trym		2/8-12 S