North Sea – Upper Jurassic plays
| Group/Formation | Age | Area | Reservoir rock | Depositional environment | Trap | Source rock | Critical factors | Examples of fields | Examples of discoveries | |
|---|---|---|---|---|---|---|---|---|---|---|
| nju-1 | Viking Group with Heather, Krossfjord, Fensfjord and Sognefjord Formations | Bajocian - Barriasian? | Sogn Graben, Horda Platform, Stord Basin, northern part of Viking Graben and Øygarden Fault Complex | Sandstone | Marginal to shallow marine and deep water | Stratigraphic and structural, rotated fault blocks | The main source rock is Upper Jurassic shale (Draupne and Mandal Formations). The oil discovery 2/2-5 (NJU-3) is sourced from an unknown, possible Pre Triassic source rock | Migration to the eastern part of the play | ||
| nju-2 | Viking Group with intra Draupne and intra Heather Formations | Oxfordian - Barriasian | Tampen Spur, Sogn Graben and northern part of Viking Graben | Sandstone | Stratigraphic and structural, rotated fault blocks | Stratigraphic and structural, rotated fault blocks | The main source rock is Upper Jurassic shale (Draupne and Mandal Formations). The oil discovery 2/2-5 (NJU-3) is sourced from an unknown, possible Pre Triassic source rock | Presence of reservoir and seal | ||
| nju-3 | Vestland Group with Ula Formation, Tyne Group with Eldfisk and Farsund Formations, Viking Group with intra Draupne, intra Heather and Brae Formations | Oxfordian - Barriasian | Central Graben and southern part of Viking Graben | Sandstone | Marginal to shallow marine and deep water | Stratigraphic and structural, rotated fault blocks | The main source rock is Upper Jurassic shale (Draupne and Mandal Formations). The oil discovery 2/2-5 (NJU-3) is sourced from an unknown, possible Pre Triassic source rock | Presence of reservoir |
