Paper Summary
The Viking Graben is an asymmetric Jurassic rift basin with an eastern flank consisting of multiple basin-ward stepping structural terraces that enter a number of graben sub-basins. Conventional legacy seismic data show presence of clusters of Upper Jurassic wedges close to the fault scarps separating individual terraces. Wells penetrating the faulted terrace edges and clastic wedges found heterogenous Upper Jurassic reservoirs with noncommercial accumulations. Because of great burial depths the basinal Upper Jurassic in the graben centers is poorly imaged with conventional seismic data and although the Viking Graben is a mature petroliferous basin, the deeply buried Jurassic section can be considered underexplored. However, a recent well in the Vana Subbasin reported gas and condensates in thin Upper Jurassic turbidites at depths > 4800 m (well 25/7-11S).