Sequence stratigraphy of Upper Jurassic reservoir sandstones in the northern part of the Danish Central Trough, North Sea

The Jurassic succession of the northern part of the Danish Central Trough is subdivided into six depositional sequences based on a multi-disciplinary study, including sedimentology, biostratigraphy, seismic interpretation, structural interpretation, log correlation, geochemistry and palynofacies analysis. Three of these sequences include significant sandstone deposits that represent potential reservoirs. The lowermost sequence 1 contains Upper Kimmeridgian backbarrier and shoreface sandstones of the'basal sandstone unit' and the Heno Formation deposited within a transgressive and a highstand systems tract, respectively. Sequence 2 includes Upper Kimmeridgian middle shoreface sandstones of the Heno Formation deposited within a transgressive systems tract. Within sequence 6, Middle-Upper Volgian distal turbidite sandstones have been recognized. These are interpreted as having been deposited within a lowstand and transgressive systems tract and may constitute a reservoir elsewhere in the basin. The sequence stratigraphic boundaries of this study do not match those proposed by the Exxon group. In this rift setting, sequence development was probably controlled predominately by tectonism; eustasy was of subordinate importance.