Draugen Oil Field, Haltenbanken Province, Offshore Norway: ABSTRACT

Late Jurassic rift physiography of the Froan Basin and Frøya High, offshore Mid‐Norway: Development of a syn‐rift shallow marine system

“…We have shown that reverse subsidence modelling can help estimate the paleowater depths present during ancient rifting, and as such can help constrain depositional settings previously only inferred from borehole and seismic data. Our results support the previous interpretation of submarine erosion along the Bremstein Fault Complex (Elliott et al, 2012, 2021), and the uplift generating shallow water depths along the footwall of the Vingleia and Klakk fault complexes (Bell et al, 2014; Chiarella et al, 2020; Elliott et al, 2017, 2021; Henstra et al, 2023; Jones et al, 2020; Provan, 1992; Van der Zwan, 1990). As such, we provide a constrained geographical extent of the shallow water depth that occurred in the Froan Basin and Frøya High during the Late Jurassic—Early Cretaceous rift episode.…”

“…6407/9-1), southwest of the Draugen Field area in well 6407/11-1 and on the central Frøya High in wells 6306/6-1 and 6306/9-1 (Figure 1b). Early depositional models for the Rogn Formation from the Draugen Field area, and more recent studies of the Vingleia and Klakk fault complex, support the rift physiography shown herein, with sediment being eroded from the uplifted areas and transported back onto the footwall, down the gently dipping dipslope (Bell et al, 2014;Chiarella et al, 2020;Elliott et al, 2017Elliott et al, , 2021Goesten & Nelson, 1992;Gresseth et al, 2023;Henstra et al, 2023;Jones et al, 2020;Muñoz-Barrera et al, 2021;Provan, 1992;Van der Zwan, 1990). In comparison, the Rogn Formation recorded on the Frøya High has received less attention but has been interpreted to be connected along the strike of the footwall island to ageequivalent deposits in the Draugen Field area (Chiarella et al, 2020;Henstra et al, 2023).…”

“…Seemingly isolated sandbodies of the Rogn Formation are presently identified locally in wells drilled in these uplifted areas (i.e. on the Frøya High and in the immediate footwall of the Vingleia Fault Complex; e.g, wells 6306/6‐1 and 6407/9‐1; Chiarella et al, 2020; Dalland et al, 1988; Elliott et al, 2017; Henstra et al, 2023; Provan, 1992). In the study area, the sandstone‐rich Rogn Formation typically forms coarsening‐upward, heavily bioturbated units, interpreted to be deposited in a shoreface to the offshore‐bar environment (Chiarella et al, 2020; Elliott et al, 2017; Henstra et al, 2023; Provan, 1992; Van der Zwan, 1990); however, the more regional distribution of this enigmatic unit remains poorly constrained, due to limited good coverage, seismic resolution and few regional studies (e.g.…”

“…Isolated sandbodies of the Rogn Formation are documented in the Froan Basin and on the Frøya High (e.g. Chiarella et al, 2020; Goesten & Nelson, 1992; Henstra et al, 2023; Provan, 1992; Van der Zwan, 1990). The formation is an example of a footwall‐sourced syn‐rift depositional system that developed on the back‐tilted footwall of a major normal fault system, providing a rare record of tectonically controlled sediment supply and accommodation generation.…”

“…The formation is an example of a footwall-sourced syn-rift depositional system that developed on the back-tilted footwall of a major normal fault system, providing a rare record of tectonically controlled sediment supply and accommodation generation. Previous studies of Upper Jurassic syn-rift deposits on the Trøndelag Platform have been based on seismicstratigraphic, sedimentological, and biostratigraphic analysis (Chiarella et al, 2020;Elliott et al, 2017Elliott et al, , 2021Henstra et al, 2023;Provan, 1992;Van der Zwan, 1990). In these studies, a shallow marine interpretation for the Rogn Formation is inferred based on seismic and borehole data.…”