Tektonisk-sedimentære egenskaper av øvre jura sedimentære bergarter i Fenja-området, Norskehavet
Abstract
This study focuses on enhancing the understanding of the relationship of normal fault and Upper Jurassic sandstone deposits in the Fenja area, situated within the Norwegian Sea. Utilizing data from three wells (6406/11-1 S, 6406/12-1 S and 6406/12-2) and a 3D seismic cube, the investigation aims to locate sandstone deposits and interpret the associated depositional systems.The geological setting of the study area, characterized by its location in a marine depositional environment, presents a complex interaction of tectonic and sedimentary processes. Through structural and stratigraphic correlations, as well as seismic interpretation, sandstone deposits are recognized and correlated across wells, each exhibiting unique depositional characteristics.In well 6406/11-1-S, Upper Jurassic formations are absent. In contrast, well 6406/12-1 S showcased Upper Jurassic sandstone in the Rogn Formation was deposited in a shoreface environment. Notably, well 6406/12-2 revealed sandstone deposits within the Rogn Formation, suggesting a submarine fan depositional system.Seismic interpretation and geological mapping revealed two major boundary faults within the study area, influencing sedimentation patterns and depositional environments. This study contributes to the broader interpretation of the Norwegian Sea´s geological dynamics, bridging knowledge gaps and providing insights into the Upper Jurassic depositional environments and fault systems. The findings underscore the significance of integrated geological analysis for enhancing understanding of rift basin formations and informing future exploration efforts in Upper Jurassic oil and gas reservoirs. This study focuses on enhancing the understanding of the relationship of normal fault and Upper Jurassic sandstone deposits in the Fenja area, situated within the Norwegian Sea. Utilizing data from three wells (6406/11-1 S, 6406/12-1 S and 6406/12-2) and a 3D seismic cube, the investigation aims to locate sandstone deposits and interpret the associated depositional systems.The geological setting of the study area, characterized by its location in a marine depositional environment, presents a complex interaction of tectonic and sedimentary processes. Through structural and stratigraphic correlations, as well as seismic interpretation, sandstone deposits are recognized and correlated across wells, each exhibiting unique depositional characteristics.In well 6406/11-1-S, Upper Jurassic formations are absent. In contrast, well 6406/12-1 S showcased Upper Jurassic sandstone in the Rogn Formation was deposited in a shoreface environment. Notably, well 6406/12-2 revealed sandstone deposits within the Rogn Formation, suggesting a submarine fan depositional system.Seismic interpretation and geological mapping revealed two major boundary faults within the study area, influencing sedimentation patterns and depositional environments. This study contributes to the broader interpretation of the Norwegian Sea´s geological dynamics, bridging knowledge gaps and providing insights into the Upper Jurassic depositional environments and fault systems. The findings underscore the significance of integrated geological analysis for enhancing understanding of rift basin formations and informing future exploration efforts in Upper Jurassic oil and gas reservoirs.