Deep-marine sediments in the Norwegian Sea have during the last decade become increasingly import... more Deep-marine sediments in the Norwegian Sea have during the last decade become increasingly important in exploration, and recently also in reservoir production. Several exploration wells have been drilled during the last few years discovering thick intervals of sandrich deep-marine sediments of Late Cretaceous and Paleocene age. The reservoir quality of the sandstones is variable and difficult to predict because of the variation in facies, a generally deeply buried setting and variable temperature history.
The giant Ormen Lange Gas Field is situated in the Møre Basin, Norwegian Sea, at water depths aro... more The giant Ormen Lange Gas Field is situated in the Møre Basin, Norwegian Sea, at water depths around 1000 m. The reservoir interval consists of a lower heterolithic unit mainly of Maastrichtian age (Jorsalfare Formation) and an upper sandstone unit of Danian age (Egga Member, Våle Formation), separated by a widely distributed mudstone unit (‘Våle Tight’), and consists of both high and low density turbidites in association with fine-grained background sediments. The reservoir interval spans the Cretaceous–Tertiary boundary, without any major stratigraphic breaks. The main architectural elements of the reservoir are: channel-dominated deposits, channelized lobe deposits and non-channelized frontal splay or fan fringe deposits. The spatial distribution of these facies elements indicates a dynamic system with changing sediment supply through time. Core and log studies from the wells have been integrated with high-resolution biostratigraphy to develop a dynamic depositional model.During ...
... A. Guy Plint. Ole J. Martinsen 1 ,; John D. Collinson 2 ,; Brian K. Holdsworth 3. Published O... more ... A. Guy Plint. Ole J. Martinsen 1 ,; John D. Collinson 2 ,; Brian K. Holdsworth 3. Published Online: 8 APR 2009. ... New research, based on detailed fieldwork in the Askrigg Block and Craven Basin area, has led to a reinterpretation of Millstone Grit cyclothem stratigraphy. ...
... Ian Kane is a postdoctoral research fellow at the University of Leeds, with interests in proc... more ... Ian Kane is a postdoctoral research fellow at the University of Leeds, with interests in process sedimentology and sedimentary geology, which he investigates using a combination of outcrop and physical modeling approaches. He received a B.Sc. ...
Innovative seismic forward modeling is used to illustrate the sensitivity within seismic data, an... more Innovative seismic forward modeling is used to illustrate the sensitivity within seismic data, and its application in the interpretation of onlap and pinch-out of terminating deep-water sandstones, two critical components in deep-water exploration and production. Sandstone quality, net-to-gross estimates, volume calculations, vertical connectivity, and stratigraphic trapping are all dependent on the sandstone extent and their seismic characteristics in these settings. However, seismic resolution is commonly insufficient to resolve the critical reservoir parameters. Seismic modeling of termination styles based on integrated outcrop and subsurface properties allows for depth- and resolution-focused predictive models to be built for improved subsurface analysis. This technique is currently underused as a method to better understand the sensitivity of seismic data to the target lithologies and their geometries. The Gres d'Annot Formation is a well-studied sand-prone deep-water system of Paleogene age, deposited in a bathymetrically complex setting. Six end-member termination styles are discussed, including three sand-prone styles—simple onlap (O s), draping onlap (O d), and bed thickening (O t)—and three heterolithic styles—advancing pinch-out (P a), convergent pinch-out (P c), and convergent thickening and pinch-out (P ct). Local thickening close to the system margins is common in both sand-prone and heterolithic terminating strata and plays an important function in the appropriate distribution of sandstone. The outcrops are interpreted as potential (process) analogs for the complex sandstone distribution and termination patterns observed in plays like the Paleogene of the Gulf of Mexico and the Jurassic of the northern North Sea.
Deep-marine sediments in the Norwegian Sea have during the last decade become increasingly import... more Deep-marine sediments in the Norwegian Sea have during the last decade become increasingly important in exploration, and recently also in reservoir production. Several exploration wells have been drilled during the last few years discovering thick intervals of sandrich deep-marine sediments of Late Cretaceous and Paleocene age. The reservoir quality of the sandstones is variable and difficult to predict because of the variation in facies, a generally deeply buried setting and variable temperature history.
The giant Ormen Lange Gas Field is situated in the Møre Basin, Norwegian Sea, at water depths aro... more The giant Ormen Lange Gas Field is situated in the Møre Basin, Norwegian Sea, at water depths around 1000 m. The reservoir interval consists of a lower heterolithic unit mainly of Maastrichtian age (Jorsalfare Formation) and an upper sandstone unit of Danian age (Egga Member, Våle Formation), separated by a widely distributed mudstone unit (‘Våle Tight’), and consists of both high and low density turbidites in association with fine-grained background sediments. The reservoir interval spans the Cretaceous–Tertiary boundary, without any major stratigraphic breaks. The main architectural elements of the reservoir are: channel-dominated deposits, channelized lobe deposits and non-channelized frontal splay or fan fringe deposits. The spatial distribution of these facies elements indicates a dynamic system with changing sediment supply through time. Core and log studies from the wells have been integrated with high-resolution biostratigraphy to develop a dynamic depositional model.During ...
... A. Guy Plint. Ole J. Martinsen 1 ,; John D. Collinson 2 ,; Brian K. Holdsworth 3. Published O... more ... A. Guy Plint. Ole J. Martinsen 1 ,; John D. Collinson 2 ,; Brian K. Holdsworth 3. Published Online: 8 APR 2009. ... New research, based on detailed fieldwork in the Askrigg Block and Craven Basin area, has led to a reinterpretation of Millstone Grit cyclothem stratigraphy. ...
... Ian Kane is a postdoctoral research fellow at the University of Leeds, with interests in proc... more ... Ian Kane is a postdoctoral research fellow at the University of Leeds, with interests in process sedimentology and sedimentary geology, which he investigates using a combination of outcrop and physical modeling approaches. He received a B.Sc. ...
Innovative seismic forward modeling is used to illustrate the sensitivity within seismic data, an... more Innovative seismic forward modeling is used to illustrate the sensitivity within seismic data, and its application in the interpretation of onlap and pinch-out of terminating deep-water sandstones, two critical components in deep-water exploration and production. Sandstone quality, net-to-gross estimates, volume calculations, vertical connectivity, and stratigraphic trapping are all dependent on the sandstone extent and their seismic characteristics in these settings. However, seismic resolution is commonly insufficient to resolve the critical reservoir parameters. Seismic modeling of termination styles based on integrated outcrop and subsurface properties allows for depth- and resolution-focused predictive models to be built for improved subsurface analysis. This technique is currently underused as a method to better understand the sensitivity of seismic data to the target lithologies and their geometries. The Gres d'Annot Formation is a well-studied sand-prone deep-water system of Paleogene age, deposited in a bathymetrically complex setting. Six end-member termination styles are discussed, including three sand-prone styles—simple onlap (O s), draping onlap (O d), and bed thickening (O t)—and three heterolithic styles—advancing pinch-out (P a), convergent pinch-out (P c), and convergent thickening and pinch-out (P ct). Local thickening close to the system margins is common in both sand-prone and heterolithic terminating strata and plays an important function in the appropriate distribution of sandstone. The outcrops are interpreted as potential (process) analogs for the complex sandstone distribution and termination patterns observed in plays like the Paleogene of the Gulf of Mexico and the Jurassic of the northern North Sea.
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