LOWER CRETACEOUS PALYNOLOGY AND SANDSTONE DISTRIBUTION IN THE SCAPA FIELD, U.K. NORTH SEA

1992 ◽  
Vol 15 (1) ◽  
pp. 97-110 ◽  
Author(s):  
L. A. Riley ◽  
S. D. Harker ◽  
S. C. H. Green
Keyword(s):  
North Sea ◽  
Lower Cretaceous

Organic matter characterization of the Lower Cretaceous tight reservoirs in the Danish North Sea

2021 ◽  
Vol 238 ◽  
pp. 103714
Author(s):  
Arka Rudra ◽  
Hamed Sanei ◽  
H.P. Nytoft ◽  
H.I. Petersen ◽  
Carlette Blok ◽  
...  
Keyword(s):  
Organic Matter ◽  
North Sea ◽  
Lower Cretaceous ◽  
Tight Reservoirs

scholarly journals Eocene (Lutetian) Shark-Rich Coastal Paleoenvironments of the Southern North Sea Basin in Europe: Biodiversity of the Marine Fürstenau Formation Including Early White and Megatooth Sharks

2012 ◽  
Vol 2012 ◽  
pp. 1-22 ◽  
Author(s):  
C. G. Diedrich
Keyword(s):  
Central Europe ◽  
North Sea ◽  
Lower Cretaceous ◽  
Marine Mammals ◽  
Fish Fauna ◽  
White Shark ◽  
Benthic Macrofauna ◽  
Northern Germany ◽  
Terrestrial Vertebrates ◽  
Shark Teeth

The Fürstenau Formation (Lutetian, Paleogene, Eocene) is based on type sections near Fürstenau in Germany (central Europe) and is built of 22 meter thick marine glauconitic and strongly bioturbated sands, clays, and a vertebrate-rich conglomerate bed. The conglomerate layer from the Early Lutetian transgression reworked Lower Cretaceous, and Paleogene marine sediments. It is dominated by pebbles from the locally mountains which must have been transported by an ancient river in a delta fan. Marine reworked Lower Cretaceous and Paleogen pebbles/fossils, were derived from the underlying deposits of northern Germany (= southern pre North Sea basin). The benthic macrofauna is cold upwelling water influenced and non-tropical, and medium divers. The vertebrate fish fauna is extremely rich in shark teeth, with about 5,000 teeth per cubic meter of gravel. The most dominant forms are teeth from sand shark ancestors Striatolamia macrota, followed by white shark ancestors Carcharodon auriculatus. Even teeth from the magatooth shark ancestor Carcharocles sokolovi are present in a moderately diverse and condensed Paleogene fish fauna that also includes rays, chimaeras, and more then 80 different bony fish. Fragmentary turtle remains are present, and few terrestrial vertebrates and even marine mammals with phocids, sirenians and possibly whales.

scholarly journals A note on the Early Cretaceous biostratigraphy (foraminifera) of borehole 49/24-1 (Shell/Esso) in the southern North Sea

1984 ◽  
Vol 3 (1) ◽  
pp. 1-10 ◽  
Author(s):  
S. Crittenden
Keyword(s):  
North Sea ◽  
Early Cretaceous ◽  
Lower Cretaceous ◽  
Southern North Sea

Abstract. Borehole 49/24-1 (Shell/Esso), which is the reference borehole for the Lower Cretaceous Cromer Knoll Group in the southern North Sea, is subdivided lithostratigraphically and biostratigraphically. The resulting stratigraphy is briefly compared to onshore U.K. outcrop and borehole sections of comparable age and lithofacies. The regional stratigraphical implications for the correlation of offshore and onshore sections of Lower Cretaceous (Albian) strata are briefly discussed.

The Britannia Field, Blocks 15/29, 15/30, 16/26 and 16/27, UK North Sea

2020 ◽  
Vol 52 (1) ◽  
pp. 664-678 ◽  
Author(s):  
M. Camm ◽  
L. E. Armstrong ◽  
A. Patel
Keyword(s):  
Continental Shelf ◽  
Development Strategy ◽  
North Sea ◽  
Lower Cretaceous ◽  
Near Field ◽  
Field Development ◽  
Infill Drilling ◽  
To Come ◽  
The Uk

AbstractThe Lower Cretaceous Britannia Field development is one of the largest and most significant undertaken on the UK Continental Shelf. Production started in 1998 via 17 pre-drilled development wells and was followed by a decade of intensive drilling, whereby a further 40 wells were added. In 2000 Britannia's plateau production of 800 MMscfgd supplied 8% of the UK's domestic gas requirements.As the field has matured, so too has its development strategy. Initial near-field development drilling targeting optimal reservoir thickness was followed by extended reach wells into the stratigraphic pinchout region. In 2014 a further strategy shift was made, moving from infill drilling to a long-term compression project to maximize existing production. During its 20-year history the Britannia Platform has undergone numerous changes. In addition to compression, production from five satellite fields has been routed through the facility: Caledonia (2003), Callanish and Brodgar (2008), Enochdhu (2015) and Alder (2016). A new field, Finlaggan, is due to be brought through Britannia's facilities in 2020, helping to maximize value from the asset for years to come.As Britannia marks 20 years of production it has produced c. 600 MMboe – surpassing the original ultimate recoverable estimate of c. 570 MMboe – and is still going strong today.

Late Palaeozoic to Early Cenozoic geological evolution of the northwestern German North Sea (Entenschnabel): New results and insights

2014 ◽  
Vol 93 (4) ◽  
pp. 147-174 ◽  
Author(s):  
Jashar Arfai ◽  
Fabian Jähne ◽  
Rüdiger Lutz ◽  
Dieter Franke ◽  
Christoph Gaedicke ◽  
...  
Keyword(s):  
North Sea ◽  
Lower Cretaceous ◽  
Late Jurassic ◽  
Structural Element ◽  
The North ◽  
Sedimentary Evolution ◽  
Basin Subsidence ◽  
The North Sea ◽  
Thickness Variations ◽  
Zechstein Salt

AbstractThe results of a detailed seismic mapping campaign of 13 horizons in the northwestern German North Sea, covering Late Permian to Palaeogene sedimentary successions, are presented. Based on the interpretation of four 3D and two 2D seismic surveys, thickness and depth maps of prominent stratigraphic units were constructed. These maps provide an overview of key structural elements, the sedimentation and erosion, and give insights into the evolution of the German Central Graben. The base of the Zechstein Group reaches a maximum depth of 7800 m within the German Central Graben. Lateral thickness variations in the Zechstein reflect the extensive mobilisation of Zechstein salt. Complex rift-related structures, with the Central Graben as the main structural element, were found not later than the Early Triassic. Up to 3000-m thick Triassic sediments are preserved in the eastern German Central Graben of which 1800 m consist of Keuper sediments. The Lower Buntsandstein unit shows increasing thicknesses towards the southeastern study area, likely related to distinct lateral subsidence. As a consequence of uplift of the North Sea Dome, Middle Jurassic sediments were eroded in large parts of the northwestern German North Sea and are only preserved in the German Central Graben. The NNW–SSE oriented John Basin is another important structural element, which shows maximum subsidence during the Late Jurassic. In most parts of the study area Lower Cretaceous sediments are absent due to either erosion or non-deposition. Lower Cretaceous deposits are preserved in the Outer Rough Basin in the northwest and within the German Central Graben. Upper Cretaceous sediments are found at depths between 1500 and 3600 m, reaching a maximum thickness of approximately 1600 m on the Schillgrund High. Contraction and inversion of pre-existing Mesozoic faults during the Late Cretaceous is distinct at the Schillgrund Fault, i.e. the eastern border fault of the Central Graben. The Palaeogene is predominantly a period of strong basin subsidence. Within 37 Myrs, up to 1400 m of Palaeogene sediments were deposited in the northwesternmost part of the study area. Detailed mapping of salt structures enables a reconstruction of halokinetic movements over time and a deciphering of the influence of the Zechstein salt on the sedimentary evolution during the Mesozoic and Cenozoic. Increasing sediment thicknesses in rim-synclines indicate that most of the salt structures in the German Central Graben had their main growth phase during the Late Jurassic.

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