LOWER CRETACEOUS LITHOSTRATIGRAPHY NE OF THE SOLE PIT AREA IN THE UK 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.

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

Geological Society London Memoirs ◽

10.1144/m52-2018-54 ◽

2020 ◽

Vol 52 (1) ◽

pp. 664-678 ◽

Cited By ~ 1

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.

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The Hewett Field, Blocks 48/28a, 48/29a, 48/30a, 52/4a and 52/5a, UK North Sea

Geological Society London Memoirs ◽

10.1144/m52-2019-40 ◽

2020 ◽

Vol 52 (1) ◽

pp. 189-202 ◽

Cited By ~ 2

Author(s):

J. A. Hook

Keyword(s):

Fault Zone ◽

North Sea ◽

Structural Evolution ◽

Field Development ◽

Southern North Sea ◽

Sandstone Formation ◽

The Uk ◽

Basin Margin ◽

Sour Gas

AbstractThe Hewett Field has been in production for some 50 years. Unusually for a Southern North Sea field in the UK Sector, there has been production from several different reservoirs and almost entirely from intervals younger than the principal Leman Sandstone Formation (LSF) reservoir in the basin. Some of these reservoirs are particular to the Hewett area. This reflects the location of the field at the basin margin bound by the Dowsing Fault Zone, which has influenced structural evolution, deposition and the migration of hydrocarbons. The principal reservoirs are the Permo-Triassic Hewett Sandstone (Lower Bunter), Triassic Bunter Sandstone Formation (BSF) (Upper Bunter) and Permian Zechsteinkalk Formation. There has also been minor production from the Permian Plattendolomit Formation and the LSF. Sour gas is present in the BSF only. Several phases of field development are recognized, ultimately comprising three wellhead platforms with production from 35 wells. Gas is exported onshore to Bacton, where the sour gas was also processed. Peak production was in 1976 and c. 3.5 tcf of gas has been recovered. Hewett has also provided the hub for six satellite fields which have produced a further 0.9 tcf of gas. It is expected that the asset will cease production in 2020.

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The Pickerill Field, Blocks 48/11a, 48/11b, 48/12c, 48/17b, UK North Sea

Geological Society London Memoirs ◽

10.1144/gsl.mem.2003.020.01.67 ◽

2003 ◽

Vol 20 (1) ◽

pp. 799-809 ◽

Cited By ~ 1

Author(s):

O. C. Werngren ◽

D. Manley ◽

A. P. Heward

Keyword(s):

North Sea ◽

High Angle ◽

Gas Accumulation ◽

Southern North Sea ◽

The Uk ◽

Geological Complexity

AbstractThe Pickerill Field is a dry gas accumulation straddling four separate licences in the UK Southern North Sea. Discovered in 1984, 12 appraisal wells were drilled to define the field before Annex B approval in 1989. Subsequently, Pickerill has been developed using 15 high angle wells, a large number of which have been sidetracked reflecting the geological complexity of the accumulation. Pickerill has been in production since August 1992, and has an estimated initial reserves in excess of 500 BCF.

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Movements and distribution of cod (Gadus morhua) in the southern North Sea and English Channel: results from conventional and electronic tagging experiments

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315407054641 ◽

2007 ◽

Vol 87 (2) ◽

pp. 599-613 ◽

Cited By ~ 50

Author(s):

David Righton ◽

Victoria Anne Quayle ◽

Stuart Hetherington ◽

Gary Burt

Keyword(s):

North Sea ◽

Gadus Morhua ◽

Atlantic Cod ◽

English Channel ◽

Seasonal Movement ◽

Southern North Sea ◽

The North ◽

Fisheries Policy ◽

The Uk ◽

Electronic Tags

The sub-structure of Atlantic cod (Gadus morhua) stocks in the North Sea has important consequences for fisheries management as the Common Fisheries Policy moves towards a more regional approach. We investigated the movements, distribution and behaviour of cod in the southern North Sea (ICES IVc) and English Channel (ICES VIId) by re-analysing historic data from conventional tagging experiments, and by conducting new experiments with electronic tags. Cod tagged and released in IVc showed a northwards shift in distribution during the feeding season consistent with a homing migration away from spawning grounds along the coasts of the UK and the Netherlands. In contrast, cod tagged and released in VIId did not exhibit a consistent pattern of seasonal movement. Many cod released in VIId were subsequently recaptured close to their release position, although some moved out of the Channel and into the southern North Sea. Overlap between the recapture areas of cod released in the different management areas was no more than 25% in either the spawning or feeding season. Behavioural data from electronic tags suggest that cod in IVc make use of tidal streams to migrate northwards and eastwards in spring, whereas selective tidal stream transport was rarely exhibited by cod tagged and released in VIId. Overall, the evidence suggests that there are behavioural differences between cod in IVc and VIId that limit the mixing of cod from these two areas during the feeding and spawning seasons.

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