Carbon Dioxide Storage with Impurities in the UK Southern North Sea

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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