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Brigantine, Caravel, Corvette and Shamrock gas fields

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Corvette gas field
CountryUnited Kingdom
RegionSouthern North Sea
Location/blocks49/24
Offshore/onshoreOffshore
Coordinates53.231944N 2.622778E
OperatorShell
OwnerShell Esso
Field history
Discovery1996
Start of production1999
Production
Recoverable gas211×10^9 cu ft (6.0×10^9 m3)
Producing formationsRotliegendes

The Brigantine, Caravel, Corvette and Shamrock fields are natural gas reservoirs and gas production facilities in the southern North Sea, close to the UK/Netherlands median line. The fields have produced natural gas since 1999.

The fields

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The Brigantine, Caravel, Corvette and Shamrock gas fields are located in the adjacent UK Offshore Blocks 49/19, 49/20 and 49/24. Brigantine, Caravel and Corvette follow Shell’s convention of naming southern North Sea fields after types of sailing vessels. Brigantine has four gas accumulations designated A-D. The gas reservoirs have the following characteristics.[1] [2] [3] [4]

Reservoir characteristics
Reservoir Brigantine A Brigantine B Brigantine C Brigantine D Shamrock Caravel Corvette
Block 49/19 49/19 49/19 49/19 49/20a 49/20 49/24
Year discovered 1986 1997 1998 2001 1971 2002 1996
Gas reservoir Rotliegend Rotliegend
Gas reserves 280 billion cubic feet or 10 billion cubic metres 211 bscf

Development

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The gas producing capability of the fields was realised through five offshore platforms, their characteristics are summarised in the table.[5] [1] [6] [7]##2 1 3 7

Installation characteristics
Installation Brigantine BR Brigantine BG Shamrock QS Caravel QR Corvette CV
Block 49/19 49/19 49/20a 49/20a 49/24
Coordinates 53.442744 2.698202 53.402498 2.656400 53.495192 2.974531 53.542131 3.025706 53.231944 2.622778
Water depth, m 29 29 29 30 29
Owner Shell Shell Shell Shell Shell
Type Fixed steel Fixed steel Monotower Monotower Fixed steel
Substructure weight, tonnes 360 394 180 270 910
Topsides weight, tonnes 152 162 270 180 970
Production start 2001 2001 2008 2008 1999
Production export (by pipeline) to Brigantine BG Corvette CV Caravel QR Corvette CV Leman A complex
Export pipeline, length and diameter 5.4 km, 20” 19.6 km, 20” 4.95 km, 16” 33.3 km, 16” 36.6 km, 20”

Production

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Gas production from the fields is summarised in the table.[1] Gas from these installations flows to the Leman A complex and from there to the Bacton gas terminal.

Gas production
Reservoir Brigantine A Brigantine B Brigantine C Brigantine D Shamrock Caravel Corvette
Production start 2001 2001 2002 2003 2008 2008 1999
Peak production, mcm/y 639 573 655 35 411 873 1,782
Peak year 2003 2001 2003 2006 2010 2011 1999
Cumulative production, mcm/y 2,673 1,561 2,247 90 1,137 2,568 4,780
End of production 2008 2008 2008 2008 2009

The production profile, in mcm/y, of the Corvette field was as shown.[1]

See also

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References

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  1. ^ a b c d "Oil and Gas UK – Field data". www.gov.uk. Archived from the original on 2015-10-27. Retrieved 8 December 2021.
  2. ^ "The Corvette field". mem.lyellcollection.org. Archived from the original on 2021-12-08. Retrieved 8 December 2021.
  3. ^ "Brigantine field development gets green light". www.ogj.com. 19 July 2000. Archived from the original on 2021-12-08. Retrieved 8 December 2021.
  4. ^ "England's Historic Seascapes: Withernsea to Skegness". archaeologydataservice.ac.uk. Archived from the original on 2021-12-08. Retrieved 8 December 2021.
  5. ^ "Inventory of Offshore Installations". odims.ospar.org. Archived from the original on 2021-11-25. Retrieved 8 December 2021.
  6. ^ "OGA interactive Maps". ogauthority.maps.arcgis.com. Archived from the original on 2019-01-26. Retrieved 8 December 2021.
  7. ^ "Stanardised monotowers". hsmoffshoreenergy.com. Archived from the original on 2021-12-08. Retrieved 8 December 2021.
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