Cygnus gas field
| Cygnus gas field | |
|---|---|
| Country | United Kingdom |
| Region | North Sea |
| Location/blocks | 44/11a, 44/12a |
| Offshore/onshore | Offshore |
| Coordinates | 54°34’14”N 02°17’28”E |
| Operator | Neptune E&P UK Ltd |
| Owner | Spirit Energy (61.25 %) and Neptune Energy (38.75 %) |
| Field history | |
| Discovery | 1988 |
| Start of production | December 2016 |
| Production | |
| Recoverable gas | 760×109 cu ft (22×109 m3) |
| Producing formations | Permian sandstones, Carboniferous |
The Cygnus gas field is a natural gas reservoir and gas production facilities in the UK sector of the southern North Sea. It is about 150 km of east of the Lincolnshire coast and started gas production in 2016.
The field
The Cygnus field extends over UK offshore Blocks 44/11a and 44/12a. The field was discovered in 1988 by Marathon Oil.[1] The reservoirs are Permian Leman sandstone and Carboniferous sandstone formations and have recoverable reserves of 760 billion cubic feet.[1]
In 2019 the Cygnus gas field was jointly owned by Spirit Energy (61.25 %) and Neptune Energy (38.75 %), Neptune E&P UK Ltd operates the infrastructure.[1]
Production from the field has been developed in stages. In the first stage gas was produced by wells on the Cygnus Alpha platform and then routed by pipeline to the Bacton Gas Terminal via the Esmond Transmission System.[1] The next stage entailed development of the north west part of the field produced from the Cygnus Bravo platform which was routed 7 km to the Cygnus Alpha installation.[1]
Details of the Cygnus field infrastructure are as shown.[1][2][3][4]
| Platform name | Cygnus A WHP | Cygnus A PU | Cygnus A QU | Cygnus B |
|---|---|---|---|---|
| Block | 44/11a | 44/11a | 44/11a | 44/12a |
| Installation type | Fixed Steel platform | Fixed Steel platform | Fixed Steel platform | Fixed Steel platform |
| Coordinates | 54°36’36”N 02°22’29”E | 54°34’14”N 02°17’28”E | 54°34’12”N 02°17’23”E | 54°35’59”N 02°11’46”E |
| Function | Wellheads | Processing and utilities | Accommodation and utilities | Wellheads |
| Crew | 66 | Unattended | ||
| First gas | December 2016 | August 2017 | ||
| Water depth, metres | 22.5 | 22 | 21.7 | 22 |
| Design | AMEC | |||
| Jacket fabrication | BiFab Methil | |||
| Jacket weight, tonnes | 1,858 | 3,146 | 1,958 | 2,194 |
| Topside fabrication | Heerema Hartlepool | BiFab | Heerema Hartlepool | |
| Topsides dimensions, metres | 23 x 23 x 10 | |||
| Topsides weight, tonnes | 1,474 | 3,911 | 2,960 | 2,753 |
| No. of legs | 4 | 8 | 4 | |
| No. of well slots | 10 | – | – | 10 |
| No. of Wells | – | – | ||
| Production to | Cygnus APU across bridge | Bacton via Esmond system | – | Cygnus A PU |
| Production capacity | 320 MMSCFD | – | ||
| Pipeline length and diameter | – | 50 km, 565 mm | – | 7.28 km, 10-inch |
| Pipeline Number | – | PL3088 | – | PL3086 |
See also
- Bacton gas terminal
- List of oil and gas fields of the North Sea
- Esmond, Forbes and Gordon gas fields
- Tyne, Trent and Tors gas fields
References
- ^ a b c d e f "Cygnus gas field development". www.nsenergybusiness.com. Retrieved 22 December 2021.
{{cite web}}: CS1 maint: url-status (link) - ^ "Cygnus". www.spirit-energy.com. Retrieved 22 December 2021.
{{cite web}}: CS1 maint: url-status (link) - ^ "Inventory of Offshore Installations". odims.ospar.org. Retrieved 22 December 2021.
{{cite web}}: CS1 maint: url-status (link) - ^ "OGA interactive Maps". ogauthority.maps.arcgis.com. Retrieved 22 December 2021.
{{cite web}}: CS1 maint: url-status (link)