The Cygnus development consists of four platforms including two drilling centres which target a total of 10 wells.
The central Alpha complex consists of three bridge linked platforms: a wellhead drilling centre; a processing and utilities unit; and a living quarters with the central control room. The Bravo location is approximately 7km North West of Alpha and is an unmanned satellite wellhead platform.
The Cygnus reservoir comprises sandstones of the Permian Leman Sandstone Formation and Carboniferous Ketch Formation. Cygnus holds estimated 2P (proved and probable) reserves of approximately 110mmboe (million barrels of oil equivalent).
Cygnus came on stream in December 2016 and contributes 5% to the UK gas production, supplying gas to the equivalent of 1.5 million homes in the UK. The field life is approximately 20 years. This excludes any future potential developments and tie-ins.
The Cygnus gas field was first discovered in 1988. Further appraisal activity ceased until 2002 when a group led by ENGIE E&P UK Ltd were awarded the licence in the 20th round. Subsequent subsurface data analysis, innovative geological thinking and leading-edge geophysics enabled this discovery to become the largest gas field development in the Southern North Sea in over 25 years. The Cygnus development was sanctioned in 2012, following the UK Government’s decision to introduce a field allowance for new large gas fields in shallow water.
Gas Transportation: Gas is exported via a 55km pipeline connecting Cygnus to the Esmond Transmission System (ETS) pipeline, which terminates at Bacton in Norfolk in the UK
Location: The field is located in the UK Southern North Sea Blocks 44/11 and 44/12, in licence areas P1055 & P1731, some 150km off the coast of Lincolnshire
Production Start: 13 December 2016
Partners: ENGIE E&P UK Limited (38.75%, Operator), Centrica (48.75%), Bayerngas (12.5%)