Type:
Gas
Facility:
Production
Water Depth:
22.5
Installed:
2012
meters
Block:
44/11a
Design:
Fixed steel
Sub Structure:
1858
Topsides Wgt:
1474
tonnes
tonnes
Intro
Cygnus A Wellhead Platform is a fixed steel wellhead structure forming part of the Cygnus Alpha complex in the Cygnus gas field, UK Southern North Sea. Installed before first production in 2016, it gathers gas from Permian and Carboniferous reservoirs for processing.
Field
The Cygnus gas field lies ~150-km offshore Lincolnshire in blocks 44/11a and 44/12a, with Permian Leman and Carboniferous sandstone reservoirs. Brought onstream in 2016, it supplies gas to the UK market via pipeline to Bacton.
Facilities
The A wellhead platform hosts multiple well slots (typically ~10) drilled into the Cygnus reservoir. It is one of three bridge-linked platforms at Cygnus Alpha; fluids are routed to the adjacent processing/utilities and quarters platforms where dehydration, compression, and conditioning occur before export. Wellhead equipment includes Xmas trees, flow control and safety valves, and chemical injection points for hydrate control. Integration with processing and quarters platforms provides centralized control and utility services. Power is provided via platform generators supporting control systems and safety functions. Export gas is delivered through a 55-km pipeline to the Esmond Transmission System and onshore reception at Bacton. Emergency shutdown and fire & gas systems are networked across the Alpha complex, with remote monitoring from onshore control centers.
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