Katy Gas Field

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Summary Information

  • Operator: ConocoPhillips
  • Country: UK
  • Location: Southern North Sea
  • Production start: 2013
  • Partners: GDF Suez, Tullow
  • Type: Gas
  • Estimated Reserves:
  • Production Volume:


  • The Katy Field development will consist of a single production well, the installation of a Normally Unattended Installation (NUI), the installation of two subsea protection structures (a Tee assembly at Katy and a pigging manifold at Kelvin) and a new 14 km 10” gas production pipeline with a piggy-backed 2” methanol pipeline.
  • The pipeline will connect the Katy platform to the existing Kelvin Subsea Tee, which is tied-back to the Murdoch Complex.
  • Commingled gas from Katy and other connected fields will be exported from the Murdoch Complex to the Theddlethorpe Gas Terminal via the CMS pipeline system.


  • Wilton Engineering: Fabrication of all subsea structures, including the two large structures: a 59-tonne tee and a 73-tonne pigging manifold
  • Seaway Heavy Lifting: Transportation & Installation of Jacket & Piles and Topsides
  • KWSubsea: Detailed design of 14km 10" gas production and 2" methanol piggyback pipelines, associated tie-in spoolpieces, 100T Kelvin Pigging Manifold Assembly and Katy Future 60T Tie-in Assembly
  • Nessco: Communications Systems


  • 2012 - Project development approved by UK Government
  • 2013 - First gas produced



  1. Seaway Heavy Lifting Oil And Gas References
  2. KWSubsea Subsea References
  3. Nessco Platform References
  4. Wilton Engineering Completes Saipem Contract

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