Sean Gas Field

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UK Oil & Gas Fields

Shell Oil & Gas Fields

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Summary Information

  • Operator: Shell
  • Country: UK
  • Location: Southern North Sea
  • Production start: 1986
  • Partners: SSE
  • Type: Gas
  • Estimated Reserves:
  • Production Volume:


  • The Sean North, South and Sean East fields are small gas fields located in block 49/25a.
  • They are situated 100 km of the coast of Norfolk in 30m of water
  • The development utilises one manned platform, Sean PP and two unmanned platforms, Sean PD & RD


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  • 1969 - Discovery of Sean Gas Field
  • 1983 - Discovery of Sean East
  • 1984 - Development approval granted for Sean North & South
  • 1986 - Gas production start up
  • 1994 - Approval for Sean East
  • 2012 - BP Announces Sale of Non-Operated Interest in Sean to SSE PLC


  • The reservoir is in the Rotliegend and is sealed by Zechstein evaporites. The reservoir is at a depth of 2560m. The reserves for the fields are 234 BCF (North), 488 BCF (South) and 127 BCF (East). The trap for all of the fields is a dip closure.


  1. List Of Oil and Gas Production Platforms In The UK
  2. BP Announces Sale of Non-Operated Interest in Sean to SSE PLC
  3. An assessment of carbon sequestration potential in the UK – Southern North Sea case study

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