Geology and history

Geology

• The field, located in the Central Graben, has a gas cap.
• Reservoir:  Palaeocene sands.
• Trap:  structural closure.
• High quality oil.

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Development facilities

• Enoch was developed as a subsea tieback to the Marathon-operated Brae A platform located in the UK continental shelf (some 15km to the northwest).
• Production is by means of a single, extended length horizontal well with gas lift capability.
• Oil production is exported via the Forties pipeline network.

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History

• In 1999, ROC purchased oil and gas assets in the UK North Sea, including a 15% interest in the licence containing the UK portion of the Enoch Oil and Gas Field.
• The field extends into the Norwegian sector and is unitised.  ROC holds a 12% interest in the unitised field.
• A Field Development Plan was submitted in May 2005 and Government sanction received in July 2005.  A Unitisation and Unit
  Operating Agreement was finalised in July 2005.
• The single development well, 16/13a-G, was drilled in Q3 2006.  On production test, the well recorded several flow rates on various choke sizes generally in line with expectations.
• Pipelaying for the flowline to the Brae platform and topsides construction were completed in late 2006 / early 2007.
• Production commenced on 31 May 2007.

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JV participants and interests

Roc Oil (GB) Limited	12.00%
Talisman North Sea Limited (Operator)	24.00%
Talisman LNS Limited	1.20%
Dyas UK Limited	14.00%
Dana Petroleum (BVUK) Limited	12.00%
Dana Petroleum (E&P) Ltd	8.80%
Endeavour Energy UK Limited	8.00%
Statoil Hydro ASA	11.78%
Noreco ASA	4.36%
NOIL Energy ASA	2.00%
DONG E&P Norge AS	1.86%