Mantra well result offshore Norway

RNS Number : 2886W

Tullow Oil PLC

24 December 2013

News Release

24 December 2013 - Tullow Oil plc (Tullow) announces that the 31/3-4 exploration well on the Mantra prospect offshore Norway has encountered reservoir quality sands but all intervals are water wet.

The 31/3-4 wildcat was the first exploration well in the Tullow operated 551 production licence and was targeting the Upper Jurassic Sognefjord Formation reservoir as the main target, with additional prospectivity in Paleocene Lista sands and Middle Jurassic Brent Group.

The semi-submersible drilling rig Transocean Barents drilled 31/3-4 to a vertical depth of approximately 2,082 metres subsea before it was terminated in the Middle Jurassic Brent Group.

The well, located approximately 10km north of the Troll C platform in the North Sea, will now be logged before being plugged and abandoned.

Tullow holds an 80% working interest in the 551 production licence and is partnered by Det Norske (20% interest).

FOR FURTHER INFORMATION CONTACT:

Tullow Oil plc

(London)
(+44 20 3249 9000)
Chris Perry (Investor Relations)

James Arnold (Investor Relations)

George Cazenove (Media Relations)

Citigate Dewe Rogerson

(London)
(+44 207 638 9571)
Martin Jackson

Priscilla Garcia

Murray Consultants
(Dublin)

(+353 1 498 0300)
Ed Micheau

Joe Heron

First House

(Oslo)

(+47 908 79 108)

Geir Gjervan

Notes to Editors

Tullow Oil plc

Tullow is a leading independent oil & gas, exploration and production group, quoted on the London, Irish and Ghanaian stock exchanges (symbol: TLW) and is a constituent of the FTSE 100 Index. The Group has interests in over 150 exploration and production licences across 25 countries which are managed as three regional business units: West & North Africa, South & East Africa and Europe, South America and Asia.

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