Endeavour Announces Commencement of Drilling Operations on Tudor Rose

By Endeavour International Corporation, PRNE
Wednesday, November 16, 2011

HOUSTON, November 17, 2011 -

Endeavour International Corporation (NYSE: END) (LSE: ENDV) today announced that the Tudor Rose well in the Central North Sea block 14/30a was spud on the 16th of November 2011.

The Tudor Rose oil accumulation was discovered in 1983 and encountered an 80 foot oil column within the Tertiary age Beauly Sands, but proper representative oil samples were not obtained. Latest analysis indicates that the accumulation contains over 500 mmbbls of oil in-place.  The current well is being drilled 2.5 kilometers from, and at a similar elevation to the discovery well, with the primary objective of establishing the gravity and viscosity of the oil through proper testing. The well is expected to be drilled to approximately 3,500 feet using the Transocean Sedco 704 semi-submersible rig. Drilling is anticipated to take approximately 20-30 days to complete subject to weather conditions and operational requirements.

Endeavour has a 20% working interest in the field which is operated by EnCore Oil plc.

Endeavour International Corporation is an oil and gas exploration and production company focused on the acquisition, exploration and development of oil and natural gas in the North Sea and the United States. For more information, visit www.endeavourcorp.com.


Endeavour - Investor Relations, Mike Kirksey, +1-713-307-8788, or Darcey Matthews, +1-713-307-8711, or Pelham Bell Pottinger - UK Media, Philip Dennis, +44(0)207-861-3919, or Henry Lerwill, +44(0)207-861-3169

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