Endeavour Announces Successful Discovery in West Rochelle

HOUSTON, October 28, 2010 - Endeavour International Corporation (NYSE Amex: END) (LSE: ENDV) today
announced a successful discovery in the West Rochelle area of the North Sea.

The West Rochelle well was spudded on 3rd September and reached a total
depth of 10,787ft on 7th October, encountering natural gas with an oil rim in
an excellent quality reservoir similar to that discovered at Rochelle. The
well is currently being sidetracked to the north in order to further appraise
the extent of reservoir. Updates will be provided as more information on the
field becomes available.

The Greater Rochelle area is comprised of three blocks in the North Sea -
15/26b, 15/26c and 15/27. Endeavour holds a 55.6 percent interest and is the
operator in block 15/27 with its partner Nexen Petroleum U.K. Limited and has
a 50% working interest and operatorship of 15/26c. Nexen and Premier Oil plc
have each farmed into block 15/26c for 25% working interest.

William L. Transier, chairman, chief executive officer and president
said:

"This discovery in West Rochelle provides further evidence that the
Rochelle area is a significant hydrocarbon region. The quality technical work
and drilling operations by our team and partners continues to expand the
reserves and economic impact of the entire Rochelle area. This represents
another addition to reserves for our company and underscores the strength of
our exploration team."

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

Certain statements in this news release should be regarded as
"forward-looking" statements within the meaning of the securities laws. These
statements speak only as of the date made. Such statements are subject to
assumptions, risk and uncertainty. Actual results or events may vary
materially. The estimates of recoverable resources per well and completed
well costs included herein are based upon other typical results in these
shale plays and may not be indicative of actual results.

Investor Relations, Mike Kirksey, +1-713-307-8788, or Darcey Matthews, +1-713-307-8711, both of Endeavour; or UK Media, Philip Dennis, +44(0)20-7337-1516, or Henry Lerwill, +44(0)20-7337-1526, both of Pelham Bell Pottinger