Endeavour Announces Approval of the Rochelle Field Development Plan

HOUSTON, February 28, 2011 - Endeavour International Corporation (NYSE Amex: END) (LSE: ENDV) is
pleased to announce the United Kingdom Department of Energy and Climate
Change (DECC) has approved the Rochelle Field Development Plan (FDP) for
Block 15/27 in the Central North Sea, now known as East Rochelle. This
approval represents phase one of the development of the Greater Rochelle
area.

"This is a significant accomplishment in the Rochelle Field Development.
We are very pleased that the DECC has shown their confidence in Endeavour's
operating capability and approved our plan so we can move prudently toward
first production at East Rochelle next year," said William L. Transier,
chairman, chief executive officer and president. "With the added discovery
announced in October 2010, we plan to integrate West Rochelle into this
development plan, as phase two, with production estimated to begin in 2012."

Endeavour is operator of East Rochelle and holds a 55.6 percent working
interest in the development. Nexen Petroleum UK Limited holds the remaining
44.4 percent interest. The current FDP calls for the subsea development to be
linked by a 30 kilometer pipeline to production facilities on the Scott
Platform. First production is planned for the second half of 2012.

Endeavour International Corporation is an international 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 of as of the date made. Such statements are subject to
assumptions, risk and uncertainty. Actual results or events may vary
materially.

Endeavour - Investor Relations, Mike Kirksey, +1-713-307-8700, or Darcey Matthews, +1-713-807-8711; or Pelham Public Relations - UK Media, Philip Dennis, -+44 (0) 207 861 3919, or Henry Lerwill, +44 (0) 203 861 3169