Endeavour Announces Agreement of Rochelle Commercial Terms

HOUSTON, April 18, 2011 - Endeavour International Corporation (NYSE: END) (LSE: ENDV) today
announced agreement of commercial terms for the processing and transportation
of East Rochelle production on the Scott Platform, in the Central North Sea.
Endeavour, operator of the East Rochelle, plans to award contracts and
commence construction of the production facilities immediately.

"This represents an important milestone in the development of the East
Rochelle field," said William L. Transier, chairman, chief executive officer
and president. "Endeavour can now move forward expeditiously to achieve first
production in 2012. This off-take solution is expected to incorporate the
production at West Rochelle, the second phase of the development of the
Greater Rochelle area, which will be on a simultaneous track with East
Rochelle."

The Field Development Plan for East Rochelle was approved by the
Department of Energy and Climate Change in February 2011. The plan calls for
the subsea development to be linked by a 30- kilometer pipeline to production
facilities on the Scott platform. First production from East Rochelle is
planned for the second half of 2012. Endeavour holds a 55.6 percent working
interest in the East Rochelle development and Nexen Petroleum UK Limited
holds the remaining 44.4 percent interest.

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