Exhibit 99.1

Endeavour Awarded Nine Licenses in U.K. Licensing Round

    HOUSTON--(BUSINESS WIRE)--Sept. 14, 2004--Endeavour International
Corporation (AMEX:END) today confirmed that its United Kingdom
subsidiary, Endeavour Energy UK Limited, has been awarded nine
production licenses covering 18 blocks in the 22nd Seaward Licensing
Round. The results of the round were announced today by the UK
Department of Trade and Industry.
    "This is an exciting step forward in executing our business model
for the North Sea, demonstrating the strong exploratory capabilities
that Endeavour offers through its experienced leadership team and
access to the largest 3-D seismic data base for the region," said John
Seitz, co-chief executive officer. "In a very short period of time, we
have been able to generate numerous high-quality exploratory leads and
prospects in a prolific basin with significant opportunity for further
exploration and production."
    "We appreciate the confidence the UK's Department of Trade and
Industry has shown in us through the award of these licenses,"
continued William L. Transier, co-chief executive officer. "Based on
our evaluations, we believe the quality of the prospects on this
leasehold should lead to multiple drilling opportunities with our
partners over the next two years with planned drilling to begin next
year."
    Endeavour will serve as operator of five production licenses
located in the Central North Sea. These include:

    --  Blocks 21/11c and 20/15b (100 percent equity)

    --  Block 21/20c (100 percent equity)

    --  Blocks 22/24e (60 percent equity)

    --  Block 30/23b (60 percent equity)

    --  Blocks 31/26b and 39/1b (60 percent equity)

    The company was also awarded a non-operated 47.5 percent equity in
Blocks 23/16e and 23/17b in the Central North Sea.
    Other non-operated licenses and interests include the following in
the Southern Gas Basin:

    --  Blocks 42/10 and 42/15 (50 percent equity)

    --  Blocks 43/22, 43/23, 43/27b, 43/28 and 43/29 (25 percent
        equity)

    --  Blocks 44/21c and 44/25b (25 percent equity)

    The licenses cover more than a half million acres, approximately
2,160 square kilometers, or equivalent to more than 100 Gulf of Mexico
blocks. Of the production licenses, four licenses covering eight
blocks were granted under traditional terms that require the company
to fulfill a work program within four years from the date of award.
The remaining five licenses covering 10 blocks are under "promote"
terms that require the company to pay reduced license fees for a
two-year period as exploratory evaluations are conducted.
    In early 2004, Endeavour was transformed into an independent
exploration company focused on taking advantage of an industry
transition that is occurring in the North Sea similar to what occurred
in the Gulf of Mexico in the 1980s. Major integrated energy companies
continue restructuring their portfolios away from operating in mature
producing areas, and the shift creates financial and development
opportunities for smaller, niche players with the technical
capabilities to profitably exploit the remaining reserves. When this
transition took place in the Gulf, a number of highly successful
independents were born. Endeavour is one of the first U.S.-based
companies created to tap into this same potential in the North Sea.
    Endeavour International Corporation is an international oil and
gas exploration and production company primarily focused on the
acquisition, exploration and development of energy reserves in the
North Sea sectors of the United Kingdom and Norway. The company also
holds interests in a gas development project in Thailand. 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.

    CONTACT: Endeavour International Corporation, Houston
             Janice Aston White, 713-307-8780