Exhibit 99.2
 
 For immediate release
 Endeavour to Acquire Operated Interests
Expanding its Position in Pennsylvania Marcellus Shale
 Transaction strengthens companys position
in one of the most active and lowest cost U.S. onshore shale plays
 Endeavour also provides operational and financial update
 Houston, July 18, 2011 
  
    
    Approximately 50,000 net acres of leasehold with 100 percent operated working interests
in McKean and Potter counties;
    
    Current production from three existing wells of approximately three to four million
cubic feet of natural gas per day, including the Potato Creek #3H well that initially
flowed 11 million cubic feet of gas per day and is expected to recover in excess of 4
billion cubic feet of gas;
    
    100 percent ownership of Potato Creek LLC, which owns a midstream gathering system and
related facilities in southern McKean County, including a 10-mile 16 trunkline connected
and flowing to Tennessee Gas Pipelines 24 mainline; and
    
    Proprietary and fully processed 3-D seismic survey covering the entire Potato Creek
lease block.




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Operational and Financial Update
 Bacchus Update
  Senior Term Loan
  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 the
United States. For more information, visit www.endeavourcorp.com .
 Additional information for investors:
 This press release contains forward-looking statements within the meaning of Section 27A of the
Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These
forward-looking statements include statements that express a belief, expectation, or intention, as
well as those that are not statements of historical fact, and may include projections and estimates
concerning the timing and success of specific projects and our future production, revenues, income
and capital spending. Our forward-looking statements are generally accompanied by words such as
estimate, project, predict, believe, expect, anticipate, potential, plan, goal or
other words that convey the uncertainty of future events or outcomes. We caution you not to rely on
them unduly. We have based these forward-looking statements on our current expectations and
assumptions about future events. While our management considers these expectations and assumptions
to be reasonable, they are inherently subject to significant business, economic, competitive,
regulatory and other risks, contingencies and uncertainties, most of which are difficult to predict
and many of which are beyond our control. These risks, contingencies and uncertainties, which may
not be exhaustive, relate to, among other matters, the following: discovery, estimation,
development and replacement of oil and gas reserves; decreases in proved reserves due to technical
or economic factors; drilling of wells and other planned exploitation activities; timing and amount
of future production of oil and gas; the volatility of oil and gas prices; availability and terms
of capital; operating costs such as lease operating expenses, administrative costs and other
expenses; our future operating or financial results; amount, nature and timing of capital
expenditures, including future development costs; cash flow and anticipated liquidity; availability
of drilling and production equipment; uncertainties related to drilling and production operations
in a new region; cost and access to natural gas gathering, treatment and pipeline facilities;
business strategy and the availability of acquisition opportunities; and factors not
known to us at this time. Any of these factors, or any combination of these factors, could
materially affect our future financial condition or results of operations and the ultimate accuracy
of a forward-looking statement. The forward-looking statements are not guarantees of our future
performance, and our actual results and future developments may differ materially from those
projected in the forward-looking statements. In addition, any or all of our forward-looking
statements included in this release may turn out to be incorrect. They can be affected by
inaccurate assumptions we might make or by known or unknown risks and uncertainties, including
those included in our Annual Report on Form 10-K for the year ended December 31, 2010.
 Reserve engineering is a process of estimating underground accumulations of oil and natural gas
that cannot be measured in an exact way. The accuracy of any reserve estimate depends on the
quality of available data, the interpretation of such data and price and cost assumptions made by
our reserve engineers. In addition, the results of drilling, testing and production activities may
justify revisions of estimates that were made previously. If significant, such revisions would
change the schedule of any further production and development drilling. Accordingly, reserve
estimates may differ from the quantities of oil and natural gas that are ultimately recovered. We
use may use certain terms in our news releases, such as
resource potential, that the SECs guidelines strictly prohibit us from including in filings with
the SEC. Investors are urged to also consider closely the disclosure in our filings with the SEC,
available from our website at www.endeavourcorp.com.




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Endeavour is also subject to the requirements
of the London Stock Exchange and considers the disclosures in this release to be appropriate and/or
required under the guidelines of that exchange.
 For further information:
 Endeavour  Investor Relations
 
 Pelham Public Relations  UK Media