8-K

United States
Securities and Exchange Commission

Washington, D.C. 20549

Form 8-K

Current Report

Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) February 16, 2010

Endeavour International Corporation

(Exact name of registrant as specified in its charter)

Nevada
(State or other jurisdiction of
incorporation) 001-32212
(Commission file
Number) 88-0448389
(I.R.S. Employer
Identification No.)

1001 Fannin, Suite 1600, Houston, Texas
(Address of principal executive offices) 77002
(Zip code)

(713) 307-8700

Registrant’s telephone number, including area code

None

(Former name, former address and former fiscal year, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

     o Written communications pursuant to Rule 425 under the Securities Act.

     o Soliciting material pursuant to Rule 14a-12 under the Exchange Act.

     o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

     o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

Endeavour International Corporation

ITEM 7.01. Regulation FD Disclosure.

Attached as Exhibit 99.1, which is incorporated herein by reference, to this Current Report on Form 8-K is the Company’s press release dated February 16, 2010 discussing oil and gas reserves at December 31, 2009.

In accordance with General Instruction B.2 of Form 8-K, the foregoing information, including Exhibit 99.1, shall not be deemed “filed” for the purposes of Section 18 of the Exchange Act or otherwise subject to the liabilities of that section, nor shall such information, including Exhibit 99.1, be deemed incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

As of January 1, 2010, the Securities and Exchange Commission (SEC) changed its rules to permit oil and gas companies, in their filings with the SEC, to disclose not only proved reserves, but also probable reserves and possible reserves. Proved oil and gas reserves are those quantities of oil and gas, which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible — from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and government regulations — prior to the time at which contracts providing the right to operate expire. Probable reserves include those additional reserves that a company believes are as likely as not to be recovered and possible reserves include those additional reserves that are less certain to be recovered than probable reserves. We use may use certain terms in our news releases, such as “reserve potential,” that the SEC’s guidelines strictly prohibit us from including in filings with the SEC. In addition, we do not represent that the probable or possible reserves described herein meet the recoverability thresholds established by the SEC in its new definitions. Investors are urged to also consider closely the disclosure in our filings with the SEC, available from our website at www.endeavourcorp.com. 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.

ITEM 9.01. Financial Statements and Exhibits.

(d)	Exhibits.
	99.1	Press Release dated February 16, 2010.

Endeavour International Corporation

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Endeavour International Corporation

By:  /s/ Robert L. Thompson

Robert L. Thompson

Chief Accounting Officer

Date: February 17, 2010

EX-99.1

Exhibit 99.1

For immediate release

Endeavour Announces
Record Reserve Growth in 2009

Houston, February 16, 2010 — Endeavour International Corporation (NYSE-Amex: END) (LSE:ENDV) today announced a 49 percent increase in proved and probable reserves as of December 31, 2009 resulting in a record reserve replacement rate of 980 percent of 2009 production, based on 2P reserves.

“This increase is attributable to the success of our North Sea exploration and appraisal programs and demonstrates our ability to grow the company through the drill bit,” said William L. Transier, chairman, chief executive officer and president. “We now have four field developments underway in the United Kingdom. These longer-cycle projects complement our expanded U.S. onshore initiative that we expect to contribute significantly to reserve growth in 2010.”

Proved and probable reserves at year-end 2009 increased to 38.9 million barrels of oil equivalent (mmboe) compared to 26.1 mmboe a year ago. Extensions, discoveries and upward revisions to prior estimates and purchases added 13.7 mmboe during 2009. Production for the year was 1.4 mmboe.

The upward revisions in 2P reserves were a result of the drilling of two wells in Cygnus Fault Blocks 2b and 3, the 2007 Bacchus discovery maturing to development status and better-than-expected performance from several producing assets.

Net Reserves at December 31,
	2009
	Oil		NGL		Gas		Equivalents
	(mbbl)		(mbbl)		(mmcf)		(mboe)
Audited by: Netherland, Sewell and Associates, Inc.
Proved Developed
Producing		1,212		26		4,458		1,981
Non-Producing		150		—		4,578		913
Proved Undeveloped		1,973		5		80,064		15,322
Proved (1P)		3,335		31		89,100		18,216
Probable		7,352		20		79,919		20,692
Proved + Probable (2P)		10,687		51		169,019		38,908
Possible		7,859		34		89,478		22,806
Proved + Probable + Possible (3P)		18,546		85		258,497		61,714

	2008*
	Oil		NGL		Gas		Equivalents
	(mbbl)		(mbbl)		(mmcf)		(mboe)
Prepared by: Netherland, Sewell and Associates, Inc.
Proved Developed
Producing		989		—		6,657		2,099
Non-Producing		466		19		338		542
Proved Undeveloped		675		—		20,825		4,146
Proved (1P)		2,130		19		27,820		6,787
Probable		5,777		7		81,375		19,347
Proved + Probable (2P)		7,907		26		109,195		26,134
Possible		11,034		6		107,090		28,889
Proved + Probable + Possible (3P)		18,941		32		216,285		55,023

* Reserve information has been restated for the disposition of its Norwegian operations in May 2009 (5.6 mmboe).

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 http://www.endeavourcorp.com.

Source: Netherland, Sewell and Associates, Inc

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.

As of January 1, 2010, the Securities and Exchange Commission (SEC) changed its rules to permit oil and gas companies, in their filings with the SEC, to disclose not only proved reserves, but also probable reserves and possible reserves. Proved oil and gas reserves are those quantities of oil and gas, which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible — from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and government regulations — prior to the time at which contracts providing the right to operate expire. Probable reserves include those additional reserves that a company believes are as likely as not to be recovered and possible reserves include those additional reserves that are less certain to be recovered than probable reserves. We use may use certain terms in our news releases, such as “reserve potential,” that the SEC’s guidelines strictly prohibit us from including in filings with the SEC. In addition, we do not represent that the probable or possible reserves described herein meet the recoverability thresholds established by the SEC in its new definitions. Investors are urged to also consider closely the disclosure in our filings with the SEC, available from our website at www.endeavourcorp.com. 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
Mike Kirksey	+44 (0) 207 451 2364
	713-307-8788
Canaccord Adams — UK Broker
Jeffrey Auld	+ 44 (0) 207 050 6500
Pelham Public Relations — UK Media
Philip Dennis	+44 (0) 207 743 6363
Henry Lerwill	+44 (0) 203 178 6242