SC 13G/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

(Amendment No. 4)

Endeavour International Corporation

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

29259G200

(CUSIP Number)

December 31, 2011

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this

Schedule is filed:

|_|           Rule 13d-1(b)

|X|           Rule 13d-1(c)

|_|           Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No.  29259G200
1.	Names of Reporting Persons.
	Smedvig QIF Plc
2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)	|_|
	(b)	|X|
3.	SEC Use Only
4.	Citizenship or Place of Organization
	Ireland
Number of Shares Beneficially Owned by Each Reporting Person With
	5.	Sole Voting Power
		5,500,891 (See Item 4 of Schedule 13G)
	6.	Shared Voting Power
		0
	7.	Sole Dispositive Power
		5,500,891 (See Item 4 of Schedule 13G)
	8.	Shared Dispositive Power
		0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person
	5,500,891 (See Item 4 of Schedule 13G)
10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  |_|
11.	Percent of Class Represented by Amount in Row (9)
	13.3% (See Item 4 of Schedule 13G)
12.	Type of Reporting Person (See Instructions)
	OO

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CUSIP No.  29259G200
1.	Names of Reporting Persons.
	Smedvig Asset Allocation AS
2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)	|_|
	(b)	|X|
3.	SEC Use Only
4.	Citizenship or Place of Organization
	Ireland
Number of Shares Beneficially Owned by Each Reporting Person With
	5.	Sole Voting Power
		5,500,891 (See Item 4 of Schedule 13G)
	6.	Shared Voting Power
		0
	7.	Sole Dispositive Power
		5,500,891 (See Item 4 of Schedule 13G)
	8.	Shared Dispositive Power
		0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person
	5,500,891 (See Item 4 of Schedule 13G)
10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  |_|
11.	Percent of Class Represented by Amount in Row (9)
	13.3% (See Item 4 of Schedule 13G)
12.	Type of Reporting Person (See Instructions)
	OO

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CUSIP No.  29259G200
1.	Names of Reporting Persons.
	John Thore Olsen
2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)	|_|
	(b)	|X|
3.	SEC Use Only
4.	Citizenship or Place of Organization
	Ireland
Number of Shares Beneficially Owned by Each Reporting Person With
	5.	Sole Voting Power
		5,500,891 (See Item 4 of Schedule 13G)
	6.	Shared Voting Power
		0
	7.	Sole Dispositive Power
		5,500,891 (See Item 4 of Schedule 13G)
	8.	Shared Dispositive Power
		0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person
	5,500,891 (See Item 4 of Schedule 13G)
10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  |_|
11.	Percent of Class Represented by Amount in Row (9)
	13.3% (See Item 4 of Schedule 13G)
12.	Type of Reporting Person (See Instructions)
	IN

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Item 1.

(a) Name of Issuer:

Endeavour International Corporation (the “Issuer”)

(b) Address of Issuer's Principal Executive Offices:

1001 Fannin Street, Suite 1600, Houston, TX 77002

Item 2.

(a) Name of Persons Filing:

This statement is being filed by each of:

Smedvig QIF Plc (the “QIF”)

Smedvig Asset Allocation AS (“SAA”)

John Thore Olsen (“JTO”)

The QIF is an Irish Qualifying investment fund.  SAA is the investment manager for the QIF and is regulated by the Norwegian FSA.  JTO serves as the Chief Executive Officer and Chief Investment Officer of SAA.

The QIF, SAA, and JTO are referred to herein collectively as the “Reporting Persons.”

An agreement among the Reporting Persons that this statement be filed on behalf of each of them is attached hereto as Exhibit 99.1.

(b) Address of Principal Business Office or, if none, Residence:

QIF:           39/40 Upper Mount Street, Dublin 2, Ireland

SAA:           Løkkeveien 103, PO Box 900, 4004 Stavanger, Norway

JTO:           Dynjarvegen 20, 4352 Kleppe, Norway

(c) Citizenship:

The response of the Reporting Persons to Row 4 in each of their respective cover pages are incorporated herein by reference.

(d) Title of Class of Securities:

Common Stock, par value $0.001 per share (the “Common Stock”)

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(e) CUSIP Number:

29259G200

Item 3. If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

(a)  |_| Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);

b)  |_| Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);

(c)  |_| Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);

(d)  |_| Investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8);

(e)  |_| An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);

(f)  |_| An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

(g) |_|  A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);

(h) |_|  A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i) |_|  A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j) |_|  A non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J);

(k) |_| Group, in accordance with §240.13d-1(b)(1)(ii)(K).

Not Applicable

Item 4.            Ownership

(a)-(c) The responses of the Reporting Persons to Rows 5, 6, 7, 8, 9 and 11 in each of their respective cover pages are incorporated herein by reference.

As of December 31, 2011, the QIF and, by reason of SAA being the QIF’s investment manager and JTO serving as its chief investment officer, SAA and JTO as well, had sole

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beneficial ownership of an aggregate of 5,500,891 shares of Common Stock, composed of (x) 3,847,597 shares of Common Stock issuable upon the conversion of the Guaranteed Convertible Bonds due 2016 (the “Bonds”) and (y) 1,653,294 shares of outstanding Common Stock.  As of such date, such aggregate amount of shares beneficially owned represented approximately 13.3% of the shares of Common Stock outstanding, determined in accordance with Rule 13d-3(d)(1)(i) under the Exchange Act (based on the number of shares outstanding as of November 3, 2011, as reported in the Issuer’s Quarterly Report on Form 10-Q filed November 8, 2011 (37,663,603 shares) plus the shares issuable to the QIF upon conversion of the Bonds, as set forth above).

The Bonds were issued by Endeavour Energy Luxembourg sarl (“LuxCo”), and are guaranteed by LuxCo’s parent, the Issuer (also, the “Guarantor”), and are convertible into shares of Common Stock of the Issuer.

The Bonds bear interest at a rate of 11.5% per annum which is capitalized quarterly on March 31, June 30, September 30 and December 31 of each year, commencing on March 31, 2008.  Beginning with the interest period commencing on March 31, 2014, the Bonds bear interest at the rate of 7.5% per annum.

At the option of the holders thereof, the Bonds may be converted at the principal amount thereof together with accrued interest capitalized to the conversion date into shares of Common Stock at the conversion price.  Such conversion right commences on the day falling one month after January 24, 2008 and expires 15 business days prior to January 24, 2016.  The number of shares of Common Stock which shall be delivered upon conversion per U.S.$ principal amount of the Bonds is determined by dividing the outstanding principal amount of the Bond (including capitalized interest) by the conversion price then in effect.

The initial conversion price for the Bonds was $2.36.  The initial conversion price is subject to adjustments, calculated by the Guarantor in the event of (a) dividends or other distributions to all holders of outstanding Common Stock, (b) stock splits and (c) issue of rights or warrants to all holders of outstanding Common Stock to subscribe for or purchase shares at a price less than the market price or the issue of Common Stock at a price below $2.36.  After the Issuer’s 1-for-7 reverse stock split on November 18, 2010, the as-adjusted initial conversion price became $16.52.

The Guarantor can convert the Bonds if less than 15% of the outstanding principal amount is outstanding.

Bondholders holding at least 25% of the Bonds have a put right on January 24, 2016, if the weighted average closing price for a share of Common Stock for the 30 day period ending two business days prior to such date is less than $2.36, which amount was adjusted to $16.52 after the Issuer’s 1-for-7 reverse stock split on November 18, 2010.  LuxCo must redeem the Bonds at their outstanding principal amount (which includes the capitalized interest).  If holders of the Bonds do not exercise such put right, then the

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conversion price will be reset to the market price for a share of Common Stock if it is lower than the conversion price on such date.

Each holder of a Bond has a put right upon a change of control and LuxCo is required to redeem the Bonds at a Change of Control Redemption Price, which is the greater of (a) number of shares that bondholder would have received if it had exercised its conversion rights multiplied by the price of the Common Stock tendered in the change of control and (b) an amount equal to the greater of:  (i) 115% of the outstanding principal amount (including capitalized interest) and (ii) an amount sufficient to generate a 15% pre-tax annual IRR on such Bonds.

Item 5.            Ownership of Five Percent or Less of a Class

Not Applicable

Item 6.            Ownership of More than Five Percent on Behalf of Another Person

Not Applicable

Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person

Not Applicable

Item 8.            Identification and Classification of Members of the Group

Not Applicable

Item 9.            Notice of Dissolution of Group

Not Applicable

Item 10.          Certification

(b)           By signing below the undersigned certify that, to the best of their knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

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Signature

After reasonable inquiry and to the best of their knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.

Dated: February 2, 2012

SMEDVIG QIF PLC
By:	/s/  John Thore Olsen
	Name:	John Thore Olsen
	Title:	Chief Executive Officer and Chief Investment Officer of Smedvig Asset Allocation AS as Investment Manager of Smedvig QIF Plc
SMEDVIG ASSET ALLOCATION AS
By:	/s/  John Thore Olsen
	Name:	John Thore Olsen
	Title:	Chief Executive Officer and Chief Investment Officer
/s/  John Thore Olsen
John Thore Olsen

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EXHIBIT INDEX

Exhibit                                Description

Exhibit A                            Joint Filing Agreement

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EX-99.1

EXHIBIT A

JOINT FILING AGREEMENT

This will confirm the agreement by and among all the undersigned that the Schedule 13G/A filed on or about this date, and any amendments thereto, with respect to beneficial ownership by the undersigned of shares of the common stock, par value $0.001 per share, of Endeavour International Corporation, is being filed on behalf of each of the undersigned in accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934.  This agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

Dated: February 2, 2012

SMEDVIG QIF PLC
By:	/s/  John Thore Olsen
	Name:	John Thore Olsen
	Title:	Chief Executive Officer and Chief Investment Officer of Smedvig Asset Allocation AS as Investment Manager of Smedvig QIF Plc
SMEDVIG ASSET ALLOCATION AS
By:	/s/  John Thore Olsen
	Name:	John Thore Olsen
	Title:	Chief Executive Officer and Chief Investment Officer
/s/  John Thore Olsen
John Thore Olsen