Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
WILLIAMS JOHN A
   2. Issuer Name and Ticker or Trading Symbol
BURLINGTON RESOURCES INC [BR] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
S.V.P., Exploration
(Last)
(First)
(Middle)
BURLINGTON RESOURCES INC., 717 TEXAS AVENUE, SUITE 2100		 3. Date of Earliest Transaction (Month/Day/Year)
03/31/2006
(Street)

HOUSTON, TX 77002		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 03/31/2006   D   30,799 D (1) 0 (1) D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Performance Share Units (2) 03/31/2006   D     41,250   (2)   (2) Common Stock 41,250 (2) 0 D  
Stock Option (right to buy) $ 44.215 03/31/2006   D     12,500   (3) 01/26/2015 Common Stock 12,500 $ 0 0 (3) D  
Stock Option (right to buy) $ 90.87 03/31/2006   D     20,000   (4) 01/25/2016(5) Common Stock 20,000 $ 0 0 (4) D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
WILLIAMS JOHN A
BURLINGTON RESOURCES INC.
717 TEXAS AVENUE, SUITE 2100
HOUSTON, TX 77002		       S.V.P., Exploration  

Signatures

 John A. Williams   04/04/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) 24,299 of the shares of common stock listed in Table I were cancelled at the effective time of the merger (the "Effective Time") contemplated by the Agreement and Plan of Merger, dated December 12, 2005, to which the Issuer and ConocoPhillips are parties (the "Merger Agreement"), and, in consideration of such cancellation, the Reporting Person became entitled to receive, for each such share of Issuer common stock, 0.7214 shares of ConocoPhillips common stock and $46.50. The remaining 6,500 of the shares of common stock listed in Table I were converted at the Effective Time into 9,376 shares of ConocoPhillips common stock.
(2) 1 for 1. These units were granted under the Issuer's 2005 Performance Share Unit Plan. At the Effective Time, the Reporting Person became vested in, and entitled to a cash payment with respect to, 3,378 performance share units in accordance with the provisions of the plan and the Merger Agreement, and the remaining unvested performance stock units were forfeited at that time.
(3) Pursuant to the Merger Agreement, at the Effective Time, this option, which provided for vesting in two equal annual installments following the date of grant (January 26, 2005), ceased to represent a right to acquire shares of common stock of the Issuer and thereafter constituted a fully vested option to purchase 18,031 shares of ConocoPhillips common stock with an exercise price of $30.6506 per share.
(4) Pursuant to the Merger Agreement, at the Effective Time, this option, which provided for vesting in two equal annual installments following the date of grant (January 25, 2006), ceased to represent a right to acquire shares of common stock of the Issuer and thereafter constituted an option to purchase 28,851 shares of ConocoPhillips common stock with an exercise price of $62.9925 per share.
(5) With the respect to 1,100 of the 20,000 shares underlying this option, the expiration date is January 24, 2016.

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