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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1. Name and Address of Reporting Person * PRIMAT DIDIER   2. Issuer Name and Ticker or Trading Symbol SCHLUMBERGER LTD /NV/ [SLB] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 210, ROUTE DE JUSSY 3. Date of Earliest Transaction (Month/Day/Year) 12/23/2005 (Street) CH 1243 PRESINGE SWITZERLAND, V8  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 12/23/2005   S   28,295 D $ 100.25 1,116,805 I Primeight (1) Common Stock 12/23/2005   S   4,700 D $ 100.26 1,112,105 I Primeight (1) Common Stock 12/23/2005   S   3,600 D $ 100.254 1,108,505 I Primeight (1) Common Stock 12/23/2005   S   3,600 D $ 100.27 1,104,905 I Primeight (1) Common Stock 12/23/2005   S   5,233 D $ 100.31 1,099,672 I Primeight (1) Common Stock               6,805,600 D   Common Stock               560,000 I * (2) Common Stock               4,798,020 I Primanagement (3) Common Stock               3,999,008 I by Children (4)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
PRIMAT DIDIER 210, ROUTE DE JUSSY CH 1243 PRESINGE SWITZERLAND, V8	X

Signatures

By: /s/Janet B. Glassmacher Attorney-in-Fact For: Didier Primat		12/27/2005
**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)	Primeight Inc. is a corporation organized under the laws of the British Virgin Islands and the sole shareholder is Didier Primat. The assets of Primeight were transferred to Primeight from Primanagement Inc. and from his minor children on 12/19/2005 and consist of shares of the issuer deemed to be beneficially owned by Mr. Primat and his minor children.
(2)	Shares held by Primwest Holding NV as to which the reporting person has shared investment power.
(3)	Shares held by Primanagement Inc., as to which the reporting person is the sole shareholder.
(4)	By minor children

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