SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* JP MORGAN PARTNERS 23A SBIC LP (Last) (First) (Middle) J.P. MORGAN PARTNERS 1221 AVENUE OF THE AMERICAS 40TH FLOOR (Street) NEW YORK NY 10020 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol CARRIZO OIL & GAS INC [ CRZO ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 09/28/2004
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

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	09/28/2004		S		326,850	D	$9.71	2,250,631	D
Common Stock	09/28/2004		S		27,000	D	$9.88	2,223,631	D
Common Stock	09/29/2004		S		12,300	D	$9.71	2,211,331	D
Common Stock	09/29/2004		S		20,000	D	$9.72	2,191,333	D
Common Stock	09/29/2004		S		5,700	D	$9.75	2,185,631	D
Common Stock	09/29/2004		S		1,800	D	$9.76	2,183,831	D
Common Stock	09/29/2004		S		6,500	D	$9.79	2,177,331	D

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 Securities Underlying Derivative Security (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: 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
Stock Options (right to purchase)	$1.75							12/15/2000	12/15/2009	Common Stock	16,667		16,667	I	See Footnote(1)
Stock Options (right to purchase)	$5.1719							05/19/2001	05/19/2010	Common Stock	3,333		3,333	I	See Footnote(2)
Stock Options (right to purchase)	$7.4							05/18/2002	05/17/2011	Common Stock	2,500		2,500	I	See Footnote(3)
Stock Options (right to purchase)	$5.36							03/27/2003	03/27/2012	Common Stock	10,000		10,000	I	See Footnote(4)
Stock Options (right to purchase)	$4.78							05/22/2003	05/22/2012	Common Stock	5,000		5,000	I	See Footnote(5)
Stock Options (right to purchase)	$5.75							05/27/2004	05/26/2013	Common Stock	5,000		5,000	I	See Footnote(6)
Stock Options (right to purchase)	$9.215							06/09/2005	06/08/2014	Common Stock	7,000		7,000	I	See Footnote(7)

1. Name and Address of Reporting Person* JP MORGAN PARTNERS 23A SBIC LP (Last) (First) (Middle) J.P. MORGAN PARTNERS 1221 AVENUE OF THE AMERICAS 40TH FLOOR (Street) NEW YORK NY 10020 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* J P MORGAN PARTNERS 23A SBIC MANAGER INC (Last) (First) (Middle) C/O JPMORGAN PARTNERS 1221 AVENUE OF THE AMERICAS 40TH FL. (Street) NEW YORK NY 10021 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* JP MORGAN CHASE BANK (Last) (First) (Middle) 1 CHASE MANHATTAN PLAZA 40TH FLOOR (Street) NEW YORK NY 10081 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* J P MORGAN CHASE & CO (Last) (First) (Middle) 270 PARK AVE 35TH FL (Street) NEW YORK NY 10017 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. These stock options were granted to Arnold Chavkin and Christopher Behrens, directors of the Issuer. Messrs. Chavkin and Behrens are Chief Executive Officer and Managing Director, respectively, of J.P. Morgan Partners (23A SBIC Manager), Inc., the general partner of J.P. Morgan Partners (23A SBIC), L.P. ("JPM 23A SBIC"). Mr. Chavkin ceased to be a director of the Issuer on March 11, 2002. 6,667 of the stock options granted to him are currently exercisable. Mr. Behrens' options became exercisable in three annual installments commencing December 15, 2000. Mr. Chavkin and Mr. Behrens are obligated to transfer any shares issued under uncancelled stock options to JPM 23A SBIC.

2. These stock options each were granted to Arnold Chavkin and Christopher Behrens, directors of the Issuer. Mr. Chavkin ceased to be a director of the Issuer on March 11, 2002. 833 of the stock options granted to him are currently exercisable. Mr. Behrens' options become exercisable in three annual installments commencing May 19, 2001. Mr. Chavkin and Mr. Behrens are obligated to transfer any shares issued under uncancelled stock options to JPM 23A SBIC.

3. These stock options were granted to Christopher Behrens, a director of the Issuer. Mr. Behrens is obligated to transfer any shares issued under his stock options to JPM 23A SBIC. These options became exercisable in three annual installments commencing May 18, 2002.

4. These options were granted to Bryan Martin, a director of the Issuer. Mr. Martin is a Principal of J.P. Morgan Partners, LLC, the investment advisor to J.P. Morgan Partners (23A SBIC), L.P. Mr. Martin is obligated to transfer any shares issued under his stock options to JPM 23A SBIC. These options became exercisable in three annual installments commencing March 27, 2003.

5. 2,500 stock options each were granted to Bryan Martin and Christopher Behrens, directors of the Issuer. These options became exercisable in three annual installments commencing May 22, 2003. Mr. Martin and Mr. Behrens are obligated to transfer any shares issued under the stock options to JPM 23A SBIC.

6. 2,500 stock options each were granted to Bryan Martin and Christopher Behrens, directors of the Issuer. These options became exercisable in three annual installments commencing May 27, 2004. Mr. Martin and Mr. Behrens are obligated to transfer any shares issued under the stock options to JPM 23A SBIC.

7. 3,500 stock options were granted to Bryan Martin and Christopher Behrens, directors of the Issuer. These options become exercisable in three annual installments commencing June 9, 2005. Mr. Martin and Mr. Behrens are obligated to transfer any shares issued under the stock options to JPM 23A SBIC.

	J.P. Morgan Partners (23A SBIC), L.P. By: J.P. Morgan Partners (23A SBIC Manager), Inc., its General Partner By: /s/ Christopher C. Behrens, Managing Director	09/30/2004
	** Signature of Reporting Person	Date
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* 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).
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