-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001125282-04-004753.txt : 20040930
<SEC-HEADER>0001125282-04-004753.hdr.sgml : 20040930
<ACCEPTANCE-DATETIME>20040930192822
ACCESSION NUMBER:		0001125282-04-004753
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20040928
FILED AS OF DATE:		20040930
DATE AS OF CHANGE:		20040930

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			JP MORGAN CHASE BANK
		CENTRAL INDEX KEY:			0001208636
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 8880 [8880]

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-29187-87
		FILM NUMBER:		041056370

	BUSINESS ADDRESS:	
		STREET 1:		1CHASE MANHATTAN PLAZA
		STREET 2:		40TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10081
		BUSINESS PHONE:		2125524904

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CARRIZO OIL & GAS INC
		CENTRAL INDEX KEY:			0001040593
		STANDARD INDUSTRIAL CLASSIFICATION:	CRUDE PETROLEUM & NATURAL GAS [1311]
		IRS NUMBER:				760415919
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		14701 ST MARYS LANE
		STREET 2:		STE 800
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77079
		BUSINESS PHONE:		2814961352

	MAIL ADDRESS:	
		STREET 1:		14701 ST MARYS LANE
		STREET 2:		SUITE 800
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77079

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			J P MORGAN CHASE & CO
		CENTRAL INDEX KEY:			0000019617
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-29187-87
		FILM NUMBER:		041056369

	BUSINESS ADDRESS:	
		STREET 1:		270 PARK AVE
		STREET 2:		39TH FL
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		2122706000

	MAIL ADDRESS:	
		STREET 1:		270 PARK AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

	FORMER NAME:	
		FORMER CONFORMED NAME:	CHASE MANHATTAN CORP /DE/
		DATE OF NAME CHANGE:	19960402

	FORMER NAME:	
		FORMER CONFORMED NAME:	CHEMICAL BANKING CORP
		DATE OF NAME CHANGE:	19920703

	FORMER NAME:	
		FORMER CONFORMED NAME:	CHEMICAL NEW YORK CORP
		DATE OF NAME CHANGE:	19880508

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			JP MORGAN PARTNERS 23A SBIC LP
		CENTRAL INDEX KEY:			0001106535
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-29187-87
		FILM NUMBER:		041056372

	BUSINESS ADDRESS:	
		STREET 1:		J.P. MORGAN PARTNERS
		STREET 2:		1221 AVENUE OF THE AMERICAS 40TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10020
		BUSINESS PHONE:		2128993400

	MAIL ADDRESS:	
		STREET 1:		J.P. MORGAN PARTNERS
		STREET 2:		1221 AVENUE OF THE AMERICAS 40TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10020

	FORMER NAME:	
		FORMER CONFORMED NAME:	CB CAPITAL INVESTORS LLC
		DATE OF NAME CHANGE:	20000211

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			J P MORGAN PARTNERS 23A SBIC MANAGER INC
		CENTRAL INDEX KEY:			0001243237
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-29187-87
		FILM NUMBER:		041056371

	BUSINESS ADDRESS:	
		STREET 1:		C/O JPMORGAN PARTNERS
		STREET 2:		1221 AVENUE OF THE AMERICAS 40TH FL.
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10021
		BUSINESS PHONE:		2128993995

	MAIL ADDRESS:	
		STREET 1:		C/O JPMORGAN PARTNERS
		STREET 2:		1221 AVENUE OF THE AMERICAS 40TH FL.
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10021
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>b401275_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2004-09-28</periodOfReport>

    <dateOfOriginalSubmission>2004-09-30</dateOfOriginalSubmission>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001040593</issuerCik>
        <issuerName>CARRIZO OIL &amp; GAS INC</issuerName>
        <issuerTradingSymbol>CRZO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001106535</rptOwnerCik>
            <rptOwnerName>JP MORGAN PARTNERS 23A SBIC LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>J.P. MORGAN PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>1221 AVENUE OF THE AMERICAS 40TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10020</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001243237</rptOwnerCik>
            <rptOwnerName>J P MORGAN PARTNERS 23A SBIC MANAGER INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O JPMORGAN PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>1221 AVENUE OF THE AMERICAS 40TH FL.</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10021</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001208636</rptOwnerCik>
            <rptOwnerName>JP MORGAN CHASE BANK</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1 CHASE MANHATTAN PLAZA</rptOwnerStreet1>
            <rptOwnerStreet2>40TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10081</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000019617</rptOwnerCik>
            <rptOwnerName>J P MORGAN CHASE &amp; CO</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>270 PARK AVE</rptOwnerStreet1>
            <rptOwnerStreet2>35TH FL</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-09-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>16000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.79</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2250631</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-09-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>27000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.81</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2223631</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-09-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>12300</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.71</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2211331</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-09-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>20000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.72</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2191333</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-09-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5700</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.75</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2185631</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-09-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1800</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.76</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2183831</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-09-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>6500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.79</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2177331</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Options (right to purchase)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.75</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2000-12-15</value>
            </exerciseDate>
            <expirationDate>
                <value>2009-12-15</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>16667</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16667</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Options (right to purchase)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.1719</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2001-05-19</value>
            </exerciseDate>
            <expirationDate>
                <value>2010-05-19</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3333</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3333</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Options (right to purchase)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>7.40</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2002-05-18</value>
            </exerciseDate>
            <expirationDate>
                <value>2011-05-17</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2500</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Options (right to purchase)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.36</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2003-03-27</value>
            </exerciseDate>
            <expirationDate>
                <value>2012-03-27</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Options (right to purchase)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>4.78</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2003-05-22</value>
            </exerciseDate>
            <expirationDate>
                <value>2012-05-22</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Options (right to purchase)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.75</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2004-05-27</value>
            </exerciseDate>
            <expirationDate>
                <value>2013-05-26</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F6"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Options (right to purchase)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>9.215</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2005-06-09</value>
            </exerciseDate>
            <expirationDate>
                <value>2014-06-08</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">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. (&quot;JPM 23A SBIC&quot;). 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.</footnote>
        <footnote id="F2">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.</footnote>
        <footnote id="F3">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.</footnote>
        <footnote id="F4">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.</footnote>
        <footnote id="F5">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.</footnote>
        <footnote id="F6">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.</footnote>
        <footnote id="F7">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.</footnote>
    </footnotes>

    <remarks>This filing is being amended to correct the number of shares sold on September 28, 2004 and also to correct the sale prices
 for such date.</remarks>

    <ownerSignature>
        <signatureName>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</signatureName>
        <signatureDate>2004-09-30</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>b401275ex_99-1.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
<html>
<head><title>
Prepared and filed by St Ives Burrups
</title>
</head>
<body bgcolor="#FFFFFF">
<p align="left"><font size="2" face="serif"><b>23A SBIC/Carrizo Oil Exhibit 99.1</b></font></p>
<table align="center" width="100%" cellspacing="0" cellpadding="1" border="1" bordercolor="#000000">
<tr align="center" valign="top">
<td><font size="2" face="serif"><b>Name and Address of Reporting Person</b></font></td>
<td width="8%"><font size="2"><b>Designated Reporter<sup>1</sup></b></font></td>
<td width="11%"><font size="2" face="serif"><b>Statement for month/day/year</b></font></td>
<td width="10%"><font size="2" face="serif"><b>Deemed Execution Date , if any</b></font><font size="2"><br>
  <font face="serif"><b><font face="serif">(month/day/</font></b></font><br><font face="serif"><b><font face="serif">year)</font></b></font></font></td>
<td width="8%"><font size="2" face="serif"><b>Issuer Name, Ticker</b></font><font size="2"><br>
  <font face="serif"><b><font face="serif">or Trading Symbol</font></b></font></font></td>
<td width="8%"><font size="2" face="serif"><b>Title of Security<sup>1</sup></b></font></td>
<td width="14%"><font size="2" face="serif"><b>Title of Derivative Securities and Title and Amount of Securities Underlying Derivative Securities</b></font></td>
<td width="8%"><font size="2" face="serif"><b>Ownership Form:</b></font><font size="2"><br>
  <font face="serif"><b><font face="serif">Direct (D) or</font></b></font><br><font face="serif"><b><font face="serif">Indirect (I)</font></b></font></font></td>
<td width="10%"><font size="2" face="serif"><b>Nature of Indirect</b></font><font size="2"><br>
  <font face="serif"><b><font face="serif">Beneficial Ownership<sup>1</sup></font></b></font></font></td>
<td width="6%" valign="top"><font size="2" face="serif"><b>Disclaims</b></font><font size="2"><br>
  <font face="serif"><b><font face="serif">Pecuniary Interest</font></b></font></font></td>
</tr>
<tr valign="bottom">
<td align="left"><font size="2" face="serif">J.P. Morgan Partners (23A SBIC Manager), Inc.</font><font size="2"><br><font face="serif"><font face="serif">c/o J.P. Morgan Partners, LLC</font></font><br><font face="serif"><font face="serif">1221 Avenue of the Americas 40th Floor</font></font><br><font face="serif"><font face="serif">New York, New York 10020</font></font></font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">J.P. Morgan Partners (23A SBIC), LP</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">September 28, 2004</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">N/A</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">Carrizo Oil &amp; Gas, Inc. (&quot;CRZO&quot;)</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">Common Stock</font></td>
<td width="14%" align="center" valign="top"><font size="2" face="serif">See Table II</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">I</font></td>
<td width="10%" align="left" valign="top"><font size="2" face="serif">See Explanatory </font><font size="2"><br><font face="serif"><font face="serif">Note 2 below</font></font></font></td>
<td width="6%" align="center" valign="top"><font size="2" face="serif">No</font></td>
</tr>
<tr valign="bottom">
<td align="left"><font size="2" face="serif">J.P. Morgan Chase Bank</font><font size="2"><br><font face="serif"><font face="serif">270 Park Avenue </font></font><br><font face="serif"><font face="serif">35th Floor</font></font><br><font face="serif"><font face="serif">New York, NY  10017</font></font></font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">J.P. Morgan Partners (23A SBIC), LP</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">September 28, 2004</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">N/A</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">Carrizo Oil &amp; Gas, Inc. (&quot;CRZO&quot;)</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">Common Stock</font></td>
<td width="14%" align="center" valign="top"><font size="2" face="serif">See Table II</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">I</font></td>
<td width="10%" align="left" valign="top"><font size="2" face="serif">See Explanatory </font><font size="2"><br><font face="serif"><font face="serif">Note 3 below</font></font></font></td>
<td width="6%" align="center" valign="top"><font size="2" face="serif">No</font></td>
</tr>
<tr valign="bottom">
<td align="left"><font size="2" face="serif">J.P. Morgan Chase &amp; Co.</font><font size="2"><br><font face="serif"><font face="serif">270 Park Avenue</font></font><br><font face="serif"><font face="serif">35<sup>th</sup> Floor</font></font><br><font face="serif"><font face="serif">New York, NY 10017</font></font></font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">J.P. Morgan Partners (23A SBIC), LP</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">September 28, 2004</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">N/A</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">Carrizo Oil &amp; Gas, Inc. (&quot;CRZO&quot;) </font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">Common Stock</font></td>
<td width="14%" align="center" valign="top"><font size="2" face="serif">See Table II</font></td>
<td width="8%" align="center" valign="top"><font size="2" face="serif">I</font></td>
<td width="10%" align="left" valign="top"><font size="2" face="serif">See Explanatory </font><font size="2"><br><font face="serif"><font face="serif">Note 4 below</font></font></font></td>
<td width="6%" align="center" valign="top"><font size="2" face="serif">No</font></td>
</tr>
</table>
<p align="left"><font face="serif" size="1">Explanatory Note:</font></p>
<table width="100%" cellspacing="0" cellpadding="0" border="0">
<tr valign="top">
<td width="3%"><font size="2" face="serif">
<font face="serif" size="1">1)</font></font></td>
<td align="left">
<font face="serif" size="1">The Designated Reporter is executing this report on behalf of all
Reporting Persons, each of whom has authorized it to do so.  Each of such Persons disclaims beneficial ownership of the
securities to the extent it exceeds such Person&#8217;s pecuniary interest therein.</font></td>
</tr>
</table>
<table width="100%" cellspacing="0" cellpadding="0" border="0">
<tr valign="top">
<td width="3%"><font size="2" face="serif">
<font face="serif" size="1">2)</font></font></td>
<td align="left">
<font face="serif" size="1">The amounts shown in Tables I and II represent the beneficial
ownership of the Issuer's equity securities by J.P. Morgan Partners (23A SBIC), L.P., (&#8220;JPM 23A SBIC&#8221;), a
portion of which may be deemed attributable to the Reporting Person because the Reporting Person is the general partner of
JPM 23A SBIC.   The actual pro rata portion of such beneficial ownership that may be deemed to be attributable to the
Reporting Person is not readily determinable because it is subject to several variables, including the internal rate of
return and vesting of interests within JPM 23A SBIC. </font></td>
</tr>
</table>
<table width="100%" cellspacing="0" cellpadding="0" border="0">
<tr valign="top">
<td width="3%"><font size="2" face="serif">
<font face="serif" size="1">3)</font></font></td>
<td align="left">
<font face="serif" size="1">The amounts shown in Tables I and II represent the beneficial
ownership of the Issuer&#8217;s equity securities by JPM 23A SBIC, a portion of which may be deemed attributable to the
Reporting Person because it is the sole stockholder of J.P. Morgan Partners (23A SBIC Manager), Inc.
(&#8220;SBIC Manager&#8221;), the general partner of JPM 23A SBIC.  The actual pro rata portion of such beneficial
ownership that may be deemed to be attributable to the Reporting Person is not readily determinable because it is subject
to several variables, including the internal rate of return and vesting of interests within JPM 23A SBIC.</font></td>
</tr>
</table>
<table width="100%" cellspacing="0" cellpadding="0" border="0">
<tr valign="top">
<td width="3%"><font size="2" face="serif">
<font face="serif" size="1">4)</font></font></td>
<td align="left">
<font face="serif" size="1">The amounts shown in Tables I and II represent the beneficial
ownership of the Issuer&#8217;s equity securities by JPM 23A SBIC, a portion of which may be deemed attributable to the
Reporting Person because it is the sole stockholder of (a) The Chase Manhattan Bank, which is the sole stockholder of
SBIC Manager, and (b) JPMP Capital Corporation, which is the general partner of JPMP Master Fund Manager, L.P., limited
partner of JPM 23A SBIC.  The actual pro rata portion of such beneficial ownership that may be attributable to the
Reporting Person is not readily determinable because it is subject to several variables, including the internal rate of
return and vesting of interests within JPM 23A SBIC and its non-managing member.</font></td>
</tr>
</table>
</body>
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</TEXT>
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