UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

      Date of Report (date of earliest event reported):  SEPTEMBER 30, 2004

                             CARRIZO OIL & GAS, INC.
             (Exact name of registrant as specified in its charter)

     Texas                   000-22915                  76-0415919
(State or other             (Commission             (I.R.S. Employer
jurisdiction of             File Number)           Identification No.)
 incorporation)

              14701 St. Mary's Lane
                  Suite 800
                Houston, Texas                             77079
             (Address of principal                      (Zip code)
               executive offices)



       Registrant's telephone number, including area code: (281) 496-1352

                                 Not applicable
         (Former name or former address, if changed since last report.)

Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions:

[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR
230.425)

[ ] Soliciting  material  pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)

[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))

[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))



Item 1.01.        ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT.

                  On September 30, 2004,  Carrizo Oil & Gas, Inc. (the "Company"
or "we")  entered  into a Second  Amended and  Restated  Credit  Agreement  with
Hibernia  National  Bank  and  Union  Bank  of  California,  N.A.  (the  "Credit
Facility"),  which matures on September 30, 2007.  The Credit  Facility  amends,
restates  and extends our prior  credit  facility  (such prior  facility  herein
referred to as the "Prior Credit  Facility").  The Credit Facility  provides for
(1) a revolving  line of credit of up to the lesser of the  Facility A Borrowing
Base and $75.0  million and (2) a term loan  facility of up to the lesser of the
Facility B Borrowing Base and $25.0 million.  It is secured by substantially all
of our assets and is guaranteed by our subsidiary.

                  The changes from the Prior Credit  Facility  include,  without
limitation,  (1) an increase in the  facility  amount,  (2) an  extension of the
maturity date from January 31, 2006 to September  30, 2007,  (3) the addition of
Union Bank of  California,  N.A.  as a lender,  (4)  provisions  permitting  the
incurrence of up to $25 million of  second-lien  subordinated  debt with another
lender (the  "Secured  Subordinated  Debt"),  (5) the ability to own and operate
unrestricted subsidiaries,  (6) the addition of a maximum total recourse debt to
EBITDA ratio, and (7) the substitution of a required minimum shareholders equity
covenant for a prior minimum tangible net worth requirement.

                  The  Facility  A  Borrowing  Bases will be  determined  by the
lenders  at  least  semi-annually  on each  November  1 and May 1.  The  initial
Facility A Borrowing  Base is $28.0  million.  The initial  Facility B Borrowing
Base is $0.00 and is  subject  to  determination  by the  lenders  in their sole
discretion.  We and the lenders may each request one unscheduled  borrowing base
determination  subsequent  to  each  scheduled  determination.  The  Facility  A
Borrowing  Base  will at all times  equal the  Facility  A  Borrowing  Base most
recently  determined by the lenders,  less quarterly  borrowing base  reductions
required subsequent to such determination. The lenders will reset the Facility A
Borrowing  Base amount at each  scheduled and each  unscheduled  borrowing  base
determination date.

                  If the  outstanding  principal  balance of the revolving loans
under the Credit  Facility  exceeds the  Facility A  Borrowing  Base at any time
(including,  without limitation, due to a quarterly borrowing base reduction (as
described  above)),  we have  the  option  within  30  days  to take  any of the
following  actions,  either  individually  or in  combination:  make a lump  sum
payment curing the deficiency,  pledge additional  collateral  sufficient in the
lenders'  opinion  to  increase  the  Facility  A  Borrowing  Base  and cure the
deficiency or begin making equal monthly  principal  payments that will cure the
deficiency  within the ensuing  six-month  period.  Those  payments  would be in
addition  to any  payments  that  may  come  due as a  result  of the  quarterly
borrowing base reductions.  Otherwise,  any unpaid principal or interest will be
due at maturity.

                  For each  revolving  loan,  the interest  rate will be, at our
option,  (1) the Eurodollar  Rate, plus an applicable  margin equal to 2.375% if
the amount  borrowed is greater than or equal to 90% of the Facility A Borrowing
Base, 2.0% if the amount borrowed is less than 90%, but greater than or equal to
50% of the Facility A Borrowing  Base, or 1.625% if the amount




borrowed  is less than 50% of the  Facility A  Borrowing  Base;  or (2) the Base
Rate, plus an applicable margin of 0.375% if the amount borrowed is greater than
or equal to 90% of the Facility A Borrowing Base. The interest rate on each term
loan will be, at our option,  (1) the Eurodollar Rate, plus an applicable margin
to be determined by the lenders; or (2) the Base Rate, plus an applicable margin
to be  determined  by the lenders.  Interest on  Eurodollar  Loans is payable on
either the last day of each  Eurodollar  option period or monthly,  whichever is
earlier. Interest on Base Rate Loans is payable monthly.

                  We are  subject  to certain  covenants  under the terms of the
Credit Facility,  including, but not limited to the maintenance of the following
financial  covenants:  (1) a  minimum  current  ratio  of 1.0 to 1.0  (including
availability  under the borrowing base),  (2) a minimum  quarterly debt services
coverage  of 1.25  times,  (3) a  minimum  shareholders  equity  equal to $100.0
million,  plus 100% of all subsequent common and preferred equity contributed by
shareholders  subsequent  to June 30,  2004,  plus 50% of all  positive  earning
occurring  subsequent  to June 30, 2004,  plus,  180 days after  issuance of any
Secured  Subordinated Debt, an amount equal to the difference,  if positive,  of
(A) 50% of the net proceeds  from the  issuance  less (B) 100% of all common and
preferred equity contributed by shareholders from September 30, 2004 to the date
of the  issuance  of any  Secured  Subordinated  Debt,  and (4) a maximum  total
recourse  debt to EBITDA ratio of not more than 3.0 to 1.0. The Credit  Facility
also places restrictions on additional indebtedness,  dividends to stockholders,
liens, investments, mergers, acquisitions, asset dispositions, asset pledges and
mortgages,  change of control,  repurchase or redemption  for cash of our common
stock, speculative commodity transactions and other matters.

Item 9.01.        FINANCIAL STATEMENTS AND EXHIBITS.

(c) Exhibits.



Exhibit Number       Description
--------------       -----------

                  
10.1                 Second Amended and Restated  Credit  Agreement  dated as of
                     September  30, 2004 by and among  Carrizo Oil & Gas,  Inc.,
                     CCBM, Inc.,  Hibernia  National Bank, as Agent,  Union Bank
                     of  California,  N.A.,  as co-agent and  Hibernia  National
                     Bank and Union Bank of California, N.A., as lenders

10.2                 Commercial  Guaranty  made and entered into as of September
                     30, 2004 by CCBM, Inc. in favor of Hibernia  National Bank,
                     as agent

10.3                 Amended and Restated  Stock  Pledge and Security  Agreement
                     dated and  effective  as of  September  30, 2004 by Carrizo
                     Oil & Gas,  Inc. in favor of  Hibernia  National  Bank,  as
                     agent




                                   SIGNATURES



                  Pursuant to the requirements of the Securities Exchange Act of
1934,  the  registrant has duly caused this report to be signed on its behalf by
the undersigned hereunto duly authorized.


                                      CARRIZO OIL & GAS, INC.




                                      By: /s/ Paul F. Boling
                                          ------------------
                                      Name:  Paul F. Boling
                                      Title: Vice President and
                                             Chief Financial Officer


Date:  October 6, 2004



                                INDEX TO EXHIBITS




Exhibit Number       Description
--------------       -----------

                  
10.1                 Second Amended and Restated  Credit  Agreement  dated as of
                     September  30, 2004 by and among  Carrizo Oil & Gas,  Inc.,
                     CCBM, Inc.,  Hibernia  National Bank, as Agent,  Union Bank
                     of  California,  N.A.,  as co-agent and  Hibernia  National
                     Bank and Union Bank of California, N.A., as lenders

10.2                 Commercial  Guaranty  made and entered into as of September
                     30, 2004 by CCBM, Inc. in favor of Hibernia  National Bank,
                     as agent

10.3                 Amended and Restated  Stock  Pledge and Security  Agreement
                     dated and  effective  as of  September  30, 2004 by Carrizo
                     Oil & Gas,  Inc. in favor of  Hibernia  National  Bank,  as
                     agent