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): July 26, 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



Item 9.           REGULATION FD DISCLOSURE

                  The  Company   expects  to  disclose  the  following   updated
information regarding operations:

                    o    Currently,  the  Company has an  inventory  of over 180
                         potential drillsites.

                    o    Currently,  the Company has over 105 leased  drillsites
                         in inventory.

                    o    Currently,  the Company has  identified  75  additional
                         drilling sites in the Gulf Coast region.

                    o    Currently,  the Company has 26 identified  prospects in
                         inventory in the Frio/Vicksburg area.

                    o    Currently,  the Company has 23 identified  prospects in
                         the Southeast Texas area in its inventory.

                    o    Currently,  the Company has 47 identified  prospects in
                         the Wilcox area in its inventory.

                    o    Currently,  the Company has 22 identified  prospects in
                         the South Louisiana area in its inventory.

                  None  of  the   information   furnished  in  Item  9  and  the
accompanying  exhibit  will be deemed  "filed" for purposes of Section 18 of the
Securities  Exchange Act of 1934, not will it be  incorporated by reference into
any  registration  statement filed by Carrizo Oil & Gas under the Securities Act
of  1933,  as  amended,   unless   specifically   identified  therein  as  being
incorporated  therein by reference.  The  furnishing of the  information in this
report is not intended to, and does not, constitute a determination or admission
by  Carrizo  Oil & Gas,  that the  information  in this  report is  material  or
complete,  or that investors should consider this  information  before making an
investment decision with respect to any security of Carrizo Oil & Gas.

                  Statements in this report,  including but not limited to those
relating to the Company's or  management's  intentions,  beliefs,  expectations,
hopes, projections,  assessment of risks, estimations,  plans or predictions for
the future including potential drillsites or prospects and other statements that
are not  historical  facts  are  forward  looking  statements  that are based on
current  expectations.  Although the Company  believes that its expectations are
based  on  reasonable   assumptions,   it  can  give  no  assurance  that  these
expectations  will prove  correct.  Important  factors  that could cause  actual
results  to differ  materially  from  those in the  forward  looking  statements
include the results and dependence on exploratory drilling activities, operating
risks, oil and gas price levels, land issues, availability of equipment, weather
and other risks described in the Company's Form 10-K for the year ended December
31, 2003 and its other filings with the Securities and Exchange Commission.


                                       2


                                   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:  July 26, 2004