EXHIBIT 99.2


                            CERTIFICATION PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
        (SUBSECTIONS (a) AND (b) OF SECTION 1350, CHAPTER 63 OF TITLE 18,
                               UNITED STATES CODE)

         Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (Subsections
(a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), I,
Frank A. Wojtek, Chief Financial Officer of Carrizo Oil & Gas, Inc., a Texas
corporation (the "Company"), hereby certify, to my knowledge, that:

         (1)      the Company's Quarterly Report on Form 10-Q for the quarter
                  ended March 31, 2003 (the "Report") fully complies with the
                  requirements of Section 13(a) or 15(d) of the Securities
                  Exchange Act of 1934; and

         (2)      information contained in the Report fairly presents, in all
                  material respects, the financial condition and results of
                  operations of the Company.

Dated: May 12, 2003                    /s/ Frank A. Wojtek
                                       -----------------------------------------
                                       Name: Frank A. Wojtek
                                             Chief Financial Officer

The foregoing certification is being furnished solely pursuant to Section 906 of
the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter
63 of Title 18, United States Code) and is not being filed as part of the Report
or as a separate disclosure document.

A signed original of this written statement required by Section 906 has been
provided to Carrizo Oil & Gas, Inc. and will be retained by Carrizo Oil & Gas,
Inc. and furnished to the Securities and Exchange Commission or its staff upon
request.