Exhibit 23.3

                   CONSENT OF INDEPENDENT PETROLEUM ENGINEERS

     We hereby consent to the incorporation by reference in the Registration
Statements on Form S-8 (Registration Nos. 333-35245, 333-55838 and 333-116528);
(the "Registration Statements") of Carrizo Oil & Gas, Inc., a Texas corporation
(the "Company"), relating to the 1997 Incentive Plan of the Company of
information contained in our reserve report that is summarized as of December
31, 2004 in our summary letter dated March 29, 2005, relating to the oil and gas
reserves and revenue, as of December 31, 2004, of certain interests of the
Company.

     We hereby consent to all references to such reports, letters and/or to this
firm in each of the Registration Statement and the Prospectus to which the
Registration Statement relates, and further consent to our being named as an
expert in each of the Registration Statement and the Prospectus to which the
Registration Statement relates.


                                        RYDER SCOTT COMPANY, L.P.

Houston, Texas
March 29, 2005