Exhibit 23.3

CONSENT OF INDEPENDENT PETROLEUM ENGINEERS

We hereby consent to the incorporation by reference in this Amendment No. 1 to the Registration Statement on Form S-3 (the “Registration Statement”) of Carrizo Oil & Gas, Inc., a Texas corporation (the “Company”), of the information contained in our reserve report that is summarized as in our summary letter dated February 13, 2009, relating to the oil and gas reserves and revenue, as of December 31, 2008, of certain interests of the Company.

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

Fairchild & Stan

/s/ James W. Fairchild

James W. Fairchild

/s/ Peter W. Stan

Peter W. Stan

Houston, Texas

October 21, 2009