EXHIBIT 24

                            CARRIZO OIL & GAS, INC.

                               POWER OF ATTORNEY

                  WHEREAS, the undersigned, in his or her capacity as a
director or officer or both, as the case may be, of Carrizo Oil & Gas, Inc., a
Texas corporation (the "Company"), may be required to file with the Securities
and Exchange Commission (the "Commission") under Section 16 of the Securities
Exchange Act of 1934, as amended, and the rules and regulations promulgated
thereunder (collectively, the "Exchange Act"), Forms 3, 4 and 5 ("Forms")
relating to the undersigned's holdings of and transactions in securities of the
Company;

                  NOW, THEREFORE, the undersigned, in his or her capacity as a
director or officer or both, as the case may be, of the Company, does hereby
appoint Paul F. Boling, S.P. Johnson IV, and each of them severally, as his or
her true and lawful attorney-in-fact or attorneys-in-fact and agent or agents
with power to act with or without the other and with full power of substitution
and resubstitution, to execute in his or her name, place and stead, in his or
her capacity as a director or officer or both, as the case may be, of the
Company, Forms and any and all amendments thereto and any and all instruments
necessary or incidental in connection therewith, if any, and to file the same
with the Commission and any stock exchange or similar authority. Each said
attorney-in-fact and agent shall have full power and authority to do and
perform in the name and on behalf of the undersigned in any and all capacities,
every act whatsoever necessary or desirable to be done in the premises, as
fully and to all intents and purposes as the undersigned might or could do in
person, the undersigned hereby ratifying and approving the acts of said
attorney. The powers and authority of each said attorney-in-fact and agent
herein granted shall remain in full force and effect until the undersigned is
no longer required to file Forms under the Exchange Act, unless earlier revoked
by the undersigned by giving written notice of such revocation to the Company.
The undersigned acknowledges that the said attorneys-in-fact, in serving in
such capacity at the request of the undersigned, are not assuming, nor is the
Company assuming, any of the undersigned's responsibilities to comply with
Section 16 of the Exchange Act.

                  IN WITNESS WHEREOF, the undersigned has executed this
instrument this 28th day of February, 2005.


                                              /s/ Steven A. Webster
                                              -----------------------------
                                              Steven A. Webster