Exhibit 23.3 [NSA LOGO] CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS --------------------------------------------------------- As independent petroleum engineers and geologists, we consent to the references to our firm, to our estimates of reserves and value of reserves and to our reports on reserves and the incorporation of our reports on reserves for the years ended 2001, 2002, and 2003 included in the W & T Offshore, Inc. Registration Statement on Form S-1 to be filed with the Securities and Exchange Commission on or about April 28, 2004 and any amendments thereto, and related prospectus of W & T Offshore, Inc. for the registration of securities. NETHERLAND, SEWELL & ASSOCIATES, INC. By: /s/ G. Lance Binder ---------------------------------- G. Lance Binder Executive Vice President Dallas, Texas April 28, 2004