Exhibit 23.1


              Registered Independent Public Accounting Firm Consent

We consent to the incorporation by reference in the Registration  Statements No.
33-48932, 33-48934,  33-72268,  33-81416, 33-81418,  333-17375, and 333-17377 of
Abraxas Petroleum Corporation on Form S-8 of our report dated February 28, 2005,
relating to the consolidated  financial statements,  which appears in the Annual
Report to Shareholders, which is incorporated in this Annual Report on Form10-K.



/s/BDO Seidman, LLP
March 29, 2005