Exhibit 23.1


            Consent of Independent Registered Public Accounting Firm



Abraxas Petroleum Corporation
San Antonio, Texas


We  hereby  consent  to the  incorporation  by  reference  in  the  Registration
Statements on Form S-3 (333-127480, 333-132971 and 333-143728) and Form S-8 (No.
333-17375, 333-17377, 033-81416, 333-55691,  333-74592,333-74614 and 333-135032)
of Abraxas Petroleum Corporation of our reports dated March 9, 2007, relating to
the  consolidated  financial  statements,   and  the  effectiveness  of  Abraxas
Petroleum Corporation's internal control over financial reporting, which appears
in the Annual Report to Shareholders, which is incorporated by reference in this
Annual Report on Form 10-K/A Number 2 .


BDO Seidman, LLP
Dallas, Texas

August 23, 2007






                                                                    Exhibit 23.3


                       Consent of DeGolyer and MacNaughton



     We consent to the use of the name DeGolyer and  MacNaughton,  to references
to DeGolyer and MacNaughton,  and to the inclusion of information taken from our
"Appraisal Report as of December 31, 2006 on Certain Properties owned by Abraxas
Petroleum  Corporation,"  "Appraisal  Report as of December  31, 2005 on Certain
Properties owned by Abraxas Petroleum  Corporation," and "Appraisal Report as of
December 31, 2004 on Certain Properties owned by Abraxas Petroleum  Corporation"
(our  reports)  under  the  sections  "Item  1  -  Business  General","  Item  2
Properties", "Primary Operating Areas" and "Reserves Information" in the Abraxas
Petroleum  Corporation  Annual Report on Form 10-K/A Number 2 for the year ended
December 31, 2006.


                                         DeGolyer and MacNaughton




Dallas, Texas
August 21, 2007