consentdm.htm

We hereby consent to the reference to DeGolyer and Mac Naughton and to the incorporation by reference of information of information taken from our “Appraisal Report as of December 31, 2008 on Certain Properties owned by Abraxas Petroleum Corporation,” “Appraisal Report as of December 31, 2008 on Certain Properties owned by Abraxas Energy Partners, L.P.,” “Appraisal Report as of December 31, 2007 on Certain Properties owned by Abraxas Petroleum Corporation,” “Appraisal Report as of December 31, 2007 on Certain Properties owned by Abraxas Energy Partners, L.P.,” and “Appraisal Report as of December 31, 2006 on Certain Properties owned by Abraxas Petroleum Corporation Special Case.” In the Registration Statement on Form S-3 of Abraxas Petroleum Corporation dated October 19, 2009