Abraxas-DMConsent-140314

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, 2013 on Certain Properties owned by Abraxas Petroleum Corporation,” “Appraisal Report as of December 31, 2012 on Certain Properties owned by Abraxas Petroleum Corporation,” “Appraisal Report as of December 31, 2011 on Certain Properties owned by Abraxas Petroleum Corporation,” and “Appraisal Report as of December 31, 2011 on Certain Properties owned by Blue Eagle Energy, LLC” (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 for the year ended December 31, 2013. We also consent to the inclusion of our letter report dated February 13, 2014 in the Annual Report on Form 10-K of Abraxas Petroleum Corporation as Exhibit 99.1. We further consent to the incorporation by reference in the Registration Statements on Form S-3 (333-188110) and Form S-8 (No. 333-17375, 333-17377, 033-81416, 333-55691, 333-74592, 333-74614, 333-135032, 333-153635, 333-162358, 333-168022, and 333-188117) of information from our Reports.