UNITED STATES               OMB APPROVAL
                     SECURITIES AND EXCHANGE COMMISSION   OMB Number 3235-0058
                           Washington, D.C. 20549        Expires: March 31, 2006
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                                                         hours per response..2.5
                                FORM 12b-25
                                                           SEC FILE NUMBER
                       NOTIFICATION OF LATE FILING             0-19118
                                                            CUSIP NUMBER
                                                              003830106


(Check one):[X]Form 10-K  [ ]Form 20-F [ ]Form 11-K  [ ]Form 10-Q  [ ]Form 10-D
            [ ]Form N-SAR [ ]Form N-SAR

            For Period Ended: December, 31, 2005

            [ ] Transition Report on Form 10-K
            [ ] Transition Report on Form 20-F
            [ ] Transition Report on Form 11-K
            [ ] Transition Report on Form 10-Q
            [ ] Transition Report on Form N-SAR
            For the Transition Period Ended:________________

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  Read Instruction (on back page) Before Preparing Form. Please Print or Type.
    Nothing in this form shall be construed to imply that the Commission has
                   verified any information contained herein.
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If the notification relates to a portion of the filing checked above, identify
the Item(s) to which the notification relates:

PART I -- REGISTRANT INFORMATION

Abraxas Petroleum  Corporation
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Full Name of Registrant

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Former Name if Applicable

500 N. Loop 1604 East, Suite 100
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Address of Principal Executive Office (Street and Number)

San Antonio, Texas 78232
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City, State and Zip Code

PART II -- RULES 12b-25(b) AND (c)

If the subject report could not be filed without unreasonable effort or expense
and the registrant seeks relief pursuant to Rule 12b-25(b), the following should
be completed. (Check box if appropriate)

     |    (a)    The reasons described in reasonable detail in Part III of this
     |           form could not be eliminated  without  unreasonable  effort or
     |           expense
     |
     |    (b)    The subject  annual  report,  semi-annual  report,  transition
     |           report on Form 10-K,  Form 20-F, Form 11-K, Form N-SAR or Form
     |           N-CSR,  or  portion  thereof,  will be filed on or before  the
 [X] |           fifteenth  calendar day following the  prescribed due date; or
     |           the subject quarterly report or transition report on Form 10-Q
     |           or  subject  distribution  report  on Form  10-D,  or  portion
     |           thereof,  will be filed on or before  the fifth  calendar  day
     |           following  the  prescribed  due date;  and
     |
     |    (c)    The  accountant's  statement or other exhibit required by Rule
     |           12b-25(c) has been attached if applicable.

PART III -- NARRATIVE

State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q,10-D, N-SAR,
N-CSR, or the transition report or portion thereof, could not be filed within
the prescribed time period.

SEC 1344(03-05)Persons who are to  respond  to the  collection  of  information
               contained  in this form are not  required  to respond  unless the
               form displays a currently valid OMB control number.


Abraxas Petroleum  Corporation (the  "Registrant")  could not file its Form 10-K
for the year ended  December  31, 2005  without  unreasonable  effort or expense
because  the  Registrant  is  still  in the  process  of  providing  information
necessary  for its  independent  auditors  to  complete:  (i) their audit of the
Registrant's financial statements for the year ended December 31, 2005, and (ii)
their audit of  management's  assessment of the  effectiveness  of  Registrant's
internal control over financial  reporting as of December 31, 2005 in accordance
with Section 404 of the  Sarbanes-Oxley Act of 2002 and the related rules of the
Public Company Accounting Oversight Board.

The Registrant anticipates that it will be able to file its Form 10-K within the
additional 15 day period specified in Rule 12b-25(b)(2)(ii).


PART IV -- OTHER INFORMATION

(1) Name and telephone number of person to contact in regard to this
notification

Chris E. Williford                  210                          490-4788
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(Name)                          (Area Code)                  (Telephone Number)

(2)  Have all other periodic  reports  required under Section 13 or 15(d) of the
     Securities Exchange Act of 1934 or Section 30 of the Investment Company Act
     of 1940 during the preceding 12 months or for such shorter  period that the
     registrant  was required to file such  report(s)  been filed ? If answer is
     no, identify report(s).[X] Yes No[ ]

(3)  Is it anticipated that any significant change in results of operations from
     the corresponding  period for the last fiscal year will be reflected by the
     earnings  statements  to be  included  in the  subject  report  or  portion
     thereof? Yes [X] No [ ]

If so, attach an explanation of the  anticipated  change,  both  narratively and
quantitatively, and, if appropriate, state the reasons why a reasonable estimate
of the results cannot be made.

         On March 6, 2006,  the Company  furnished a Form 8-K to the  Securities
     and Exchange  Commission  incorporating  a press release that announced the
     Company's  financial results for the quarter and fiscal year ended December
     31,  2005.  The  Company  reported  net  income  in 2005,  from  continuing
     operations,  of $6.3 million (or $0.16 per share) compared to a net loss in
     2004 of $9.6  million (or $0.26 per  share),  from  continuing  operations,
     excluding  the income tax  benefit in 2004 of $6.1  million  related to the
     Grey Wolf IPO and the $12.6  million  gain on debt  redemption  booked as a
     result of the refinancing completed in October of 2004. Net income in 2005,
     including  discontinued  operations,  of $16.9 million (or $0.43 per share)
     compares  to net  income in 2004 of $12.4  million  (or  $0.34 per  share),
     including discontinued operations.

         On March 16,  2006,  the Company  issued a press  release  revising the
     previously reported earnings as a result of the accounting treatment of its
     gain on the  disposition  of Grey  Wolf in  February  2005.  The  change in
     accounting treatment resulted in an increase of $2.2 million in income from
     discontinued operations.

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                          Abraxas Petroleum Corporation
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                  (Name of Registrant as Specified in Charter)

has  caused  this  notification  to be signed on its  behalf by the  undersigned
hereunto duly authorized.

Date March 16, 2006                      By  /s/Chris E. Williford
     ---------------                     -----------------------------------
                                            Chris E. Williford
                                            Executive Vice President
                                            and Chief Financial Officer

INSTRUCTION: The form may be signed by an executive officer of the registrant or
by any other duly  authorized  representative.  The name and title of the person
signing  the form  shall  be typed or  printed  beneath  the  signature.  If the
statement is signed on behalf of the registrant by an authorized  representative
(other than an executive officer), evidence of the representative's authority to
sign on behalf of the registrant shall be filed with the form.


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  ATTENTION Intentional misstatements or omissions of fact constitute Federal
                   Criminal Violations (See 18 U.S.C. 1001).
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