EXHIBIT 10.1


Grey Wolf Exploration Inc.
Suite 1500, Sun Life Plaza
144 - 4th Avenue S.W.
Calgary, Alberta  T2P 3N4

- - and -

Abraxas Petroleum Corporation
500 N. Loop 1604 East, Suite 100
San Antonio, Texas 78270-1007
USA

Attention:        Robert L.G. Watson
                  Chief Executive Officer

Dear Sirs:

         We  understand  that Grey Wolf  Exploration  Inc.  (the  "Corporation")
proposes  to issue and sell an  aggregate  of  17,800,000  Common  Shares in the
capital of the Corporation (the "Treasury Shares") pursuant to this Agreement.

         We also understand that Abraxas Petroleum Corporation ("Abraxas" or the
"Selling  Shareholder") is the beneficial  owner of 13,002,360  Common Shares of
the Corporation,  being all of the outstanding  shares of the  Corporation,  and
proposes to sell  9,100,000  Common Shares of the  Corporation  owned by it (the
"Secondary Shares") pursuant to the terms set forth herein.

         Based upon the  foregoing and subject to the terms and  conditions  set
forth herein,  CIBC World Markets Inc.,  BMO Nesbitt Burns Inc.,  GMP Securities
Ltd. and Canaccord Capital  Corporation  (collectively,  the  "Underwriters" and
individually,  an  "Underwriter")  hereby  severally,  and not  jointly,  in the
respective  percentages  hereinafter  mentioned,  offer to purchase all, but not
less than all, of: (i) the Treasury  Shares from the  Corporation;  and (ii) the
Secondary  Shares from the Selling  Shareholder in each case at a purchase price
of $2.80 per share.  By their  respective  acceptance  hereof,  the  Corporation
agrees  to  issue  and to sell to the  Underwriters,  at the  Closing  Time  (as
hereinafter defined), all, but not less than all, of the Treasury Shares and the
Selling Shareholder agrees to sell to the Underwriters,  at the Closing Time (as
hereinafter defined), all, but not less than all, of the Secondary Shares.

         Upon and  subject to the terms and  conditions  contained  herein,  the
Selling   Shareholder   hereby  grants  to  the   Underwriters  an  option  (the
"Over-Allotment  Option")  to  purchase  from the  Selling  Shareholder,  at the
Underwriters'  election,  up to an  additional  3,902,360  Common  Shares of the
Corporation  (the  "Option  Shares") to cover  over-allotments,  if any, and for
market  stabilization  purposes.  The Over-Allotment  Option may be exercised in
whole or in part at any one time prior to 5:00 p.m.,  Calgary  time, on that day
which is thirty  calendar days after the Closing Date by written notice from the
Lead Underwriter,  on the Underwriters' behalf, to the Selling Shareholder (with
a copy to the Corporation),  setting forth the aggregate number of Option Shares
to be purchased.  If the Over-Allotment  Option is exercised,  the Option Shares
shall be purchased by the Underwriters  severally,  and not jointly, in the same
proportion as their  respective  obligations to purchase the Treasury Shares and



the  Secondary  Shares as set  forth in  section  17.1  hereof  and the  Selling
Shareholder  hereby  agrees  to  sell  such  number  of  Option  Shares  to  the
Underwriters at the purchase price of $2.80 per Option Share.

         To give effect to the foregoing,  the Underwriters  understand that the
Corporation  has filed a  preliminary  prospectus  dated  January  14, 2004 (the
"Preliminary  Prospectus")  and will file,  within the time limit in  accordance
with the terms set out below the final  prospectus  (the  "Prospectus")  and all
related  documents with the Securities  Commissions in each of the Jurisdictions
in order to qualify for distribution to the public the Offered Shares in each of
the Jurisdictions.

         In  consideration  of the agreement of the Underwriters to purchase the
Treasury Shares and the Secondary Shares and to offer them to the public, and in
consideration of the services rendered and to be rendered by the Underwriters in
connection therewith, each of the Corporation and the Selling Shareholder agrees
to pay to the  Underwriters,  at the  Closing  Time,  the  Underwriting  Fee (as
defined below).

                              Terms and Conditions

         The following are the terms and  conditions of the agreement  among the
Selling Shareholder, the Corporation and the Underwriters:

1.       Definitions

1.1      Where  used in this  Agreement,  the  following  terms  shall  have the
         following meanings:

         (a)   "affiliate"  has the  meaning  ascribed  thereto in the  Business
               Corporations Act (Alberta);

         (b)   "business day" means a day which is not a Saturday, a Sunday or a
               statutory or civic holiday in the City of Calgary, Alberta;

         (c)   "Canadian  Securities Laws" means,  collectively,  the applicable
               securities laws of each of the  Jurisdictions  and the respective
               regulations,   rules,   instruments,   rulings  and  orders  made
               thereunder and the  applicable  policy  statements  issued by the
               Securities Commissions thereunder;

         (d)   "Closing Date" means February 28, 2005, or such later date as may
               be  agreed  to in  writing  by the  Corporation  and the  Selling
               Shareholder and the Lead Underwriter but, in any event, such date
               shall be no later than March 28, 2005;

         (e)   "Closing  Time"  means 6:30 a.m.  (Calgary  time) on the  Closing
               Date,  or such  other  time on such  date as may be  agreed to in
               writing by the Corporation,  the Selling Shareholder and the Lead
               Underwriter;

         (f)   "Common  Shares"  means the common  shares in the  capital of the
               Corporation as constituted on the date hereof;

         (g)   "Corporation"  means Grey Wolf  Exploration  Inc., a  corporation
               incorporated under the Business Corporations Act (Alberta);

         (h)   "distribution"  means  "distribution"  or  "distribution  to  the
               public" of the Offered Shares, as the case may be, as those terms
               are defined in applicable Canadian Securities Laws;

                                       2


         (i)   "Financial  Information"  means all  financial  statements of the
               Corporation,  including:  the audited financial statements of the
               Corporation  for the 390 period  ended  December  31,  2003,  the
               unaudited  consolidated  comparative  financial statements of the
               Corporation  for the nine  months  ended  September  30, 2004 and
               2003,  the  auditor's   report  and   compilation   report,   the
               Corporation's management's discussion and analysis, and all other
               financial  information,  statistical and accounting data included
               in the Prospectus or Supplementary Materials;

         (j)   "Jurisdictions"  means each of the provinces and  territories  of
               Canada;

         (k)   "Lead Underwriter" means CIBC World Markets Inc.;

         (l)   "Loan Agreement" means the loan agreement dated effective October
               28,   2004  by  and  among  the  Selling   Shareholder   and  its
               subsidiaries as guarantors,  the lenders and Guggenheim Corporate
               Funding, LLC, as the arranger and administrative agent;

         (m)   "Material  Adverse  Effect" means any material  adverse effect on
               the business, operations or condition (financial or otherwise) of
               the Corporation, whether or not arising in the ordinary course of
               business;

         (n)   "material change",  "material fact" and "misrepresentation"  have
               the  meanings   attributed  thereto  under  applicable   Canadian
               Securities Laws;

         (o)   "MRRS"  means  the  mutual  reliance  review  system   procedures
               provided  for  under  National  Policy  43-201 - Mutual  Reliance
               Review System for Prospectuses and Annual Information Forms among
               the Securities Commissions;

         (p)   "MRRS Decision Document" means a final MRRS decision document for
               the Prospectus issued in accordance with MRRS;

         (q)   "Offered Shares" means the Treasury Shares,  the Secondary Shares
               and the Option Shares;

         (r)   "Option Closing Date" has the meaning specified in section 7.2;

         (s)   "Option  Closing  Time"  means  6:30 a.m.  (Calgary  time) on the
               Option  Closing  Date,  or such other time on the Option  Closing
               Date as may be  agreed  to in  writing  by the  Corporation,  the
               Selling Shareholder and the Lead Underwriter;

         (t)   "Pledge  Agreement" means the pledge and security agreement dated
               effective  October 28, 2004 by the Selling  Shareholder in favour
               of Guggenheim  Corporate  Funding,  LLC, as agent for the lenders
               party to the Loan Agreement;

         (u)   "Preliminary   Prospectus"   means  the  preliminary   long  form
               prospectus,  in the English and the French languages  (unless the
               context  indicates  otherwise),  of the Corporation dated January
               14, 2005,  relating to the  qualification for distribution of the
               Offered  Shares  as  filed  with  the   Securities   Commissions,
               including such prospectus as amended by any Prospectus Amendment;

         (v)   "Prospectus" means the final long form prospectus, in the English
               and  the  French   languages   (unless  the   context   indicates
               otherwise),  of the Corporation dated February 18, 2005, relating


                                       3


               to the  qualification  for  distribution of the Offered Shares as
               filed with the Securities Commissions,  including such prospectus
               as amended by any Prospectus Amendment;

         (w)   "Prospectus  Amendment"  means the  English  and French  language
               versions  of any  amendment  to the  Prospectuses  required to be
               prepared and filed by the Corporation  under applicable  Canadian
               Securities Laws;

         (x)   "Prospectuses"   means  the   Preliminary   Prospectus   and  the
               Prospectus;

         (y)   "Rule 144A" means Rule 144A promulgated under the U.S. Securities
               Act;

         (z)   "Securities  Commissions"  means the  securities  commissions  or
               similar  securities   regulatory   authorities  in  each  of  the
               Jurisdictions;

         (aa)  "Selling  Firms"  means the  Underwriters  and  other  investment
               dealers  and  brokers   with  which  the   Underwriters   have  a
               contractual  relationship  for the  distribution  of the  Offered
               Shares;

         (bb)  "Standard  Listing  Conditions"  means the conditions for listing
               and posting  for trading on the TSX of the Offered  Shares of the
               Corporation,  subject  only  to  satisfaction  of the  conditions
               imposed  by the  TSX  in its  letter  to  the  Corporation  dated
               February 11, 2005;

         (cc)  "subsidiary"  has the meaning  ascribed  thereto in the  Business
               Corporations Act (Alberta);

         (dd)  "Supplementary  Material"  means,  collectively,  any  Prospectus
               Amendment  and any  ancillary  material,  information,  evidence,
               return,  report,  application,  statement or document that may be
               filed  with the  Securities  Commissions  by or on  behalf of the
               Corporation under the Canadian Securities Laws;

         (ee)  "this  Agreement",  "hereto",  "herein",  "hereby",  "hereunder",
               "hereof" and similar expressions refer to the agreement resulting
               from  the   acceptance  by  the   Corporation   and  the  Selling
               Shareholder of this offer and not to any particular  paragraph or
               other portion of this Agreement;

         (ff)  "TSX" means the Toronto Stock Exchange;

         (gg)  "Underwriters" means, collectively,  CIBC World Markets Inc., BMO
               Nesbitt Burns Inc.,  GMP  Securities  Ltd. and Canaccord  Capital
               Corporation and individually, an "Underwriter";

         (hh)  "Underwriting  Fee" means the fee to be paid to the  Underwriters
               under this Agreement, such fee equalling 6% of the gross proceeds
               realized on the sale of the Offered Shares, or $0.168 per Offered
               Share in  consideration  of the  services  to be  provided by the
               Underwriters  under this Agreement and payable by the Corporation
               and the  Selling  Shareholder  rateably  based on the  number  of
               Offered Shares sold by each;

         (ii)  "United   States"  means  the  United  States  of  America,   its
               territories and  possessions,  any state of the United States and
               the District of Columbia;

                                       4


         (jj)  "U.S.  Exchange Act" means the United States Securities  Exchange
               Act of 1934, as amended;

         (kk)  "U.S.  Securities Act" means the United States  Securities Act of
               1933, as amended;

         (ll)  "U.S.  Securities  Laws" means all of the applicable  federal and
               state  securities  laws and  regulations  of the  United  States,
               including  without  limitation the U.S.  Securities Act, the U.S.
               Exchange Act and the respective  rules and regulations of the SEC
               thereunder; and

         (mm)  "Wrap"  means  the  information  memorandum  in  respect  of  the
               distribution  of the Offered  Shares to certain  investors in the
               United States.

2.       Qualification and Offering for Sale

2.1      The  Corporation  shall  forthwith  following  the  execution  of  this
         Underwriting Agreement,  file the Prospectus (in the English and French
         languages,  as  appropriate)  and other  documents  required  under the
         Canadian Securities Laws with the Securities Commissions,  shall obtain
         a MRRS Decision Document for the Prospectus from the Alberta Securities
         Commission  on its own  behalf  and on behalf  of the other  Securities
         Commissions  and  shall  otherwise  fulfil  all legal  requirements  to
         qualify the Offered  Shares for  distribution  to the public in each of
         the  Jurisdictions  through the Underwriters and Selling Firms (if any)
         registered in the applicable Jurisdiction,  in any event not later than
         February 21, 2005 (or such later date as may be agreed to in writing by
         the Underwriters).

2.2      Each of the Corporation and the Selling Shareholder further agrees that
         it shall,  until the earlier of (i) 90 days after the Closing Date; and
         (ii)  the date on which  the  distribution  of the  Offered  Shares  is
         completed,  promptly take or cause to be taken all additional steps and
         proceedings  that from time to time may be required  under the Canadian
         Securities   Laws  to  continue  to  qualify  the  Offered  Shares  for
         distribution  or, in the event that the Offered  Shares  have,  for any
         reason,  ceased to so qualify,  to again qualify the Offered Shares for
         distribution.

2.3      Prior to the filing of the Prospectus and Supplementary Materials, and,
         during the period of  distribution  of the Offered  Shares prior to the
         filing with any Securities Commissions of any Prospectus Amendment, the
         Corporation  and  the  Selling   Shareholder  shall  have  allowed  the
         Underwriters and their counsel to participate  fully in the preparation
         of, and to approve  the form of,  such  documents  (including,  without
         limitation,  the Wrap) and  shall  have  allowed  the  Underwriters  to
         conduct  all due  diligence  which the  Underwriters  may require to be
         conducted to fulfill their obligations as underwriters, and in order to
         enable the Underwriters to responsibly execute any certificate required
         by Canadian Securities Laws to be executed by the Underwriters.

2.4      The Corporation shall notify the Underwriters promptly, and confirm the
         notice in writing:

         (a)   of the receipt of any comments from any Securities Commission;

         (b)   of any request by any of the  Securities  Commissions to amend or
               supplement the Prospectus or for additional information; and

         (c)   of the issuance by any of the Securities Commissions or any stock
               exchange of any order having the effect of ceasing or  suspending
               the  distribution  of the  Offered  Shares or the  trading in any
               securities of the Corporation (collectively "Suspension Orders"),


                                       5


               or of the  institution  or, to the knowledge of the  Corporation,
               threatening of any proceedings for any such purpose.

2.5      The  Corporation  shall use every  reasonable  effort  to  prevent  the
         issuance of any Suspension  Order and, if any such order is issued,  to
         obtain the lifting thereof at the earliest possible time.

2.6      The Corporation shall not at any time file or make any amendment to the
         Prospectus or any Prospectus  Amendment of which the Underwriters shall
         not have  previously been advised and furnished a copy, or to which the
         Underwriters shall have objected, after reasonable notice thereof.

3.       Delivery of Prospectus and Related Opinions and Certificates

3.1      The Corporation and the Selling Shareholder shall cause to be delivered
         to the Underwriters and the Underwriters' counsel the documents set out
         below at the respective times indicated:

         (a)   on the date hereof,  or as soon as they are available,  copies of
               the  Prospectus,  signed  as  required  by any  of  the  Canadian
               Securities Laws, and a copy of the MRRS Decision Document for the
               Prospectus  as soon as  possible  after  such  document  has been
               obtained by the Corporation;

         (b)   as soon as they are available, copies of any Prospectus Amendment
               required to be filed under any of the Canadian  Securities  Laws,
               signed as required by the Canadian Securities Laws;

         (c)   as  soon   as   possible,   but  in  any   event   prior   to  or
               contemporaneously   with  the  filing  of  the  Prospectus   with
               securities authorities in the Province of Quebec:

               (i) an opinion of the Corporation's counsel in Quebec,  addressed
                   to the  Underwriters  and dated the date of the Prospectus in
                   form and  substance  acceptable to the  Underwriters,  acting
                   reasonably, to the effect that the French language version of
                   such document (except for the Financial  Information which is
                   the subject of the opinions of the Corporation's auditors, as
                   to which no opinion need be  expressed by Quebec  counsel) is
                   in all material respects a complete and proper translation of
                   the English language version; and

               (ii)an opinion of the  Corporation's  auditors  addressed  to the
                   Underwriters  and  dated  the date of the  Prospectus  or the
                   Prospectus  Amendment,  as the  case  may  be,  in  form  and
                   substance   satisfactory   to   the   Underwriters,    acting
                   reasonably, to the effect that the French language version of
                   the Financial  Information  set forth therein and as to which
                   no opinion  has been  expressed  by Quebec  counsel is in all
                   material respects a complete and accurate  translation of the
                   English language version; and

3.2      At the time of delivery of the Prospectus to the Underwriters  pursuant
         to section 3.1 above the Corporation and the Selling  Shareholder shall
         cause to be delivered to the Underwriters:

         (a)   evidence satisfactory to the Underwriters,  acting reasonably, of
               the approval of the listing and posting for trading on the TSX of
               the  Offered   Shares,   subject  only  to  satisfaction  by  the
               Corporation of the Standard Listing Conditions;

                                       6


         (b)   a "long-form" comfort letter dated the date of the Prospectus, in
               form and substance satisfactory to the Underwriters, addressed to
               the  Underwriters  and the directors of the Corporation  from BDO
               Dunwoody LLP, with reference to those matters as the Underwriters
               may reasonably request including:

               (i) to  the  effect  that,  in  their   opinion,   the  Financial
                   Information   examined  by  them  complies  in  all  material
                   respects   with  all   applicable   accounting   requirements
                   including,  without  limitation,  Canadian generally accepted
                   accounting   principles   and   the   applicable   accounting
                   requirements  of the Canadian  Securities Laws of each of the
                   Jurisdictions and related published rules and regulations;

               (ii)verification  of the Financial  Information  contained in the
                   Prospectus  and  matters  involving  changes or  developments
                   since the respective  dates as of which  specified  Financial
                   Information  is given in the  Prospectus,  to a date not more
                   than two business days prior to the date of the letter; and

               (iii) that the auditors of the Corporation are independent public
                   accountants as required by the Canadian Securities Laws,

                  which letter will be in addition to the auditors' report or
                  compilation report, as applicable, contained in the Prospectus
                  and any auditors' consent and comfort letters addressed to the
                  Securities Commissions;

3.3      The  Corporation  and the  Selling  Shareholder  shall  deliver  to the
         Underwriters,  as soon as  practicable  and in any event not later than
         noon  (local  time)  on  February  22,  2005  at  offices  in  Calgary,
         Vancouver, Toronto and Montreal, the number of commercial copies of the
         Prospectus (and the Wrap as may be required),  as the Underwriters have
         specified to the Corporation on or before the date hereof.

3.4      The  Corporation  and the Selling  Shareholder  shall from time to time
         deliver to the  Underwriters  as soon as  practicable at the offices in
         such  Canadian  cities  designated  by the  Underwriters  the number of
         commercial  copies of any Prospectus  Amendment (and the Wrap as may be
         required),  which the  Underwriters  may from  time to time  reasonably
         request.

3.5      Each  delivery of the  Prospectus  or any  Prospectus  Amendment by the
         Corporation  and the  Selling  Shareholder  to the  Underwriters  shall
         constitute:

         (a)   the  Corporations' and the Selling  Shareholders'  representation
               and warranty to the Underwriters that, at the respective times of
               such delivery:

               (i) the information and statements contained in the Prospectus or
                   any  Prospectus  Amendment,  as the case may be,  (except any
                   information   and   statements   relating   solely   to   the
                   Underwriters)  constitutes full, true and plain disclosure of
                   all material facts relating to the Offered Shares; and

               (ii)the Prospectus or any Prospectus  Amendment,  as the case may
                   be, does not contain a misrepresentation.

         (b)   consent by the Corporation and the Selling Shareholder to the use
               by the  Underwriters  and  other  Selling  Firms (if any) of such


                                       7


               documents  in  connection  with the  distribution  of the Offered
               Shares  for sale in all of the  Jurisdictions  (and in the United
               States as contemplated herein).

3.6      The Corporation and the Selling Shareholder hereby represents, warrants
         and covenants to the  Underwriters  that each  document  filed or to be
         filed with any of the  Securities  Commissions  complied or will comply
         when so filed and at the Closing  Time in all  material  respects  with
         applicable Canadian Securities Laws.

4.       Distribution and Certain Obligations of the Underwriters

4.1      The Underwriters  shall offer the Offered Shares for sale to the public
         directly and through other Selling Firms upon the terms and  conditions
         set forth in the Prospectus and this Agreement.  The Underwriters shall
         comply,  and shall  require each of the other  Selling Firms to comply,
         with all applicable laws and regulations in each  jurisdiction into and
         from which they may offer or sell the Offered Shares.  The Underwriters
         will not solicit offers to purchase or sell the Offered Shares so as to
         require  registration  of the Offered Shares or filing of a prospectus,
         registration  statement or other notice or document with respect to the
         distribution  of the Offered Shares under the laws of any  jurisdiction
         other than the  Jurisdictions  and the  Underwriters  will not  solicit
         offers to  purchase  or sell the  Offered  Shares in the United  States
         except on the basis of the terms and  conditions  set forth in Schedule
         "A" hereto,  and will require each other Selling Firm to agree with the
         Underwriters not to so solicit or sell.

4.2      The Underwriters shall use their reasonable  commercial efforts (taking
         into account the respective interests of the Selling  Shareholder,  the
         Corporation and the Underwriters) to complete, and to cause the Selling
         Firms to complete,  the  distribution  of the Offered Shares as soon as
         possible after the Closing Time.

4.3      The Lead  Underwriter  shall  notify the  Corporation  and the  Selling
         Shareholder   promptly  when,  in  the   Underwriters'   opinion,   the
         distribution  of the Offered  Shares has been completed and provide the
         Corporation and the Selling  Shareholder in writing with a breakdown of
         the number of Offered Shares  distributed in each of the  Jurisdictions
         where such  breakdown is required for the purpose of  calculating  fees
         payable to the Securities Commission in each jurisdiction where Offered
         Shares were distributed.

4.4      For the purposes of this section 4, the Underwriters  shall be entitled
         to assume that the Offered  Shares are  qualified for  distribution  in
         each of the Jurisdictions unless the Underwriters receive notice to the
         contrary from the Corporation or any applicable Securities Commission.

4.5      An  Underwriter  shall not be liable to the Selling  Shareholder or the
         Corporation  under this  section  with  respect to a default by another
         Selling Firm if the Underwriter is not also in default.

5.       Material Changes

5.1      During  the  period  from  the date  hereof  to the  completion  of the
         distribution  of the Offered  Shares,  the Selling  Shareholder and the
         Corporation  (other than  information or statements  relating solely to
         the Underwriters), shall promptly notify the Underwriters in writing of
         the full particulars of:

         (a)   any  change   (actual,   contemplated   or   threatened)  in  the
               properties,  business, affairs,  operations,  assets, liabilities
               (contingent   or   otherwise),   capital  or   ownership  of  the
               Corporation;

                                       8


         (b)   any change in any matter covered by a statement  contained in the
               Prospectuses or Supplementary Material; or

(c)               the occurrence of any other fact or event;

         which  change,  fact or event  is,  or may be,  of such a nature  as to
         render the Prospectuses or Supplementary Materials misleading or untrue
         in any  material  respect  or  would  result  in any of such  documents
         containing  a  misrepresentation  (as  defined  in the  Securities  Act
         (Alberta)) or which would result in any of such documents not complying
         with the Canadian Securities Laws or which would reasonably be expected
         to have a  significant  effect  on the  market  price  or  value of any
         securities of the Corporation.

         The Selling  Shareholder or the  Corporation,  as applicable,  shall in
         good faith  discuss  with the  Underwriters  any change,  fact or event
         (actual or  proposed  within its  knowledge)  which is of such a nature
         that there is  reasonable  doubt  whether  notice  need be given to the
         Underwriters  pursuant  to this  section  and,  in any event,  prior to
         making any filing referred to in section 5.2.

5.2      The  Corporation  shall  comply with all  applicable  filings and other
         requirements,   including  subsection  115(1)  of  the  Securities  Act
         (Alberta)  and with the  comparable  provisions  of the other  Canadian
         Securities  Laws, and the  Corporation  shall prepare and file promptly
         any required Prospectus Amendment,  or any Supplementary Material which
         may be necessary or advisable and will otherwise  comply with all legal
         requirements  necessary  to continue to qualify the Offered  Shares for
         distribution   in  each  of  the   Jurisdictions   for  the  period  of
         distribution  of the Offered  Shares.  The  Corporation and the Selling
         Shareholder  shall allow  Underwriters and their respective  counsel to
         participate  fully in the  preparation of any Prospectus  Amendment and
         any  amendment  to any  Supplementary  Material  and  shall  allow  the
         Underwriters   and  their   counsel  to  conduct   all  due   diligence
         investigations  which the Underwriters may reasonably  require in order
         to fulfil their  obligations as underwriters and in order to enable the
         Underwriters  responsibly  to execute  the  certificate  required to be
         executed by them in any Prospectus Amendment.

6.       Representations and Warranties

6.1      The Selling Shareholder represents and warrants to the Underwriters and
         the  Corporation,  and  acknowledges  that  the  Underwriters  and  the
         Corporation  are relying thereon in connection with the purchase by the
         Underwriters of the Offered Shares, that:

         (a)   the Selling Shareholder is duly incorporated and validly existing
               under the laws of its jurisdiction of incorporation or formation;

         (b)   the Selling  Shareholder has the corporate power and authority to
               enter into and to perform its obligations under this Agreement;

         (c)   all  necessary  corporate  action has been  taken by the  Selling
               Shareholder to authorize the execution,  delivery and performance
               of this Agreement and the  transactions  contemplated  hereby and
               this  Agreement  has been  duly  executed  and  delivered  by the
               Selling  Shareholder and  constitutes a legal,  valid and binding
               obligation  of the Selling  Shareholder  enforceable  against the
               Selling  Shareholder in accordance with its terms, except as such
               enforceability   may  be  limited  by   bankruptcy,   insolvency,
               reorganization,  moratorium and other similar laws relating to or
               affecting  creditors'  rights  generally,  by  general  equitable
               principles   (regardless  of  whether  such   enforceability   is
               considered  in a  proceeding  in equity or law) and as limited by


                                       9


               the  unenforceability  under certain  circumstances  under law or
               court decisions of provisions  providing for the  indemnification
               or contribution to a party with respect to a liability where such
               indemnification or contribution is contrary to public policy;

         (d)   the execution,  delivery and performance of this Agreement by the
               Selling Shareholder and the sale and delivery at the Closing Time
               and the Option Closing Time, as the case may be, of the Secondary
               Shares and the Option  Shares,  as the case may be,  assuming the
               Selling  Shareholder  has  obtained  all  necessary  consents and
               releases from the parties to the Loan Agreement,  do not and will
               not result in a material  breach of, and do not create a state of
               facts which,  after notice or lapse of time or both,  will result
               in a material  breach or permit  acceleration  or termination (if
               applicable) of and do not and will not  materially  conflict with
               or constitute a material default under:

               (i) any term or provision of the articles, by-laws or resolutions
                   of the Selling Shareholder;

               (ii)any of the terms,  conditions or provisions of any indenture,
                   mortgage,  note, contract,  agreement,  instrument,  lease or
                   other document to which the Selling Shareholder is a party or
                   by which the Selling  Shareholder is contractually  bound and
                   which  materially  affects or may  reasonably  be expected to
                   materially  affect  the  business,  operations  or  financial
                   condition of the Selling Shareholder; or

               (iii) any law,  statute,  rule or  regulation  applicable  to the
                   Selling Shareholder, or any judgement, order or decree of any
                   government,   governmental,   regulatory  or   administrative
                   agency,  authority,  commission or  instrumentality  or court
                   having jurisdiction over the Selling Shareholder;

         (e)   the  Secondary  Shares and the  Option  Shares  are  legally  and
               beneficially owned by the Selling Shareholder;

         (f)   at the Closing Time or at the Option Closing Time, as applicable,
               assuming  the Selling  Shareholder  has  obtained  all  necessary
               consents and releases from the parties to the Loan Agreement, the
               Selling  Shareholder  will have good and marketable  title to the
               Secondary  Shares and Option  Shares free and clear of all liens,
               charges,  security  interests and encumbrances of whatever nature
               and kind and the Selling  Shareholder will have full legal right,
               power and  authority to sell,  assign and transfer the  Secondary
               Shares  and the Option  Shares to the  Underwriters  without  any
               consent of any person which has not been obtained;

         (g)   upon delivery of the  Secondary  Shares and the Option Shares and
               payment of the purchase  price  therefor as herein  contemplated,
               the  Secondary  Shares and the Option  Shares will be acquired by
               the Underwriters at the Closing Time free and clear of all liens,
               charges, security interests and encumbrances of whatsoever nature
               and  kind   created  or   permitted   to  exist  by  the  Selling
               Shareholder;

         (h)   except  to the  extent  set forth in the Loan  Agreement  and the
               Pledge  Agreement,  no person,  firm or  corporation  (except the
               Underwriters)  has any  agreement,  option,  right  or  privilege
               (whether  pre-emptive,   contractual  or  otherwise)  capable  of
               becoming  an  agreement   for  the  purchase   from  the  Selling
               Shareholder of any of the Secondary Shares and the Option Shares;

                                       10


         (i)   other than as may be required under Canadian Securities Laws, the
               U.S.  Securities  Laws or any United  States state  securities or
               "blue  sky"  laws,   or  as   required  to  be  obtained  by  the
               Corporation, no filing with, or authorization, approval, consent,
               license,  order,  registration,  qualification  or decree of, any
               court  or  governmental  authority  or  agency  is  necessary  or
               required for the  performance  by the Selling  Shareholder of its
               obligations hereunder, in connection with the offering or sale of
               the  Secondary  Shares and the  Option  Shares  hereunder  or the
               consummation of the transactions  contemplated by this Agreement,
               except such as have been obtained;

         (j)   there is no action,  suit,  proceeding,  inquiry or investigation
               before  or   brought  by  any  court  or   governmental   agency,
               governmental  instrumentality or body,  domestic or foreign,  now
               pending  or,  to  the   knowledge  of  the  Selling   Shareholder
               threatened against or affecting the Selling Shareholder, which is
               required to be  disclosed in the  Prospectus  and which is not so
               disclosed, or which if determined adversely,  would reasonably be
               expected to materially and adversely  affect the  consummation of
               the   transactions   contemplated   in  this   Agreement  or  the
               performance  by  the  Selling   Shareholder  of  its  obligations
               hereunder;

         (k)   the Selling  Shareholder  is not  prompted to sell the  Secondary
               Shares and the Option Shares by any  information  concerning  the
               Corporation  which is  required to be but is not set forth in the
               Prospectuses and Supplementary Materials; and

         (l)   other  than as  permitted  by  applicable  securities  laws,  the
               Selling  Shareholder  has not distributed and will not distribute
               the  Prospectuses  or any other  offering  material in connection
               with the offering or sale of the Offered Shares.

6.2      The  Corporation  represents and warrants to the  Underwriters  and the
         Selling  Shareholders  and  acknowledges  that the Underwriters and the
         Selling Shareholder are relying thereon in connection with the purchase
         by the Underwriters of the Offered Shares, that:

         (a)   the Corporation is duly  incorporated  and validly existing under
               the laws of the Province of Alberta;

         (b)   the Corporation has the corporate power and authority to carry on
               its  business  as  described  in the  Prospectuses,  to  own  its
               property  and  assets  and  to  enter  into  and to  perform  its
               obligations under this Agreement;

         (c)   the  authorized  capital  of  the  Corporation   consists  of  an
               unlimited  number of Common Shares,  of which  13,002,360  Common
               Shares are issued and  outstanding  as of the date hereof  (after
               giving effect to the share split);

         (d)   all of the issued and  outstanding  shares in the  capital of the
               Corporation  including the Secondary Shares and the Option Shares
               have been duly  authorized  and validly issued and are fully paid
               and  non-assessable  and have been issued in compliance  with all
               Canadian Securities Laws;

         (e)   all necessary  corporate action has been taken by the Corporation
               to validly issue the Treasury Shares to the  Underwriters and the
               Treasury  Shares when issued,  will have been  validly  issued as
               fully paid and non-assessable shares;

                                       11


         (f)   all necessary  corporate action has been taken by the Corporation
               to authorize  the  execution,  delivery and  performance  of this
               Agreement and this Agreement has been duly executed and delivered
               by the  Corporation  and  constitutes a legal,  valid and binding
               obligation of the Corporation enforceable against the Corporation
               in accordance with its terms;

         (g)   the  attributes  of the Common  Shares  conform  in all  material
               respects   with  the   description   thereof   contained  in  the
               Prospectuses;

         (h)   the Corporation  does not have any material  subsidiaries and the
               Corporation  does not own,  directly  or  indirectly,  nor has it
               agreed to acquire outstanding securities of any other corporation
               or options to acquire securities of any other corporation;

         (i)   except other than as disclosed  in the  Prospectuses  or as could
               not, individually or in the aggregate,  reasonably be expected to
               result  in  a  Material   Adverse  Effect,   the  Corporation  is
               conducting its business in compliance  with all applicable  laws,
               rules and regulations of each jurisdiction in which it carries on
               business and holds all licenses, registrations and qualifications
               in all jurisdictions in which it carries on business necessary to
               carry on its business as now conducted;

         (j)   no person, firm or corporation has any agreement,  option,  right
               or privilege  (whether  pre-emptive,  contractual  or  otherwise)
               capable of becoming an agreement for the  purchase,  acquisition,
               subscription  or issuance of any of the unissued  shares or other
               securities  of the  Corporation  other than  pursuant to existing
               employee  benefit,   incentive  or  stock  option  plans  of  the
               Corporation and other than as disclosed in the Prospectuses;

         (k)   other  than as  disclosed  in the  Prospectuses  or as could not,
               individually  or in the  aggregate,  reasonably  be  expected  to
               result in a Material  Adverse  Effect,  no default  exists in the
               performance or observance of any material obligation,  agreement,
               covenant or condition contained in any contract,  indenture, loan
               agreement,  note, lease or other agreement or instrument to which
               the Corporation is a party;

         (l)   the execution,  delivery and performance of this Agreement by the
               Corporation  and the sale and delivery at the Closing Time of the
               Offered  Shares do not and will not result in a  material  breach
               of, and do not  create a state of facts  which,  after  notice or
               lapse of time or both, will result in a material breach or permit
               acceleration  or  termination  (if  applicable) of and do not and
               will not conflict with or constitute a default under:

               (i) any term or provision of the articles, by-laws or resolutions
                   of the Corporation;

               (ii)any of the terms,  conditions or provisions of any indenture,
                   mortgage,  note, contract,  agreement,  instrument,  lease or
                   other  document  to which  the  Corporation  is a party or by
                   which the Corporation is  contractually  bound other than any
                   such   breaches,   conflicts  or  defaults  which  could  not
                   reasonably be expected to have a Material Adverse Effect; or

               (iii) any law,  statute,  rule or  regulation  applicable  to the
                   Corporation,  or  any  judgement,  order  or  decree  of  any
                   government,   governmental,   regulatory  or   administrative
                   agency,  authority,  commission or  instrumentality  or court
                   having  jurisdiction over the Corporation other than any such


                                       12


                   breaches, conflicts or defaults which could not reasonably be
                   expected to have a Material Adverse Effect;

         (m)   other  than as  disclosed  in the  Prospectuses  or as could not,
               individually or in the aggregate,  reasonably be expected to have
               a  Material  Adverse  Effect,  there has been no  adverse  change
               (actual,   anticipated,   contemplated  or  threatened,   whether
               financial or  otherwise) in the  business,  affairs,  operations,
               assets  or   liabilities   (contingent   or   otherwise)  of  the
               Corporation or the capital of the Corporation  since December 31,
               2003;

         (n)   the financial  statements  incorporated in the  Prospectuses  and
               notes  thereto,  present  fairly  in all  material  respects  the
               financial  position of the Corporation at the dates indicated and
               the  statements of  operations  and deficit and cash flows of the
               Corporation  for  the  periods  specified;   and  such  financial
               information  has  been  prepared  in  accordance  with  generally
               accepted accounting  principles in Canada applied on a consistent
               basis throughout the periods involved and the selected  financial
               information and the summary financial information included in the
               Prospectuses   present  fairly  in  all  material   respects  the
               information  shown  therein  and have  been  compiled  on a basis
               consistent with that of the financial statements;

         (o)   the  description of the assets and liabilities of the Corporation
               set forth in the  financial  statements  fairly  presents  in all
               material   respects,   in  accordance  with  generally   accepted
               accounting  principles  in Canada,  the  financial  position  and
               condition of the Corporation as at the dates thereof and reflects
               all  material  liabilities  (absolute,   accrued,  contingent  or
               otherwise) of the Corporation as at the dates thereof;

         (p)   other than as disclosed in the  Prospectus,  to the  knowledge of
               the  Corporation,  there are no actions,  suits,  proceedings  or
               inquiries   pending  or  threatened   against  or  affecting  the
               Corporation at law or in equity or before or by any  governmental
               department,  commission, board, bureau, agency or instrumentality
               which in any way could  reasonably be expected to have a Material
               Adverse   Effect,   or  which  could   prevent  or  restrict  the
               distribution of the Offered Shares;

         (q)   other than as disclosed  in the  Prospectus,  since  December 31,
               2003, the Corporation  has not incurred,  assumed or suffered any
               liability (absolute, accrued, contingent or otherwise) or entered
               into any transaction which could reasonably be expected to have a
               Material Adverse Effect;

         (r)   other  than as  disclosed  in the  Prospectuses  or as could not,
               individually or in the aggregate,  reasonably be expected to have
               a Material  Adverse  Effect,  the  Corporation  owns or possesses
               adequate and  enforceable  rights to use all trade  marks,  trade
               mark  applications,   trade  names,  service  marks,  copyrights,
               copyright  applications,  licences,  know-how  and other  similar
               rights  (collectively,   the  "Intangibles")  necessary  for  the
               conduct of its business as now being  conducted  and as described
               in the  Prospectuses  and to the  knowledge  of the  Corporation,
               exercising reasonable care, the Corporation has not infringed, is
               infringing,  or has received any notice on  infringement  of, any
               Intangible of any other person;

         (s)   other  than as  disclosed  in the  Prospectuses  or as could  not
               reasonably be expected to have a Material Adverse Effect,  at the
               Closing Time the Corporation  will have good and marketable title
               to, or leasehold  interests  in, all  properties  and assets,  as


                                       13


               described in the Prospectuses owned by the Corporation,  free and
               clear of all liens, charges, encumbrances or restrictions;

         (t)   to the  knowledge  of the  Corporation,  neither  any  Securities
               Commission,  the TSX nor any  similar  regulatory  authority  has
               issued any order which is  currently  outstanding  preventing  or
               suspending  trading in any securities of the  Corporation and the
               Corporation  is not in default  of any  material  requirement  of
               applicable Canadian Securities Laws;

         (u)   to the  knowledge of the  Corporation,  none of the directors and
               officers of the  Corporation  is now, or has ever been subject to
               an order or  ruling of any  securities  regulatory  authority  or
               stock  exchange  prohibiting  such  individual  from  acting as a
               director or officer of a public company or of a company listed on
               a particular stock exchange;

         (v)   the TSX has  conditionally  approved  the listing and posting for
               trading  on the  TSX  the  Offered  Shares,  subject  only to the
               Standard Listing Conditions;

         (w)   the  Corporation  is  in  compliance  with  all  laws  respecting
               employment  and  employment  practices,  terms and  conditions of
               employment,   pay   equity   and   wages,   except   where   such
               non-compliance would not result in a Material Adverse Effect, and
               has not and is not engaged in any unfair labour practice;

         (x)   no labour  dispute with the employees of the  Corporation  exists
               or, to the  knowledge of the  Corporation,  is imminent,  and the
               Corporation  is not  aware  of any  existing  or  imminent  labor
               disturbance  by the employees of any of its principal  suppliers,
               manufacturers, customers or contractors, which, in any such case,
               could reasonably be expected to have a Material Adverse Effect;

         (y)   other than as may be required under the Canadian Securities Laws,
               or as required to be  obtained  by the  Selling  Shareholder,  no
               filing with, or authorization, approval, consent, license, order,
               registration,   qualification   or  decree   of,   any  court  or
               governmental authority or agency is necessary or required for the
               performance by the Corporation of its obligations  hereunder,  in
               connection  with  the  offering  or  sale of the  Offered  Shares
               hereunder or the consummation of the transactions contemplated by
               this Agreement, except such as have been obtained;

         (z)   except  in  each  case  as  could  not,  individually  or in  the
               aggregate,  reasonably  be  expected  to have a Material  Adverse
               Effect:

               (i)  the  Corporation   possesses  such  permits,   certificates,
                    licences,   approvals,  consents  and  other  authorizations
                    (collectively,  the  "Governmental  Licenses") issued by the
                    appropriate  federal,  provincial,  state,  local or foreign
                    regulatory  agencies  or bodies  necessary  to  conduct  the
                    business now operated by it;

               (ii) the   Corporation  is  in  compliance  with  the  terms  and
                    conditions of all such Governmental Licenses;

               (iii)all such  Governmental  Licenses are valid and in full force
                    and effect; and

               (iv) to  the  knowledge  of the  Corporation,  no  revocation  or
                    limitation of any of such  Governmental  Licenses is pending
                    or  threatened  and the  Corporation  is not in  default  or
                    violation of any  thereof,  and the sale and delivery of the
                    Offered  Shares  does  not and will not  conflict  with,  or


                                       14


                    result in a breach of any of the terms or provisions  of, or
                    constitute  a  default  under,  any  of  such   Governmental
                    Licenses;

         (aa)  other  than as  disclosed  in the  Prospectuses  or as could not,
               individually or in the aggregate,  reasonably be expected to have
               a Material Adverse Effect:

               (i)  the   Corporation  is  not  in  violation  of  any  federal,
                    provincial, state, local, municipal or foreign statute, law,
                    rule, regulation,  ordinance, code, policy or rule of common
                    law  or  civil  law  or  any   judicial  or   administrative
                    interpretation   thereof,    including   any   judicial   or
                    administrative order, consent, decree or judgment,  relating
                    to  the  pollution  or  protection  of  human  health,   the
                    environment  (including,  without  limitation,  ambient air,
                    surface  water,  groundwater,  land  surface  or  subsurface
                    strata) or wildlife, including, without limitation, laws and
                    regulations relating to the release or threatened release of
                    chemicals,    pollutants,    contaminants,    waste,   toxic
                    substances,  hazardous  substances,  petroleum  or petroleum
                    products  (collectively,  "Hazardous  Materials")  or to the
                    manufacture,   processing,   distribution,  use,  treatment,
                    storage,  disposal,   transport  or  handling  of  Hazardous
                    Materials (collectively, "Environmental Laws");

               (ii) the   Corporation  has  all  permits,   authorizations   and
                    approvals  required under any applicable  Environmental Laws
                    and is in compliance with the requirements thereunder;

               (iii)to the  knowledge of the  Corporation,  there are no pending
                    or   threatened   administrative,   regulatory  or  judicial
                    actions,  suits,  demands,  demand letters,  claims,  liens,
                    notices of  non-compliance  or violation,  investigation  or
                    proceedings  relating to any Environmental  Laws against the
                    Corporation; and

               (iv) to the knowledge of the Corporation,  there are no events or
                    circumstances  that might reasonably be expected to form the
                    basis  of any  order  for  clean  up or  remediation,  or an
                    action,   suite  or  proceeding  by  any  private  party  or
                    governmental  body  or  agency,  against  or  affecting  the
                    Corporation   relating   to   Hazardous   Material   or  any
                    Environmental Laws;

         (bb)  other  than as  disclosed  in the  Prospectuses  or as could not,
               individually or in the aggregate,  reasonably be expected to have
               a  Material  Adverse  Effect,   the  Corporation  has  filed  all
               necessary federal, state,  provincial,  local and foreign income,
               payroll,  franchise and other tax returns and have paid all taxes
               shown as due thereon or with respect to any of its  properties or
               any  transactions to which they are a party,  and there is no tax
               deficiency  that has been, or is likely to be,  asserted  against
               the Corporation or any of its properties or assets;

         (cc)  other  than as  disclosed  in the  Prospectuses  or as could not,
               individually or in the aggregate,  reasonably be expected to have
               a Material Adverse Effect, the Corporation is insured by insurers
               of recognized  financial  responsibility  against such losses and
               risks and in such amounts as are  customary in the  businesses in
               which they engage or propose to engage,  and the  Corporation has
               no  reason  to  believe  that it will not be able to renew  their
               existing  insurance coverage as and when such coverage expires or


                                       15


               obtain similar coverage from similar insurers as may be necessary
               to  continue  its  business  at a  similar  cost to that of their
               existing coverage;

         (dd)  other than as disclosed in the Prospectus,  the Corporation  does
               not owe any money to, nor has the  Corporation  any present loans
               to, or borrowed any monies from, or is otherwise  indebted to any
               officer,  director,  employee,  shareholder  or  any  person  not
               dealing at "arms  length"  (as such term is defined in the Income
               Tax Act (Canada)) with the Corporation  except for usual employee
               reimbursements  and compensation  paid in the ordinary and normal
               course of the business of the Corporation;

         (ee)  the  Corporation   maintains  a  system  of  internal  accounting
               controls  sufficient  to provide  reasonable  assurance  that (i)
               transactions are executed in accordance with management's general
               or specific  authorizations,  (ii)  transactions  are recorded as
               necessary  to  permit  preparation  of  financial  statements  in
               conformity  with  generally  accepted  accounting  principles  in
               Canada and to  maintain  asset  accountability,  (iii)  access to
               assets is permitted only in accordance with management's  general
               or specific  authorization,  and (iv) the recorded accountability
               for assets is compared  with the  existing  assets at  reasonable
               intervals  and  appropriate  action is taken with  respect to any
               differences;

         (ff)  Olympia Trust Company at its principal office in Calgary, Alberta
               has been duly  appointed as the transfer  agent and registrar for
               the Common Shares;

         (gg)  the corporate  records and minute books of the Corporation  which
               have been made  available to the  Underwriters  and their counsel
               for  review  contain,  in all  material  respects,  complete  and
               accurate   minutes  of  all   meetings  of  the   directors   and
               shareholders of the  Corporation  held since  incorporation,  and
               signed  copies of all  resolutions  and  by-laws  duly  passed or
               confirmed by the  directors or  shareholders  of the  Corporation
               except  where the  absence of such  minutes  or signed  copies of
               resolutions  would not  result in a Material  Adverse  Effect and
               share certificate books, register of security holders,  registers
               of transfers and register of directors and any similar  corporate
               records  of  the  Corporation  are,  in  all  material  respects,
               complete and accurate; and

         (hh)  all of the material  contracts and agreements of the  Corporation
               (collectively,   "Contracts")   have   been   disclosed   to  the
               Underwriters.  Each such  Contract is a legal,  valid and binding
               obligation enforceable against the Corporation in accordance with
               its  terms  except  as  enforcement  thereof  may be  limited  by
               bankruptcy, insolvency, reorganization, moratorium and other laws
               relating to or affecting  the rights of creditors  generally  and
               except as limited by the application of equitable principles when
               equitable  remedies  are  sought,  and by the fact that rights to
               indemnity,  contribution  and  waiver,  and the  ability to sever
               unenforceable  terms,  may be limited by applicable  law; and the
               Corporation,  as applicable  is in  compliance  with the terms of
               such Contracts and the  Corporation is not a aware of any default
               or breach of a material nature under any of such Contracts by any
               other party thereto.

7.       Closing

7.1      The closing of the  purchase  and sale of the  Treasury  Shares and the
         Secondary  Shares shall be completed at the Closing Time on the Closing
         Date at the  offices  of the  Corporation's  counsel,  Osler,  Hoskin &
         Harcourt LLP, in Calgary, Alberta or at such other place as the Selling
         Shareholder,  the  Corporation  and the  Underwriters  may  agree to in
         writing.

                                       16


7.2      The  closing of the  purchase  and sale of any Option  Shares  shall be
         completed at the Closing Time on such date (the "Option Closing Date"),
         which  may be the same as the  Closing  Date  but  shall in no event be
         earlier than the Closing  Date,  nor less than three nor more than five
         business  days after the giving of the notice  hereinafter  referred to
         (provided  that if the Option  Closing  Date is the same as the Closing
         Date, such notice may be given not less than two business days prior to
         the Option  Closing  Date),  as shall be specified in a written  notice
         from  the Lead  Underwriter,  on  behalf  of the  Underwriters,  to the
         Selling   Shareholder   (with  a  copy  to  the   Corporation)  of  the
         Underwriters'  determination  to purchase  that number of Option Shares
         specified in such  notice.  The closing of the purchase and sale of any
         Option  Shares shall be  completed at the offices of the  Corporation's
         counsel,  Osler, Hoskin & Harcourt LLP, in Calgary,  Alberta or at such
         other  place  as the  Selling  Shareholder,  the  Corporation  and  the
         Underwriters may agree to in writing.  If the Over-Allotment  Option is
         exercised,  all of the  provisions  of this  Agreement  relating to the
         purchase by the  Underwriters  of the Treasury Shares and the Secondary
         Shares shall apply mutatis  mutandis in relation to the purchase by the
         Underwriters  of any Option  Shares at the  Closing  Time on the Option
         Closing Date.

7.3      At the Closing Time, the Corporation and the Selling  Shareholder shall
         deliver to the Underwriters a certificate or certificates  representing
         the  Treasury  Shares  and  Secondary  Shares  against  payment  of the
         purchase  price  on the  Closing  Date,  payable  separately,  by  wire
         transfer to the Corporation and to the Selling Shareholder,  or as they
         may  direct net of the  Underwriting  Fee  against  the  delivery  of a
         receipt thereof.

7.4      At the  Option  Closing  Time,  subject  to the  terms  and  conditions
         contained in this Agreement,  the Selling  Shareholder shall deliver to
         the Underwriters a certificate or certificates  representing the Option
         Shares and those  documents  reasonably  required  by the  Underwriters
         against  payment of the purchase  price payable by wire transfer on the
         Option  Closing Date, to the Selling  Shareholder  or as it may direct,
         net of the Underwriting Fee against the delivery of a receipt thereof.

7.5      Certificates  for Offered  Shares  shall be in such  denominations  and
         registered in such names as the  Underwriters may request in writing at
         least two (2)  business  days  before the  applicable  Closing  Time or
         Option Closing Time, as applicable.

8.       Closing Conditions

8.1      The obligations of the  Underwriters to purchase the Offered Shares are
         conditional  upon and  subject  to the  Underwriters  receiving  at the
         Closing Time:

         (a)   a certificate of the Selling  Shareholder dated the Closing Date,
               addressed to the  Underwriters  and signed by the Chief Executive
               Officer  of the  Selling  Shareholder  or such  other  officer or
               director   of  the   Selling   Shareholder   acceptable   to  the
               Underwriters, acting reasonably, certifying that:

               (i)   the  Selling  Shareholder  has  complied  in  all  material
                     respects  with all the  covenants  and has satisfied in all
                     material  respects  all the  terms and  conditions  of this
                     Agreement on its part to be complied  with and satisfied at
                     or prior to the  Closing  Time,  other than those which may
                     have been waived by the Underwriters;

               (ii)  no order,  ruling or  determination  having  the  effect of
                     ceasing the trading or suspending the sale of the Secondary
                     Shares  or  Option  Shares  has been  issued  by any  stock


                                       17


                     exchange,   securities   authority   or  other   regulatory
                     authority in Canada or the United  States and is continuing
                     in effect and no proceedings  for such have been instituted
                     and are  continuing  or are pending or, to the knowledge of
                     the Selling Shareholder, contemplated or threatened; and

               (iii) the   representations   and   warranties   of  the  Selling
                     Shareholder  contained  herein are true and  correct in all
                     material  respects  as of the Closing  Time,  with the same
                     force  and  effect as if made at such  time  before  giving
                     effect to the transactions contemplated hereby;

         (b)   a  certificate  of  the  Corporation   dated  the  Closing  Date,
               addressed to the  Underwriters  and signed by the Chief Executive
               Officer and the Chief  Financial  Officer of the  Corporation  or
               such other senior officers of the  Corporation  acceptable to the
               Underwriters, acting reasonably, certifying that:

               (i)   the Corporation has complied in all material  respects with
                     all the covenants  and  satisfied in all material  respects
                     all the terms and  conditions of this Agreement on its part
                     to be  complied  with  and  satisfied  at or  prior  to the
                     Closing  Time,  other than those which may have been waived
                     by the Underwriters;

               (ii)  no material change relating to the Corporation has occurred
                     between the date hereof and the Closing  Date with  respect
                     to which the requisite  material change report has not been
                     filed   and  no  such   disclosure   has  been  made  on  a
                     confidential basis that remains subject to confidentiality;

               (iii) the  representations  and  warranties  of  the  Corporation
                     contained  herein  are true  and  correct  in all  material
                     respects  as at the Closing  Time,  with the same force and
                     effect as if made at and as of the Closing Time; and

               (iv)  no order,  ruling or  determination  having  the  effect of
                     ceasing the trading or  suspending  the sale of the Offered
                     Shares or any other  securities of the Corporation has been
                     issued by any stock exchange, securities authority or other
                     regulatory  authority  and is  continuing  in effect and no
                     proceedings   for  such  have  been   instituted   and  are
                     continuing  or are  pending  or, to the  knowledge  of such
                     officers, contemplated or threatened;

         (c)   at the Closing Time, the Corporation  shall have furnished to the
               Underwriters  evidence  that the Offered  Shares have been listed
               for trading on the TSX;

         (d)   an  opinion of Cox Smith  Matthews  Incorporated,  United  States
               counsel to the Selling Shareholder, addressed to the Underwriters
               and  their  counsel  and  dated  the  Closing  Date,  in form and
               substance  satisfactory to the Underwriters,  acting  reasonably,
               with respect to such matters as the  Underwriters  may reasonably
               request, including that:

               (i)   the Selling  Shareholder is duly  incorporated  and validly
                     existing under the laws of the State of Nevada;

               (ii)  the  Selling   Shareholder  has  the  corporate  power  and
                     authority  to  execute  this  Agreement,   to  perform  its
                     obligations  hereunder and to consummate  the  transactions
                     contemplated herein;

                                       18


               (iii) all  necessary  corporate  action  has  been  taken  by the
                     Selling  Shareholder  to  authorize  the  execution of this
                     Agreement and the performance of its obligations hereunder;

               (iv)  this  Agreement has been duly executed for and on behalf of
                     the Selling Shareholder and constitutes a valid and legally
                     binding obligation of the Selling Shareholder;

               (v)   the execution by the Selling Shareholder of this Agreement,
                     the   performance   by  the  Selling   Shareholder  of  its
                     obligations   hereunder,   and  the   consummation  of  the
                     transactions  contemplated  herein do not conflict  with or
                     result in a violation of:

                     (A)  any  provision  of  the  articles  or  by-laws  of the
                          Selling Shareholder; or

                     (B)  to such counsel's knowledge any existing provision of,
                          or rule or  regulation  under,  Texas  state or United
                          States   federal  law,   applicable   to  the  Selling
                          Shareholder  (other than the U.S.  Securities  Laws or
                          any United States state  securities or "blue sky" laws
                          as to which such counsel need express no opinion), any
                          judgement,  order  or  decree  of  any  United  States
                          government,      governmental,      regulatory,     or
                          administrative   agency,   authority,   commission  or
                          instrumentality or court;

               (vi)  no   authorizations,    approvals,    consents,   licenses,
                     exemptions from or filings with any governmental,  judicial
                     or public  bodies or  authorities  in the United States are
                     required for the execution of this Agreement by the Selling
                     Shareholder and the performance by the Selling  Shareholder
                     of its obligations  hereunder  (except any  authorizations,
                     approvals,  consents, licenses,  exemptions from or filings
                     as may be  required  by the  U.S.  Securities  Laws  or any
                     United  States  state  securities  or "blue sky" laws as to
                     which such counsel need express no opinion);

               (vii) the choice of the laws of the  Province  of Alberta and the
                     federal laws of Canada to govern this  Agreement is a valid
                     choice  of law and such laws  other  than  conflict  of law
                     rules would  accordingly  be applied by Texas state and the
                     United  States  federal  courts  sitting  in  Texas if this
                     Agreement  and/or any claim  hereunder  comes  under  their
                     jurisdiction  upon proper proof of the relevant  provisions
                     of such laws;

               (viii)except as disclosed in the  Prospectus,  to such  counsel's
                     knowledge,  there are no  actions,  suits,  proceedings  or
                     inquiries  pending or  threatened  against or affecting the
                     Selling  Shareholder  at law or in equity  before or by any
                     United States governmental department,  commission,  board,
                     bureau,   agency  or   instrumentality   which  affect  the
                     distribution of the Secondary Shares and Options Shares, as
                     the case may be; and

               (ix)  no  filing  with,  or  authorization,   approval,  consent,
                     license, order,  registration,  qualification or decree of,
                     any U.S.  federal  court  sitting  in Texas or Texas  state
                     court or  governmental  authority  or agency of the  United
                     States is necessary or required for the  performance by the
                     Selling  Shareholder  of  its  obligations  hereunder,   in
                     connection  with  the  offering  or sale  of the  Secondary
                     Shares and Options Shares, as the case may be, hereunder or
                     the consummation of the  transactions  contemplated by this


                                       19


                     Agreement, except such as have been obtained or such as may
                     be required under U.S.  Securities Laws or state securities
                     or "blue sky" laws (as to which such  counsel  need express
                     no   opinion)  in   connection   with  the   purchase   and
                     distribution of the Secondary Shares and Options Shares, as
                     the case may be, by the Underwriters in the United States;

         (e)   an opinion of Osler,  Hoskin & Harcourt LLP,  Canadian counsel to
               the Corporation,  addressed to the Underwriters and their counsel
               and dated the Closing Date, in form and substance satisfactory to
               the Underwriters, acting reasonably, with respect to such matters
               as  the  Underwriters  may  reasonably  request  relating  to the
               distribution of the Offered Shares and the Corporation, including
               that:

               (i)   the Corporation is a corporation existing under the laws of
                     the Province of Alberta;

               (ii)  there  are no  restrictions  on  the  corporate  power  and
                     capacity  of  the  Corporation  to  carry  on  business  as
                     described in the Prospectus, to own property and assets and
                     to enter into and to  perform  its  obligations  under this
                     Agreement;

               (iii) the authorized  capital of the  Corporation  consists of an
                     unlimited  number  of  Common  Shares  of which  30,802,360
                     Common Shares are validly issued and  outstanding as of the
                     Closing Date;

               (iv)  all  necessary  corporate  action  has  been  taken  by the
                     Corporation  to validly  issue the  Treasury  Shares to the
                     Underwriters  and the  Treasury  Shares  have been  validly
                     issued and are outstanding as fully paid and non-assessable
                     shares;

               (v)   all  necessary  corporate  action  has  been  taken  by the
                     Corporation  to  authorize  the  execution,   delivery  and
                     performance  of this  Agreement and this Agreement has been
                     duly  executed  and  delivered  by  the   Corporation   and
                     constitutes  a legal,  valid and binding  obligation of the
                     Corporation   enforceable   against  the   Corporation   in
                     accordance with its terms;

               (vi)  the  attributes  of  the  Offered  Shares  conform  in  all
                     material respects with the description thereof contained in
                     the Prospectus;

               (vii) the Offered  Shares  sold at the  Closing  Time are validly
                     issued and  outstanding  as fully  paid and  non-assessable
                     shares of the Corporation;

               (viii)the  form of  share  certificate  representing  the  Common
                     Shares  complies  with  the  requirements  of the  Business
                     Corporations  Act  (Alberta)  and has been  approved by the
                     directors of the Corporation and the TSX;

               (ix)  no  filing  with,  or  authorization,   approval,  consent,
                     license, order,  registration,  qualification or decree of,
                     any  court  or  governmental  authority  or  agency  in any
                     Jurisdiction  is necessary or required for the  performance
                     by  the  Corporation  of  its  obligations  hereunder,   in
                     connection  with the offering or sale of the Offered Shares
                     hereunder   or  the   consummation   of  the   transactions
                     contemplated  by this  Agreement,  except such as have been
                     obtained;

               (x)   all documents have been filed,  all  proceedings  have been
                     taken and all legal requirements have been fulfilled by the
                     Corporation and the Selling Shareholder or under applicable


                                       20


                     laws of the Jurisdictions to qualify the Offered Shares for
                     sale  and  distribution  to  the  public  in  each  of  the
                     Jurisdictions   through   investment  dealers  and  brokers
                     registered  under  the  applicable  laws  of  each  of  the
                     Jurisdictions   who  have   complied   with  the   relevant
                     provisions of such applicable laws;

               (xi)  the execution,  delivery and  performance of this Agreement
                     by the Corporation and the sale and delivery at the Closing
                     Time of the Offered  Shares do not and will not result in a
                     material  breach  of,  and do not  create  a state of facts
                     which,  after notice or lapse of time or both,  will result
                     in a material breach or permit  acceleration or termination
                     (if  applicable)  of and do not  and  will  not  materially
                     conflict with or constitute a material default under:

                     (A)  any term or  provision  of the  articles,  by-laws  or
                          resolutions of the Corporation; or

                     (B)  any law, statute,  rule or regulation of Canada or the
                          Province of Alberta applicable to the Corporation,  or
                          to the knowledge of such counsel, any judgement, order
                          or decree of any government, governmental,  regulatory
                          or  administrative  agency,  authority,  commission or
                          instrumentality or court having jurisdiction over, the
                          Corporation; and

               (xii) the Offered  Shares are qualified  investments  for a trust
                     governed by registered retirement savings plans, registered
                     retirement income funds, registered education savings plans
                     and deferred profit sharing plans  (collectively,  "Plans")
                     under  the  Income  Tax Act  (Canada)  and the  regulations
                     thereunder, and are not "foreign property" for the purposes
                     of the tax  imposed  under  Part XI of the  Income  Tax Act
                     (Canada) on Plans (other than registered  education savings
                     plans) and certain other tax exempt entities;

         (f)   an opinion of Osler, Hoskin & Harcourt LLP, special United States
               counsel to the  Corporation,  addressed to the  Underwriters  and
               dated the Closing Date, in form and substance satisfactory to the
               Underwriters  acting  reasonably,  as to the sale of the  Offered
               Shares  under Rule 144A in the United  States or to U.S.  persons
               and such other matters as the Underwriters may reasonably request
               relating to the distribution of the Offered Shares;

         (g)   an  opinion  of  Macleod  Dixon  LLP,  Canadian  counsel  to  the
               Underwriters,  dated  the  Closing  Date,  in form and  substance
               satisfactory to the Underwriters, acting reasonably, with respect
               to  such  matters  as the  Underwriters  may  reasonably  request
               relating to the distribution of the Offered Shares;

         (h)   an  opinion  of  the  Corporation's   local  counsel  in  Quebec,
               addressed to the  Underwriters  and dated the Closing Date,  that
               the  Corporation  has  complied  with all laws of the Province of
               Quebec  relating to the use of the French  language in connection
               with the  documents to be delivered to  purchasers of the Offered
               Shares in the Province of Quebec;

         (i)   a comfort letter of the Corporation's auditors,  addressed to the
               Underwriters  and the directors of the  Corporation and dated the
               Closing  Date,  in  form  and  substance   satisfactory   to  the
               Underwriters,   acting   reasonably,   bringing  the  information
               contained  in the  comfort  letter or  letters  of such  auditors


                                       21


               referred to in section 3.2(b) hereof forward to the Closing Time,
               which comfort  letter shall be based on a review having a cut-off
               date not more than two business days prior to the Closing Date;

         (j)   evidence  from the Selling  Shareholder  as to the  consent  from
               Guggenheim  Corporate  Funding,  LLC,  as  administrative  agent,
               and/or the lenders who are parties to the Loan  Agreement  of the
               sale by the Selling  Shareholder of the Secondary  Shares and the
               Option Shares to the Underwriters;

         (k)   evidence from the  Corporation  as to the  appointment of Olympia
               Trust Company as the registrar and transfer agent for the Offered
               Shares;

         (l)   written   confirmation  from  the  Corporation's   registrar  and
               transfer  agent  of  the  number  of  Common  Shares  issued  and
               outstanding as of the Closing Date; and

         (m)   such  further   certificates,   opinions  of  counsel  and  other
               documentation from the Corporation and/or the Selling Shareholder
               as the Underwriters may reasonably require, provided however that
               the  Underwriters  shall  request  such  certificate  or document
               within a  reasonable  period  prior to the  Closing  Time that is
               sufficient for the Corporation and/or the Selling  Shareholder to
               obtain and deliver such certificate or document.

         It is  understood  that  counsel for the  Underwriters  may rely on the
         opinions  of counsel for the Selling  Shareholder  as to matters  which
         relate  specifically to the Selling  Shareholder and on the opinions of
         counsel for the Corporation as to matters which relate  specifically to
         the Corporation, and that counsel for the Selling Shareholder,  counsel
         for the Corporation and counsel for the  Underwriters may rely upon the
         opinions of local counsel as to all matters not governed by the laws of
         the  respective  jurisdictions  in which they are qualified to practice
         and may rely, to the extent  appropriate  in the  circumstances,  as to
         matters of fact on certificates of officers of the Selling  Shareholder
         and the Corporation, the Corporation's registrar and transfer agent and
         of the TSX or public officials.

8.2      The Underwriters' obligations under this Agreement are conditional upon
         and  subject  to the  representations  and  warranties  of the  Selling
         Shareholder and the Corporation contained herein being true and correct
         in all material  respects as at the Closing  Time,  with the same force
         and effect as if made at the Closing Time before  giving  effect to the
         transactions  contemplated  hereby, and the Selling Shareholder and the
         Corporation  having  complied  in all  material  respects  with all the
         covenants and having  satisfied in all material  respects all the terms
         and conditions of this Agreement on its respective  part to be complied
         with and  satisfied at or prior to the Closing  Time,  other than those
         which may have been waived by the Underwriters.

9.       Restriction on Further Issues or Sales

9.1      During the period  commencing  on the date hereof and ending on the day
         which is 180 days following the Closing Date, the Corporation or any of
         its  subsidiaries  shall not without the prior  written  consent of the
         Underwriters (which consent shall not be unreasonably withheld):

         (a)   issue any Common Shares or any  securities of the  Corporation or
               any  securities   convertible   into  or  exchangeable   for  any
               securities of the Corporation,  other than Common Shares pursuant
               to this  Agreement  or any employee  benefit,  incentive or stock
               option plans of the  Corporation  in existence at the date hereof
               including the stock option  compensation plan as disclosed in the
               Prospectus;

                                       22


         (b)   agree or become bound to do so; or

         (c)   publicly announce any intention to do so.

9.2      During the period  commencing  on the date hereof and ending on the day
         which is 180 days following the Closing Date,  the Selling  Shareholder
         shall not without the prior written consent of the Underwriters  (which
         consent shall not be unreasonably withheld):

         (a)   sell,  offer,  contract  to sell,  pledge,  grant  any  option to
               purchase,  make any short sale or  dispose  of any Common  Shares
               owned or controlled by it, or any securities  convertible into or
               exchangeable for such Common Shares,  other than pursuant to this
               Agreement;

         (b)   agree or become bound to do so; or

         (c)   publicly announce any intention to do so.

9.3      The Underwriters acknowledge the Secondary Shares and the Option Shares
         have been pledged by the Selling  Shareholder  as security in favour of
         Guggenheim  Corporate  Funding,  LLC, as agent for certain arm's length
         third party  lenders,  pursuant to the Pledge  Agreement  and that such
         security  obligation  shall  continue  until the  Closing  Time and the
         Option   Closing  Time,   respectively,   at  which  time  the  Selling
         Shareholder is obligated pursuant to the terms of the Loan Agreement to
         pay such amount of the net  proceeds  it receives  from the sale of the
         Secondary Shares and the Option Shares to Guggenheim Corporate Funding,
         LLC, as agent,  as required to fully repay its  outstanding  debt under
         the Loan Agreement.

10.      Indemnity

10.1     Each  of the  Corporation  and the  Selling  Shareholder,  jointly  and
         severally,  covenants and agrees to protect and  indemnify  each of the
         Underwriters  (which term, for the purpose of this section 10, shall be
         deemed to include  affiliates of the Underwriters  which are engaged in
         the offering and distribution of the Offered Shares),  their respective
         directors, officers, employees and agents, and each person who controls
         any  Underwriter  against  all losses  (other than a loss of profits or
         other  consequential  or punitive  damages),  claims,  actual  damages,
         liabilities, reasonable costs or reasonable expenses caused or incurred
         by reason of:

         (a)   any   information  or  statement  in  the   Prospectuses  or  any
               Prospectus  Amendment  (except  any  information  and  statements
               relating  solely to the  Underwriters  which has been provided by
               the   Underwriters)    being   or   being   alleged   to   be   a
               misrepresentation  (as such term is defined in the Securities Act
               (Alberta) or any misstatement of a material fact;

         (b)   the omission or alleged  omission to state in the Prospectuses or
               any  certificate  of  the  Corporation   delivered  hereunder  or
               pursuant  hereto,  any material  fact (other than a material fact
               relating  solely to the  Underwriters  which has been provided by
               the  Underwriters)  required to be stated therein or necessary to
               make any statement not misleading;

         (c)   any order made or inquiry, investigation or proceeding (formal or
               informal)  commenced or  threatened by any officer or official of
               any  of  the  Securities  Commissions  or  any  other  regulatory
               authority based upon the  circumstances  described in clauses (a)
               above  which  operates  to  prevent  or  restrict  trading  in or
               distribution of the Offered Shares in any of the Jurisdictions;

                                       23


         (d)   the breach of any representations, warranties or covenants of the
               Corporation contained herein or delivered pursuant hereto; or

         (e)   the  non-compliance or alleged  non-compliance by the Corporation
               and the Selling  Shareholder  with any  requirement of applicable
               Canadian  Securities  Laws in  connection  with the  transactions
               contemplated    herein,     including,     without    limitation,
               non-compliance  with  any  statutory   requirement  to  make  any
               document available for inspection.

10.2     If any matter or thing  contemplated  by section 10.1 shall be asserted
         against any person or company  referred to in those sections in respect
         of which  indemnification  is or might  reasonably  be considered to be
         provided or if any potential  claim  contemplated by section 10.1 shall
         come to the  knowledge  of any such person or  company,  such person or
         company (the  "Indemnified  Party") shall notify the party against whom
         such  indemnity  may be sought  (the  "Indemnifying  Party") as soon as
         possible of the nature of such claim and the  Indemnifying  Party shall
         be  entitled  (but not  required)  to assume  the  defense  of any suit
         brought to enforce  such  claim;  provided,  however,  that the defense
         shall be through legal counsel  acceptable  to the  Indemnified  Party,
         acting reasonably, and that no admission of liability and no settlement
         may be made by the Indemnifying  Party or the Indemnified Party without
         the  prior  written  consent  of  the  other,  such  consent  not to be
         unreasonably withheld. The reasonable fees and disbursements of counsel
         retained to assume the defense of any such suit in accordance  with the
         foregoing shall be paid by the Indemnifying Party.

10.3     With respect to any such claim,  the  Indemnified  Party shall have the
         right to retain additional counsel to act on his or its behalf provided
         the fees and disbursements of such additional  counsel shall be paid by
         the Indemnified Party, unless:

         (a)   the  Indemnifying  Party and the  Indemnified  Party  shall  have
               mutually agreed to the retention of the additional counsel; or

         (b)   the named  parties to any claim  (including  any added,  third or
               impleaded  parties) include both the  Indemnifying  Party and the
               Indemnified  Party and the Indemnified  Party has been advised in
               writing by his or its counsel that representation of both parties
               by the same counsel would be  inappropriate  due to the actual or
               potential differing interests between them;

         provided that in no event shall the  Indemnifying  Party be required to
         pay the fees and  disbursements of more than one set of counsel for all
         the Indemnified Parties.

10.4     The rights of indemnity contained in this section 10 shall not enure to
         the benefit of any  Indemnified  Party if the  Corporation has complied
         with the  provisions  of  sections  3.3 and 5.2  hereof  and the person
         asserting  any claim with  respect to which  indemnity  is sought under
         this  section  10  was  not  provided  with a  copy  of the  Prospectus
         Amendment,  as applicable,  at or prior to the written  confirmation of
         the sale of the Offered  Shares and which  Prospectus  Amendment  would
         have corrected any untrue  statement or information,  misrepresentation
         or  omission  which is the basis of such  claim and which is  required,
         under the Canadian  Securities  Laws, to be delivered to such person by
         the Underwriters or other Selling Firms.

10.5     The Corporation  hereby waives its rights to recover  contribution from
         any Indemnified  Party with respect to any liability of the Corporation
         by reason of or arising  out of any untrue  statement  or  information,
         misrepresentation  or omission  contained in the Prospectuses or in any


                                       24


         Supplementary Material;  provided,  however, that such waiver shall not
         apply in  respect  of  liability  caused  or  incurred  by reason of or
         arising out of:

         (a)   any  untrue  statement  or  information,   misrepresentation   or
               omission  which is based  upon or  results  from  information  or
               statements relating solely to the Underwriters; or

         (b)   any failure by the Underwriters or other Selling Firms to provide
               to  prospective  purchasers  of the Offered  Shares any  document
               which is required to be provided to such  prospective  purchasers
               and which, in the case of the  Prospectuses,  the Corporation has
               provided  to the  Underwriters  to  forward  to such  prospective
               purchasers.

10.6     The rights  provided for in this section 10 shall be in addition to and
         not in derogation of any other right which the Underwriters may have by
         statute or otherwise at law.

11.      Contribution

11.1     If for any  reason an  indemnification  provided  for in  section 10 is
         unavailable,  in whole or in part, to the Indemnified  Party in respect
         of any losses, claims, actual damages,  liabilities,  costs or expenses
         referred  to in  section  10,  and  subject  to  the  restrictions  and
         limitations   referred  to  therein,   the  Indemnifying   Party  shall
         contribute  to the amount  paid or payable  (or, if such  indemnity  is
         unavailable  only in  respect  of a  portion  of the  amount so paid or
         payable,  such  portion  of the  amount  so  paid or  payable)  by such
         Indemnified  Party  as a  result  of such  losses  (except  for loss of
         profits or other  consequential and punitive damages arising),  claims,
         actual damages, liabilities, reasonable costs or reasonable expenses:

         (a)   in such  proportion  as is  appropriate  to reflect the  relative
               benefits  received by the Indemnifying  Party on the one hand and
               the Indemnified  Party on the other hand from the distribution of
               the Offered Shares; or

         (b)   if the  allocation  provided  by  section  11.1 (a)  above is not
               permitted by applicable law or if it is otherwise not applicable,
               in such  proportion  as is  appropriate  to reflect  not only the
               relative  benefits referred to in section 11.1 (a) above but also
               the relative fault of the Indemnifying  Party on the one hand and
               the  Indemnified  Party on the other hand in connection  with the
               statement,  information,   misrepresentation,   omission,  order,
               inquiry,  investigation,  proceeding  or  other  matter  or thing
               referred to in section 10 which resulted in such losses,  claims,
               actual damages,  liabilities,  costs or expenses,  as well as any
               other relevant equitable considerations.

11.2     For purposes of this section 11, the relative  benefits received by the
         Selling  Shareholder  or  the  Corporation  on the  one  hand  and  the
         Underwriters  on the  other  hand  shall  be  deemed  to be in the same
         proportion as the total proceeds from the  distribution  of the Offered
         Shares (net of the fee payable to the Underwriters but before deducting
         expenses) received by the Corporation and the Selling Shareholder bears
         to the  Underwriting Fee received by the  Underwriters.  In the case of
         liability arising out of Prospectuses and any  Supplementary  Material,
         the relative fault of the Corporation or the Selling Shareholder on the
         one hand and the  Underwriters on the other hand shall be determined by
         reference to, among other things,  whether the statement,  information,
         misrepresentation,  omission, order, inquiry, investigation, proceeding
         or other  matter or thing  referred to in section 10 which  resulted in
         such losses,  claims,  actual damages,  liabilities,  costs or expenses
         relates to information supplied by or steps or actions taken or done by
         or on  behalf  of the  Corporation,  the  Selling  Shareholder  and the
         Underwriters  and the parties'  relative intent,  knowledge,  access to
         information  and  opportunity  to correct or  prevent  such  statement,
         information,     misrepresentation,     omission,    order,    inquiry,


                                       25


         investigation,  proceeding  or other  matter  or thing  referred  to in
         section  10. The amount  paid or payable by an  Indemnified  Party as a
         result of such losses,  claims, actual damages,  liabilities,  costs or
         expenses  referred  to above  shall be deemed to  include  any legal or
         other  expenses  reasonably  incurred  by  such  Indemnified  Party  in
         connection  with  investigating  or defending any such losses,  claims,
         actual  damages,  liabilities,   costs  or  expenses,  whether  or  not
         resulting in any such action, suit, proceeding or claim.

11.3     Any  liability  of the  Underwriters  under  this  section  11 shall be
         limited to the amount of the Underwriting Fee actually  received by the
         Underwriters.  The right to  contribution  provided  herein shall be in
         addition and not in derogation of any other right to contribution which
         the Underwriters may have by statute or otherwise by law.

12.      Expenses

12.1     Whether or not the transactions herein contemplated shall be completed,
         the Corporation and the Selling  Shareholder  shall pay all expenses of
         or incidental to the delivery and sale of the Offered  Shares and of or
         incidental  to all other matters in  connection  with the  transactions
         herein  set out,  including,  without  limitation,  (i) the cost of any
         institutional and retail roadshows, (ii) expenses payable in connection
         with the  qualification  of the Offered  Shares for sale to the public,
         (iii)  the  reasonable  fees and  expenses  of the  Corporation's,  the
         Selling   Shareholder's  and  the  Underwriters'   counsel,   (iv)  all
         advertising  expenses,  (v) all costs  incurred in connection  with the
         preparation, translation, printing and delivery of the Prospectuses and
         any Supplementary  Material,  including  commercial copies thereof, and
         (vi) the  expenses of forming and managing  banking and selling  groups
         and the  Underwriters'  "out-of-pocket"  expenses,  including,  but not
         limited  to, all fees,  taxes,  disbursements,  advertising,  printing,
         courier,  telecommunications,  data search,  travel and other  expenses
         incurred by the  Underwriters  and their  counsel and agents,  together
         with  related  goods  and  services  tax  and  provincial  sales  taxes
         (collectively  (i) through  (vi)  referred to as the  "Expenses").  The
         Expenses shall be paid by the Corporation  and the Selling  Shareholder
         in the same proportion as the total proceeds from the Offering received
         by each of them bears to such total offering proceeds.

13.      Conditions

13.1     All  terms and  conditions  of this  Agreement  shall be  construed  as
         conditions,  and any  breach  or  failure  to  comply  in all  material
         respects  with any such terms and  conditions  required  to be complied
         with by the  Corporation or the Selling  Shareholder  shall entitle the
         Underwriters,   without   limitation  of  any  other  remedies  of  the
         Underwriters,  to terminate  their  obligations to purchase the Offered
         Shares  by  notice  to that  effect  given to the  Corporation  and the
         Selling  Shareholder  at or prior to the Closing Time. It is understood
         that the  Underwriters  may waive,  in whole or in part,  or extend the
         time for  compliance  with,  any of such terms and  conditions  without
         prejudice to the rights of the  Underwriters in respect of any other of
         such  terms  and  conditions  or any  other  or  subsequent  breach  or
         non-compliance,  provided  that to be binding on the  Underwriters  any
         such waiver or extension must be in writing.

14.      Termination

14.1     Each  Underwriter  shall be entitled,  at its option,  to terminate and
         cancel, without any liability on the Underwriter's part, its obligation
         to purchase the Offered Shares, if prior to the Closing Time:

         (a)   there should develop,  occur or come into effect or existence any
               catastrophe,  crisis or accident  of  national  or  international
               consequence,  any law or regulation  or any other event,  action,


                                       26


               state,  condition or major  financial  occurrence  of national or
               international   consequence   which,   in  the   opinion  of  the
               Underwriter, acting reasonably,  materially and adversely affects
               or may materially and adversely  affect the financial  markets or
               the  business,  operations or affairs of the  Corporation  and/or
               prevents or materially restricts the trading in the Common Shares
               or  the  distribution  of  Offered  Shares  or the  state  of the
               Canadian or United States financial  markets is such that, in the
               sole opinion of the Underwriters,  acting reasonably, the Offered
               Shares cannot be profitably  marketed,  by giving the Corporation
               and the  Selling  Shareholder  written  notice to that effect not
               later than the Closing Time;

         (b)   any order or ruling is  issued,  any  inquiry,  investigation  or
               other proceeding  (whether formal or informal) in relation to the
               Selling  Shareholder or the  Corporation  is made,  threatened or
               announced  by any  officer  or  official  of any stock  exchange,
               Securities Commission or other regulatory  authority,  or any law
               or regulation is promulgated or changed which,  in the opinion of
               the  Underwriter,  acting  reasonably,  operates  to  prevent  or
               restrict  trading  in or  distribution  or  marketability  of the
               Offered  Shares,  by  giving  the  Corporation  and  the  Selling
               Shareholder  written  notice to that  effect  not later  than the
               Closing Time; or

         (c)   there shall occur any change or event such as is  contemplated by
               section  5.1 hereof  which,  in the  opinion of the  Underwriter,
               acting  reasonably,  materially  and  adversely  affects  or  may
               materially  and  adversely  affect  the  market  price,  value or
               marketability  of the Offered  Shares,  by giving the Corporation
               and the  Selling  Shareholder  written  notice to that effect not
               later than the Closing Time.

14.2     If the  obligations  of any  Underwriter  are  terminated  pursuant  to
         section 14.1,  there shall be no further  liability on the part of such
         Underwriter  or of the  Corporation  or the Selling  Shareholder to the
         Underwriter  except in respect of any liability,  which may have arisen
         or may thereafter arise under section 10, 11 or 12.

14.3     The right of the Underwriters to terminate their respective obligations
         under this  Agreement is in addition to such other remedies as they may
         have  in  respect  of  any  default,  act  or  failure  to  act  of the
         Corporation or the Selling Shareholder in respect of any of the matters
         contemplated by this Agreement.

15.      Survival

15.1     All  warranties,  representations,  covenants  and  agreements  of  the
         Selling  Shareholder,  the  Corporation  and  the  Underwriters  herein
         contained  or  contained  in  documents   submitted  pursuant  to  this
         Agreement shall survive the purchase and sale of the Offered Shares and
         the  termination of this Agreement and shall continue in full force and
         effect for the benefit of the Underwriters,  the Selling Shareholder or
         the  Corporation,  as the case  may be,  regardless  of any  subsequent
         disposition of such shares or any  investigation by or on behalf of the
         Underwriters with respect thereto.

16.      Stabilization

16.1     In  connection  with  the  distribution  of  the  Offered  Shares,  the
         Underwriters   and  other  Selling  Firms  may   over-allot  or  effect
         transactions,  in compliance with applicable  Canadian Securities Laws,
         which  stabilize or maintain  the market price of the Common  Shares at


                                       27


         levels  above those which might  otherwise  prevail in the open market.
         Such stabilizing transactions, if any, may be discontinued at any time.

17.      Participation

17.1     Subject  to the terms and  conditions  hereof,  the  obligation  of the
         Underwriters  to purchase  the Offered  Shares shall be several and not
         joint. The percentage of the Treasury Shares,  the Secondary Shares and
         if the  Over-Allotment  Option is exercised,  the Option Shares,  to be
         separately  purchased  and  paid  for by the  Underwriters  shall be as
         follows:

                  CIBC World Markets Inc.                       50%
                  BMO Nesbitt Burns Inc.                        20%
                  GMP Securities Ltd.                           20%
                  Canaccord Capital Corporation                 10%
                                                         ----------
                                                               100%

         If at the Closing  Time any of the  Underwriters  fails to purchase its
         applicable  percentage of the Treasury Shares and the Secondary Shares,
         the  other  Underwriters  shall  have  the  right,  but  shall  not  be
         obligated,  to purchase  all,  but not less than all,  of the  Treasury
         Shares  and the  Secondary  Shares  which  would  otherwise  have  been
         purchased by the  Underwriters  which fails to  purchase.  In the event
         that such right is not  exercised,  each of the  Underwriters  which is
         able and willing to purchase  shall be relieved of all  obligations  to
         the  Corporation  and the  Selling  Shareholder  on  submission  to the
         Corporation and the Selling  Shareholder of reasonable  evidence of its
         ability and  willingness  to fulfil its  obligations  hereunder  at the
         Closing Time.  Nothing in this section shall oblige the Corporation and
         the Selling  Shareholder to sell to any or all of the Underwriters less
         than all of the  Treasury  Shares  and the  Secondary  Shares  or shall
         relieve any of the Underwriters in default  hereunder from liability to
         the  Corporation  and the Selling  Shareholder.  The provisions of this
         section 17.1 shall apply mutatis mutandis to the purchase of any Option
         Shares  in  respect  of  which  the  Over-Allotment   Option  has  been
         exercised.

18.      U.S. Offers

18.1     The Underwriters, severally, but not jointly, make the representations,
         warranties and covenants applicable to them in Schedule "A" hereto and,
         severally,  but not jointly,  agree,  on behalf of themselves and their
         United States  affiliates,  for the benefit of the  Corporation and the
         Selling  Shareholders,  to comply  with the U.S.  selling  restrictions
         imposed by the laws of the United  States as set forth in Schedule  "A"
         hereto,  which forms part of this Agreement.  They also agree to obtain
         such an  agreement  from each  member of the Selling  Dealer  Group (as
         defined  in  Schedule  "A"  attached).  Notwithstanding  the  foregoing
         provisions of this paragraph,  an Underwriter will not be liable to the
         Corporation or the Selling Shareholder under this paragraph or Schedule
         "A; with  respect to a violation by another  Underwriter  or by another
         members of the Selling Dealer Group of the provisions of this paragraph
         or  Schedule  "A" if the  former  Underwriter  is not  itself  also  in
         violation.

18.2     The  Corporation  represents,  warrants  and  agrees  to and  with  the
         Underwriters  and  the  Selling  Shareholders  that  (i)  none  of  the
         Corporation,  its  affiliates  or any  person  acting  on its or  their
         behalf,  (A) has engaged or will engage in any Directed Selling Efforts
         (as such term is defined in  Regulation  S  promulgated  under the U.S.
         Securities Act, hereinafter "Regulation S") or any general solicitation
         or general  advertising (within the meaning of Regulation D promulgated
         under the U.S Securities Act) with respect to the Offered Shares in the
         United  States,  (B) has  made or will  make  any  offer or sale of any
         Offered Shares in the United States except through the  Underwriters in


                                       28


         accordance  with this  Agreement  and Schedule  "A" hereto,  or (C) has
         offered or sold or will offer or sell any  securities  in a manner,  or
         have  taken  or will  take any  other  action,  that  would  cause  the
         exemptions from  registration  provided by Rule 144A or Regulation S to
         become  unavailable  for offers and sales of the Offered Shares or that
         would  constitute a violation of  Regulation M under the U.S.  Exchange
         Act; (ii) it is, and  immediately  prior to any sale of Offered  Shares
         pursuant  to this  Agreement  will be, a  "foreign  issuer"  within the
         meaning  of  Regulation  S that  reasonably  believes  that there is no
         "substantial  U.S.  market  interest"  (as such terms is defined  under
         Regulation S) in the Common  Shares;  (iii) it is not, and  immediately
         prior to any sale of Offered Shares pursuant to this Agreement will not
         be,  an  open-ended   investment  company,  unit  investment  trust  or
         face-amount certificate company that is or is required to be registered
         under section 8 of the U.S. Investment Company Act of 1940, as amended;
         (iv) the Offered Shares are not, and  immediately  prior to any sale of
         offered  Shares  pursuant to this  Agreement  will not be (A) part of a
         class listed on a national securities exchange registered under section
         6 of the  U.S.  Exchange  Act,  (B)  part of a class  quoted  in a U.S.
         automated  inter-dealer  quotation  system  within the  meaning of Rule
         144A, or (C)  convertible or  exchangeable  at an effective  conversion
         premium or  effective  exercise  premium  (calculated  as  specified in
         paragraphs  (a)(6)  and  (a)(7)  of Rule  144A)  of less  than  10% for
         securities  so  listed  or  quoted;  and  (v) for so long as any of the
         Offered Shares are outstanding and are "restricted  securities"  within
         the  meaning of Rule  144(a)(3)  of the U.S.  Securities  Act, it shall
         either:  (A)  furnish  to the United  States  Securities  and  Exchange
         Commission  (the "SEC") all  information  required to be  furnished  in
         accordance  with Rule 12g3-2(b)  under the U.S.  Exchange Act; (B) file
         reports and other information with the SEC under section 13 or 15(d) of
         the  U.S.  Exchange  Act;  or (C) if it is not  exempt  from  reporting
         pursuant  to Rule  12g3-2(b)  nor subject to section 13 or 15(d) of the
         U.S. Exchange Act, then furnish to any holder of Offered Shares and any
         prospective purchaser of Offered Shares designated by such holder, upon
         the request of such holder,  the  information  required to be delivered
         pursuant to Rule 144(d)(4) under the U.S. Securities Act.

18.3     The Selling Shareholder represents, warrants and agrees to and with the
         Underwriters  and the  Corporation  that the Selling  Shareholder,  its
         affiliates or any person  acting on their behalf,  has not: (i) engaged
         or will not  engage in any  Directed  Selling  Efforts  or any  general
         solicitation  or general  advertising in the United States with respect
         to the Offered Shares or any other securities of the Corporation;  (ii)
         made nor will make any offer or sale of any Offered Shares or any other
         securities of the  Corporation  in the United States except through the
         Underwriters in accordance with this Agreement and Schedule "A" hereto;
         and (iii)  offered  or sold or will offer or sell any  securities  in a
         manner,  or has taken or will take any other  action,  that would cause
         the exemptions from registration  provided by Rule 144A or Regulation S
         to become  unavailable  for offers and sales of the  Offered  Shares or
         that  would  constitute  a  violation  of  Regulation  M under the U.S.
         Exchange Act.

19.      Lead Underwriter

19.1     The  Corporation  shall be  entitled  to and shall  act on any  notice,
         waiver,  extension  or  communication  given  by or on  behalf  of  the
         Underwriters  by  the  Lead  Underwriter,  which  shall  represent  the
         Underwriters  and which have the authority to bind the  Underwriters in
         respect of all  matters  hereunder,  except in respect of any notice of
         termination  given pursuant to section 14, which notice may be given by
         any Underwriter, and any settlement under section 10 or 11.

                                       29


20.      Notices

20.1     Any  notice  or  other  communication  to be given  hereunder  shall be
         addressed as follows:

         if to the Selling Shareholder:

                  Abraxas Petroleum Corporation
                  500 N. Loop 1604 East, Suite 100
                  San Antonio, Texas 78232
                  USA

                  P.O. Box 701007 San Antonio, Texas 78270-1007
                  USA

                  Facsimile:        210-490-8816
                  Attention:        Robert L.G. Watson, President

         with copies to:

                  Cox Smith Matthews Incorporated
                  112 E. Pecan Street, Suite 1800
                  San Antonio, Texas  78205-1521
                  USA

                  Facsimile:        (210) 226-8395
                  Attention:        Steven R. Jacobs

         if to the Corporation:

                  Grey Wolf Exploration Inc.
                  Suite 1500, Sun Life Plaza
                  144 - 4th Avenue S.W.
                  Calgary, Alberta  T2P 3N4

                  Facsimile:        403-262-1949
                  Attention:        Robert L.G. Watson, Chief Executive Officer

         with copies to:

                  Osler, Hoskin & Harcourt LLP
                  1900, 333 - 7th Avenue S.W.
                  Calgary Alberta  T2P 2Z1

                  Facsimile:        403-260-7024
                  Attention:        Mark R. Smith

                                       30


         if to the Underwriters, each of:

                  CIBC World Markets Inc.
                  9th Floor, Bankers Hall East
                  855 - 2nd Street S.W.
                  Calgary, Alberta  T2P 4J7

                  Facsimile:        403-260-0524
                  Attention:        Brenda A. Mason, Managing Director

                  with a copy to:  Robert J. Richardson
                                    Vice President Legal, CIBC World Markets
                  Facsimile:        416-304-4573

                  BMO Nesbitt Burns Inc.
                  2200, 333 - 7th Avenue S.W.
                  Calgary, Alberta  T2P 2Z1

                  Facsimile:        403-515-1525
                  Attention:        Shane C. Fildes, Executive Managing Director

                  GMP Securities Ltd.
                  1600, 500 - 4th Avenue S.W.
                  Calgary, Alberta  T2P 2V6

                  Facsimile:        403-543-3589

                  Attention:        Matt Sobolewski, Vice President,  Investment
                                    Banking

                  Canaccord Capital Corporation
                  Suite 400, 409 - 8th Avenue S.W.
                  Calgary, Alberta  T2P 1E3

                  Facsimile:        403-508-3866
                  Attention:        Richard A. Grafton, President

         with copies to:

                  Macleod Dixon LLP
                  3700, 400 - 3rd Avenue S.W.
                  Calgary, Alberta  T2P 4H2

                  Facsimile:        403-264-5973
                  Attention:        Kevin E. Johnson

Any such notice or other communication shall be in writing, and unless delivered
personally to a responsible officer of the addressee,  shall be given by courier
service  or  telecopy,  and shall be deemed to have been  received,  if given by
telecopy,  on the day of sending (or the next business day following the sending
if the sending is after 4:00 p.m. (Calgary time) or if the day of sending is not
a business  day) and,  if given by courier  service,  on the next  business  day
following the sending thereof.

                                       31


21.      Agent for Service

By the execution and delivery of this  Agreement,  the Selling  Shareholder  (i)
acknowledges that it has, by separate written instrument, irrevocably designated
and appointed Osler, Hoskin & Harcourt LLP (or any successor) (together with any
successor,  the  "Agent  for  Service"),  as their  authorized  agent upon which
process  may be served in any suit or  proceeding  arising out of or relating to
this  Agreement or the Offered  Shares,  that may be  instituted in any court in
Canada, or brought under the Canadian Securities Laws, and acknowledges that the
Agent for Service has accepted such designation, and (ii) agrees that service of
process upon the Agent for Service (or any successor) and written notice of said
service to the Selling  Shareholder  shall be deemed in every respect  effective
service of process upon the Selling  Shareholder in any such suit or proceeding.
The Selling Shareholder further agrees to take any and all action, including the
execution and filing of any and all such  documents and  instruments,  as may be
necessary to continue such  designation and appointment of the Agent for Service
in full  force  and  effect  so  long  as any of the  Offered  Shares  shall  be
outstanding.

22.      Miscellaneous

22.1     The  Corporation  hereby  consents to the sale of the Offered Shares by
         the Selling Shareholder pursuant to this Agreement.

22.2     If any  provision  of  this  Agreement  is  determined  to be  void  or
         unenforceable  in whole or in part, it shall be deemed not to affect or
         impair the validity of any other  provision of this  Agreement and such
         void or unenforceable provision shall be severed from this Agreement.

22.3     This Agreement  shall be governed by and interpreted in accordance with
         the laws of the  Province  of Alberta  and the  federal  laws of Canada
         applicable therein. Each of the Corporation and the Selling Shareholder
         irrevocably attorns to the non-exclusive  jurisdiction of the courts of
         the Province of Alberta with respect to all matters arising out of this
         Agreement and the transactions contemplated herein.

22.4     Time shall be of the essence hereof.

22.5     This  Agreement  may be  executed  in any  number  of  counterparts  or
         facsimiles,  each of which  when so  executed  shall be deemed to be an
         original and all of which when taken together shall  constitute one and
         the same agreement.

22.6     All dollar amounts referred to in this Agreement are in Canadian funds,
         unless otherwise specified.

22.7     It is  understood  that this  agreement  shall  supersede  any  written
         agreement  between the  Corporation,  the Selling  Shareholder  and the
         Underwriters in respect of the distribution of the Offered Shares.

                                       32


If the foregoing is in accordance with your understanding and is agreed to by
you, please communicate your acceptance by executing this letter where indicated
below and returning same to the Underwriters.

Yours very truly,

CIBC WORLD MARKETS INC.                  BMO NESBITT BURNS INC.


By:                                      By:
     ---------------------------            -------------------------------
     Brenda A. Mason                        Shane C. Fildes
     Managing Director                      Executive Managing Director

GMP SECURITIES LTD.                         CANACCORD CAPITAL CORPORATION


By:                                       By:
   -------------------------------            -----------------------------
     Matt Sobolewski                          Richard A. Grafton
     Vice President, Investment Banking       President


The foregoing is hereby accepted by us.

DATED this ____ day of ______________, 2005

GREY WOLF EXPLORATION INC.

By:_______________________________
     Robert L.G. Watson
     Chief Executive Officer


ABRAXAS PETROLEUM CORPORATION



By:________________________________
     Robert L.G. Watson
     President



                                       33

                                  SCHEDULE "A"
                            U.S. SELLING RESTRICTIONS

         Capitalized  terms used but not defined in this Schedule "A" shall have
         the  meaning  ascribed  thereto  in  the  underwriting  agreement  (the
         "Underwriting Agreement") to which this Schedule "A" is attached.

1.       For the purpose of this Schedule  "A", the  following  terms shall have
         the meanings indicated:

         (a)   "Final U.S. Private  Placement  Memorandum"  means the final U.S.
               private placement memorandum to which a copy of the Prospectus is
               attached;

         (b)   "Foreign  Issuer" means a foreign  issuer as that term is defined
               in Regulation S. Without limiting the foregoing,  but for greater
               clarity in this Schedule "A", it means any issuer that is (a) the
               government of any country,  or of any political  subdivision of a
               country,  other than the United  States;  or (b) a corporation or
               other  organization  incorporated  under the laws of any  country
               other  than the  United  States,  except  an issuer  meeting  the
               following conditions: (I) more than 50 percent of the outstanding
               voting securities of such issuer are directly or indirectly owned
               of record by residents of the United  States;  and (2) any of the
               following:   (i)  the  majority  of  the  executive  officers  or
               directors are United States citizens or residents, (ii) more than
               50 percent of the assets of the issuer are  located in the United
               States,  or (iii) the  business  of the  issuer  is  administered
               principally in the United States;

         (c)   "Preliminary  U.S.  Private   Placement   Memorandum"  means  the
               preliminary U.S. private placement  memorandum to which a copy of
               the Preliminary Prospectus is attached;

         (d)   "Qualified  Institutional Buyer" means a "qualified institutional
               buyer" as defined in Rule 144A.

         (e)   "Regulation  S" means  Regulation  S  promulgated  under the U.S.
               Securities Act;

         (f)   "Selling  Dealer  Group" means  dealers or brokers other than the
               Underwriters  and their U.S.  affiliates  who  participate in the
               offer and sale of Offered  Shares  pursuant  to the  Underwriting
               Agreement; and

         (g)   "Substantial U.S. Market Interest" means "substantial U.S. market
               interest" as that term is defined in Regulation S.

2.       Each  Underwriter,  each of their  respective U.S.  affiliates and each
         member of the Selling  Dealer  Group  acknowledges  and agrees that the
         Offered Shares have not been and will not be registered  under the U.S.
         Securities  Act,  and have not  been  and will not be  offered  or sold
         within the United  States or for the account or benefit of, a person in
         the  United  States,   except   pursuant  to  the  exemption  from  the
         registration  requirements of the U.S.  Securities Act provided by Rule
         144A.  Each  Underwriter  represents,  warrants and agrees that it, its
         U.S.  affiliates  and each  member of the  Selling  Dealer  Group  have
         offered  and sold and will offer and sell the  Offered  Shares  only in
         accordance  with Rule 903 of  Regulation  S or in  accordance  with the
         restrictions  set forth in  paragraphs 3 and 4 of this Schedule "A" and
         Rule 144A.  Accordingly,  no  Underwriter,  U.S.  affiliate  or Selling
         Dealer  Group  member,  or person  acting on any of their  behalf,  has
         engaged or will engage in any Directed Selling Efforts (as such term is
         defined in  Regulation  S) in the  United  States  with  respect to the
         Offered Shares.




3.       Each Underwriter represents,  warrants and covenants to the Corporation
         and the Selling  Shareholder  that, in  connection  with all offers and
         sales of the Offered Shares in the United States or for the account of,
         a person in the United States:

         (a)   it has not  entered  and will  not  enter  into  any  contractual
               arrangement  with  respect  to the  distribution  of the  Offered
               Shares, except (i) with its affiliates,  (ii) with members of the
               Selling Dealer Group in accordance with this paragraph 2 or (iii)
               otherwise with the prior written  consent of the  Corporation and
               it shall  require  each  member of the  Selling  Dealer  Group to
               agree,  for  the  benefit  of the  Corporation  and  the  Selling
               Shareholder,  to comply  with,  and shall use its best efforts to
               ensure that each member of the Selling  Dealer Group comply with,
               the  same  provisions  of  this  Schedule  "A" as  apply  to such
               Underwriter as if such  provisions  applied to such member of the
               Selling Dealer Group;

         (b)   its U.S. affiliate is duly registered as a broker or dealer under
               Section 15(b) of the U.S. Exchange Act and under the laws of each
               U.S.  state in which offers and sales of Offered Shares have been
               or will be made  (unless  exempted  from such state  registration
               requirements)  and is a member of, and in good standing with, the
               National  Association  of  Securities  Dealers,  Inc. on the date
               hereof and of each offer or sale of Offered  Shares in the United
               States;

         (c)   all offers and sales of the Offered  Shares in the United  States
               have  been  and  will  be  effected  by  its  U.S.  affiliate  in
               accordance   with  all   applicable   U.S.   federal   and  state
               broker-dealer requirements;

         (d)   its U.S. affiliate is a Qualified Institutional Buyer;

         (e)   each offeree will be provided  with a  Preliminary  U.S.  Private
               Placement   Memorandum  and  the  Final  U.S.  Private  Placement
               Memorandum  and  no  other  written  material  will  be  used  in
               connection  with the offer and sale of the Offered  Shares in the
               United States;

         (f)   neither it nor its  representatives  nor its U.S.  affiliate have
               used,  and none of such  persons  will use,  any form of  general
               solicitation  or  general  advertising  (within  the  meaning  of
               Regulation D of the U.S.  Securities  Act) in connection with the
               offer or sale of the Offered Shares in the United States;

         (g)   it will  solicit,  and will cause its U.S.  affiliate to solicit,
               offers for the Offered Shares in the United States only from, and
               will offer the  Offered  Shares  only to,  persons it  reasonably
               believes to be Qualified  Institutional Buyers in accordance with
               Rule 144A.  It also  agrees that it will  solicit  offers for the
               Offered  Shares only from, and will offer the Offered Shares only
               to, persons that in purchasing such Offered Shares will be deemed
               to have  made  the  representations,  warranties  and  agreements
               contained in the Final U.S. Private Placement Memorandum;

         (h)   it will  inform,  and cause its U.S.  affiliate  to  inform,  all
               purchasers  of the Offered  Shares in the United  States that the
               Offered Shares have not been and will not be registered under the
               U.S.   Securities   Act  and  are  being  sold  to  them  without
               registration  under the U.S.  Securities  Act in reliance on Rule
               144A;

         (i)   at least  one  Business  Day  prior to the  Closing  Date and any
               Additional  Closing  Date,  it shall cause its U.S.  affiliate to
               provide the Corporation and the Corporation's  transfer agent and
               registrar  with a list of all purchasers of the Offered Shares in

                                       2


               the United States; and

         (j)   each  offeree  in the  United  States  shall be  provided  with a
               Preliminary  U.S. Private  Placement  Memorandum and a Final U.S.
               Private  Placement  Memorandum,   which  shall  be  in  form  and
               substance satisfactory to the Corporation and shall set forth the
               following:

               "The  securities  offered  hereby  have  not been and will not be
               registered  under the U.S.  Securities Act and may not be offered
               or sold within the United  States except that  securities  may be
               offered or sold to  Qualified  Institutional  Buyers  pursuant to
               Rule 144A."

               "Each  U.S.  purchaser  hereof  will,  by its  purchase  of  such
               securities,  be deemed to have  represented  and  agreed  for the
               benefit  of  the  Corporation  and  the  Selling  Shareholder  as
               follows:

               (i)   it is aware that the securities  have not been and will not
                     be registered  under the U.S.  Securities  Act and the sale
                     contemplated hereby is being made. in reliance on Rule 144A
                     to Qualified Institutional Buyers;

               (ii)  it is a  Qualified  Institutional  Buyer as defined in Rule
                     144A under the US.  Securities  Act and it is acquiring the
                     securities  for its awn  account  or for the  account  of a
                     Qualified   Institutional   buyer  with  respect  to  which
                     exercises sole investment discretion;

               (iii) it  understands  that  if it  decides  to  offer,  sell  or
                     otherwise transfer such securities,  such securities may be
                     offered,  sold or  otherwise  transferred  only  (A) to the
                     Corporation,  (B) outside the United  States in  accordance
                     with Rule 904 of  Regulation  S or (C)  inside  the  United
                     States in  accordance  with (1) Rule 144A to a person  who,
                     the seller reasonably believes is a Qualified Institutional
                     Buyer  that is  purchasing  for its own  account or for the
                     account of a Qualified  Institutional  Buyer to whom notice
                     is given that the offer,  sale or transfer is being made in
                     reliance   on  Rule   144A  or  (2)  the   exemption   from
                     registration  under the 1933 Act  provided  by Rule 144, if
                     available; and

               (iv)  it  understands  that  all  securities  sold in the  United
                     States as part of this  offering  will bear a legend to the
                     following effect:

                     THE SECURITIES  REPRESENTED HEREBY HAVE NOT BEEN REGISTERED
                     UNDER THE UNITED STATES  SECURITIES ACT OF 1933, AS AMENDED
                     (THE  "SECURITIES  ACT). THE HOLDER  HEREOF,  BY PURCHASING
                     SUCH SECURITIES,  AGREES FOR THE BENEFIT OF THE CORPORATION
                     THAT SUCH  SECURITIES  MAY BE  OFFERED,  SOLD OR  OTHERWISE
                     TRANSFERRED ONLY (i) TO THE  CORPORATION,  (ii) OUTSIDE THE
                     UNITED STATES IN  ACCORDANCE  WITH RULE 904 OF REGULATION S
                     UNDER THE SECURITIES ACT, OR (iii) INSIDE THE UNTIED STATES
                     IN ACCORDANCE  WITH (A) RULE 144A UNDER THE  SECURITIES ACT
                     OR (B) RULE 144 UNDER THE  SECURITIES  ACT,  IF  AVAILABLE.
                     DELIVERY  OF  THIS  CERTIFICATE  MAY NOT  CONSTITUTE  "GOOD
                     DELIVERY" IN SETTLEMENT OF  TRANSACTIONS ON STOCK EXCHANGES
                     N CANADA. A NEW CERTIFICATE BEARING NO LEGEND,  DELIVERY OF
                     WHICH WILL CONSTITUTE  "GOOD DELIVERY" MAY BE OBTAINED FROM
                     OLYMPIA TRUST COMPANY,  AS REGISTRAR AND TRANSFER AGENT, OR
                     SUCH OTHER. ORGANIZATION OR ENTITY PERFORMING SUCH FUNCTION
                     FOR THE CORPORATION (THE "TRANSFER AGENT") UPON DELIVERY OF


                                       3


                     THIS CERTIFICATE AND A DULY EXECUTED DECLARATION, IN A FORM
                     SATISFACTORY TO THE TRANSFER AGENT AND THE CORPORATION,  TO
                     THE  EFFECT  THAT  THE SALE OF THE  SECURITIES  REPRESENTED
                     HEREBY IS BEING MADE IN COMPLIANCE WITH RULE 904 REGULATION
                     S UNDER THE SECURITIES ACT;

                     provided, that, if any such securities are being sold under
                     clause (ii) above, the legend may be removed by providing a
                     declaration  to o, as registrar and transfer  agent for the
                     securities, or such other organization or entity performing
                     such function for the Corporation (the "Transfer Agent') to
                     the following  effect (or as the  Corporation may from time
                     to time prescribe):

                         The undersigned (i)  acknowledges  that the sale of the
                         securities of Grey Wolf  Exploration Inc. to which this
                         declaration  relates is being made in  reliance on Rule
                         944 of Regulation S  ("Regulation  S") under the United
                         States   Securities   Act  of  1933,  as  amended  (the
                         "Securities  Act") and (ii)  certifies  that: (A) it is
                         not an  affiliate  of Grey Wolf  Exploration  Inc.  (as
                         defined  in Rule 405 under  the  Securities  Act),  the
                         offer of the securities was not made to a person in the
                         United  States and either (1) at the time the buy order
                         was  originated,  the  buyer  was  outside  the  United
                         States,  or the  seller  and any  person  acting on its
                         behalf  reasonably  believe  that the buyer was outside
                         the United States,  or (2) the transaction was executed
                         on or  through  the  facilities  of the  Toronto  Stock
                         Exchange,  and neither the seller nor any person acting
                         on its  behalf  knows  that  the  transaction  has been
                         prearranged  with a buyer  in the  United  States,  (B)
                         neither the seller nor any  affiliate of the seller nor
                         any person acting on any of their behalf has engaged or
                         will engage in any "directed  selling efforts" (as such
                         term is defined in  Regulation  S) in the United States
                         in   connection   with  the   offer  and  sale  of  the
                         securities,  (C) the sale is bona  fide and not for the
                         purpose  of  "washing  off'  the  resale   restrictions
                         imposed   because  the   securities   are   "restricted
                         securities"  (as that term is defined in Rule 144(a)(3)
                         under the  Securities  Act),  (D) the  seller  does not
                         intend to replace  the  securities  sold in reliance on
                         Rule  904  of   Regulation   8,  with  o   unrestricted
                         securities,  and  (E)  the  contemplated  sale is not a
                         transaction, or part of a series of transactions which,
                         although in technical  compliance with Regulation S, is
                         part of a plan or  scheme  to  evade  the  registration
                         provisions of the Securities Act;

                     provided,  further,  that, if any such securities are being
                     sold under clause (iii)(B) above, the legend may be removed
                     by delivery to the Transfer Agent of an opinion of counsel,
                     of  recognized  standing  reasonably  satisfactory  to  the
                     Corporation,  to the effect  that such  legend is no longer
                     required under applicable requirements of the 1933 Act."

         (k)   any offer, sale or solicitation of an offer to buy Offered Shares
               that has been made or will be made in the  United  States  was or
               will  be  made  only  to   Qualified   Institutional   Buyers  in


                                       4


               transactions that are exempt from  registration  under applicable
               state securities laws; and

         (l)   each offeree was provided with a copy of the Prospectus, together
               with a Final  U.S.  Private  Placement  Memorandum  and no  other
               written material,  other than a Preliminary Prospectus,  together
               with a Preliminary U.S. Private Placement  Memorandum was used in
               connection  with the offer or sale of the  Offered  Shares in the
               United States;

4.       At the Closing Time and any Additional  Closing Time, each Underwriter,
         together  with  its  U.S.   affiliate,   will  provide  a  certificate,
         substantially  in the form of Exhibit I to this Schedule "A",  relating
         to the manner of the offer and sale of the Offered Shares in the United
         States;  provided,  however,  than an  Underwriter  is not  required to
         provide such certificate if neither it nor its U.S.  affiliate has made
         any  offers or sales of the  Offered  Shares in the United  States,  in
         which case such Underwriter shall be deemed to represent and warrant to
         the Corporation as of the Closing Time or the Additional  Closing Time,
         as  applicable,  that all offers  and sales  made by it of the  Offered
         Shares were made in compliance with Rule 903 of Regulation S.

                                       5



                                    EXHIBIT I
                            UNDERWRITERS' CERTIFICATE

         In connection with the private placement of common shares (the "Offered
Shares") of Grey Wolf Exploration Inc. (the "Corporation") with one or more U.S.
institutional  investors (the "U.S.  Purchasers"),  the undersigned,  one of the
several  underwriters  (the  "Underwriters")  referred  to in  the  Underwriting
Agreement,   dated  as  of  February  18,  2005,  among  the  Corporation,   the
Underwriters and Abraxas Petroleum Corporation,  (the "Underwriting Agreement"),
and its U.S.  affiliate who has signed below in its capacity as placement  agent
in the United  States for such  Underwriter  (the "U.S.  Placement  Agent"),  do
hereby certify that:

         (a)   the U.S.  Placement  Agent is on the date hereof,  and was on the
               date of each  offer or sale of the  Offered  Shares in the United
               States, duly registered as a broker or dealer under Section 15(b)
               of the U.S. Exchange Act and under the laws of each U.S. state in
               which offers and sales of the Offered Shares have been or will be
               made (unless exempted from such state registration  requirements)
               and is and was a  member  of,  and in  good  standing  with,  the
               National  Association  of  Securities  Dealers,  Inc. on the date
               hereof and on such dates;

         (b)   all offers and sales of the Offered  Shares in the United  States
               have been effected by the U.S. Placement Agent in accordance with
               all applicable U.S. federal and state broker-dealer  requirements
               and U.S. state securities law requirements;

         (c)   each offeree was provided with a copy of the Prospectus, together
               with a Final  U.S.  Private  Placement  Memorandum  and no  other
               written material,  other than a Preliminary Prospectus,  together
               with a Preliminary U.S. Private Placement  Memorandum was used in
               connection  with the offer or sale of the  Offered  Shares in the
               United States;

         (d)   immediately  prior to transmitting  any of such materials to such
               offerees,  we had  reasonable  grounds to believe and did believe
               that each offeree was a Qualified  Institutional Buyer as defined
               in Rule 144A  under the U.S.  Securities  Act,  and,  on the date
               hereof,  we continue  to believe  that each U.S.  Purchaser  is a
               Qualified  Institutional  Buyer as defined in Rule 144A under the
               U.S. Securities Act;

         (e)   neither we nor our representatives have utilized,  and neither we
               nor  our  representatives  will  utilize,  any  form  of  general
               solicitation  or  general  advertising  (within  the  meaning  of
               Regulation D under the U.S. Securities Act); and

         (f)   we have  conducted  the offer and sale of the  Offered  Shares in
               accordance  with  the  Underwriting  Agreement,   Rule  144A  and
               Regulation  S. Terms used in this  certificate  have the meanings
               given  to them in the  Underwriting  Agreement  unless  otherwise
               defined herein.

Dated: ________________________, 2005

CIBC WORLD MARKETS INC.                      CIBC WORLD MARKETS CORP.


By:                                     By:
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    Name:                                   Name:
    Title:                                  Title: