EXHIBIT 99.2

           THIS DEBENTURE HAS NOT BEEN REGISTERED UNDER THE SECURITIES
             ACT OF 1933, AS AMENDED, AND MUST BE HELD INDEFINITELY
              UNLESS SO REGISTERED OR TRANSFERRED IN A TRANSACTION
                            EXEMPT FROM REGISTRATION.


                       EXCHANGEABLE SUBORDINATED DEBENTURE

$3,000,000                                                    New York, New York
                                                              February 25 , 1997

         FOR VALUE RECEIVED, the undersigned,  AMERICAN INTERNATIONAL  PETROLEUM
CORPORATION  OF COLOMBIA , an Oklahoma  Corporation  (the "Company" or "Maker"),
promises to pay to the order of American International Petroleum Corporation,  a
Nevada Corporation  ("Payee"),  its successors and assigns, at Payee's office at
444 Madison Avenue,  New York, New York 10022, or such other place as the holder
may  designate in writing from time to time,  the principal sum of Three Million
and 00/xx Dollars ($3,000,000),  in lawful money of the United States,  together
with  simple  interest  in the  amount  of 5% per annum of such  principal  sum.
Interest  shall be payable in cash,  quarterly  in arrears  beginning  March 31,
1997.  All  outstanding  principal  and  accrued  and  unpaid  interest  on this
Debenture shall be due and payable on February 25, 1999; provided, however, that
(i) the  Payee may  demand a  partial  payment  in the  principal  amount of One
Million Five Hundred  Thousand and 00/xx  Dollars  ($1,500,000),  together  with
interest  accrued  thereon on February  25, 1998 by giving at least  thirty (30)
days notice prior thereto and the Company shall make such partial  prepayment in
cash on February 25, 1998,  or (ii) the  Debenture  may be exchanged  for common
shares of Mercantile International Petroleum Inc. ("MIP Shares") at such earlier
date as provided herein.

         Payee shall have the right to exchange all or portion of the  Debenture
from time to time into MIP Shares at anytime  commencing  February  25,  1998 by
delivering  the Debenture to Equity  Transfer  Services  Inc., the registrar and
transfer agent of Mercantile International Petroleum Inc. ("Mercantile") (or any
successor transfer agent of Mercantile (the "Transfer Agent")) who shall deliver
to the  holder  of the  Debenture  (i) the  number  of MIP  Shares  equal to the
principal amount of Debenture being converted  divided by $3.00, as adjusted for
any  dilutive  effect  referred to in Paragraph 4 of Exchange  Rights  Agreement
dated  February 25, 1997 between  Mercantile  and Mthe unpaint of the  Debenture
being  redeemed  through  the date of payment and (ii) a new  Debenture,  having
identical terms hereof,  for the portion of the Debenture  tendered which is not
converted as provided hereunder.

         Mercantile  shall have the right to cause an automatic  exchange of all
or part of the  Debenture  at such time as the  closing  price of the MIP Shares
traded on The  Toronto  Stock  Exchange  (or such other  Exchange  which the MIP
Shares may be traded if not traded on The Toronto  Stock  Exchange)  for each of
the  twenty  (20)  trading  days  ending on the  sending  of the  notice of such
conversion  is equal to or above $3.50 per share and the average  daily  trading
volume for such period  exceeded  50,000 Common Shares.  Mercantile may exercise
such option by sending  notice in writing to the holder of the  Debenture.  Such
holder will deliver to the Transfer  Agent the Debenture and the Transfer  Agent
shall deliver to the holder of the Debenture,  the items referred to in (i) (ii)
and above (iii) above,  as if Payee had  exchanged  the portion of the Debenture
being automatically converted pursuant to this paragraph.

         This  Debenture  may not be prepaid,  except as  specifically  provided
above, in whole or in part at any time.

         This Debenture may be sold, pledged,  assigned or otherwise disposed of
(whether  voluntarily  or  involuntary),  provided  such disposal is exempt from
registration  under United States  federal and any applicable  state  securities
laws. The Company shall, without charge,  execute and deliver a new Debenture in
the name of the assignee named in such instrument of assignment and this






Debenture shall be promptly  cancelled.  Any Debentures issued upon the transfer
or exercise in part of this Debenture  shall be numbered and shall be registered
in a Debenture  Register of the Company as they are issued. The Company shall be
entitled  to treat the  registered  holder  of any  Debenture  on the  Debenture
Register as the owner in fact thereof for all purposes and shall not be bound to
recognize any  equitable or other claim to or interest in such  Debenture on the
part of any other person.  A holder of a Debenture may also have this  Debenture
reissued in denominations of not less than $100,000.

         The  Maker  hereby  agrees,  and the  holder of this  Debenture  by the
holder's  acceptance  hereof  agrees,  that the payment of the  principal of and
interest on this Debenture is hereby  expressly made  subordinate  and junior in
right of payment to the prior  payment in full of all Senior  Debt,  Capitalized
Leases or  Permitted  Liens,  (each as  hereinafter  defined) of the Maker.  The
holder of this Debenture agrees, as part of such subordination, as follows:

                  (a) In the event of insolvency or bankruptcy  proceedings,  or
any receivership,  liquidation,  reorganization or other similar  proceedings in
connection  therewith,  relative  to the Maker or to any of the  property of the
Maker, or in the event of any proceedings for voluntary liquidation, dissolution
or other  winding-up  of the  Maker,  whether  or not  involving  insolvency  or
bankruptcy,  then the holders of Senior Debt,  Capitalized  Leases and Permitted
Liens  shall be  entitled  to receive  payment in full of all  principal  of and
premium,  if any,  and  interest  on all  Senior  Debt,  Capitalized  Leases and
Permitted Liens before the holder of this Debenture shall be entitled to receive
any payment on account of principal or interest on this  Debenture,  and to that
end the holders of Senior Debt shall be entitled to receive for  application  in
payment thereof any payment or distribution of any kind or character, whether in
cash or property or securities,  which may be payable or deliverable in any such
proceedings in respect of this Debenture.

                  (b) In the event that the holder of this Debenture  shall have
received  written  notice to the  effect  that an event of  default  shall  have
occurred  on any  Senior  Debt,  Capitalized  Leases or  Permitted  Liens and be
continuing  (under  circumstances  in  which  the  provisions  of the  foregoing
paragraph (a) are not  applicable),  then,  during the  continuance  of any such
event of default,  all  principal  of and  premium,  if any, and interest on all
Senior Debt,  Capitalized  Leases or Permitted Liens  outstanding at the time of
such  notice  shall  first be paid in full,  before  any  payment  on account of
principal or interest is made upon this Debenture.

         The  provisions  of this  paragraph are for the purpose of defining the
relative rights of the holders of Senior Debt,  Capitalized  Leases or Permitted
Liens on the one hand,  and the  holder  of this  Debenture  on the other  hand,
against the Maker and its property;  and nothing herein shall impair, as between
the Maker and the holder of this Debenture,  the obligation of the Maker,  which
is unconditional and absolute,  to pay to the holder hereof the principal hereof
and the interest hereon in accordance with the terms and provisions  hereof; nor
shall anything  herein prevent the holder of this Debenture from  exercising all
remedies  othany,  under this  paragraph of holders of Senior Debt,  Capitalized
Leases or  Permitted  Liens to  receive  cash,  property,  stock or  obligations
otherwise payable or deliverable to the holder of this Debenture.

         For the purpose of this Debenture:

                  (a) "Debt" of any  corporation  shall mean,  at any date,  all
indebtedness  of such  corporation  which would,  in accordance  with  generally
accepted accounting principles, be classified as indebtedness, whether funded or
current, but in any event including:

                           (i)  all   indebtedness   guaranteed,   directly   or
indirectly,  in any manner by such corporation or in effect guaranteed  directly
or indirectly by such corporation through an agreement, contingent or otherwise,
to supply funds

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to or in any other manner invest in the debtor,  to purchase  indebtedness or to
purchase  goods,  supplies or services for the purpose of enabling the debtor to
make  payment of the  indebtedness  or to assure  the owner of the  indebtedness
against loss, or otherwise;

                           (ii) all  indebtedness for the payment of purchase of
which such  corporation  has agreed,  contingently  or otherwise,  to advance or
supply funds;

                           (ii) all indebtedness secured by any mortgage,  lien,
pledge,  charge  or  encumbrance  of  any  kind  upon  property  owned  by  such
corporation,  even though such  corporation has not assumed or become liable for
the payment of such indebtedness; and

                           (iv) all indebtedness of such corporation  created or
arising  under any  conditional  sale or other title  retention  agreement  with
respect to  property  acquired by such  corporation,  even though the rights and
remedies of the seller or lender  under such  agreement  in the event of default
are limited to repossession of such property; and

                  (b) "Senior  Debt" shall mean the principal of and interest on
Debt  outstanding  for money borrow  instruments  or by a loan agreement or loan
agures, bonds,  mortgages,  deeds of trust or similar instruments (excluding any
of such Debt which by the terms of the  instrument  creating or  evidencing  the
same is subordinated to or pari passu with this Debenture).

                  (c)  "Capitalized  Lease"  shall  mean items of  equipment  or
machinery  acquired by the Maker so long as the lender's  security is limited to
such equipment or machinery, and any proceeds from the sale thereof.

                  (d) "Permitted  Liens" shall mean (i) any lien securing a tax,
assessment or other  governmental  charge or levy or the claim of a materialman,
mechanic,  carrier,  warehouseman or landlord for labor, materials,  supplies or
rentals  incurred  in the  ordinary  course  of  business;  and  (ii)  any  lien
constituting an encumbrance in the nature of zoning restrictions,  easements and
rights  or  restrictions  of record  on the use of real  property  that does not
materially  detract from the value of such property or impair the use thereof in
the business of the Maker.

         Subject to the rights of the holder of the Senior Debt and as otherwise
expressly provided herein, Maker hereby waives demand, protest,  presentment for
payment,  notice of  dishonor,  notice of protest,  diligence  in bringing  suit
against any party,  and hereby  consents that the time for payment of all or any
part of the principal amount, and of the interest thereon,  may be extended from
time to time by Payee  without  notice,  and that any such  extension  shall not
discharge or otherwise impair the obligations represented by this Debenture. The
foregoing  waivers shall not be deemed to waive the  requirement  of any notice,
demand or cure periods expressly provided for in this Debenture.

         THE  COMPANY  AND ANY  HOLDER  OF THIS  DEBENTURE  HEREBY  WAIVES  T IN
CONNECTION  WITH OR IN ANY WAY RELATED TO THIS  DEBENTURE OR THE  ENFORCEMENT OF
ANY OF THE HOLDER'S  RIGHTS AND  REMEDIES.  THE COMPANY  AND, BY ITS  ACCEPTANCE
HEREOF,  EACH HOLDER OF THIS DEBENTURE,  ACKNOWLEDGES  THAT IT MAKES THIS WAIVER
KNOWINGLY,   VOLUNTARILY   AND  ONLY  AFTER   THOROUGH   CONSIDERATION   OF  THE
RAMIFICATIONS  OF THIS  WAIVER  WITH ITS  ATTORNEY.  NEITHER THE COMPANY NOR ANY
HOLDER OF THIS DEBENTURE HAS AGREED WITH OR REPRESENTED TO THE OTHER

         All actions or  proceedings  with  respect to this  Agreement  shall be
instituted  exclusively  in the courts of the State of New York, New York County
or the  United  States  District  Court  sitting in New York,  New York,  and by
execution  and  delivery  of  this  Agreement,   both  parties  irrevocably  and
unconditionally  submit to the  personal  jurisdiction  of each such court,  and
irrevocably and unconditionally waive (X) any objection to the propriety of

                                       -3-




jurisdiction,  service of process or venue in any of such courts,  (Y) any right
to a jury trial, and (Z) any claim that any action or proceeding  brought in any
of such courts has been brought in an inconvenient forum.

         The Company hereby  irrevocably  designates,  appoints and empowers C T
Corporation Systems with offices on the date hereof at 1633 Broadway, N.Y., N.Y.
10019 as its designee,  appointee and agent to receive,  accept and  acknowledge
for and on its behalf,  and in respect of its  property,  service of any and all
legal process,  summons, notices and documents which may be served in any action
or  proceeding  arising out of or related to this  Debenture.  If for any reason
such  designee,  appointee and agent shall cease to be available to act as such,
Issuer agrees to designate a new  designee,  appointee and agent in the State of
New York on the terms and for the  purposes of this  provision  satisfactory  to
Pledgee.  The Company further irrevocably  consents to service of process out of
court in any such  action or  proceeding  by the  mailing  of copies  thereof by
registered or certified mail, postage prepaid,  to the address for notice of the
Company  below,  such  notice to become  effective  30 days after such  mailing.
Nothing herein shall affect the right of the Payee to serve process in any other
manner  permitted by law or to commence legal  proceedings or otherwise  against
Issuer, as the case may be, in any other jurisdiction.

         All  demands  and  notices  to be given  hereunder  shall be  delivered
personally or sent by recognized  national overnight courier; in the case of the
Company,  addressed to its corporate  office at  Mountbattan  House,  9 Westhill
Street, P.O. Box N-10543,  Nassau,  Bahamas Attention:  Jeffrey Waterous, and in
the case of Payee, addressed to the address written above, in either case, until
a new address shall have been substituted by like notice.

         This  Debenture  shall be governed by and construed in accordance  with
the laws of the State of New York and shall be binding upon the  successors  and
assigns  of the Maker and inure to the  benefit of the  Payee,  its  successors,
endorsees and assigns.  If any term or provision of this Debenture shall be held
invalid,  illegal  or  unenforceable,  the  validity  of  all  other  terms  and
provisions hereof shall in no way be affected thereby.

         IN WITNESS  WHEREOF,  the  Company  has  caused  this  Debenture  to be
executed on its behalf by its duly authorized  officer on the day and year first
above written.

                               AMERICAN INTERNATIONAL PETROLEUM CORPORATION
                               OF COLOMBIA

                               By:
                                   ----------------------------------
                                       Chief Financial Officer

Acknowledged as to exercise rights:

MERCANTILE INTERNATIONAL PETROLEUM INC.

By:
   -----------------------------------

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