DATED AS OF APRIL __,1999

                                BENZ ENERGY LTD.

                                       AND

                        MONTREAL TRUST COMPANY OF CANADA

                          SECOND SUPPLEMENTAL INDENTURE



THIS SECOND SUPPLEMENTAL TRUST INDENTURE made as of the __ day of April, 1999

BETWEEN:

        BENZ ENERGY LTD., a corporation continued under the laws of the Yukon
        Territories having its registered office in the City of Whitehorse in
        the Yukon Territories

                    (hereinafter called the "Corporation")

                                                              OF THE FIRST PART

                                     - and -


        MONTREAL TRUST COMPANY OF CANADA, a trust company incorporated under
        the laws of Canada and having an office in the City of Calgary in the
        Province of Alberta

                      (hereinafter called the "Trustee")

                                                            OF THE SECOND PART

WHEREAS the Corporation and the Trustee entered into a Trust Indenture dated
as of March 25, 1998, as supplemented by that certain First Supplemental
Trust Indenture dated as of April 8, 1998 (collectively, the "Trust
Indenture"); and

WHEREAS the Corporation created and issued Debentures as provided under the
terms of the Trust Indenture; and

WHEREAS the Corporation desires to become domesticated in the State of
Delaware and in connection therewith has requested that the Trust Indenture
be amended in anticipation of such migration; and

WHEREAS the Corporation and the Trustee now desire to amend the Trust
Indenture in certain respects to reflect amendments that have been approved
by one or more Extraordinary Resolutions passed by Debentureholders in
accordance with the terms of Article 9 of the Trust Indenture, those
amendments are more fully set forth below; and

WHEREAS the Corporation and the Trustee now desire to amend the Terms and
Conditions of 9% Convertible Debentures, Series 1 issued in accordance with
the terms of the Trust Indenture in certain respects to reflect amendments
that have been approved by the Series 1 Debentureholders pursuant to an
Extraordinary Resolution passed in accordance with the terms of Article 9 of
the Trust Indenture at a meeting held on April ___, 1999, those amendments
are more fully set forth below.



NOW, THEREFORE, in consideration of the premises and the mutual covenants
contained in this SECOND SUPPLEMENTAL INDENTURE and intending to be legally
bound, the undersigned agree as follows:

1.       AMENDMENT TO TRUST INDENTURE. The Trust Indenture shall remain in full
         force and effect subject to the following amendments"

1.1      The definition of Affiliate in Article 1.1 of the Trust Indenture is
         hereby amended by deleting the phrase "BUSINESS CORPORATIONS ACT
         (Yukon)" and inserting therefor the following:

         "General Corporation Law of the State of Delaware"

1.2      Article 1.1 of the Trust Indenture is hereby amended by deleting the
         definition of "Counsel" and inserting therefor the following:

         "COUNSEL" means a barrister or solicitor or attorney or firm of
         barristers and solicitors or firm of attorneys retained by the Trustee
         or retained by the Corporation and acceptable to the Trustee

1.3      Article 1.1 of the Trust Indenture is hereby amended by deleting the
         definition of "Long Term Debt" and inserting therefor the following:

         "LONG TERM DEBT" means (i) amounts classified as long term debt as
         specified in the Corporation's and its Subsidiaries' audited financial
         statements or their audited consolidated financial statements, as the
         case may be, and shall include any amounts outstanding under the Bank
         One Credit Facility and the EnCap Credit Facility plus (ii) the nominal
         amount of any preferred stock issued by the Corporation and its
         Subsidiaries;

1.4      Article 1.1 of the Trust Indenture is hereby amended by deleting the
         definition of "Taxes" and inserting therefor the following:

         "TAXES" means all taxes of any kind or nature whatsoever including,
         without limitation, all federal, provincial, municipal and local taxes,
         income taxes, capital taxes, levies, imposts, stamp taxes, royalties,
         duties, charges to tax, value added taxes, commodity taxes, goods and
         services taxes, excise taxes, business taxes, property taxes and
         withholding taxes charged, levied, collected, withheld or assessed by
         any relevant authority within any jurisdiction in Canada or the United
         States having power to tax together with any penalties, fines,
         additions to tax and interest thereon and any instalments in respect
         thereof and, for greater certainty, does not include taxes charged,
         levied, collected, withheld or assessed by an authority outside Canada
         or the United States;

1.5      The first sentence of Article 4.3(a) of the Trust Indenture is hereby
         amended by deleting the phrase "shall be adjusted by multiplying the
         Conversion Price then in effect by a fraction the

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         numerator of which is the number of Common Shares outstanding
         immediately following such event" and inserting therefor the following:

         "shall be adjusted by multiplying the Conversion Price then in effect
         by a fraction the numerator of which is the number of Common Shares
         outstanding immediately prior to such event and the denominator of
         which is the number of Common Shares outstanding immediately following
         such event"

1.6      Article 4.3(c) of the Trust Indenture is hereby amended by deleting the
         phrase "a number of Common Shares equal to the number of additional
         Common Shares offered for subscription or purchase (or the aggregate
         Conversion or Exchange Price of the convertible securities so offered)
         by such Current Market Price per Common Shares, and of which the
         denominator" and inserting therefor the following:

         "a number of Common Shares equal to the number of additional Common
         Shares that the aggregate of the proceeds to be realized from the
         issuance of the rights or warrants so offered (or the aggregate
         conversion or exchange price of the convertible securities so offered)
         would purchase at the then Current Market Price, and of which the
         denominator"

1.7      Article 4.4 of the Trust Indenture is hereby amended by deleting the
         phrase "lawful money of Canada" and inserting therefor the following:

         "Dollars".

1.8      Article 4.6 of the Trust Indenture is hereby deleted and the following
         is inserted therefor:

         4.6      TAXES AND CHARGES ON CONVERSION

         The Corporation will from time to time promptly pay or make provision
         satisfactory to the Trustee for the payment of any and all taxes and
         charges which may be imposed by the laws of Canada or any province
         thereof or the laws of the United States or any State or other taxing
         authority thereof (except income tax, withholding tax, security
         transfer tax, if any, or taxes or levies which are in substance of the
         same nature as any of the foregoing) which shall be payable with
         respect to the issuance and/or delivery to the holders of Convertible
         Debentures, upon the exercise of their right to conversion, of Common
         Shares of the Corporation pursuant to the terms of the Convertible
         Debentures and of this Indenture.

1.9      Article 4.11 of the Trust Indenture is hereby amended by deleting
         paragraph (d) and inserting therefor the following:


         (d)      "CURRENT MARKET PRICE" per Common Share on any date shall be
                  the weighted average price per Common Share for 20 consecutive
                  trading days commencing not more than 30 trading days and
                  ending not less than five trading days before such date

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                  on the principal stock exchange on which the Common Shares are
                  traded (if the Common Shares are traded on exchanges in Canada
                  and the United States, then the price from the United States
                  Exchange shall be used). The weighted average price shall be
                  determined by dividing the aggregate sale price of all Common
                  Shares sold on the said exchange, as the case may be, during
                  the said 20 consecutive trading days by the total number of
                  Common Shares so sold;

1.10     Article 5.9 of the Trust Indenture is hereby deleted and the following
         is inserted therefor:

         5.9      LONG TERM DEBT AND TANGIBLE ASSETS

         For the Corporation's fiscal years ending December 31, 1998 and 1999,
         the Corporation will, so long as any Debenture is outstanding, maintain
         Tangible Assets equal to or greater than 100% of Long Term Debt at all
         times including after redemption of any redeemable preference shares of
         the Corporation or any Subsidiary. For each of the Corporation's fiscal
         years ending after December 31 1999, the Corporation will, so long as
         any Debenture is outstanding, maintain Tangible Assets equal to or
         greater than 140% of Long Term Debt at all times including after
         redemption of any redeemable preference shares of the Corporation or
         any Subsidiary. This ratio shall be calculated no later than the 135th
         day following the end of each of the Corporation's fiscal years, and
         shall be based upon the Corporation's annual audited financial
         statements (as adjusted for Tangible Assets) and the Independent
         Reserve Reports. For purposes of this Article, the definition of (i)
         "Long Term Debt" shall not include obligations related solely to the
         sale, purchase or delivery of hydrocarbons in respect of production
         payments (whether volumetric or dollar denominated) or net profits
         interests conveyed in transfers to third parties; and (ii) "Tangible
         Assets" shall not include the value of any hydrocarbons which have been
         conveyed as part of such production payment or net profits interest.

1.11     Article 5.10(a) of the Trust Indenture is hereby deleted.

1.12     Article 5.16 of the Trust Indenture is hereby deleted and the following
         is inserted therefor:

         5.16     WITHHOLDING AND REPORTING REQUIREMENTS

         To the extent permitted by law, the Corporation will provide to the
         Trustee, the Paying Agent or to any Debenture Holder such statements,
         certificates or other documentation concerning the organization or
         operations of the Corporation as may be reasonably necessary to
         establish any exceptions or exemptions from income tax withholding and
         reporting requirements of any taxing authority within Canada or the
         United States.

1.13     Article 5.17 of the Trust Indenture is hereby deleted and the following
         is inserted therefor:

         5.17     MAINTENANCE OF LISTINGS FOR COMMON SHARES AND DEBENTURES

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         While any Convertible Debenture remains outstanding, the Corporation
         will maintain a listing for its common shares on a nationally
         recognized stock exchange in Canada or the United States and, while any
         Convertible Debenture Series 1 is outstanding, will use its best
         efforts to maintain a listing for the Convertible Debentures Series 1
         on the Luxembourg Stock Exchange or such alternative stock exchange as
         the Trustee may approve. For purposes of this Trust Indenture, a
         nationally recognized United States stock exchange shall include the
         bulletin board maintained by Nasdaq.

1.14     Article 7.3 of the Trust Indenture is hereby amended by deleting the
         phrase "of Canada" and inserting therefor the following:

         "of the United States"

1.15     The first grammatical paragraph of Article 8.1 of the Trust Indenture
         is hereby deleted and the following is inserted therefor:

         The Corporation shall not enter into any transaction, whether by way of
         amalgamation, merger, reconstruction, reorganization, consolidation,
         transfer, sale, lease or otherwise, whereby all or substantially all of
         its undertaking, property and assets would become the property of any
         other Person or, in the case of any such amalgamation, of the
         continuing corporation resulting therefrom, but may do so if:

1.16     Article 8.1 of the Trust Indenture is hereby amended by deleting
         paragraph (a) and inserting therefor the following:

         (a)      such other Person or continuing corporation is a corporation
                  (the "Successor Corporation") incorporated under the laws of
                  Canada or any province thereof or any state of the United
                  States;

1.17     Article 9.1 of the Trust Indenture is hereby amended by deleting the
         phrase "Calgary" and inserting therefor the following:

         "Houston, Texas".

1.18     Article 10.4 of the Trust Indenture is hereby amended by deleting the
         first grammatical paragraph and inserting therefor the following:

         If the Trustee determines that mail service is or is threatened to be
         interrupted at the time when the Trustee is required or elects to give
         any notice to the Holder of Registered Debentures hereunder, the
         Trustee shall, notwithstanding the provisions hereof, give such notice
         by means of publication in (i) The Globe and Mall, national edition, or
         any other English language daily newspaper or newspapers of general
         circulation in Canada and in a French language dally newspaper of
         general circulation in the Province of Quebec; and (ii)

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         the Houston Chronicle or any successor newspaper, in all cases once in
         each of two successive weeks, and any notice so published shall be
         deemed to have been given on the latest date on which the first
         publication takes place.

1.19     Article 11.8 of the Trust indenture is hereby amended by deleting the
         phrase "chartered bank of Canada" and inserting therefor the following:

         Bank chartered in the United States and subject to regulation by the
         Federal Deposit Insurance Corporation.

2.       AMENDMENTS TO THE TERMS AND CONDITIONS OF THE 9% CONVERTIBLE
         DEBENTURES, SERIES 1.

         Attached hereto as Exhibit A are Amendments to the Terms and Conditions
         of 9% Convertible Debentures, Series 1 (the "Series 1 Convertible
         Debentures"), which amendments have been approved by the holders of the
         Series 1 Convertible Debentures.

3.       AMENDMENTS TO THE TERMS AND CONDITIONS OF THE 9% CONVERTIBLE
         DEBENTURES, SERIES 2.

         Attached hereto as Exhibit B are Amendments to the Terms and Conditions
         of 9% Convertible Debentures, Series 2 (the "Series 2 Convertible
         Debentures"), which amendments have been approved by the holders of the
         Series 2 Convertible Debentures.

4.       AMENDMENTS TO THE TERMS AND CONDITIONS OF THE 9% CONVERTIBLE
         DEBENTURES, SERIES 3.

         Attached hereto as Exhibit C are the Amendments to the Terms and
         Conditions of 9% Convertible Debentures, Series 3 (the "Series 3
         Convertible Debentures"), which amendments have been approved by the
         holders of the Series 3 Convertible Debentures.

5.       CONDITIONAL AMENDMENT TO THE TRUST INDENTURE.

         The amendments to the Trust Indenture set forth in Article 1 above are
         conditioned upon the receipt by the Corporation and Trustee of
         appropriate evidence of approval from the Holders of any other Series
         of Debentures that is required to approve amendments to the Trust
         Indenture. The execution of this Supplement by the Corporation and the
         Trustee shall be evidence of the satisfaction of this requirement. The
         amendments to the Terms and Conditions of the respective Series to the
         Trust Indenture set forth on the Exhibits attached shall become
         effective upon appropriate approval of the holders of such Series.

6.       COUNTERPARTS AND FORMAL DATE

         This Supplemental Indenture may be executed in several counterparts,
         each of which when so executed shall be deemed to be an original, and
         such counterparts together shall constitute one and the same instrument
         and notwithstanding their date of execution shall be deemed to

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         bear date as of the ____ day of April, 1999. The execution of this
         First Supplemental Indenture has been authorized pursuant to the terms
         of an Extraordinary Resolution approved by the Holders of the Series 1
         9% Convertible Debentures at a meeting of such Holders on April ___,
         1999.

7.       GOVERNING LAW

         This Supplemental Indenture shall be governed by and construed in
         accordance with the laws of the Province of Ontario and the laws of
         Canada applicable therein and shall be treated in all respects as
         Ontario contracts.

8.       LANGUAGE OF SUPPLEMENTAL INDENTURE

         The parties hereto have requested that this document be drafted in the
         English language.

         Les parties ont demande que le present document soit redige en langue
         anglaise.

         IN WITNESS WHEREOF the parties hereto have executed this Second
Supplemental Indenture under their respective corporate seals and the hands
of their proper officers duly authorized in that behalf on the date first
hereinabove written.

                                       BENZ ENERGY LTD.

                                       By: /s/ Robert S. Herlin, CFO & SVP
                                          -------------------------------------
                                                                            c/s

                                       MONTREAL TRUST COMPANY OF CANADA

                                       By:
                                          -------------------------------------
                                                                            c/s

                                       By:
                                          -------------------------------------
                                                                            c/s

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