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 2 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 3 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 4 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) 5 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 6 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 7