1 EXHIBIT 1.1 TERMS AGREEMENT June 22, 1999 Apache Corporation 2000 Post Oak Boulevard, Suite 100 Houston, Texas 77056-4400 Dear Sirs: The undersigned underwriters (the "Underwriters") understand that Apache Corporation (the "Company") proposes to issue and sell $150,000,000 aggregate principal amount of its debt securities (the "Offered Securities"). Subject to the terms and conditions set forth herein or incorporated by reference herein, the Underwriters offer to purchase, severally and not jointly, the principal amount of Offered Securities set forth below opposite their respective names at 99.077% of the principal amount thereof together with accrued interest thereon from June 25, 1999 to the Closing Time: Principal Amount of Underwriter Debt Securities ----------- --------------- Bear, Stears & Co. Inc. $ 100,000,000 Warburg Dillon Read LLC $ 50,000,000 --------------- Total $ 150,000,000 =============== The Offered Securities shall have the following terms: Principal amount: $150,000,000 Form: registered book-entry form Denomination: $1,000 and integral multiples thereof Date of maturity: July 1, 2019 Interest rate, rates or formula (or method of calculation of interest accrual): 7.625% per annum Date from which interest accrues: June 25, 1999 Interest payment dates, if any: January 1 and July 1 (commencing January 1, 2000) Initial price to public: $149,053,500 (99.369%) Closing Time: June 25, 1999 Place of delivery: New York, New York 2 Company account for wire transfer of payment: Apache Corporation Master Account, First National Bank of Chicago No. 5577446; ABA No. 071000013 Redemption provisions, if any: none Lock-up pursuant to Section 3(i) of the Basic Terms, as defined below: yes Securities Exchanges, if any, on which application will be made to list the Offered Securities: none Delayed Delivery Contracts: not authorized Delivery date: Expiration date: Compensation to Underwriters: Minimum contract: Maximum aggregate principal amount: Other terms, if any: Letters of Arthur Andersen LLP, in form and substance satisfactory to the Underwriters, will be delivered at Closing Time in satisfaction of Section 4(d) of the Basic Terms. The Underwriters agree to pay the reasonable fees and disbursements of counsel for the Underwriters pursuant to Section 5(e) of the Basic Terms. All the provisions contained in "Apache Corporation-Debt Securities--Underwriting Agreement Basic Terms" (the "Basic Terms"), filed as an exhibit to the Registration Statement relating to the Offered Securities and attached hereto as Annex A, are herein incorporated by reference in their entirety and shall be deemed to be a part of this Terms Agreement to the same extent as if such provisions had been set forth in full herein. Terms defined in such document are used herein as therein defined. Any notice by the Company to the Underwriters pursuant to this Terms Agreement shall be sufficient if given in accordance with Section 11 of the Basic Terms addressed to: Bear, Stearns & Co. Inc. 245 Park Avenue 4th Floor New York, New York 10167 Attention: Senior Managing Direct -- High Grade Capital Markets Telecopy No.: (212) 272-6227 2 3 which, for all purposes of this Agreement, shall be the "Representative". Very truly yours, BEAR, STEARNS & CO. INC. WARBURG DILLON READ LLC By: BEAR, STEARNS & CO. INC. Acting for themselves and as Representative of the Underwriters By: /s/ TIMOTHY A. O'NEILL -------------------------------- Name: Timothy A. O'Neill Title: Senior Managing Director Accepted: APACHE CORPORATION By: /s/ Matthew W. Dundrea ------------------------------------ Name: Matthew W. Dundrea Title: Vice President and Treasurer 3 4 ANNEX A [Apache Corporation--Debt Securities-- Underwriting Agreement Basic Terms] 4