EXHIBIT 12 ANADARKO PETROLEUM CORPORATION CONSOLIDATED STATEMENT OF COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES AND EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS Nine Months Ended September 30, 2000 and Five Years Ended December 31, 1999 Nine Months Ended September 30 Years Ended December 31 millions 2000 1999 1998 1997 1996 1995 Gross Income $716.0 $178.9 $ (7.4) $205.3 $196.8 $65.6 Rentals 10.6 11.1 12.5 8.3 4.2 2.5 Earnings 726.6 190.0 5.1 213.6 201.0 68.1 Gross Interest Expense 120.8 96.1 82.4 62.0 56.0 52.5 Rentals 10.6 11.1 12.5 8.3 4.2 2.5 Fixed Charges $131.4 $107.2 $ 94.9 $ 70.3 $ 60.2 $55.0 Preferred Stock Dividends 12.8 17.1 10.9 -- -- -- Combined Fixed Charges and Preferred Stock Dividends $144.2 $124.3 $105.8 $ 70.3 $ 60.2 $55.0 Ratio of Earnings to Fixed Charges 5.53 1.77 0.05 3.04 3.34 1.24 Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends 5.04 1.53 0.05 3.04 3.34 1.24 As a result of the Company's net loss in 1998, Anadarko's earnings did not cover fixed charges by $90 million and did not cover combined fixed charges and preferred stock dividends by $101 million. These ratios were computed by dividing earnings by either fixed charges or combined fixed charges and preferred stock dividends. For this purpose, earnings include income before income taxes and fixed charges. Fixed charges include interest and amortization of debt expenses and the estimated interest component of rentals. Preferred stock dividends are adjusted to reflect the amount of pretax earnings required for payment.