EXHIBIT 12 VASTAR RESOURCES, INC. STATEMENT SETTING FORTH DETAIL OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Unaudited) For the Nine Months Ended September 30, ----------------- (Millions of dollars, 1999 1998 except per share amounts) ------ ------ Income from continuing operations before income taxes, minority interest and cumulative effect of change in accounting principle(1)..... $109.9 $ 65.7 Fixed Charges: Interest expense charged to income and portion of rentals representative of interest(2)....... 63.2 42.7 Capitalized Interest............................ 0.3 0.0 ------ ------ Total fixed charges.............................. 63.5 42.7 ------ ------ Earnings (1) + (2)............................... $173.4 $108.4 ====== ====== Ratio of earnings to fixed charges............... 2.7 2.5 ====== ====== The Company has no issuances of preferred stock.