EXHIBIT 12 VASTAR RESOURCES, INC. STATEMENT SETTING FORTH DETAIL OF COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Unaudited) For the three months ended March 31, ------------- 1999 1998 ----- ------ (Millions of dollars, except per share amounts) Income from continuing operations before income taxes, minority interest and cumulative effect of change in accounting principle(1)....... $(5.4) $32.6 Fixed Charges: Interest expense charged to income, and portion of rentals representative of interest(2)........... 21.6 12.6 Capitalized Interest.................... 0.0 0.0 ----- ----- Total fixed charges..................... 21.6 12.6 ----- ----- Earnings (1) + (2) $16.2 $45.2 ===== ===== Ratio of earnings to fixed charges 0.8 3.6 ===== ===== The Company has no issuances of preferred stock.