EXHIBIT 11.1 SNYDER OIL CORPORATION COMPUTATION OF PER SHARE EARNINGS (Unaudited) Quarter Ended March 31, -------------------------- 1998 1997 -------- --------- (In thousands, except share data) Net income applicable to common $ 1,838 $18,376 -------- --------- Effect of dilutive securities assuming conversion - 2,469 -------- --------- Net income applicable to common - assuming conversion $ 1,838 $20,845 ======== ========= Weighted average shares outstanding 33,372 31,030 Assumed exercise of vested common stock options net of treasury shares repurchased 210 172 Assumed conversion of 6% preferred stock - 5,052 Assumed conversion of debt - 3,578 -------- --------- Weighted average shares outstanding - assuming dilution 33,582 39,832 ======== ========= Basic earnings per share: Income per common share $ .06 $ .59 ======== ========= Diluted earnings per share: Income per common share - assuming dilution $ .05 $ .52 ======== =========