11-Year Property Data (1)

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  1997   1998   1999   2000   2001   2002   2003  
Reserves (Net of royalties)
   Oil (MMBbls)		   219     166     439     406     527     444     530  
   Gas (Bcf)   1,403     1,440     2,785     3,045     5,024     5,836     7,217  
   NGLs (MMBbls)   24     21     55     50     108     192     209  
   Oil, Gas and NGLs (MMBoe)   477     427     958     963     1,472     1,609     1,941  
   10% Present Value Before Income Taxes (In millions) (2) $ 2,100     1,375     5,316     17,075     6,687     15,307     20,944  

Production (Net of royalties)
   Oil (MMBbls)		   29     20     25     37     36     42     47  
   Gas (Bcf)   180     189     295     417     489     761     858  
   NGLs (MMBbls)   3     3     5     7     8     19     22  
   Oil, Gas and NGLs (MMBoe)   62     55     79     113     126     188     211  

Average Prices
   Oil (per Bbl)		 $ 17.03     12.28     17.78     24.99     21.41     21.71     26.13  
   Gas (per Mcf) $ 2.04     1.78     2.09     3.53     3.84     2.80     4.52  
   NGLs (per Bbl) $ 12.61     8.08     13.28     20.87     16.99     14.05     18.63  
   Oil, Gas and NGLs (per Boe) $ 14.51     11.09     14.22     22.38     22.19     17.61     26.04  

Unit Production and Operating Expense (per Boe)		 $ 4.63     4.29     4.15     4.81     5.29     4.71     5.79  

  2004   2005   2006   2007  

5-Year
Compound
Growth Rate 		10-Year
Compound
Growth Rate
Reserves (Net of royalties)
   Oil (MMBbls)		   484     555     634     677     9 %   12 %
   Gas (Bcf)   7,385     7,192     8,259     8,994     9 %   20 %
   NGLs (MMBbls)   232     246     275     321     11 %   29 %
   Oil, Gas and NGLs (MMBoe)   1,946     2,000     2,286     2,496     9 %   18 %
   10% Present Value Before Income Taxes (In millions) (2)   20,950     32,350     22,146     32,852     17 %   32 %

Production (Net of royalties)
   Oil (MMBbls)		   54     46     42     55     6 %   7 %
   Gas (Bcf)   883     819     808     863     3 %   17 %
   NGLs (MMBbls)   24     24     23     26     6 %   25 %
   Oil, Gas and NGLs (MMBoe)   225     206     200     224     4 %   14 %

Average Prices
   Oil (per Bbl)		   29.12     38.64     57.39     63.98     24 %   14 %
   Gas (per Mcf)   5.34     7.03     6.08     5.99     16 %   11 %
   NGLs (per Bbl)   23.06     29.05     32.10     37.76     22 %   12 %
   Oil, Gas and NGLs (per Boe)   30.38     39.89     40.38     42.96     20 %   11 %

Unit Production and Operating Expense (per Boe)		   6.38     7.65     8.81     9.68     16 %   8 %

(1) The years 1997 through 2002 exclude results from Devon's operations in Indonesia, Argentina and Egypt that were discontinued in 2002. The years 2003 through 2007 exclude results from operations in Africa that were discontinued in 2006 and 2007. Data has been restated to reflect the 1998 merger of Devon and Northstar and the 2000 merger of Devon and Santa Fe Snyder in accordance with the pooling-of-interests method of accounting.

(2) Estimated future revenue to be generated from the production of proved reserves, net of estimated future production and development costs, discounted at 10% in accordance with SFAS No. 69, Disclosures about Oil and Gas Producing Activities. Devon believes that the pre-tax 10% present value is a useful measure in addition to the after-tax value as it assists in both the determination of future cash flows of the current reserves as well as in making relative value comparisons among peer companies. The after-tax present value is dependent on the unique tax situation of each individual company while the pre-tax present value is based on prices and discount factors which are consistent from company to company. We also understand that securities analysts use this pre-tax measure in similar ways.