1. U.S. Oil & Gas Production Overview Includes data supplied by IHS; Copyright (2007) all rights reserved. April 27, 2007 Robert P. Sutton, Marathon Oil Company 

2. Source: USGS

3. U.S. Gas Well Locations Source: IHS MS Streets & Trips

4. U.S. Gas Production & Well Count Source: EIA

5. U.S. Gas Well Performance & Price Source: EIA

6. Gas Well – Location & Rate Source: IHS & ArcMap

7. Gas Well – Location & Rate Source: IHS & ArcMap

8. Average Gas Well Rate - State Source: EIA

9. Potential Liquid Loading - Basin Source: EIA

10. Distribution – Well Count & Annual Gas Production Source: IHS Marginal Well 75 MCFD Liquid Loading 300 MCFD

11. Gas Well Distribution with Time Source: IHS

12. Liquid Loaded Wells Over Time Source: IHS

13. Comparison of “Majors” & “Independents” Source: IHS

14. Summary - Gas 425,303 Gas Wells (2005 EIA) Avg Gas Rate is 113 MCFD/well (48 BCFD) The fraction of potentially liquid loaded wells has increased from 85% over the last 20 years Currently 91% of domestic gas wells have potential liquid loading issues These wells account for 26% of the gas production Average rate of unloaded wells – 1520 MCFD Average rate of loaded wells – 51 MCFD