Natural Gas Reserve Life 2006-7

All Financial Data in US Dollars.
Oil & Gas Operational
 Key Operating Data
  Key Operating Ratios
     Gas Reserves/Production (years) Data Growth
  2006 2007 2007
       Anadarko Petroleum Corp. 16 12   -25%  
       Apache Corporation 13 12   -7%  
       Apco Oil and Gas International Inc 9 8   -10%  
       Approach Resources Inc 16 34   +114%  
       Atlas Energy Inc 19 42   +124%  
       ATP Oil & Gas Corp. 11 10   -9%  
       Barnwell Industries Inc. 7 7   -3%  
       Berry Petroleum Corporation 18 20   +11%  
       Black Hills Corp 14 15   +3%  
       Brigham Exploration Company - 8   -  
       Cabot Oil & Gas Corp. 17 19   +13%  
       Callon Petroleum 6 9   +57%  
       Carrizo Oil & Gas, Inc - 15   -  
       Chesapeake Energy Corp. 16 15   -2%  
       Chevron Corporation 13 12   -4%  
       Chevron Corporation (Hess) 13 12   -4%  
       Cimarex Energy Co. 9 9   +7%  
       Clayton Williams Energy, Inc. - 6   -  
       CNX Gas Corp - 23   -  
       Comstock Resources, Inc. - 12   -  
       Concho Resources Inc - 19   -  
       ConocoPhillips 13 12   -7%  
       ConocoPhillips (Hess) 13 12   -7%  
       Continental Resources, Inc. - 16   -  
       Denbury Resources Inc. 10 10   +6%  
       Devon Energy Corporation 10 10   +2%  
       Dominion Energy, Inc. 16 5   -71%  
       Dorchester Minerals LP 7 7   +1%  
       El Paso Corp 9 10   +9%  
       Endeavour International Corp 14 2   -84%  
       Energen Corp - 17   -  
       Energy XXI Gulf Coast, Inc. - 8   -  
       EOG Resources 12 12   -0%  
       EPL Oil & Gas Inc 4 3   -30%  
       Epsilon Energy Ltd. - 26   -  
       EQT Corp - 32   -  
       EXCO Resources, Inc. - 16   -  
       ExxonMobil 18 18   +0%  
       ExxonMobil (Hess) 18 18   +0%  
       Forest Oil Corporation 11 14   +35%  
       Gastar Exploration Inc. 7 8   +25%  
       Goodrich Petroleum Corporation - 22   -  
       Gulfport Energy Corporation - 30   -  
       Harvest Oil & Gas Corp. - 27   -  
       Helix Energy Solutions Group 11 10   -9%  
       Hess Corporation 10 11   +7%  
       HighPoint Resources Corporation - 9   -  
       Houston Exploration Company 8 -   -  
       Kinder Morgan Energy Partners, L.P. 1 4   +489%  
       Kodiak Oil & Gas Corp. 21 12   -44%  
       Linn Energy - 38   -  
       Marathon Oil Corp. 12 11   -11%  
       Mariner Energy - 7   -  
       Maverick Natural Resources, LLC - 122   -  
       McMoRan Exploration Co. 3 6   +126%  
       MDU Resources Group 9 8   -4%  
       Murphy Oil Corporation 19 24   +30%  
       National Fuel Gas 9 8   -13%  
       Newfield Exploration Company 8 10   +15%  
       Noble Energy 14 13   -7%  
       Oasis Petroleum Inc. - 17   -  
       Occidental Petroleum Corporation 15 15   -3%  
       PDC Energy, Inc. - 26   -  
       Penn Virginia Corporation - 16   -  
       Petrohawk Energy Corp 15 10   -34%  
       PetroQuest Energy, Inc - 6   -  
       Pioneer Natural Resources Company 18 20   +12%  
       Plains Exploration & Production 5 51   +857%  
       Pogo Producing Company 12 -   -  
       Questar 14 15   +7%  
       Quicksilver Resources Inc 23 19   -19%  
       Range Resources Corporation - 20   -  
       Rosetta Resources Inc. - 10   -  
       SandRidge Energy, Inc. - 25   -  
       SilverBow Resources, Inc. 14 17   +22%  
       SM Energy Company 9 9   +9%  
       Southwestern Energy Co. 14 13   -12%  
       Stone Energy Corporation 8 5   -40%  
       Thunderbird Resources Equity Inc. - 51   -  
       TransAtlantic Petroleum Ltd. 3 -   -  
       Ultra Petroleum Corporation 29 26   -10%  
       Unit Corp 9 10   +5%  
       Vaalco Energy Inc 2 3   +97%  
       Venoco 16 11   -29%  
       W & T Offshore - 4   -  
       Whiting Petroleum Corporation - 11   -  
       Williams Companies 13 12   -7%  
       XTO 16 18   +11%