Exploration Drilling Success Rate 2006-7

All Financial Data in US Dollars.
Oil & Gas Operational
 Key Operating Data
  Key Operating Ratios
     Exploration Drillling Success Rate - World (%) Data Growth
  2006 2007 2007
       Anadarko Petroleum Corp. 87% 70%   -20%  
       Apache Corporation 64% 41%   -35%  
       Apco Oil and Gas International Inc 25% 68%   +172%  
       Approach Resources Inc 100% -   -  
       ATP Oil & Gas Corp. 100% 80%   -20%  
       Berry Petroleum Corporation 75% 100%   +33%  
       Black Hills Corp 90% 92%   +2%  
       Brigham Exploration Company - 22%   -  
       Cabot Oil & Gas Corp. 58% 42%   -27%  
       Callon Petroleum 41% 57%   +41%  
       Carrizo Oil & Gas, Inc - 99%   -  
       Chesapeake Energy Corp. 99% 99%   +1%  
       Chevron Corporation 71% 73%   +2%  
       Chevron Corporation (Hess) 71% 73%   +2%  
       Cimarex Energy Co. 34% 74%   +116%  
       Clayton Williams Energy, Inc. - 58%   -  
       CNX Gas Corp - 100%   -  
       Comstock Resources, Inc. - 29%   -  
       Concho Resources Inc - 98%   -  
       ConocoPhillips 65% 81%   +26%  
       ConocoPhillips (Hess) 65% 81%   +26%  
       Continental Resources, Inc. - 92%   -  
       Denbury Resources Inc. 56% 65%   +16%  
       Devon Energy Corporation 89% 94%   +5%  
       Dominion Energy, Inc. 85% -   -  
       El Paso Corp 95% 95%   +0%  
       Energen Corp - 99%   -  
       Energy XXI Gulf Coast, Inc. - 44%   -  
       EOG Resources 74% 80%   +7%  
       EPL Oil & Gas Inc 76% 42%   -45%  
       EXCO Resources, Inc. - 42%   -  
       ExxonMobil 64% 54%   -15%  
       ExxonMobil (Hess) 64% 54%   -15%  
       Forest Oil Corporation 94% 91%   -3%  
       Gastar Exploration Inc. 88% 88%   -1%  
       Goodrich Petroleum Corporation - 100%   -  
       Gulfport Energy Corporation - 75%   -  
       Helix Energy Solutions Group 76% 91%   +20%  
       Hess Corporation 67% 73%   +9%  
       HighPoint Resources Corporation - 51%   -  
       Houston Exploration Company 77% -   -  
       Kodiak Oil & Gas Corp. 80% 61%   -24%  
       Marathon Oil Corp. 77% 65%   -16%  
       Mariner Energy - 55%   -  
       McMoRan Exploration Co. 67% 88%   +33%  
       MDU Resources Group 80% 44%   -44%  
       Murphy Oil Corporation 73% 33%   -54%  
       National Fuel Gas 76% 87%   +16%  
       Newfield Exploration Company 82% 54%   -34%  
       Noble Energy 40% 77%   +92%  
       Occidental Petroleum Corporation 10% 36%   +271%  
       PDC Energy, Inc. - 4%   -  
       Penn Virginia Corporation - 76%   -  
       Petrohawk Energy Corp 92% 96%   +4%  
       PetroQuest Energy, Inc - 90%   -  
       Pioneer Natural Resources Company 93% 81%   -14%  
       Plains Exploration & Production 49% 87%   +78%  
       Pogo Producing Company 66% -   -  
       Questar 15% 43%   +190%  
       Quicksilver Resources Inc 97% 88%   -9%  
       Range Resources Corporation - 64%   -  
       Rosetta Resources Inc. - 60%   -  
       SandRidge Energy, Inc. - 84%   -  
       SilverBow Resources, Inc. - 40%   -  
       SM Energy Company 84% 70%   -17%  
       Southwestern Energy Co. 95% 95%   +0%  
       Stone Energy Corporation 27% 50%   +83%  
       Ultra Petroleum Corporation 99% 100%   +1%  
       Unit Corp 52% 68%   +32%  
       Venoco 79% 83%   +5%  
       Virtual E&P Sector 82% 78%   -5%  
       W & T Offshore - 86%   -  
       Whiting Petroleum Corporation - 98%   -  
       XTO 53% 73%   +38%