The Stanine system of the Cogat scores on the other hand, is similar to a Grade Point Average, being assigned on a nine-point scale. Stanine range from 1 to 3 indicates a below average score, 4 to 6 represents an average performance and 7 to 9 signifies good results.
US oil and gas reserves study | 11. Production costs US â production costs ($ per boe) (a) 2009 2010 2011 2012 2013 3-year 5-year $ 11.06 $ 12.12 $ 14.44 $ 14.74 $ 14.84 $ 14.68 $ 13.55 (a) Includes the 50 largest companies based on 2013 end-of-year oil and gas reserve estimates.
Current and historical drilling costs of oil, gas, and geothermal wells are evaluated. Despite the differences in lithology and well design, their average costs are similar. A new cost index for 1976â2009 US onshore oil and gas wells was developed. Oil and gas well cost increased by over 250% between 2003 and 2008.