In the years ending October 31, 2011, October 31, 2010, Revenues 1,241,015 657,929 Production costs 183,743 96,267 Depletion and acceleration 344,932 220,078 Accumulated depletion expense 989,713 1,200,652 Impairment 137,732 219,539 Net capitalized cost 2,074,900 2,577,519 Operating results for oil and gas producing activities.