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Asset Retirement Obligations
9 Months Ended
Jun. 30, 2011
Asset Retirement Obligations
9. 
Asset Retirement Obligations

The total future asset retirement obligation is estimated by management based on the Company’s net working interests in all wells and facilities, estimated costs to reclaim and abandon wells and facilities and the estimated timing of the costs to be incurred in future periods. At June 30, 2011, the Company estimates the undiscounted cash flows related to asset retirement obligation to total approximately $694,019 (September 30, 2010 - $531,055). The fair value of the liability at June 30, 2011 is estimated to be $424,781 (September 30, 2010 - $386,934) using a risk free rate of 3.74% and an inflation rate of 2%. The actual costs to settle the obligation are expected to occur in approximately 35 years.

Changes to the asset retirement obligation were as follows:

   
June 30, 2011
   
September 30, 2010
 
             
Balance, beginning of year
  $ 386,934     $ 358,235  
Liabilities incurred
           
Effect of foreign exchange
    26,257       14,749  
Accretion expense
    11,590       13,950  
Balance, end of year
  $ 424,781     $ 386,934