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ASSET RETIREMENT OBLIGATIONS
12 Months Ended
Sep. 30, 2011
ASSET RETIREMENT OBLIGATIONS
11. 
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 September 30, 2011, the Company estimates the undiscounted cash flows related to asset retirement obligation to total approximately $644,226 (September 30, 2010 - $531,055). The fair value of the liability at September 30, 2011 is estimated to be $397,891 (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:

   
September 30,
2011
   
September 30,
2010
 
Balance, beginning of year
  $ 386,934     $ 358,235  
Liabilities incurred
           
Effect of foreign exchange
    (5,490 )     14,749  
Disposal
    (6,839 )      
Accretion expense
    12,763       13,950  
Balance, end of year
  $ 387,368     $ 386,934