PBR » Topics » Unproved Oil and Gas Properties - (US$ millions)

This excerpt taken from the PBR 6-K filed May 27, 2005.

Unproved Oil and Gas Properties – (US$ millions)

 

     2004

    2003

    2002

 

Beginning balance at January 1

   1,903     875     712  

Additions

   736     862     607  

Sales of reserves

   —       —       —    

Acquisition of reserves

   —       267     —    

Write offs

   (490 )   (220 )   (203 )

Transfers to proved reserves

   (551 )   (37 )   (52 )

Cumulative Translation Adjustment

   86     156     (189 )
    

 

 

Ending balance at December 31

   1,684     1,903     875  


The following table provides an aging of capitalized exploratory well costs based on the date the drilling was completed and the number of projects for which exploratory well costs have been capitalized for a period greater than one year since the completion of the drilling:

 

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