Quarterly report pursuant to Section 13 or 15(d)

Capitalization of Exploratory Well Costs (Details)

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Capitalization of Exploratory Well Costs (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2012
m
Track
Etame Marin [Member]
 
Capitalization of Exploratory Well Costs (Textual) [Abstract]  
Number of side tracks 2
Area of sand of oil 5
North Tchibala [Member]
 
Capitalization of Exploratory Well Costs (Textual) [Abstract]  
Capitalization on development plan 8.1
East Poplar Dome [Member]
 
Capitalization of Exploratory Well Costs (Textual) [Abstract]  
Capitalization on development plan 6.0
Total cost 8.9