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Inventories
12 Months Ended
Dec. 31, 2017
Classes of current inventories [abstract]  
Disclosure of inventories [text block]
Note 23
Inventories
 
Amounts in US$ '000
 
2017
 
2016
 
Crude oil
 
 
1,969
 
 
1,521
 
Materials and spares
 
 
3,769
 
 
1,994
 
 
 
 
5,738
 
 
3,515