XML 43 R23.htm IDEA: XBRL DOCUMENT v3.3.1.900
Exploratory Well Costs
 12 Months Ended
Dec. 31, 2015
Capitalized Exploratory Well Costs [Abstract]  
Exploratory Well Costs
Exploratory Well Costs

EOG's net changes in capitalized exploratory well costs for the years ended December 31, 2015, 2014 and 2013 are presented below (in thousands):
 
2015
 
2014
 
2013
 
 
 
 
 
 
Balance at January 1
$
17,253

 
$
9,211

 
$
49,116

Additions Pending the Determination of Proved Reserves
24,640

 
32,080

 
52,099

Reclassifications to Proved Properties
(26,659
)
 
(15,946
)
 
(54,505
)
Costs Charged to Expense (1)
(6,279
)
 
(8,092
)
 
(35,859
)
Foreign Currency Translations
—

 
—

 
(1,640
)
Balance at December 31
$
8,955

 
$
17,253

 
$
9,211

 
(1)
Includes capitalized exploratory well costs charged to either dry hole costs or impairments.

At December 31, 2015, 2014 and 2013, all exploratory well costs had been capitalized for periods of less than one year.