XML 45 R23.htm IDEA: XBRL DOCUMENT v3.10.0.1
Exploratory Well Costs (Notes)
 12 Months Ended
Dec. 31, 2018
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, 2018, 2017 and 2016 are presented below (in thousands):
 
2018
 
2017
 
2016
 
 
 
 
 
 
Balance at January 1
$
2,167

 
$
—

 
$
8,955

Additions Pending the Determination of Proved Reserves
10,304

 
27,487

 
6,688

Reclassifications to Proved Properties
(7,917
)
 
(20,802
)
 
(5,274
)
Costs Charged to Expense (1)
(433
)
 
(4,518
)
 
(10,369
)
Balance at December 31
$
4,121

 
$
2,167

 
$
—

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

At December 31, 2018, 2017 and 2016, all exploratory well costs had been capitalized for periods of less than one year.