Exploratory Well Costs (Tables)

3 Months Ended

Mar. 31, 2013

Exploratory Well Costs [Abstract]

Net Changes In Capitalized Exploratory Well Costs

EOG's net changes in capitalized exploratory well costs for the three-month period ended March 31, 2013 are presented below (in thousands):

	Three Months Ended
	March 31, 2013
Balance at December 31, 2012	$	49,116
Additions Pending the Determination of Proved Reserves		51,797
Reclassifications to Proved Properties		-
Costs Charged to Expense (1)		(1,616	)
Foreign Currency Translations		(1,546	)
Balance at March 31, 2013	$	97,751

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

Aging of Capitalized Exploratory Well Costs

The following table provides an aging of capitalized exploratory well costs at March 31, 2013 (in thousands, except well count):

	At
	March 31,
	2013
Capitalized exploratory well costs that have been capitalized for a period less than one year	$	70,633
Capitalized exploratory well costs that have been capitalized for a period greater than one year		27,118	(1)
Total	$	97,751
Number of exploratory wells that have been capitalized for a period greater than one year		2

(1) Consists of costs related to an outside operated, offshore Central North Sea natural gas project in the United Kingdom ($19 million) and costs associated with evaluation of a project in Central Alberta, Canada ($8 million).  In the Central North Sea Columbus project, the operator and partners are currently re-evaluating export route options as a result of an announced change in plans by the export infrastructure owners.  In the Central Alberta project, EOG is currently evaluating alternatives for the well and surrounding acreage.