Exploratory Well Costs (Tables)

6 Months Ended

Jun. 30, 2021

Capitalized Exploratory Well Costs [Abstract]

Net Changes In Capitalized Exploratory Well Costs

EOG's net changes in capitalized exploratory well costs for the six-month period ended June 30, 2021, are presented below (in millions):

	Six Months Ended June 30, 2021
Balance at January 1	$	29
Additions Pending the Determination of Proved Reserves	14
Reclassifications to Proved Properties	(3)
Costs Charged to Expense (1)	(12)
Balance at June 30	$	28

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

Schedule of Aging of Capitalized Exploratory Well Costs

	Six Months Ended June 30, 2021
Capitalized exploratory well costs that have been capitalized for a period of one year or less	$	13
Capitalized exploratory well costs that have been capitalized for a period greater than one year (1)	15
Balance at June 30	$	28
Number of exploratory wells that have been capitalized for a period greater than one year	1

(1)Consists of costs related to a project in Trinidad at June 30, 2021.