Accounting for Suspended Exploratory Wells (Tables)

12 Months Ended

Dec. 31, 2022

Accounting for Suspended Exploratory Wells [Abstract]

Changes in company's suspended exploratory well costs

The following table indicates the changes to the company’s suspended exploratory well costs for the three years ended December 31, 2022:


	2022		2021		2020
Beginning balance at January 1	$	2,109	$	2,512	$	3,041
Additions to capitalized exploratory well costs pending the determination of proved reserves	72		56		28
Reclassifications to wells, facilities and equipment based on the determination of proved reserves	(481)		(425)		(102)
Capitalized exploratory well costs charged to expense	(73)		(34)		(667)
Other*	—		—		212
Ending balance at December 31	$	1,627	$	2,109	$	2,512

* 2020 represents fair value of well costs acquired in the Noble acquisition.

Aging of capitalized well costs and number of project

The following table provides an aging of capitalized well costs and the number of projects for which exploratory well costs have been capitalized for a period greater than one year since the completion of drilling.


	At December 31
	2022		2021		2020
Exploratory well costs capitalized for a period of one year or less	$	73	$	65	$	26
Exploratory well costs capitalized for a period greater than one year	1,554		2,044		2,486
Balance at December 31	$	1,627	$	2,109	$	2,512
Number of projects with exploratory well costs that have been capitalized for a period greater than one year*	12		15		17

*Certain projects have multiple wells or fields or both.

Aging of Costs on Well and Project Basis

The $1,554 of suspended well costs capitalized for a period greater than one year as of December 31, 2022, represents 71 exploratory wells in 12 projects. The tables below contain the aging of these costs on a well and project basis:


Aging based on drilling completion date of individual wells:	Amount		Number of wells
2000-2009	$	263	14
2010-2014	1,121		49
2015-2021	170		8
Total	$	1,554	71

Aging based on drilling completion date of last suspended well in project:	Amount		Number of projects
2008-2013	$	428	5
2014-2018	1,083		6
2019-2022	43		1
Total	$	1,554	12