Suspended Wells and Exploration Expenses (Tables) |
12 Months Ended |
|---|---|
Dec. 31, 2021 | |
| Suspended Wells and Exploration Expenses [Abstract] | |
| Net Changes in Suspended Exploratory Well Costs | The following table reflects the net Millions of Dollars 2021 2020 2019 Beginning balance at January 1 $ 682 1,020 856 Additions pending the determination of proved 10 164 239 Reclassifications to proved - (42) (11) Sales of suspended wells - (313) (54) Charged to dry hole expense (32) (147) (10) Ending balance at December 31 $ 660 682 1,020 * *Includes $ 313 For additional details on suspended wells charged to dry hole expense, see the Exploration Expenses section |
| Aging of Suspended Well Cost | The following table provides an aging Millions of Dollars 2021 2020 2019 Exploratory well costs capitalized $ 4 156 206 Exploratory well costs capitalized 656 526 814 Ending balance $ 660 682 1,020 * *Includes $ 313 Number of projects with exploratory greater than one year 22 22 23 |
| Aging of Exploratory Well Cost, Capitalized for More than One Year | The following table provides a further than one year since the completion of drilling as of December 31, 2021: Millions of Dollars Suspended Since Total 2018-2020 2015-2017 2004-2014 Willow—Alaska (1) 313 262 51 - Surmont—Canada (1) 121 2 19 100 PL 1009—Norway (1) 43 43 - - PL 891—Norway (1) 34 34 - - Narwhal Trend—Alaska (1) 25 25 - - WL4-00—Malaysia (1) 24 24 - - PL782S—Norway (1) 22 22 - - NC 98—Libya (2) 13 - - 13 Other of $10 million or less each (1)(2) 61 21 11 29 Total $ 656 433 81 142 (1)Additional appraisal wells planned. (2)Appraisal drilling complete; costs being incurred to assess development. |