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Suspended Wells (Tables) | 12 Months Ended
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Dec. 31, 2019
Suspended Wells [Abstract] |
Net changes in suspended exploratory well costs | Note 8—Suspended Wells and Other Exploration Expenses The following table reflects the net changes in suspended exploratory well costs during 2019, 2018 and 2017: Millions of Dollars 2019 2018 2017 Beginning balance at January 1 $ 856 853 1,063 Additions pending the determination of proved reserves 239 140 118 Reclassifications to proved properties (11) (37) (66) Sales of suspended wells (54) (93) - Charged to dry hole expense (10) (7) (262) Ending balance at December 31 $ 1,020 * 856 853 *Includes $ 313 million of assets held for sale in Australia.
Aging of suspended well cost | The following table provides an aging of suspended well balances at December 31: Millions of Dollars 2019 2018 2017 Exploratory well costs capitalized for a period of one year or less $ 206 145 67 Exploratory well costs capitalized for a period greater than one year 814 711 786 Ending balance $ 1,020 * 856 853 Number of projects with exploratory well costs capitalized for a period greater than one year 23 24 23 *Includes $ 313 million of assets held for sale in Australia.
Aging of Exploratory Well Cost that have been capitalized for more than one year | The following table provides a further aging of those exploratory well costs that have been capitalized for more than one year since the completion of drilling as of December 31, 2019: Millions of Dollars Suspended Since Total 2016–2018 2013–2015 2004–2012 Greater Poseidon—Australia (2)(3) 177 - 157 20 NPRA—Alaska (1) 149 111 38 - Barossa/Caldita—Australia (2)(3) 136 59 - 77 Surmont—Canada (1) 118 6 55 57 Middle Magdalena Basin—Colombia (1) 68 - 68 - Narwhal Trend—Alaska (1) 52 52 - - Kamunsu East—Malaysia (2) 19 - 19 - NC 98—Libya (2) 15 - 11 4 WL4-00—Malaysia (2) 17 17 - - Other of $10 million or less each (1)(2) 63 20 26 17 Total $ 814 265 374 175 (1)Additional appraisal wells planned. (2)Appraisal drilling complete; costs being incurred to assess development. (3)Assets held for sale as of December 31, 2019.

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- Definition Tabular disclosure of the change in capitalized exploratory costs during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
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- Definition Tabular disclosure of the amount of exploratory well costs that have been capitalized after the completion of drilling and the number of projects for which those costs relate. Additionally, for exploratory well costs that have been capitalized for periods greater than one year at the most recent balance sheet date, this block of text may be used to disclose an aging of those amounts by year, or by using a range of years, and the number of projects to which those costs relate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
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- Definition Tabular disclosure of exploratory well costs that continue to be capitalized for more than one year after the completion of drilling. Information may include a description of the projects and the activities that the enterprise has undertaken to date in order to evaluate the reserves and the projects, and the remaining activities required to classify the associated reserves as proved. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph b -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
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