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Suspended Exploratory Well Costs
3 Months Ended
Mar. 31, 2019
Capitalized Exploratory Well Costs [Abstract]  
Suspended Exploratory Well Costs
5. Suspended Exploratory Well Costs


The Company’s suspended exploratory well costs were $460 million at March 31, 2019, and $444 million at December 31, 2018. For exploratory wells, drilling costs are capitalized, or “suspended,” on the balance sheet when the well has found a sufficient quantity of reserves to justify its completion as a producing well and sufficient progress is being made in assessing the reserves and the economic and operating viability of the project. If additional information becomes available that raises substantial doubt as to the economic or operational viability of any of these projects, the associated costs will be expensed at that time. During the three months ended March 31, 2019, there was no exploration expense recorded for suspended exploratory well costs previously capitalized for greater than one year at December 31, 2018.