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Inventories (Tables)
12 Months Ended
Dec. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of Inventory Inventories consisted of the following at December 31, 2022 and 2021:
December 31,
(Thousands of dollars)
20222021
Unsold crude oil$6,546 $15,497 
Materials and supplies47,967 38,701 
Inventories$54,513 $54,198