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Supplemental information on oil and gas activities (Narrative) (Details)
12 Months Ended
Dec. 31, 2022
USD ($)
Bcf
MMBbls
Dec. 31, 2021
USD ($)
Bcf
MMBbls
Dec. 31, 2020
USD ($)
MMBbls
Bcf
Dec. 31, 2019
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Impairment loss | $ $ 0 $ 4,334,000 $ 133,864,000  
Discount rate used in current estimate of value in use 10.00% 10.00% 10.00%  
Oil And Condensates [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved developed and undeveloped reserves, revisions | MMBbls 2.3 4.0 4.5  
Naturals gas [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved developed and undeveloped reserves, revisions 0.8 0.7 2.1  
Proved Developed And Undeveloped Reserves from Impact of Higher Average Prices Revisions   4.0    
Proved Developed And Undeveloped Reserves Due to Better Performance Revisions 0.8      
Chile [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Impairment loss | $   $ 17,641,000 $ 81,967,000  
Chile [Member] | Oil And Condensates [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved developed and undeveloped reserves, revisions | MMBbls 0.1 0.3    
Proved Developed And Undeveloped Reserves From Existing Wells Revisions | MMBbls     0.1  
Proved Developed And Undeveloped Reserves from Change in Development Plan Revisions | MMBbls   0.6    
Proved Developed And Undeveloped Reserves from Impact of Higher Average Prices Revisions | MMBbls 0.3      
Proved Developed And Undeveloped Reserves Due To Lower Average Prices | MMBbls     0.3  
Chile [Member] | Naturals gas [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved Developed And Undeveloped Reserves Due to Lower Performance Revisions   2.7    
Proved Developed And Undeveloped Reserves Due to Revisions Associated With Incremental Activity   3.4    
Proved Developed And Undeveloped Reserves from Change in Development Plan Revisions   1.5    
Proved Developed And Undeveloped Reserves from Impact of Higher Average Prices Revisions 0.7      
Proved Developed And Undeveloped Reserves Due to Better Performance Revisions     7.9  
Proved Developed And Undeveloped Reserves Due To Lower Performance Than Expected Decrease     5.8  
Proved Developed And Undeveloped Reserves Due To Lower Average Prices     2.5  
Brazil [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Impairment loss | $     $ 1,717,000  
Brazil [Member] | Naturals gas [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved Developed And Undeveloped Reserves Due To Better Performance Than Expected Increase   2.5    
Proved Developed And Undeveloped Reserves from Impact of Higher Average Prices Revisions 0.8 1    
Proved Developed And Undeveloped Reserves Due to Better Performance Revisions     3.0  
Proved Developed And Undeveloped Reserves Due To Lower Performance Than Expected Decrease 1.6      
Proved Developed And Undeveloped Reserves Due To Lower Average Prices     1.2  
Colombia [Member] | Oil And Condensates [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved developed and undeveloped reserves, revisions | MMBbls 0.6 5.7 5.1  
Proved Developed And Undeveloped Reserves from Change in Development Plan Revisions | MMBbls 3.6      
Proved Developed And Undeveloped Reserves from Impact of Higher Average Prices Revisions | MMBbls 0.3      
Proved Developed And Undeveloped Reserves Due To Lower Average Prices | MMBbls     4.2  
Argentina [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Impairment loss | $   $ 13,307,000 $ 16,205,000  
Argentina [Member] | Oil And Condensates [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved developed and undeveloped reserves, revisions | MMBbls   0.1    
Proved Developed And Undeveloped Reserves From Existing Wells Revisions | MMBbls     0.5  
Proved Developed And Undeveloped Reserves Due To Lower Average Prices | MMBbls     1.1  
Argentina [Member] | Naturals gas [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved Developed And Undeveloped Reserves Due to Lower Performance Revisions   1.6    
Proved Developed And Undeveloped Reserves from Impact of Higher Average Prices Revisions   1    
Proved Developed And Undeveloped Reserves Due to Better Performance Revisions     1.9  
Proved Developed And Undeveloped Reserves Due To Lower Average Prices     1.2  
Oil and gas properties [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved Developed And Undeveloped Reserves from Change in Development Plan Revisions | MMBbls     1.6  
Oil and gas properties [Member] | Chile [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved Developed And Undeveloped Reserves From Existing Wells Revisions | MMBbls   0.3    
Oil and gas properties [Member] | Colombia [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved Developed And Undeveloped Reserves From Existing Wells Revisions | MMBbls   8.9 2.8  
Oil and gas properties [Member] | Argentina [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved Developed And Undeveloped Reserves From Existing Wells Revisions | MMBbls   0.3    
Proved Developed And Undeveloped Reserves from Change in Development Plan Revisions | MMBbls     0.2  
Llanos 34 Blocks [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves, proportional interest of net proved developed reserve 84.00% 88.00% 86.00% 97.00%
Reserves Proportional Interest Of Net Proved Undeveloped Reserve 85.00% 88.00% 91.00% 96.00%
CPO-5 Block [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves, proportional interest of net proved developed reserve 11.00% 8.00% 8.00%  
Reserves Proportional Interest Of Net Proved Undeveloped Reserve 3.00% 5.00% 4.00%  
Llanos 32 Blocks [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves, proportional interest of net proved developed reserve 1.00% 2.00% 3.00% 3.00%
Reserves Proportional Interest Of Net Proved Undeveloped Reserve 7.00% 5.00% 5.00% 4.00%
Llanos 32 Blocks [Member] | Colombia [Member] | Naturals gas [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Proved Developed And Undeveloped Reserves Due to Better Performance Revisions 0.1      
Platanillo Block [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves, proportional interest of net proved developed reserve 4.00% 2.00% 3.00%  
Reserves Proportional Interest Of Net Proved Undeveloped Reserve 5.00% 3.00%    
Fell Block [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves, proportional interest of net proved developed reserve 100.00% 100.00% 100.00% 100.00%
BCAM-40 Block [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves, proportional interest of net proved developed reserve 100.00% 100.00% 100.00% 100.00%
Aguada Baguales Block [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves, proportional interest of net proved developed reserve   45.00% 50.00% 49.00%
Reserves Proportional Interest Of Net Proved Undeveloped Reserve 100.00% 100.00% 100.00% 100.00%
Puesto Touquet Block [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves, proportional interest of net proved developed reserve   21.00% 26.00% 30.00%
El Porvenir Block [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves, proportional interest of net proved developed reserve   33.00% 24.00% 21.00%
Morona Block [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves Proportional Interest Of Net Proved Undeveloped Reserve 100.00% 100.00% 100.00% 100.00%
Perico Block [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves, proportional interest of net proved developed reserve 85.00%      
Espejo Block Account [Member]        
Disclosure Of Supplemental information on oil and gas activities [Line Items]        
Reserves, proportional interest of net proved developed reserve 15.00%