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Property, plant and equipment (Tables)
 6 Months Ended
Jun. 30, 2023
Notes and other explanatory information [abstract]  
Schedule of property plant and equipment by class of assets
           
 

Land, buildings

and

improvement

 Equipment and other assets (1)

Assets under

construction (2)

 Exploration and development costs (3) Right-of-use assets Total
Balance at December 31, 2022 2,538 55,147 14,838 38,434 19,212 130,169
Cost 4,343 105,429 23,938 67,581 29,670 230,961
Accumulated depreciation and impairment (4) (1,805) (50,282) (9,100) (29,147) (10,458) (100,792)
Additions − 229 4,653 2 7,304 12,188
Decommissioning costs - Additions to / review of estimates − − − 6 − 6
Capitalized borrowing costs − − 583 − − 583
Signature Bonuses Transfers (5) − − − 6 − 6
Write-offs − (181) (17) (35) (151) (384)
Transfers (6) 44 1,232 (1,344) 848 1 781
Transfers to assets held for sale (16) (52) (7) (25) − (100)
Depreciation, amortization and depletion (42) (2,372) − (2,207) (2,524) (7,145)
Impairment recognition − (180) (266) (1) − (447)
Impairment reversal 1 14 − − 28 43
Translation adjustment 210 4,474 1,453 3,068 1,727 10,932
Balance at June 30, 2023 2,735 58,311 19,893 40,096 25,597 146,632
Cost 4,696 115,136 29,432 73,661 38,756 261,681
Accumulated depreciation and impairment (4) (1,961) (56,825) (9,539) (33,565) (13,159) (115,049)

 

 

Balance at December 31, 2021 2,383 53,126 16,922 35,847 17,052 125,330
Cost 4,080 98,085 25,954 61,906 26,382 216,407
Accumulated depreciation and impairment (4) (1,697) (44,959) (9,032) (26,059) (9,330) (91,077)
Additions − 442 3,209 9 3,255 6,915
Decommissioning costs - Additions to / review of estimates − − − 11 − 11
Capitalized borrowing costs − − 530 − − 530
Signature Bonuses Transfers (5) − − − 840 − 840
Write-offs               − (723) (963) (614) (1,389) (3,689)
Transfers (6) 65 1,706 (4,095) 2,411 − 87
Transfers to assets held for sale (13) (1,857) (343) (1,248) (8) (3,469)
Depreciation, amortization and depletion (44) (2,369) − (2,680) (2,268) (7,361)
Impairment recognition − (48) (18) (42) − (108)
Impairment reversal − 12 2 11 − 25
Translation adjustment 152 3,661 1,062 2,369 1,064 8,308
Balance at June 30, 2022 2,543 53,950 16,306 36,914 17,706 127,419
Cost 4,308 102,174 25,582 64,420 27,971 224,455
Accumulated depreciation and impairment (4) (1,765) (48,224) (9,276) (27,506) (10,265) (97,036)

 

 

(1) It is composed of production platforms, refineries, thermoelectric power plants, natural gas processing plants, pipelines, and other operating, storage and production plants, including subsea equipment for the production and flow of oil and gas, depreciated based on the units of production method.
(2) See note 8 for assets under construction by operating segment.
(3) It is composed of exploration and production assets related to wells, abandonment and dismantling of areas, signature bonuses associated with proved reserves and other costs directly associated with the exploration and production of oil and gas (oil and gas production properties).
(4) In the case of land and assets under construction, it refers only to impairment losses.
(5) Transfers from intangible assets.  In 2023, it refers to the declaration of commerciality of the Manjuba field. In 2022, it relates to Sépia and Atapu.
(6) It includes mainly transfers between classes of assets and transfers from advances to suppliers.
Schedule of useful life of assets
 
Asset Weighted average useful life in years
Buildings and improvement 40  (between 25 and 50)
Equipment and other assets 20 (3 to 31) - except assets by the units of production method
Exploration and development costs Units of production method
Right-of-use 8 (between 2 and 47)

 
Schedule of asset and readjustment on accumulated depreciation and impairment
       
  Platforms Vessels Properties Total
Balance at June 30, 2023 14,878 8,659 2,060 25,597
Cost 19,334 16,713 2,709 38,756
Accumulated depreciation and impairment (4,456) (8,054) (649) (13,159)
Balance at December 31, 2022 9,211 8,254 1,747 19,212
Cost 12,604 14,788 2,278 29,670
Accumulated depreciation and impairment (3,393) (6,534) (531) (10,458)

 
Schedule of reimbursements payable
           
          Jan-Jun/2023 Jan-Jun/2022
Opening balance         407 364
Additions/(Write-offs) on PP&E         5 (37)
Other income and expenses         23 12
Translation adjustments         35 22
Closing balance         470 361