Company: PBR
Filing Date: 2025-02-27
Form Type: 6-K
Source: 0001292814-25-000664
Chunk: 10

Company: PETROBRAS - PETROLEO BRASILEIRO SA
Filing Date: 2025-02-27
Form: 6-K
Chunk 10
---
 well as the results of biofuels auctions and raw materials supply;

v) CGU Quixadá: comprises the assets of
biofuel plant located in the city of Quixadá, state of Ceará;

vii) Other G&LCE CGUs: operations abroad defined
as the smallest group of assets that generates largely independent cash flows.

Further information on impairment testing is set
out in note 25.

| 4.3. | Sources of estimation uncertainty                   
 related to depreciation, depletion and amortization |

As presented in note 23, assets directly related
to the oil and gas production are depleted using the units of production method, calculated by monthly production over the respective
developed proved reserves, except for the signature bonuses, which are calculated over total proved reserves.

Proved developed reserves are those for which recovery
can be expected: (i) through existing wells, equipment and operating methods, or in which the cost of the required equipment is relatively
minor compared to the cost of a new well; and (ii) through extraction equipment and operational infrastructure installed at the time of
the reserves estimate, if the extraction is carried out by means that do not involve a well.

Estimates of proved reserves volumes used in the
units of production method are prepared by Company’s technicians according to the SEC definitions (as described in note 4.1). Revisions
to the Company’s proved developed and undeveloped reserves impact prospectively the amounts of depreciation, depletion and amortization
recognized in the statement of income and the carrying amounts of oil and gas properties assets. Information on uncertainties related
to reserve volume estimates are presented in note 4.1.

Therefore, assuming all other variables remain
constant, a decrease in estimated proved reserves would increase, prospectively, depreciation, depletion and amortization expense, while
an increase in reserves would reduce depreciation, depletion and amortization.

| 4.4. | Sources of estimation uncertainty                          
 related to pension plan and other post-employment benefits |

The net actuarial liability represents the Company's
actuarial obligations, net of fair value of plan assets (when applicable), at present value, as described in note 18.3.2.

The actuarial obligations and net expenses related
to defined benefit pension and health care post-employment plans are computed based on several financial and demographic assumptions,
of which the most significant are:

a) Discount rate: comprises the projected future
inflation in addition to an equivalent discounted interest rate that