Impairment of Non-financial Assets
The Group reviews the carrying amounts of its non-financial assets at each reporting date to determine whether there is any indication of impairment. If any such indication exists, an asset’s recoverable amount is estimated.
The recoverable amount is the higher of an asset’s fair value less costs of disposal and value in use. Where an individual asset does not generate separately identifiable cash flows, an impairment test is performed at the cash-generating unit (“CGU”) level. A CGU is the smallest identifiable group of assets that generates cash inflows that are largely independent of the cash inflows from other assets or groups of assets. Where the carrying amount of an asset (or CGU) exceeds its recoverable amount, the asset (or CGU) is considered impaired and written down to its recoverable amount. In assessing value in use, the estimated future cash flows are discounted to their present value using a discount rate that reflects current market assessments of the time value of money and the risks specific to the asset. In determining fair value less costs of disposal, an appropriate valuation model is used. These calculations are corroborated by external valuation metrics or other available fair value indicators wherever possible.
An assessment is made at the end of each reporting period whether there is an indication that previously recognized impairment losses no longer exist or have decreased. If such indication exists, an estimate of the assets (or CGU’s) recoverable amount is reviewed. A previously recognized impairment loss is reversed to the extent that the events or circumstances that triggered the original impairment have changed. The reversal is limited so that the carrying amount of the asset does not exceed its recoverable amount, nor exceed the carrying amount that would have been determined, net of depreciation, depletion and amortization, had no impairment loss been recognized for the asset in prior periods. A reversal of an impairment loss for a CGU is allocated to the assets of the CGU pro-rata with the carrying amounts of those assets.
Hydrocarbon probable reserves are tested for impairment when they are reclassified to hydrocarbon development and production assets or when indicators exist that suggest the carrying amount may exceed the recoverable amount. For purposes of impairment testing, hydrocarbon probable reserves are grouped with related producing resource properties as a CGU with common geography and geological characteristics.
Unproved lands are evaluated for indicators separately from hydrocarbon development and production assets and hydrocarbon probable reserves. Impairment is assessed by comparing the carrying amount of unproved lands to values determined by an independent land evaluator based on recent market transactions. Management also takes into account future plans for those properties, the remaining terms of the leases and any other factors that may be indicators of potential impairment.
