With independent auditor’s report

Depreciation, depletion and amortization
Property, plant and equipment related to oil and gas properties are depleted using a unit-of-production method.
Depletion of oil and gas assets is computed on a field-by-field basis over proved developed reserves or over
total proved reserves, as appropriate. Shared oil and gas properties and equipment (e.g. gathering and initial
processing systems, etc.) are depleted over total proved reserves.
Other property, plant and equipment are depreciated using the straight-line method over their estimated useful
lives from the time they are ready for use.

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JSC “Uzbekneftegaz”
Consolidated financial statements
NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS (continued)
17
3. 
Significant accounting policies (continued)
Depreciation, depletion and amortization (continued)
Components of other property, plant and equipment and their respective estimated useful lives are as follows:
Property, plant and equipment
Useful life
Buildings and structures
30-45 years
Refinery assets
5-30 years
Machinery and equipment
5-20 years
Vehicles and other property, plant and equipment
3-10 years
The expected useful lives of property, plant and equipment are reviewed on an annual basis and, if necessary,
changes in useful lives are accounted for prospectively.
The residual value of an asset is the estimated amount that the Group would currently obtain from disposal of
the asset less the estimated costs of disposal, if the asset were already of the age and in the condition expected
at the end of its useful life. The residual value of an asset is nil if the Group expects to use the asset until the
end of its physical life unless scrap value is significant. The assets’ residual values are reviewed, and adjusted
if appropriate, at each reporting date.