Oil and Gas Reserve Estimation and Disclosures (unaudited)

Capitalized costs represent the sum of capitalized oil and gas assets, including other intangible assets and property, plant and equipment such as land, plant and machinery, concessions, licenses and rights.

Costs incurred include all costs, capitalized or expensed, during the year in the Group’s oil and gas property acquisition, exploration and development activities.

The following tables represent only those revenues and expenses which occur directly in connection with OMV´s oil and gas producing operations. The results of oil and gas activities should not be equated to Exploration & Production net income since interest costs, general corporate overhead costs, other costs and gas supply, marketing, trading and logistics in Western Europe are not allocated. Further information on OMV’s operating segments is included in Note 4 – Segment Reporting. Income taxes are hypothetically calculated, based on the statutory tax rates and the effect of tax credits on investments and loss carryforwards.

Proved reserves are those quantities of oil and gas, which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and government regulation before the time at which contracts providing the right to operate expire, unless evidence indicates that renewal is reasonably certain. Proved oil and gas reserves were estimated based on a 12-month average price, unless prices are defined by contractual arrangements.

Proved developed reserves are those proved reserves that can be expected to be recovered through existing wells with existing equipment and operating methods, or in which the costs of the required equipment are relatively minor compared with the cost of a new well and through installed extraction equipment and infrastructure operational at the time of the reserves estimate. It should be reasonably certain that the required future expenditure will be made to safeguard existing equipment within the current budget.

Proved undeveloped reserves are those proved reserves that are expected to be recovered from new wells on undrilled acreage, or from existing wells where a relatively major expenditure is required for recompletion or substantial new investment is required in order to safeguard or replace ageing facilities.

The future net cash flow information is based on the assumption that the prevailing economic and operating conditions will persist throughout the time during which proved reserves will be produced. Neither the effects of future pricing changes nor expected changes in technology and operating practices are considered.

Future cash inflows represent the revenues received from production volumes, including cushion gas held in storage reservoirs, assuming that the future production is sold at prices used in estimating year-end quantities of proved reserves (12 months average price). Future production costs include the estimated expenditures for production of the proved reserves plus any production taxes without consideration of future inflation. Future decommissioning costs comprise the net costs associated with decommissioning wells and facilities. Future development costs include the estimated costs of development drilling and installation of production facilities. For all three categories year-end costs without consideration of inflation are assumed. Future income tax payments are calculated on the basis of the income tax rate applicable in each of the countries in which the Group operates. The present cash value results from the discounting of the future net cash flow at a discount rate of 10% per year. The standardized measure does not purport to be an estimate of the fair value of the Group’s proven reserves. An estimate of fair value would also take into account, amongst many other factors, the expected recovery of reserves in excess of proved reserves, anticipated changes in future prices and costs as well as a discount factor representative of the risks inherent in the production of oil and gas.