Marathon Oil (MRO)

Oil and Natural Gas Production

        The following tables set forth daily average net production of liquid hydrocarbons and natural gas for each of the last three years:

Net Liquid Hydrocarbons Production^(a)(b)

Net Natural Gas Production^(b)(g)

^(a)

Includes crude oil, condensate and natural gas liquids.

^(b)

Amounts represent production after royalties, excluding the U.K., Ireland and the Netherlands where amounts shown are before royalties.

^(c)

Amounts represent production from leasehold ownership, after royalties and interests of others.

^(d)

Amounts represent equity tanker liftings and direct deliveries of liquid hydrocarbons. The amounts correspond with the basis for fiscal settlements with governments. Crude oil purchases, if any, from host governments are excluded.

^(e)

Represents Marathon's equity interests in Chernogorskoye, MKM and CLAM.

^(f)

Amounts represent Marathon's western Canadian operations, which were sold in 2003.

^(g)

Amounts exclude volumes purchased from third parties for injection and subsequent resale of 19 mmcfd in 2004, 23 mmcfd in 2003 and 4 mmcfd in 2002.

^(h)

Represents Marathon's equity interests in CLAM.

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