Wyoming

Marathon has more than 90 years of experience in exploration and development in Wyoming. The Company continues to be a leading performer in enhancing the recovery of oil from fractured carbonate and sandstone reservoirs in the mature Bighorn Basin and Wind River Basin fields, with an active infill drilling program.

The Spring Creek Field in the Bighorn Basin was acquired by Marathon in 2000. Subsequent reservoir management and an infill drilling program raised net production from 800 barrels of oil per day in 2001 to more than 3.5 thousand barrels per day currently.

Marathon has conventional gas operations in Southwest Wyoming, with primary focus in the Wamsutter Field.

The Company holds more than 350,000 net acres in Wyoming's coalbed natural gas resources in the Powder River Basin, most of which the Company operates. Development continues in the Fairway and Sheridan areas, with more than 200 wells planned for 2007. Coalbed natural gas is an important, clean energy resource that provides a cost-effective and abundant domestic source of energy to fuel America’s growth, improve our daily lives and power our homes and businesses.

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Powder River Basin Fact Sheet (PDF 228KB)