EOG Resources' geographic focus is determined by where it can locate primary energy resources -- natural gas, natural gas liquids, and oil. In recent years that focus has been on exploiting shale plays in the US. The independent oil and gas company is engaged in exploring for natural gas and crude oil and developing, producing, and marketing those resources. In 2015, EOG's total estimated net proved reserves was 2.1 billion barrels of oil equivalent, of which nearly 1.1 billion barrels was crude oil and condensate reserves, and 3.8 trillion cubic feet was natural gas reserves.