Chevron Corporation, through its subsidiaries, engages in integrated energy and chemicals operations worldwide. The company operates in two segments, Upstream and Downstream. The Upstream segment is involved in the exploration, development, production, and transportation of crude oil and natural gas; processing, liquefaction, transportation, and regasification associated with liquefied natural gas; transportation of crude oil through pipelines; and transportation, storage, and marketing of natural gas, as well as operates a gas-to-liquids plant.