Imperial Oil Limited explores for, produces, and sells crude oil and natural gas in Canada. It operates through three segments: Upstream, Downstream, and Chemical. The Upstream segment explores for and produces crude oil, natural gas, synthetic oil, and bitumen. As of December 31, 2019, this segment had 397 million oil-equivalent barrels of proved undeveloped reserves. The Downstream segment is involved in the transportation and refining of crude oil, as well as blending, distribution, and marketing of refined products. It also transports crude oil to refineries by contracted pipelines, common carrier pipelines, and rail; maintains a distribution system to move petroleum products to market by pipeline, tanker, rail, and road transport; and owns and operates fuel terminals, natural gas liquids, and products pipelines in Alberta, Manitoba, and Ontario. In addition, this segment markets and supplies petroleum products to motoring public through approximately 2,300 Esso and Mobil-branded s