Canadian Natural Resources Ltd. is a senior independent crude oil and natural gas exploration, development and production company. The company's exploration and production operations are focused in North America, largely in Western Canada; the United Kingdom portion of the North Sea; and Côte d'Ivoire, Gabon, and South Africa in Offshore Africa. The Horizon Oil Sands Mining and Upgrading segment produces synthetic crude oil through bitumen mining and upgrading operations. The company within Western Canada maintains certain midstream activities that include pipeline operations and an electricity cogeneration system. Canadian Natural Resources was founded on November 7, 1973 and is headquartered in Calgary, Canada.