Canadian Natural Resources Limited is a Calgary, Canada based company that deals with acquisition, exploration, development, production, marketing, and sales of crude oil and natural gas. The company offers various types of crude oil, including synthetic crude oil, bitumen, heavy crude oil, and natural gas liquids. They operate mainly in Western Canada, the United Kingdom portion of the North Sea, and offshore Africa, with total proved reserves of crude oil, bitumen, and NGLs being 10,528 million barrels.