Article Photos: Back to the Future: Chaparral hopes to recover 77 million barrels of oil from one of Oklahoma's oldest oil fields 10/10

Frank Phillips and other Phillips Petroleum executives mark the beginning of waterflooding operations in the North Burbank Field in Osage County in 1950. Oklahoma City-based Chaparral Energy this month began operations on the third beginning for the historic field. <strong> - provided</strong>