Article Photos: Back to the Future: Chaparral hopes to recover 77 million barrels of oil from one of Oklahoma's oldest oil fields 7/10

Tanks and equipment at Chaparral Energy's North Burbank field in Osage County separate oil, water and carbon dioxide from produced wells. The oil is then sold, while the water and carbon dioxide are reinjected into the rock formations to further stimulate production. <strong>photo by Adam Wilmoth</strong>