Article Photos: Back to the Future: Chaparral hopes to recover 77 million barrels of oil from one of Oklahoma's oldest oil fields 1/10

Chaparral Energy CEO Mark Fischer holds photos of Phillips Petroleum executives starting secondary waterflooding operations in Osage County in 1950 and Chaparral executives starting carbon dioxide tertiary operations on teh same field earlier this month. <strong>photo by Adam Wilmoth</strong>