Emerald Oil, Inc. (Emerald) is an independent oil and natural gas exploration and production company. It focuses on developing oil wells in the Williston Basin of North Dakota and Montana primarily targeting the Bakken and three forks shale oil formations. It controls approximately 35,000 net acres in the Williston Basin. In addition to its Williston Basin position, Emerald holds positions in the Rocky Mountain oil and natural gas plays. It has approximately 14,500 net acres in the Sand Wash Basin in northwest Colorado prospective for oil in the Niobrara formation. It has approximately 33,500 net acres in central Montana prospective for oil in the Heath formation. The Company also has approximately 72,800 net acres in the Tiger Ridge Field located in Blaine, Hill, and Chouteau Counties, Montana, prospective for natural gas, and another approximate 1,700 net acres in the Denver-Julesburg (DJ) Basin in Weld County, Colorado prospective for oil in the Niobrara formation.