WILLISTON BASIN CORE AREA
Cornerstone is actively produces oil & gas from multiple resrvoirs in Burke County, North Dakota. Located within the Williston Basin, Cornerstone's current
activity targets the Midale (Madison) Bakken & Three Forks reservoirs.
The U.S. Geological Survey (USGS) has estimated the mean undiscovered recoverable oil potential in the Bakken Formation of North Dakota and Montana at 3.65
billion barrels of oil. Operators in the Williston Basin have recently estimated recoverable reserves to be in excess of 20.0 billion barrels of oil.