Covering 2,500 square miles & 6 Texas counties, the Spraberry Formation is one of the largest in the nation for total proved reserves. It was once dubbed the “Largest Uneconomic Oil Producing Play in the World.” The trend is made up of mostly “Spraberry Sand”, a sand that makes oil recovery difficult. The rock in this area is naturally fractured. Even with many technological advances, the Spraberry retains about 90% of the reserves originally figured. Today, the Spraberry has produced more than a billion barrels of oil.

Location: Texas (Andrews, Borden, Crane, Crockett, Dawson, Ector, Gaines, Garza, Glasscock, Howard, Irion, Lynn, Martin, Mitchell, Midland, Reagan, Sterling, Terry, Tom Green and Upton counties)

Depth: 5,100-8,300 feet