The Granite Wash play is located in the Anadarko Basin and is spread across several counties in the Texas and Oklahoma Panhandle areas.
The Granite Wash and other wash plays are not shale formations but are tight sand gas reservoirs that also need to be drilled horizontally and completed with hydraulic fracturing to maximize reserves and production. The Granite Wash has upper, middle and lower zones that produce from various formations with the nomenclature A through F.
Wells in the Granite Wash produce large amounts of condensate and natural gas liquids along with the natural gas. Areas of development in Texas include Wheeler, Hemphill, and Roberts Counties.
The various washes are composed of different materials as well
Morrowan Washes - chert.
Atokan washes - chert to carbonate,
Lower and Middle Cherokee washes - carbonate.
Red Fork washes - carbonate washes with granitic material.