Woodford Shale

The Devonian and Mississippian Woodford Shale were deposited over a large portion of the Midcontinent. In the Anadarko Basin, the Woodford Shale is a dark-gray to black shale and is considered an important source rock.

The Devonian Woodford Shale in Oklahoma is from 50 to 300 feet (91 m) thick and found at depths from 7,500 to 8,500 feet. Although the first gas production was recorded in 1939, by late 2004, there were only 24 Woodford Shale gas wells. By early 2008, there were more than 750 Woodford gas wells. Like many shale gas plays, the Woodford started with vertical wells, then became dominantly a play of horizontal wells. The play is mostly in the Arkoma Basin of southeast Oklahoma, but some drilling has extended the play west into the Anadarko Basin and south into the Ardmore Basin.

Oklahoma counties that are seeing Woodford shale exploration.

Atoka, Bryan, Canadian, Carter, Coal, Garvin, Hughes, Johnston, Marshall, Mayes, McIntosh, Pittsburg, and Wagoner.

Companies in the Woodford Shale.

Antero Resources, Chesapeake Energy, Cimarex Energy, Continental Resources, Devon Energy, Newfield Exploration, Petroquest Energy, Range Resources, St. Mary Land and Exploration, XTO Energy