Mid-Continent

Arkoma-Woodford

Arkoma Woodford Counties: OK: Atoka, Coal, Hughes, McIntosh, Pittsburg

Cana-Woodford

Cana Woodford Counties: OK: Blaine, Caddo, Canadian, Custer, Dewey, Garvin, Grady, Kingfisher, McClain, Stephens

Fayetteville Shale

Fayetteville Counties: AR: Cleburne, Conway, Jackson, Johnson, Faulkner, Franklin, Independence, Pope, Van Buren, White

Granite Wash

Granite Wash Counties: OK: Beckham, Custer, Roger Mills, Washita
TX: Hemphill, Roberts, Wheeler

Mississippian Lime

Mississippian Lime Counties: KS: Barber, Butler, Chase, Chautagua, Clark, Coffey, Comanche, Cowley, Dickinson, Edwards, Elk, Finney, Ford, Gove, Grant, Gray, Greenwood, Harper, Harvey, Haskell, Hodgeman, Kearny, Kingman, Kiowa, Lane, Logan, Lyon, Marion, McPherson, Meade, Montgomery, Morris, Ness, Pawnee, Pratt, Reno, Rice, Rush, Saline, Scott, Sedgwick, Seward, Sheridan, Sherman, Stafford, Stevens, Sumner, Thomas, Trego, Wallace, Wichita, Wilson, Woodson
OK: Alfalfa, Blaine, Creek, Garfield, Grant, Harper, Kay, Kingfisher, Lincoln, Logan, Major, Noble, Osage, Pawnee, Payne, Tulsa, Washington, Woods, Woodward