Haynesville Shale Counties
Texas
- Gregg
- Harrison
- Rusk
- Panola
- Nacogdoches
- Shelby
- San Augustine
- Angelina Sabine
- Louisiana
- Caddo
- Bossier
- Webster
- Bienville
- De Soto
- Red River
- Natchitoches
- Sabine
Midland / Delaware Basin Counties
Texas
- Culberson
- Reeves
- Pecos
- Ward
- Loving
- Winkler
- Ector
- Crain
- Upton
- Regan
- Glasscock
- Midland
- Martin
- Howard
- Andrews
- Gaines
New Mexico
- Lea
- Eddy
Anadarko Basin
Oklahoma
- Dewey
- Custer
- Blaine
- Kingfisher
- Canadian
- Caddo
- Grady
- McClain
- Garvin
- Stephens
- Murray
- Carter
