Issues in focus
| Basin/Play | Area (square miles) | Average well spacing (wells per square mile) | Percent of area untested | Percent of area with potential | Average EUR (billion cubic feet per well) | Number of potential wells | TRR (billion cubic feet) |
|---|---|---|---|---|---|---|---|
| Appalachian | |||||||
| Marcellus | 104,067 | 5 | 99 | 18 | 1.56 | 90,216 | 140,565 |
| Utica | 16,590 | 4 | 100 | 21 | 1.13 | 13,936 | 15,712 |
| Arkoma | |||||||
| Woodford | 3,000 | 8 | 98 | 23 | 1.97 | 5,428 | 10,678 |
| Fayetteville | 5,853 | 8 | 93 | 23 | 1.30 | 10,181 | 13,240 |
| Chattanooga | 696 | 8 | 100 | 29 | 0.99 | 1,633 | 1,617 |
| Caney | 2,890 | 4 | 100 | 29 | 0.34 | 3,369 | 1,135 |
| TX-LA-MS Salt | |||||||
| Haynesville/Bossier | 9,320 | 8 | 98 | 34 | 2.67 | 24,627 | 65,860 |
| Western Gulf | |||||||
| Eagle Ford | 7,600 | 6 | 99 | 47 | 2.36 | 21,285 | 50,219 |
| Pearsall | 1,420 | 6 | 100 | 85 | 1.22 | 7,242 | 8,817 |
| Anadarko | |||||||
| Woodford | 3,350 | 4 | 99 | 29 | 2.89 | 3,796 | 10,981 |
| Total, selected shale gas plays | 181,714 | 318,825 | |||||
| Total, all U.S. shale gas plays | 410,722 | 481,783 | |||||