Issues in focus
| Well spacing | |||||||
|---|---|---|---|---|---|---|---|
| Estimate | Area (square miles) | Acres | Wells per square mile | Percent of area untested | Percent of area with potential | Average EUR (billion cubic feet per well) | TRR (billion cubic feet) |
| AEO2011 (as of 1/1/2009) | |||||||
| Marcellus | 94,893 | 80 | 8 | 99% | 34% | 1.62 | 410,374 |
| USGS (2011 assessment) | |||||||
| Marcellus | 104,067 | 132 | 4.9 | 99% | 18% | 0.93 | 84,198 |
| Foldbelt | 19,063 | 149 | 4.3 | 100% | 5% | 0.21 | 765 |
| Interior | 45,156 | 149 | 4.3 | 99% | 37% | 1.15 | 81,374 |
| Western | 39,844 | 117 | 5.5 | 99% | 7% | 0.13 | 2,059 |
| AEO2012 (as of 1/1/2010) | |||||||
| Marcellus | 104,067 | 132 | 4.9 | 99% | 18% | 1.56 | 140,541 |
| Foldbelt | 19,063 | 149 | 4.3 | 100% | 5% | 0.21 | 757 |
| Interior | 45,161 | 149 | 4.3 | 99% | 37% | 1.95 | 137,677 |
| Western | 39,844 | 117 | 5.5 | 100% | 7% | 0.13 | 2,107 |