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Mercer County, PA oil and gas wells
4,790 wells: 3,167 active, 441 plugged, 162 orphaned, run by 153 operators.
Figures from the Pennsylvania Department of Environmental Protection, updated 2026-10-19.
Top operators in Mercer
| Operator | Active | Wells here |
|---|---|---|
| DIVERSIFIED PROD LLC | 1,065 | 1,151 |
| DIAMOND ENERGY PARTNERS LLC | 565 | 569 |
| OWS ACQUISITION CO LLC | 393 | 395 |
| JMG ENERGY LLC | 177 | 178 |
| OWS ENERGY LLC | 145 | 145 |
| ALLEN ENERGY LLC | 122 | 122 |
| COBRA RESOURCES LLC | 107 | 124 |
| LEGACY OGC LLC | 92 | 92 |
| DJR WELL SERVICES INC | 91 | 94 |
| NATL FUEL GAS SUPPLY CORP | 64 | 83 |
| DVY ENERGY LLC | 55 | 55 |
| WES OIL & GAS LLC | 52 | 52 |
| HILCORP ENERGY CO | 48 | 70 |
| BOCOR HOLDINGS LLC | 39 | 44 |
| PIN OAK ENERGY PARTNERS LLC | 37 | 38 |
| MCCOMB OIL INC | 22 | 25 |
| EVERFLOW EASTERN INC | 19 | 25 |
| MILLENNIUM OIL & GAS INC | 15 | 17 |
| ENERGY EXPLORATION & DEV LTD | 11 | 12 |
| PM BORTZ & ASSOC | 2 | 3 |
| ALLEN DANIEL W | 2 | 2 |
| GERALD MCDOWELL | 2 | 2 |
| HULSE RONALD D | 2 | 2 |
| ROLLINS LESTER G | 2 | 2 |
| WINNER JAMES JR | 2 | 2 |
Wells
Not plugged · All wells · Plugged · Orphaned