Boulder County has 783 wells in the ECMC well file — 102 of them producing today (21 oil, 81 gas), 0 permitted, 0 spudded but not yet completed, and 400 plugged and abandoned. The most active operator by well count is Extraction Oil & Gas INC. Figures come from the 2026-09-29 ECMC bulk file; production runs through 2026-08.
| Operator | Wells |
|---|---|
| Extraction Oil & Gas INC | 157 |
| Crestone Peak Resources Operating LLC | 126 |
| Gerrity Oil & Gas Corp | 91 |
| Encana Oil & Gas (Usa) INC | 47 |
| Old Operators - Status Unknown | 44 |
| Unknown | 44 |
| Basin Exploration INC | 19 |
| Martin Exploration Management Co | 19 |
| Noble Energy INC | 18 |
| Meyer Oil Company | 17 |
| Field | Wells |
|---|---|
| Wattenberg | 506 |
| Boulder | 96 |
| Wildcat | 88 |
| Holland | 31 |
| Boulder Valley | 25 |
| Superior | 16 |
| Highland | 5 |
| Holland West | 5 |