Mclean County has 232 wells in the NDIC well file — 43 of them producing today (43 oil, 0 gas), 26 permitted, 0 spudded but not yet completed, and 103 plugged and abandoned. The most active operator by well count is Spotted Hawk Development, LLC. Figures come from the 2026-09-29 NDIC bulk file; production runs through 2026-07.
| Operator | Wells |
|---|---|
| Spotted Hawk Development, LLC | 48 |
| Oasis Petroleum North America LLC | 28 |
| Whiting Oil And Gas Corporation | 25 |
| Marathon Oil Company | 20 |
| Mitchell Energy Corp. | 10 |
| Duncan Energy Co. | 8 |
| W. H. Hunt Trust Estate | 6 |
| Presidio Exploration, INC. | 6 |
| Equitable Resources Energy Co. | 6 |
| Devon Energy Williston, L.l.c. | 5 |
| Field | Wells |
|---|---|
| Deep Water Creek Bay | 77 |
| Wildcat | 72 |
| Lucky Mound | 35 |
| Van Hook | 27 |
| Centennial | 12 |
| Raub | 4 |
| Bears Tail | 3 |
| Underwood Carbon Dioxide | 2 |