Sweetgrass County has 81 wells in the MBOGC well file — 0 of them producing today (0 oil, 0 gas), 0 permitted, 0 spudded but not yet completed, and 73 plugged and abandoned. The most active operator by well count is Grant Oil Co.. Figures come from the 2026-09-29 MBOGC bulk file; production runs through 2026-08.
| Operator | Wells |
|---|---|
| Grant Oil Co. | 9 |
| West Gas INC | 7 |
| Quicksilver Resources, INC. | 5 |
| Montana Power Company | 4 |
| Montana Energy Company, LLC | 4 |
| Sun Exploration And Production Co | 3 |
| Amerada Hess Corporation | 2 |
| Stanolind Oil & Gas Co. | 2 |
| Soc Development | 2 |
| Mountain States Resources INC | 2 |
| Field | Wells |
|---|---|
| Wildcat Sweet Grass | 11 |
| Sixshooter Dome | 6 |
| Reed Point | 1 |