29,305 wells across 2,168 active operators, with 2 drilling permits filed in the last 24 months.
Refreshed monthly from OK OCC well-header records. Data current as of 2026-05-04.
The operators with the most well counts targeting the Excello-Mulky formation in Oklahoma:
| # | Operator | Wells in Excello-Mulky |
|---|---|---|
| 1 | State Fund Plugging | 2,055 |
| 2 | Gateway Resources | 1,802 |
| 3 | Endeavor Energy Resources | 859 |
| 4 | Rocky Roads Operating LLC | 576 |
| 5 | Exxon Mobil | 569 |
| 6 | Comdisco Resources | 496 |
| 7 | Performance Operating | 416 |
| 8 | Bratco Operating Company | 390 |
| 9 | Bullseye Operating | 387 |
| 10 | Entransco Energy | 362 |
The Oklahoma counties with the most Excello-Mulky activity:
Nowata, Washington, Tulsa, Osage, Creek
The Excello-Mulky is one of Oklahoma's active oil and gas plays, with 29,305 wells on file across 2,168 distinct operators of record. Operators have filed 2 drilling permits targeting the Excello-Mulky in the last 24 months — a measure of how active the play is right now versus its historical baseline.
For mineral owners with interests in Nowata, Washington, Tulsa, Osage, Creek, knowing whether your tract sits within an active Excello-Mulky footprint is a foundational valuation question. Active formations with consistent permit flow command premium pricing; legacy formations with steady but declining production are valued differently.
Get a free written offer based on your specific tract, operator, and the current Excello-Mulky activity in your area.
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Formation: Excello-Mulky
State: Oklahoma
Total wells: 29,305
Active operators: 2,168
Permits 24mo: 2
Last refresh: 2026-05-04