29,313 wells across 2,167 active operators, with 1 drilling permits filed in the last 24 months.
Refreshed monthly from OCC well-header records. Data current as of 2026-08-02.
Quick answer: The Excello-Mulky formation in Oklahoma has 29,313 wells on record across 2,167 active operators, with 1 drilling permits filed in the last 24 months (as of 2026-08-02). Its most active operators by well count are State Fund Plugging, Gateway Resources, Endeavor Energy Resources, Rocky Roads Operating LLC and Exxon Mobil. Compiled from Oklahoma Corporation Commission (OCC) well-header records, refreshed monthly.
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 | 1,773 |
| 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 | 356 |
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 29,313 wells on file across 2,167 distinct operators of record. Operators have filed 1 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.
See all Oklahoma oil & gas formations & plays · Download the Oklahoma formations dataset (CSV)
29,313 wells target the Excello-Mulky in Oklahoma, worked by 2,167 active operators, per OCC well-header records (as of 2026-08-02).
By well count, the most active Excello-Mulky operators in Oklahoma are State Fund Plugging, Gateway Resources, Endeavor Energy Resources, Rocky Roads Operating LLC and Exxon Mobil. The full ranking is in the table on this page.
Operators filed 1 drilling permits targeting the Excello-Mulky in the last 24 months — a live measure of current activity, per OCC records.
Operators filed 1 new drilling permits targeting the Excello-Mulky in Oklahoma over the last 24 months. New permits and spuds are the clearest signal of active Excello-Mulky drilling, per OCC records (as of 2026-08-02).
Excello-Mulky activity in Oklahoma currently spans 29,313 wells on record and 2,167 active operators, led by State Fund Plugging, Gateway Resources, Endeavor Energy Resources, Rocky Roads Operating LLC and Exxon Mobil, with 1 drilling permits filed in the last 24 months — refreshed monthly from Oklahoma Corporation Commission (OCC) well-header records (as of 2026-08-02).
The most active Excello-Mulky counties in Oklahoma are Nowata, Washington, Tulsa, Osage, Creek.
Value depends on your net mineral acres or royalty decimal, the operator, the remaining drilling locations, and current oil and gas prices. Buckhead Energy checks your tract against current Excello-Mulky well and permit data and puts a free, no-obligation written offer in writing — this page is informational only, not a valuation.
Cite this dataset
Permanently archived and citable via a DOI on Zenodo (CERN), under a CC BY 4.0 license. DOI: 10.5281/zenodo.21442884 · View on Zenodo
License & attribution: This data is licensed CC BY 4.0. You are free to share and adapt it, including commercially, provided you credit “Buckhead Energy” and link back to this page or the DOI above.
Get a free written offer based on your specific tract, operator, and the current Excello-Mulky activity in your area.
Get Your Free Mineral ValuationOklahoma Oil & Gas Industry Snapshot Dashboard
Top Oklahoma Operators Leaderboard
Top Producing Wells in Oklahoma
Recent Drilling Permits in Oklahoma
Recently Spudded Wells in Oklahoma (90 days)
Newly Producing Wells in Oklahoma (6 months)
Oklahoma DUC Inventory (Drilled, Uncompleted)
Oklahoma County Drilling Activity Rankings
Texas Industry Snapshot (sibling state)
Largest US Operators — National Leaderboard
Browse the Full Operator Directory
Live Oil & Gas Prices (WTI + Henry Hub)
Sell Your Oklahoma Mineral Rights
Cherokee Platform (Oklahoma) Guide
Formation: Excello-Mulky
State: Oklahoma
Total wells: 29,313
Active operators: 2,167
Permits 24mo: 1
Last refresh: 2026-08-02