Excello-Mulky Formation in Oklahoma: Operators, Permits & Activity 2026

Formation data coverage

Formation summary: Stored source refresh: 2026-09-16. This formation/play summary uses recorded well and operator counts and permit dates in the preceding 24 months at summary refresh. Operator counts do not verify current operations. Summary counts and the separately refreshed permit and DUC lists may have different coverage. This is a capped directory of stored records, not a complete statewide count. Permit list: Stored source refresh: 2026-08-13 through 2026-09-17. Some or all records are more than three days old and may not reflect recent filings. At most 50 displayed permit records match the formation name, ordered by permit date. This operator-linked list can differ from the summary permit count; a permit is not proof of drilling or production. This is a capped directory of stored records, not a complete statewide count. DUC list: No stored records are available in this view; this does not establish zero activity. At most 30 displayed records match the formation name, ordered by spud date. A spud date with no reported first production is a DUC proxy, not verified completion status. Elapsed days are computed at source refresh. This is a capped directory of stored records, not a complete statewide count.

Formation summary source

Stored source refresh: 2026-09-16. This formation/play summary uses recorded well and operator counts and permit dates in the preceding 24 months at summary refresh. Operator counts do not verify current operations. Summary counts and the separately refreshed permit and DUC lists may have different coverage. This is a capped directory of stored records, not a complete statewide count.

Compiled from Oklahoma Corporation Commission records through a commercial well-data aggregator. Scheduled refreshes do not guarantee that new regulator filings are available. Use the source records to check a specific well.

Permit-list source

Stored source refresh: 2026-08-13 through 2026-09-17. Some or all records are more than three days old and may not reflect recent filings. At most 50 displayed permit records match the formation name, ordered by permit date. This operator-linked list can differ from the summary permit count; a permit is not proof of drilling or production. This is a capped directory of stored records, not a complete statewide count.

DUC-list source

No stored records are available in this view; this does not establish zero activity. At most 30 displayed records match the formation name, ordered by spud date. A spud date with no reported first production is a DUC proxy, not verified completion status. Elapsed days are computed at source refresh. This is a capped directory of stored records, not a complete statewide count.

Total Wells

29,317

Recorded Operators

2,171

Total Lateral

192 miles

Permits (24mo)

Top Operators in the Excello-Mulky (Oklahoma)

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	1,772
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	357

Primary Oklahoma Counties for the Excello-Mulky

The Oklahoma counties with the most Excello-Mulky activity:

Nowata, Washington, Tulsa, Osage, Creek

Recent Excello-Mulky Drilling Permits in Oklahoma

The most recent 6 drilling permits filed for Excello-Mulky wells in Oklahoma:

Permit Date	Well	API	County	Operator	Lateral (ft)
2026-04-13	Bussman #H2	`35147282120000`	Washington	Ricks Consulting	—
2025-10-24	Doenges (Moore Ws1) 1	`35105045360000`	Nowata	Blr Energy LLC	—
2025-07-21	Letteer #4	`35143060280000`	Tulsa	Pillers Chris India	—
2025-07-08	Lucile Gilmore #Ws-1	`35105202180000`	Nowata	Waters Materials	—
2025-06-30	Johnston #15	`35143054190000`	Tulsa	Bam LLC	—
2025-03-05	Alluwee Unit #Wd #1	`35105295150000`	Nowata	T Bar M Energy Resources	—

About the Excello-Mulky Formation in Oklahoma

The Excello-Mulky is a formation/play group recorded in Oklahoma, with 29,317 wells on file across 2,171 distinct operators of record. Operators have filed 15 drilling permits targeting the Excello-Mulky in the 24-month window at summary refresh. These are stored records, not a live measure of drilling.

Recorded formation activity provides regional context. It does not establish ownership, future production, royalty payments or a value for an individual tract. Consult qualified professionals about your specific interest.

Browse listed Oklahoma oil & gas formations & plays · Download the Oklahoma formations dataset (CSV)

Frequently Asked Questions

How many wells target the Excello-Mulky formation in Oklahoma?

29,317 wells target the Excello-Mulky in Oklahoma, worked by 2,171 recorded operators, per OCC well-header records. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-08-13 through 2026-09-17. Some or all records are more than three days old and may not reflect recent filings. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

Who are the top operators in the Excello-Mulky in Oklahoma?

By well count, the operators with the most Excello-Mulky wells on record 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. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-08-13 through 2026-09-17. Some or all records are more than three days old and may not reflect recent filings. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

How active is the Excello-Mulky formation right now?

Operators filed 15 drilling permits targeting the Excello-Mulky in the 24-month window at source refresh, per OCC records. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-08-13 through 2026-09-17. Some or all records are more than three days old and may not reflect recent filings. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

Is there active drilling in the Excello-Mulky in Oklahoma?

Operators filed 15 new drilling permits targeting the Excello-Mulky in Oklahoma in the 24-month window at source refresh. New permits and spuds record reported activity stages; they do not establish ongoing drilling, per OCC records. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-08-13 through 2026-09-17. Some or all records are more than three days old and may not reflect recent filings. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

What is the current Excello-Mulky activity in Oklahoma?

Excello-Mulky activity in Oklahoma includes 29,317 wells on record and 2,171 recorded operators, led by State Fund Plugging, Gateway Resources, Endeavor Energy Resources, Rocky Roads Operating LLC and Exxon Mobil, with 15 drilling permits filed in the 24-month window at source refresh — from Oklahoma Corporation Commission (OCC) well-header records. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-08-13 through 2026-09-17. Some or all records are more than three days old and may not reflect recent filings. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

Which Oklahoma counties have the most Excello-Mulky activity?

The primary counties recorded for Excello-Mulky in Oklahoma are Nowata, Washington, Tulsa, Osage, Creek. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-08-13 through 2026-09-17. Some or all records are more than three days old and may not reflect recent filings. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

How do I find out what my Excello-Mulky mineral rights are worth?

Value depends on your net mineral acres or royalty decimal, the operator, the remaining drilling locations, and current oil and gas prices. This page is informational only, not a valuation. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-08-13 through 2026-09-17. Some or all records are more than three days old and may not reflect recent filings. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.