3,680 wells across 460 active operators, with 0 drilling permits filed in the last 24 months.
Refreshed monthly from WOGCC well-header records. Data current as of 2026-08-23.
Quick answer: The Cretaceous-Lower Tertiary formation in Wyoming has 3,680 wells on record across 460 active operators, with 0 drilling permits filed in the last 24 months (as of 2026-08-23). Its most active operators by well count are Contango Resources Company, Aethon Energy Operating, Brown Tom, Hilcorp Energy Company and Encana Oil & Gas. Compiled from Wyoming Oil & Gas Conservation Commission (WOGCC) well-header records, refreshed monthly.
The operators with the most well counts targeting the Cretaceous-Lower Tertiary formation in Wyoming:
| # | Operator | Wells in Cretaceous-Lower Tertiary |
|---|---|---|
| 1 | Contango Resources Company | 290 |
| 2 | Aethon Energy Operating | 226 |
| 3 | Brown Tom | 223 |
| 4 | Hilcorp Energy Company | 208 |
| 5 | Encana Oil & Gas | 164 |
| 6 | Burlington Resources Oil & Gas Company | 114 |
| 7 | Bill Barrett | 100 |
| 8 | Ovintiv USA INC | 93 |
| 9 | Adamas Energy LLC | 88 |
| 10 | Citation Oil & Gas | 87 |
The Wyoming counties with the most Cretaceous-Lower Tertiary activity:
Fremont, Natrona
The Cretaceous-Lower Tertiary is one of Wyoming's active oil and gas plays, with 3,680 wells on file across 460 distinct operators of record. Operators have filed 0 drilling permits targeting the Cretaceous-Lower Tertiary 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 Fremont, Natrona, knowing whether your tract sits within an active Cretaceous-Lower Tertiary 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 Wyoming oil & gas formations & plays · Download the Wyoming formations dataset (CSV)
3,680 wells target the Cretaceous-Lower Tertiary in Wyoming, worked by 460 active operators, per WOGCC well-header records (as of 2026-08-23).
By well count, the most active Cretaceous-Lower Tertiary operators in Wyoming are Contango Resources Company, Aethon Energy Operating, Brown Tom, Hilcorp Energy Company and Encana Oil & Gas. The full ranking is in the table on this page.
Operators filed 0 drilling permits targeting the Cretaceous-Lower Tertiary in the last 24 months — a live measure of current activity, per WOGCC records.
Operators filed 0 new drilling permits targeting the Cretaceous-Lower Tertiary in Wyoming over the last 24 months. New permits and spuds are the clearest signal of active Cretaceous-Lower Tertiary drilling, per WOGCC records (as of 2026-08-23).
Cretaceous-Lower Tertiary activity in Wyoming currently spans 3,680 wells on record and 460 active operators, led by Contango Resources Company, Aethon Energy Operating, Brown Tom, Hilcorp Energy Company and Encana Oil & Gas, with 0 drilling permits filed in the last 24 months — refreshed monthly from Wyoming Oil & Gas Conservation Commission (WOGCC) well-header records (as of 2026-08-23).
The most active Cretaceous-Lower Tertiary counties in Wyoming are Fremont, Natrona.
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 Cretaceous-Lower Tertiary 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 Cretaceous-Lower Tertiary activity in your area.
Get Your Free Mineral ValuationWyoming Oil & Gas Industry Snapshot Dashboard
Top Wyoming Operators Leaderboard
Wyoming Drilling Activity Report (permits, DUCs, spuds)
US Mineral Market Activity Index (all 11 states ranked 0–100)
US Mineral & Drilling Activity Index (national rollup)
Texas Industry Snapshot (largest producing state)
Largest US Operators — National Leaderboard
Browse the Full Operator Directory
Live Oil & Gas Prices (WTI + Henry Hub)
Sell Your Wyoming Mineral Rights
Formation: Cretaceous-Lower Tertiary
State: Wyoming
Total wells: 3,680
Active operators: 460
Permits 24mo: 0
Last refresh: 2026-08-23
Free written offers on Cretaceous-Lower Tertiary mineral rights in Wyoming.
Get Your Free Offer