4,208 wells across 125 active operators, with 0 drilling permits filed in the last 24 months.
Refreshed monthly from ECMC well-header records. Data current as of 2026-08-23.
Quick answer: The Pierre -Niobrara formation in Colorado has 4,208 wells on record across 125 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 Evergreen Natural Resources LLC, Ogris Operating LLC, Pioneer Natural Resources, High River Resources Operating LLC and Evergreen Operating. Compiled from Colorado Energy & Carbon Management Commission (ECMC) well-header records, refreshed monthly.
The operators with the most well counts targeting the Pierre -Niobrara formation in Colorado:
| # | Operator | Wells in Pierre -Niobrara |
|---|---|---|
| 1 | Evergreen Natural Resources LLC | 2,504 |
| 2 | Ogris Operating LLC | 536 |
| 3 | Pioneer Natural Resources | 233 |
| 4 | High River Resources Operating LLC | 149 |
| 5 | Evergreen Operating | 107 |
| 6 | Petroglyph Operating Company | 80 |
| 7 | Tep Rocky Mountain | 65 |
| 8 | Xto Energy | 56 |
| 9 | Red River Ranch Holdings | 51 |
| 10 | Cedar Ridge | 44 |
The Colorado counties with the most Pierre -Niobrara activity:
Las Animas, Huerfano
The Pierre -Niobrara is one of Colorado's active oil and gas plays, with 4,208 wells on file across 125 distinct operators of record. Operators have filed 0 drilling permits targeting the Pierre -Niobrara 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 Las Animas, Huerfano, knowing whether your tract sits within an active Pierre -Niobrara 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 Colorado oil & gas formations & plays · Download the Colorado formations dataset (CSV)
4,208 wells target the Pierre -Niobrara in Colorado, worked by 125 active operators, per ECMC well-header records (as of 2026-08-23).
By well count, the most active Pierre -Niobrara operators in Colorado are Evergreen Natural Resources LLC, Ogris Operating LLC, Pioneer Natural Resources, High River Resources Operating LLC and Evergreen Operating. The full ranking is in the table on this page.
Operators filed 0 drilling permits targeting the Pierre -Niobrara in the last 24 months — a live measure of current activity, per ECMC records.
Operators filed 0 new drilling permits targeting the Pierre -Niobrara in Colorado over the last 24 months. New permits and spuds are the clearest signal of active Pierre -Niobrara drilling, per ECMC records (as of 2026-08-23).
Pierre -Niobrara activity in Colorado currently spans 4,208 wells on record and 125 active operators, led by Evergreen Natural Resources LLC, Ogris Operating LLC, Pioneer Natural Resources, High River Resources Operating LLC and Evergreen Operating, with 0 drilling permits filed in the last 24 months — refreshed monthly from Colorado Energy & Carbon Management Commission (ECMC) well-header records (as of 2026-08-23).
The most active Pierre -Niobrara counties in Colorado are Las Animas, Huerfano.
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 Pierre -Niobrara 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.
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Formation: Pierre -Niobrara
State: Colorado
Total wells: 4,208
Active operators: 125
Permits 24mo: 0
Last refresh: 2026-08-23
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