Niobrara County has 2,348 wells in the WOGCC well file — 280 of them producing today (270 oil, 10 gas), 82 permitted and waiting on a rig, 16 spudded but not yet completed, and 1,732 plugged and abandoned. The most active operator by well count is Marathon Oil Company. Figures below come from the 2026-09-02 WOGCC bulk file; production runs through 2026-07.
9 wells went to a rig in Niobrara County in the last twelve months per WOGCC's daily spud report (updated 2026-09-01); 3 of them in the last 45 days. The statewide list is on the drilling activity page.
| Spud date | Operator | Well | Location | Rig |
|---|---|---|---|---|
| 2026-08-11 | Hadley/Jackson Energy LLC | Argo No. B-17 | NW SW Sec 19 T39N R60W | TNT Drilling |
| 2026-08-04 | 1876 Resources LLC | SIDNEY No. 22 NXH | NW NE Sec 22 T35N R67W | Wyoming Casing |
| 2026-08-04 | 1876 Resources LLC | SIDNEY No. 23 NXH | NW NE Sec 22 T35N R67W | Wyoming Casing |
| Operator | Wells |
|---|---|
| Marathon Oil Company | 174 |
| Conoco INC | 102 |
| Sunshine Valley Petroleum | 83 |
| Arena Resources LLC | 71 |
| Jp Oil Wyoming LLC | 62 |
| Coronado Oil Company | 57 |
| Buck Creek Oil Company | 42 |
| Finley Resources INC | 40 |
| Breitburn Operating L.p. | 37 |
| Usa Energy LLC | 36 |
| Operator | bbl |
|---|---|
| 1876 Resources LLC | 967,990 |
| Arena Resources LLC | 211,626 |
| M & K Oil Company LLC | 50,462 |
| Jp Oil Wyoming LLC | 42,437 |
| Breitburn Operating L.p. | 40,767 |
| Operator | mcf |
|---|---|
| 1876 Resources LLC | 1,707,414 |
| Arena Resources LLC | 239,894 |
| M & K Oil Company LLC | 161,563 |
| Jp Oil Wyoming LLC | 128,852 |
| Century Oil And Gas LLC | 104,960 |
| Field | Wells |
|---|---|
| Wc | 808 |
| Lance Creek | 463 |
| Mule Creek | 169 |
| Lightning Creek | 119 |
| Boggy Creek | 64 |
| Buck Creek | 56 |
| Mule Creek West | 55 |
| Greasewood | 52 |
| 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|
| 2 | 2 | 8 | 6 | 11 | 6 |
Across every well with a production record, Niobrara County has produced 40,146,260 bbl of oil and 52,196,681 mcf of gas; 185 wells reported volumes in the last twelve months.
Start with your legal description (section, township and range) from a deed, a division order or an old check stub, then check the Niobrara County Clerk's recorded documents for the mineral deed or reservation. Our guide walks through it step by step, and the map shows every well and spacing unit on that section so you can see whether anything is producing on your acreage.
By wells on file, Marathon Oil Company, Conoco INC, Sunshine Valley Petroleum. Operator rankings by current production are in the tables above and change month to month as new wells come on.
From the Wyoming Oil and Gas Conservation Commission's public well and production files (2026-09-02 bulk file, daily spud report 2026-09-01). Oilstats.us organises the public record; it is a research tool, not a title opinion.