The Denver-Julesburg (DJ) Basin of Colorado and Wyoming is anchored by the Niobrara and Codell formations across Weld County and the greater Front Range.
The Denver-Julesburg (DJ) Basin has approximately 100,480 wells operated by 2,837 companies. Below are the largest operators by well count. Data as of 2026-08-03.
| # | Operator | Wells | Producing |
|---|---|---|---|
| 1 | Noble Energy | 10,379 | 8,303 |
| 2 | Kerrmcgee | 9,780 | 8,817 |
| 3 | Pdc Energy | 8,350 | 6,737 |
| 4 | Own Resources Operating | 3,440 | 3,390 |
| 5 | Crestone Peak Resources Operating | 2,416 | 2,182 |
| 6 | Anadarko Petroleum | 2,294 | 95 |
| 7 | Extraction Oil & Gas | 1,636 | 1,303 |
| 8 | K P Kauffman Company | 1,458 | 1,316 |
| 9 | Bison Iv Operating LLC | 1,340 | 757 |
| 10 | Eog Resources | 1,325 | 303 |
| 11 | Bonanza Creek Energy Operating Company | 1,168 | 922 |
| 12 | Gungnir Operating LLC | 1,100 | 0 |
| 13 | Highpoint Operating | 977 | 516 |
| 14 | Currently Unassigned | 910 | 9 |
| 15 | Wave Petroleum Operating | 792 | 1 |
| 16 | Verdad Resources | 777 | 521 |
| 17 | North Silo Resources LLC | 723 | 52 |
| 18 | Prairie Operating CO LLC | 697 | 480 |
| 19 | Longs Peak Resources | 636 | 9 |
| 20 | Fundare Resources Operating Company LLC | 623 | 400 |
| 21 | Dunamis Energy Operating LLC | 559 | 426 |
| 22 | British American Oil Production Company | 534 | 73 |
| 23 | Petroleum | 528 | 39 |
| 24 | Omimex Petroleum | 489 | 354 |
| 25 | Shell Oil Company | 484 | 34 |
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Well counts compiled by Buckhead Energy from state oil & gas regulator records (data as of 2026-08-03); reflect wells where each company is the current operator of record in the Denver-Julesburg (DJ) Basin. Informational only.
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