2,243 wells across 347 recorded operators, with 52 drilling permits filed in the 24-month window at summary refresh.
Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-01.
Quick answer: The Greater Green River Basin formation in Wyoming has 2,243 wells on record across 347 recorded operators, with 52 drilling permits filed in the 24-month window at source refresh. Its operators with the most wells on record are Urban Oil & Gas Group, EOG Resources, Hilcorp Energy Company, Chevron and Bcemach. Source: Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-01.
The operators with the most well counts targeting the Greater Green River Basin formation in Wyoming:
| # | Operator | Wells in Greater Green River Basin |
|---|---|---|
| 1 | Urban Oil & Gas Group | 212 |
| 2 | Eog Resources | 175 |
| 3 | Hilcorp Energy Company | 163 |
| 4 | Chevron | 116 |
| 5 | Bcemach | 103 |
| 6 | Atlantic Richfield Company | 91 |
| 7 | Wexpro Company | 82 |
| 8 | Amplify Energy Operating | 78 |
| 9 | Bpx Operating Company | 51 |
| 10 | Purewest Resources INC | 50 |
The Wyoming counties with the most Greater Green River Basin activity:
Sweetwater, Sublette, Lincoln, Carbon, Fremont
The Greater Green River Basin is not among the Wyoming formations tracked separately in the yearly permit mix, so only statewide permit counts are shown.
| Year | State permits | This formation | Share | Median lateral |
|---|---|---|---|---|
| 2026 | 616 | — | — | — |
| 2025 | 566 | — | — | — |
| 2024 | 459 | — | — | — |
| 2023 | 581 | — | — | — |
| 2022 | 696 | — | — | — |
| 2021 | 505 | — | — | — |
| 2020 | 456 | — | — | — |
| 2019 | 1,197 | — | — | — |
Share of each year’s Wyoming drilling permits by target formation, for the formations with the most permits.
| Year | Niobrara- Mowry | Powder River Basin | Mesaverde-Lance | Muddy J Sand | Green River Basin | Mesaverde-Lance-Lewis |
|---|---|---|---|---|---|---|
| 2026 | 2.8% | 70% | — | — | 16.4% | — |
| 2025 | 6.5% | 59.4% | 0.9% | — | 19.8% | — |
| 2024 | 17.2% | 52.5% | 1.1% | — | 9.2% | 1.7% |
| 2023 | 15% | 42.3% | 1% | 7.6% | 13.3% | 0.7% |
| 2022 | 33.9% | 26.4% | 6.8% | 10.8% | 4.3% | 2.3% |
| 2021 | 59.4% | 4.6% | 17.8% | 13.9% | — | 2.6% |
| 2020 | 69.7% | 5% | 2.6% | 15.1% | — | 3.1% |
| 2019 | 56% | 6.5% | 17.3% | 9.4% | — | 6.7% |
Buckhead Energy computes every figure on this page from grouped records in public oil and gas data. The page shows counts, sums, percentiles and indexes only; it does not list individual wells, leases or permits.
Counts under 3 wells and percentiles under 5 wells are withheld; totals are floors.
Share is the formation’s permits as a percent of the state’s permits that year. Median lateral length is published only when at least 5 permits stand behind it.
Last computed: 2026-11-01. These figures are informational only and are not a valuation of any mineral or royalty interest.
The Greater Green River Basin is a formation/play group recorded in Wyoming, with 2,243 wells on file across 347 distinct operators of record. Operators have filed 52 drilling permits targeting the Greater Green River Basin 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.
2,243 wells target the Greater Green River Basin in Wyoming, worked by 347 recorded operators, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-01.
The Greater Green River Basin operators with the most wells on record in Wyoming are Urban Oil & Gas Group, EOG Resources, Hilcorp Energy Company, Chevron and Bcemach. The full ranking is in the table on this page. Formation summary date: 2026-11-01.
Operators filed 52 drilling permits targeting the Greater Green River Basin in the 24-month window at source refresh, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-01.
Operators filed 52 new drilling permits targeting the Greater Green River Basin in Wyoming in the 24-month window at source refresh. New permits and spuds record reported activity stages; they do not establish ongoing drilling, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-01.
Greater Green River Basin activity in Wyoming includes 2,243 wells on record and 347 recorded operators, with 52 drilling permits filed in the 24-month window at source refresh — from Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-01.
The primary counties recorded for Greater Green River Basin in Wyoming are Sweetwater, Sublette, Lincoln, Carbon, Fremont. Formation summary date: 2026-11-01.
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. Formation summary date: 2026-11-01.
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Get Your Free Written OfferFormation: Greater Green River Basin
State: Wyoming
Total wells: 2,243
Recorded operators: 347
Permits 24mo: 52
Summary date: 2026-11-01
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