Dunoco
Operator of record for 18 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: DUNOCO INC · Dunoco Inc
At a glance
Dunoco is the operator of record for 18 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 17 (94%) are plugged & abandoned. Its largest concentration is in Montana, with 17 wells (94% of its portfolio).
Wells operated
18
Active
0
Plugged
17
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Montana | 17 |
| Wyoming | 1 |
Well mix
- Oil wells
- 4
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Dunoco to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Dunoco operate?
Dunoco's catalogued wells are spread across 2 states: Montana (17) and Wyoming (1). Its 17 Montana wells are 0.0% of the 42,011 catalogued in that state — its largest share of any state. Counts cover only states whose registries WellCensus has ingested with operator names; wells in Nebraska and Texas (location indexes) and in states without a registry ingest are not yet attributed to any operator.
How many of Dunoco’s wells are active, plugged or orphaned?
0% of Dunoco's catalogued wells are active, 29 percentage points below the national share of 29%. 94% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Dunoco operate?
By product class, 4 (22%) are oil wells and 0 (0%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Nprr 13-1 in Wheatland, MT at 6,390 ft. The wells listed below sit in Wheatland (MT), Yellowstone (MT), Hot Springs (WY), Big Horn (MT), Carbon (MT) and Blaine (MT) and other counties. State filings spell the name 2 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Dunoco
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Nprr 13-1 | 25-107-05081 | Plugged & abandoned | Other type | Wheatland, MT | Dunoco Inc | 6,390 ft |
| Botts Estate 1 | 25-111-05147 | Plugged & abandoned | Oil | Yellowstone, MT | Dunoco Inc | 6,260 ft |
| USA 1 | 49-017-06691 | Plugged & abandoned | Oil | Hot Springs, WY | Dunoco Inc | 5,640 ft |
| Orchowski 1 | 25-003-21005 | Plugged & abandoned | Other type | Big Horn, MT | Dunoco Inc | 5,262 ft |
| Barry 1 | 25-009-05041 | Plugged & abandoned | Other type | Carbon, MT | Dunoco Inc | 4,838 ft |
| Thurner-Flynn 1 | 25-005-21036 | Plugged & abandoned | Other type | Blaine, MT | Dunoco Inc | 4,300 ft |
| Belke 1 | 25-035-07053 | Plugged & abandoned | Other type | Glacier, MT | Dunoco Inc | 3,747 ft |
| Belke 3 | 25-035-07244 | Plugged & abandoned | Other type | Glacier, MT | Dunoco Inc | 3,693 ft |
| Belke 2 | 25-035-07243 | Plugged & abandoned | Other type | Glacier, MT | Dunoco Inc | 3,672 ft |
| Tribal 1 | 25-035-07200 | Plugged & abandoned | Other type | Glacier, MT | Dunoco Inc | 3,553 ft |
| Lozing 1 | 25-035-07020 | Plugged & abandoned | Oil | Glacier, MT | Dunoco Inc | 3,464 ft |
| Lozing Unit 1 | 25-035-07133 | Plugged & abandoned | Other type | Glacier, MT | Dunoco Inc | 3,461 ft |
Deepest first where depth is published. See all 18 wells →
Frequently asked questions
How many wells does Dunoco operate?
Dunoco is the operator of record for 18 catalogued oil & gas wells, with the largest concentration in Montana (17). Only wells in states WellCensus has ingested are counted.
How many of Dunoco's wells are still active?
0 of Dunoco's catalogued wells are active; 17 are plugged & abandoned.
In which states does Dunoco operate wells?
Dunoco is the operator of record for wells in Montana (17) and Wyoming (1).
Does Dunoco operate mostly oil or gas wells?
4 of Dunoco's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Dunoco's deepest well?
Among wells with a published depth, Nprr 13-1 in Wheatland, MT is the deepest at 6,390 ft.
Where Dunoco's wells are
About this data
Source: State oil & gas regulator registries (operator of record as filed, exact-normalized across states) plus the USGS United States Documented Orphaned Well Database (2026), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: WellCensus, “Dunoco — well portfolio”, https://wellcensus.com/operators/dunoco-31732 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).