Big Four Oil
Operator of record for 10 catalogued wells across 3 states. Every well below links to its full registry page.
Filed as: BIG FOUR OIL CO · Big Four Oil Co
At a glance
Big Four Oil is the operator of record for 10 catalogued U.S. oil & gas wells in 3 states. 3 (30%) are active, 7 (70%) plugged & abandoned. Its largest concentration is in Wyoming, with 4 wells (40% of its portfolio).
Wells operated
10
Active
3
Plugged
7
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Wyoming | 4 |
| Montana | 3 |
| Pennsylvania | 3 |
Well mix
- Oil wells
- 7
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 30%
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Claim Big Four Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Big Four Oil operate?
Big Four Oil's catalogued wells are spread across 3 states: Wyoming (4), Montana (3) and Pennsylvania (3). Its 3 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 Big Four Oil’s wells are active, plugged or orphaned?
30% of Big Four Oil's catalogued wells are active, close to the national share of 29%. 70% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Big Four Oil operate?
By product class, 7 (70%) 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 Federal 1 in Mccone, MT at 5,800 ft. The wells listed below sit in Mccone (MT), Musselshell (MT), Fremont (WY) and Warren (PA). 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 Big Four Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Federal 1 | 25-055-21078 | Plugged & abandoned | Other type | Mccone, MT | Big Four Oil Co | 5,800 ft |
| Federal 1 | 25-055-21099 | Plugged & abandoned | Other type | Mccone, MT | Big Four Oil Co | 5,721 ft |
| 1 | 25-065-05367 | Plugged & abandoned | Other type | Musselshell, MT | Big Four Oil Co | 1,400 ft |
| Enos 7 | 49-013-06212 | Plugged & abandoned | Oil | Fremont, WY | Big Four Oil Co | 1,202 ft |
| Enos D 5 | 49-013-06217 | Plugged & abandoned | Oil | Fremont, WY | Big Four Oil Co | 885 ft |
| Enos 6 | 49-013-06221 | Plugged & abandoned | Oil | Fremont, WY | Big Four Oil Co | 884 ft |
| Enos 5 | 49-013-06224 | Plugged & abandoned | Oil | Fremont, WY | Big Four Oil Co | 826 ft |
| Jennings 1 | 37-123-20047 | Active | Oil | Warren, PA | Big Four Oil Co | — |
| Jennings 3 | 37-123-20049 | Active | Oil | Warren, PA | Big Four Oil Co | — |
| Jennings 2 | 37-123-20048 | Active | Oil | Warren, PA | Big Four Oil Co | — |
Deepest first where depth is published. See all 10 wells →
Frequently asked questions
How many wells does Big Four Oil operate?
Big Four Oil is the operator of record for 10 catalogued oil & gas wells, with the largest concentration in Wyoming (4). Only wells in states WellCensus has ingested are counted.
How many of Big Four Oil's wells are still active?
3 of Big Four Oil's catalogued wells are active; 7 are plugged & abandoned.
In which states does Big Four Oil operate wells?
Big Four Oil is the operator of record for wells in Wyoming (4), Montana (3) and Pennsylvania (3).
Does Big Four Oil operate mostly oil or gas wells?
7 of Big Four Oil's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Big Four Oil's deepest well?
Among wells with a published depth, Federal 1 in Mccone, MT is the deepest at 5,800 ft.
Where Big Four Oil'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, “Big Four Oil — well portfolio”, https://wellcensus.com/operators/big-four-oil-39023 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).