Petroleum
Operator of record for 885 catalogued wells across 11 states. Every well below links to its full registry page.
Filed as: PETROLEUM CO · PETROLEUM CO, INC · PETROLEUM CO. · PETROLEUM COMPANY · …
At a glance
Petroleum is the operator of record for 885 catalogued U.S. oil & gas wells in 11 states. 25 (3%) are active, 816 (92%) plugged & abandoned and 1 flagged as orphaned. Its largest concentration is in Kansas, with 269 wells (30% of its portfolio).
Wells operated
885
Active
25
Plugged
816
Orphaned
1
Portfolio by state
| State | Wells |
|---|---|
| Kansas | 269 |
| Colorado | 234 |
| Wyoming | 173 |
| Kentucky | 60 |
| North Dakota | 53 |
| Oklahoma | 50 |
| Montana | 33 |
| Utah | 6 |
| Illinois | 3 |
| Mississippi | 3 |
| Louisiana | 1 |
Well mix
- Oil wells
- 369
- Gas wells
- 35
- Shut-in
- 1
- Active share
- 3%
Is this your company?
Claim Petroleum to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Petroleum operate?
Petroleum's catalogued wells are spread across 11 states: Kansas (269), Colorado (234), Wyoming (173), Kentucky (60) and North Dakota (53) and 6 more. Its 234 Colorado wells are 0.2% of the 124,327 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 Petroleum’s wells are active, plugged or orphaned?
3% of Petroleum's catalogued wells are active, 26 percentage points below the national share of 29%. 92% are plugged & abandoned, against 47% nationally. 1 wells (0.1%) are shut-in — unplugged but idle. 1 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Petroleum operate?
By product class, 369 (42%) are oil wells and 35 (4%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Thompson 1 in Mckenzie, ND at 14,102 ft. The wells listed below sit in Mckenzie (ND), Hot Springs (WY), Vermilion (LA), Fremont (WY), Sheridan (MT) and Campbell (WY) and other counties. State filings spell the name 11 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Petroleum
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Thompson 1 | 33-053-01205 | Plugged & abandoned | Oil | Mckenzie, ND | Petroleum, Inc. | 14,102 ft |
| Ensor 1 | 33-053-01292 | Plugged & abandoned | Oil | Mckenzie, ND | Petroleum, Inc. | 13,953 ft |
| Federal 14-12x | 49-017-20702 | Plugged & abandoned | Oil | Hot Springs, WY | Petroleum Inc | 12,136 ft |
| Mcilhenny 001 | 17-113-01240 | Orphaned | Other type | Vermilion, LA | Petroleum, Inc. | 12,000 ft |
| Crooks Mountain 1 | 49-013-20511 | Plugged & abandoned | Oil | Fremont, WY | Petroleum Inc | 11,680 ft |
| Glenn 1 | 25-091-21343 | Plugged & abandoned | Oil | Sheridan, MT | Petroleum, Inc. | 10,963 ft |
| Wickersham 1 | 49-005-28082 | Plugged & abandoned | Oil | Campbell, WY | Petroleum Inc | 10,600 ft |
| Masters Federal 1 | 33-007-01027 | Plugged & abandoned | Oil | Billings, ND | Petroleum, Inc. | 10,525 ft |
| Yellowhammer Kgs 1 | 49-005-24082 | Plugged & abandoned | Oil | Campbell, WY | Petroleum Inc | 10,176 ft |
| Terra 1 | 49-005-02395 | Plugged & abandoned | Oil | Campbell, WY | Petroleum Inc | 9,984 ft |
| Hilton 1 | 33-011-00222 | Plugged & abandoned | Oil | Bowman, ND | Petroleum, Inc. | 9,953 ft |
| East Little Knife State 1 | 33-025-00383 | Plugged & abandoned | Oil | Dunn, ND | Petroleum, Inc. | 9,906 ft |
Deepest first where depth is published. See all 885 wells →
Frequently asked questions
How many wells does Petroleum operate?
Petroleum is the operator of record for 885 catalogued oil & gas wells, with the largest concentration in Kansas (269). Only wells in states WellCensus has ingested are counted.
How many of Petroleum's wells are still active?
25 of Petroleum's catalogued wells are active; 816 are plugged & abandoned and 1 are flagged as orphaned.
In which states does Petroleum operate wells?
Petroleum is the operator of record for wells in Kansas (269), Colorado (234), Wyoming (173), Kentucky (60), North Dakota (53), Oklahoma (50), Montana (33), Utah (6), Illinois (3), Mississippi (3) and Louisiana (1).
Does Petroleum operate mostly oil or gas wells?
369 of Petroleum's catalogued wells are oil wells and 35 are gas wells; the rest are injection, service or unclassified wells.
What is Petroleum's deepest well?
Among wells with a published depth, Thompson 1 in Mckenzie, ND is the deepest at 14,102 ft.
Where Petroleum's wells are
- Oil & gas wells in Kansas· 269 operated by Petroleum
- Oil & gas wells in Colorado· 234 operated by Petroleum
- Oil & gas wells in Wyoming· 173 operated by Petroleum
- Oil & gas wells in Kentucky· 60 operated by Petroleum
- Oil & gas wells in North Dakota· 53 operated by Petroleum
- Oil & gas wells in Oklahoma· 50 operated by Petroleum
- Largest U.S. well operators
- All well operators
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, “Petroleum — well portfolio”, https://wellcensus.com/operators/petroleum-1388 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).