Cavalier Petroleum
Operator of record for 118 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: Cavalier Petroleum · Cavalier Petroleum, Inc.
At a glance
Cavalier Petroleum is the operator of record for 118 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 98 (83%) are plugged & abandoned and 13 flagged as orphaned. Its largest concentration is in Montana, with 111 wells (94% of its portfolio).
Wells operated
118
Active
0
Plugged
98
Orphaned
13
Portfolio by state
| State | Wells |
|---|---|
| Montana | 111 |
| Illinois | 7 |
Well mix
- Oil wells
- 99
- Gas wells
- 6
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Cavalier Petroleum operate?
Cavalier Petroleum's catalogued wells are spread across 2 states: Montana (111) and Illinois (7). Its 111 Montana wells are 0.3% 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 Cavalier Petroleum’s wells are active, plugged or orphaned?
0% of Cavalier Petroleum's catalogued wells are active, 29 percentage points below the national share of 29%. 83% are plugged & abandoned, against 47% nationally. 13 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Cavalier Petroleum operate?
By product class, 99 (84%) are oil wells and 6 (5%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Thompson 9A in Toole, MT at 1,811 ft. 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 Cavalier Petroleum
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Thompson 9A | 25-101-05899 | Other status | Oil | Toole, MT | Cavalier Petroleum | 1,811 ft |
| Goeddertz 2 | 25-101-06812 | Plugged & abandoned | Oil | Toole, MT | Cavalier Petroleum | 1,786 ft |
| Hugi 1 | 25-101-06757 | Plugged & abandoned | Gas | Toole, MT | Cavalier Petroleum | 1,764 ft |
| Thompson 3B | 25-101-05843 | Other status | Oil | Toole, MT | Cavalier Petroleum | 1,760 ft |
| Thompson 10A | 25-101-05934 | Plugged & abandoned | Oil | Toole, MT | Cavalier Petroleum | 1,739 ft |
| Adams 2 | 25-101-09879 | Other status | Gas | Toole, MT | Cavalier Petroleum | 1,728 ft |
| Thomspon 1X- | 25-101-11728 | Orphaned | Oil | Toole, MT | Cavalier Petroleum | 1,719 ft |
| Thompson 1B | 25-101-05841 | Plugged & abandoned | Oil | Toole, MT | Cavalier Petroleum | 1,703 ft |
| Hamilton McKee 1 | 25-101-06892 | Plugged & abandoned | Oil | Toole, MT | Cavalier Petroleum | 1,703 ft |
| Bittner 2 | 25-101-05950 | Plugged & abandoned | Oil | Toole, MT | Cavalier Petroleum | 1,679 ft |
| Thompson 6B | 25-101-05805 | Plugged & abandoned | Oil | Toole, MT | Cavalier Petroleum | 1,676 ft |
| Martin 9 | 25-101-06483 | Plugged & abandoned | Oil | Toole, MT | Cavalier Petroleum | 1,672 ft |
Deepest first where depth is published. See all 118 wells →
Frequently asked questions
How many wells does Cavalier Petroleum operate?
Cavalier Petroleum is the operator of record for 118 catalogued oil & gas wells, with the largest concentration in Montana (111). Only wells in states WellCensus has ingested are counted.
How many of Cavalier Petroleum's wells are still active?
0 of Cavalier Petroleum's catalogued wells are active; 98 are plugged & abandoned and 13 are flagged as orphaned.
In which states does Cavalier Petroleum operate wells?
Cavalier Petroleum is the operator of record for wells in Montana (111) and Illinois (7).
Does Cavalier Petroleum operate mostly oil or gas wells?
99 of Cavalier Petroleum's catalogued wells are oil wells and 6 are gas wells; the rest are injection, service or unclassified wells.
What is Cavalier Petroleum's deepest well?
Among wells with a published depth, Thompson 9A in Toole, MT is the deepest at 1,811 ft.
Where Cavalier Petroleum'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, “Cavalier Petroleum — well portfolio”, https://wellcensus.com/operators/cavalier-petroleum-70740 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).