Cardinal Oil
Operator of record for 71 catalogued wells across 4 states. Every well below links to its full registry page.
Filed as: CARDINAL OIL CO · CARDINAL OIL LLC · Cardinal Oil Company · Cardinal Oil, LLC
At a glance
Cardinal Oil is the operator of record for 71 catalogued U.S. oil & gas wells in 4 states. 27 (38%) are active, 13 (18%) plugged & abandoned. Its largest concentration is in Montana, with 35 wells (49% of its portfolio).
Wells operated
71
Active
27
Plugged
13
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Montana | 35 |
| Oklahoma | 26 |
| Illinois | 5 |
| Pennsylvania | 5 |
Well mix
- Oil wells
- 28
- Gas wells
- 24
- Shut-in
- 28
- Active share
- 38%
Is this your company?
Claim Cardinal Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Cardinal Oil operate?
Cardinal Oil's catalogued wells are spread across 4 states: Montana (35), Oklahoma (26), Illinois (5) and Pennsylvania (5). Its 35 Montana wells are 0.1% 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 Cardinal Oil’s wells are active, plugged or orphaned?
38% of Cardinal Oil's catalogued wells are active, 9 percentage points above the national share of 29%. 18% are plugged & abandoned, against 47% nationally. 28 wells (39%) are shut-in — unplugged but idle. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Cardinal Oil operate?
By product class, 28 (39%) are oil wells and 24 (34%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Jacobsen Farms Inc. 1-14-23H in Roosevelt, MT at 19,827 ft. The wells listed below sit in Roosevelt (MT) and Rosebud (MT). State filings spell the name 4 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Cardinal Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Jacobsen Farms Inc. 1-14-23H | 25-085-21856 | Shut-in | Oil | Roosevelt, MT | Cardinal Oil, LLC | 19,827 ft |
| Jacobsen 1-14H | 25-085-21718 | Plugged & abandoned | Oil | Roosevelt, MT | Cardinal Oil, LLC | 12,773 ft |
| Jacobsen 2-13 | 25-085-21123 | Shut-in | Oil | Roosevelt, MT | Cardinal Oil, LLC | 12,353 ft |
| McCabe 1 | 25-085-21050 | Shut-in | Oil | Roosevelt, MT | Cardinal Oil, LLC | 12,210 ft |
| McCabe 2 | 25-085-21299 | Active | Injection | Roosevelt, MT | Cardinal Oil, LLC | 12,206 ft |
| McCabe 1X | 25-085-21617 | Shut-in | Oil | Roosevelt, MT | Cardinal Oil, LLC | 12,200 ft |
| Waldow 33-34 1 | 25-085-21127 | Plugged & abandoned | Other type | Roosevelt, MT | Cardinal Oil, LLC | 12,150 ft |
| McCabe Farms 1-4 | 25-085-21628 | Shut-in | Oil | Roosevelt, MT | Cardinal Oil, LLC | 12,120 ft |
| Johnson 7-21H | 25-085-21699 | Shut-in | Oil | Roosevelt, MT | Cardinal Oil, LLC | 10,670 ft |
| Allen 10-31 22-27-H1 | 25-087-21750 | Other status | Oil | Rosebud, MT | Cardinal Oil, LLC | 10,218 ft |
| State 2 | 25-085-21606 | Shut-in | Oil | Roosevelt, MT | Cardinal Oil, LLC | 8,825 ft |
| Wheeler Ranch 9-16 | 25-085-21789 | Shut-in | Oil | Roosevelt, MT | Cardinal Oil, LLC | 8,653 ft |
Deepest first where depth is published. See all 71 wells →
Frequently asked questions
How many wells does Cardinal Oil operate?
Cardinal Oil is the operator of record for 71 catalogued oil & gas wells, with the largest concentration in Montana (35). Only wells in states WellCensus has ingested are counted.
How many of Cardinal Oil's wells are still active?
27 of Cardinal Oil's catalogued wells are active; 13 are plugged & abandoned.
In which states does Cardinal Oil operate wells?
Cardinal Oil is the operator of record for wells in Montana (35), Oklahoma (26), Illinois (5) and Pennsylvania (5).
Does Cardinal Oil operate mostly oil or gas wells?
28 of Cardinal Oil's catalogued wells are oil wells and 24 are gas wells; the rest are injection, service or unclassified wells.
What is Cardinal Oil's deepest well?
Among wells with a published depth, Jacobsen Farms Inc. 1-14-23H in Roosevelt, MT is the deepest at 19,827 ft.
Where Cardinal 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, “Cardinal Oil — well portfolio”, https://wellcensus.com/operators/cardinal-oil-4826 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).