Tenison Drilling
Operator of record for 15 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Tenison Drilling is the operator of record for 15 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 14 (93%) are plugged & abandoned. Its largest concentration is in Montana, with 15 wells (100% of its portfolio).
Wells operated
15
Active
0
Plugged
14
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Montana | 15 |
Well mix
- Oil wells
- 0
- Gas wells
- 1
- Shut-in
- 0
- Active share
- 0%
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Claim Tenison Drilling to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Tenison Drilling operate?
Tenison Drilling's catalogued wells are spread across 1 state: Montana (15). Its 15 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 Tenison Drilling’s wells are active, plugged or orphaned?
0% of Tenison Drilling's catalogued wells are active, 29 percentage points below the national share of 29%. 93% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Tenison Drilling operate?
By product class, 0 (0%) are oil wells and 1 (7%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Treasure Cou<>1 in Treasure, MT at 6,617 ft. The wells listed below sit in Treasure (MT), Rosebud (MT), Petroleum (MT), Musselshell (MT), Stillwater (MT) and Big Horn (MT) and other counties.
Notable wells operated by Tenison Drilling
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Treasure Cou<>1 | 25-103-05012 | Plugged & abandoned | Other type | Treasure, MT | Tenison Drilling | 6,617 ft |
| Lusk 1 | 25-103-05013 | Plugged & abandoned | Other type | Treasure, MT | Tenison Drilling | 5,975 ft |
| Grebe 1 | 25-087-05395 | Plugged & abandoned | Other type | Rosebud, MT | Tenison Drilling | 5,900 ft |
| Magelssen 2 | 25-087-05113 | Plugged & abandoned | Other type | Rosebud, MT | Tenison Drilling | 5,138 ft |
| Nprr 1 | 25-103-05009 | Plugged & abandoned | Other type | Treasure, MT | Tenison Drilling | 5,017 ft |
| Np 1 | 25-069-05006 | Plugged & abandoned | Other type | Petroleum, MT | Tenison Drilling | 4,507 ft |
| State 1-B | 25-065-05198 | Plugged & abandoned | Other type | Musselshell, MT | Tenison Drilling | 4,478 ft |
| State 1-A | 25-065-05190 | Plugged & abandoned | Other type | Musselshell, MT | Tenison Drilling | 4,407 ft |
| Barney et al 1 | 25-065-05472 | Plugged & abandoned | Other type | Musselshell, MT | Tenison Drilling | 4,044 ft |
| Hepp Keating 1 | 25-095-05044 | Other status | Gas | Stillwater, MT | Tenison Drilling | 3,875 ft |
| Spear 1 | 25-003-60064 | Plugged & abandoned | Other type | Big Horn, MT | Tenison Drilling | 2,174 ft |
| Carlstrom 1 | 25-027-60026 | Plugged & abandoned | Other type | Fergus, MT | Tenison Drilling | 1,602 ft |
Deepest first where depth is published. See all 15 wells →
Frequently asked questions
How many wells does Tenison Drilling operate?
Tenison Drilling is the operator of record for 15 catalogued oil & gas wells, with the largest concentration in Montana (15). Only wells in states WellCensus has ingested are counted.
How many of Tenison Drilling's wells are still active?
0 of Tenison Drilling's catalogued wells are active; 14 are plugged & abandoned.
In which states does Tenison Drilling operate wells?
Tenison Drilling is the operator of record for wells in Montana (15).
Does Tenison Drilling operate mostly oil or gas wells?
0 of Tenison Drilling's catalogued wells are oil wells and 1 are gas wells; the rest are injection, service or unclassified wells.
What is Tenison Drilling's deepest well?
Among wells with a published depth, Treasure Cou<>1 in Treasure, MT is the deepest at 6,617 ft.
Where Tenison Drilling'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, “Tenison Drilling — well portfolio”, https://wellcensus.com/operators/tenison-drilling-127094 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).