Lamarsa
Operator of record for 75 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Lamarsa is the operator of record for 75 catalogued U.S. oil & gas wells in 1 state. 57 (76%) are active, 1 (1%) plugged & abandoned. Its largest concentration is in Montana, with 75 wells (100% of its portfolio).
Wells operated
75
Active
57
Plugged
1
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Montana | 75 |
Well mix
- Oil wells
- 6
- Gas wells
- 69
- Shut-in
- 17
- Active share
- 76%
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Claim Lamarsa to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Lamarsa operate?
Lamarsa's catalogued wells are spread across 1 state: Montana (75). Its 75 Montana wells are 0.2% 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 Lamarsa’s wells are active, plugged or orphaned?
76% of Lamarsa's catalogued wells are active, 47 percentage points above the national share of 29%. 1% are plugged & abandoned, against 47% nationally. 17 wells (23%) are shut-in — unplugged but idle. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Lamarsa operate?
By product class, 6 (8%) are oil wells and 69 (92%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Anderson 5-1 in Glacier, MT at 3,240 ft. The wells listed below sit in Glacier (MT), Liberty (MT) and Toole (MT).
Notable wells operated by Lamarsa
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Anderson 5-1 | 25-035-21366 | Active | Gas | Glacier, MT | LaMarsa Corp. | 3,240 ft |
| Tuma 1 | 25-035-21223 | Shut-in | Gas | Glacier, MT | LaMarsa Corp. | 2,906 ft |
| Demarest 3-32 | 25-051-21569 | Active | Gas | Liberty, MT | LaMarsa Corp. | 2,771 ft |
| State 1 | 25-101-08602 | Active | Gas | Toole, MT | LaMarsa Corp. | 2,242 ft |
| Gallagher 12-30 | 25-101-23364 | Active | Gas | Toole, MT | LaMarsa Corp. | 2,060 ft |
| Landowners 1 | 25-101-05122 | Active | Gas | Toole, MT | LaMarsa Corp. | 2,022 ft |
| Coombs 1 | 25-101-05139 | Active | Gas | Toole, MT | LaMarsa Corp. | 1,980 ft |
| Schimmel 1 | 25-101-05126 | Active | Gas | Toole, MT | LaMarsa Corp. | 1,941 ft |
| Shuler 1 | 25-101-05149 | Active | Gas | Toole, MT | LaMarsa Corp. | 1,852 ft |
| Dyrdahl 16-29 | 25-101-22029 | Shut-in | Gas | Toole, MT | LaMarsa Corp. | 1,780 ft |
| Rittenhouse 11-1 | 25-101-21645 | Active | Gas | Toole, MT | LaMarsa Corp. | 1,727 ft |
| Atkins 4-19 | 25-101-23120 | Shut-in | Gas | Toole, MT | LaMarsa Corp. | 1,633 ft |
Deepest first where depth is published. See all 75 wells →
Frequently asked questions
How many wells does Lamarsa operate?
Lamarsa is the operator of record for 75 catalogued oil & gas wells, with the largest concentration in Montana (75). Only wells in states WellCensus has ingested are counted.
How many of Lamarsa's wells are still active?
57 of Lamarsa's catalogued wells are active; 1 are plugged & abandoned.
In which states does Lamarsa operate wells?
Lamarsa is the operator of record for wells in Montana (75).
Does Lamarsa operate mostly oil or gas wells?
6 of Lamarsa's catalogued wells are oil wells and 69 are gas wells; the rest are injection, service or unclassified wells.
What is Lamarsa's deepest well?
Among wells with a published depth, Anderson 5-1 in Glacier, MT is the deepest at 3,240 ft.
Where Lamarsa'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, “Lamarsa — well portfolio”, https://wellcensus.com/operators/lamarsa-127489 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).