Marias River Syndicate
Operator of record for 8 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Marias River Syndicate is the operator of record for 8 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 8 (100%) are plugged & abandoned. Its largest concentration is in Montana, with 8 wells (100% of its portfolio).
Wells operated
8
Active
0
Plugged
8
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Montana | 8 |
Well mix
- Oil wells
- 7
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Marias River Syndicate operate?
Marias River Syndicate's catalogued wells are spread across 1 state: Montana (8). Its 8 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 Marias River Syndicate’s wells are active, plugged or orphaned?
0% of Marias River Syndicate's catalogued wells are active, 29 percentage points below the national share of 29%. 100% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Marias River Syndicate operate?
By product class, 7 (88%) are oil wells and 0 (0%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Zachor 6 in Toole, MT at 1,760 ft.
Notable wells operated by Marias River Syndicate
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Zachor 6 | 25-101-10581 | Plugged & abandoned | Oil | Toole, MT | Marias River Syndicate | 1,760 ft |
| Zachor 8 | 25-101-10582 | Plugged & abandoned | Oil | Toole, MT | Marias River Syndicate | 1,755 ft |
| Zachor 5 | 25-101-10580 | Plugged & abandoned | Oil | Toole, MT | Marias River Syndicate | 1,595 ft |
| Zachor 4 | 25-101-10579 | Plugged & abandoned | Other type | Toole, MT | Marias River Syndicate | 1,582 ft |
| Zachor 1 (-) | 25-101-10577 | Plugged & abandoned | Oil | Toole, MT | Marias River Syndicate | 1,580 ft |
| Haskins 38-1A | 25-101-10424 | Plugged & abandoned | Oil | Toole, MT | Marias River Syndicate | — |
| Haskins 38-3A | 25-101-10428 | Plugged & abandoned | Oil | Toole, MT | Marias River Syndicate | — |
| Haskins 38-4A | 25-101-10425 | Plugged & abandoned | Oil | Toole, MT | Marias River Syndicate | — |
Deepest first where depth is published. See all 8 wells →
Frequently asked questions
How many wells does Marias River Syndicate operate?
Marias River Syndicate is the operator of record for 8 catalogued oil & gas wells, with the largest concentration in Montana (8). Only wells in states WellCensus has ingested are counted.
How many of Marias River Syndicate's wells are still active?
0 of Marias River Syndicate's catalogued wells are active; 8 are plugged & abandoned.
In which states does Marias River Syndicate operate wells?
Marias River Syndicate is the operator of record for wells in Montana (8).
Does Marias River Syndicate operate mostly oil or gas wells?
7 of Marias River Syndicate's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Marias River Syndicate's deepest well?
Among wells with a published depth, Zachor 6 in Toole, MT is the deepest at 1,760 ft.
Where Marias River Syndicate'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, “Marias River Syndicate — well portfolio”, https://wellcensus.com/operators/marias-river-syndicate-129889 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).