St Mary Oil
Operator of record for 2 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
St Mary Oil is the operator of record for 2 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 0 (0%) are plugged & abandoned and 2 flagged as orphaned. Its largest concentration is in Louisiana, with 2 wells (100% of its portfolio).
Wells operated
2
Active
0
Plugged
0
Orphaned
2
Portfolio by state
| State | Wells |
|---|---|
| Louisiana | 2 |
Well mix
- Oil wells
- 0
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim St Mary Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does St Mary Oil operate?
St Mary Oil's catalogued wells are spread across 1 state: Louisiana (2). Its 2 Louisiana wells are 0.0% of the 225,728 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 St Mary Oil’s wells are active, plugged or orphaned?
0% of St Mary Oil's catalogued wells are active, 29 percentage points below the national share of 29%. 0% are plugged & abandoned, against 47% nationally. 2 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does St Mary Oil operate?
By product class, 0 (0%) 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 W C Hertel Et Al B-3 in St Mary, LA at 3,705 ft.
Notable wells operated by St Mary Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| W C Hertel Et Al B-3 | 17-101-00198 | Orphaned | Other type | St Mary, LA | St. Mary Oil Company | 3,705 ft |
| H Robichaux 006 | 17-101-00206 | Orphaned | Other type | St Mary, LA | St. Mary Oil Company | 2,754 ft |
Deepest first where depth is published. See all 2 wells →
Frequently asked questions
How many wells does St Mary Oil operate?
St Mary Oil is the operator of record for 2 catalogued oil & gas wells, with the largest concentration in Louisiana (2). Only wells in states WellCensus has ingested are counted.
How many of St Mary Oil's wells are still active?
0 of St Mary Oil's catalogued wells are active; 0 are plugged & abandoned and 2 are flagged as orphaned.
In which states does St Mary Oil operate wells?
St Mary Oil is the operator of record for wells in Louisiana (2).
Does St Mary Oil operate mostly oil or gas wells?
0 of St Mary Oil's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is St Mary Oil's deepest well?
Among wells with a published depth, W C Hertel Et Al B-3 in St Mary, LA is the deepest at 3,705 ft.
Where St Mary 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, “St Mary Oil — well portfolio”, https://wellcensus.com/operators/st-mary-oil-77480 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).