Whelan Thomas
Operator of record for 3 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Whelan Thomas is the operator of record for 3 catalogued U.S. oil & gas wells in 1 state. 3 (100%) are active, 0 (0%) plugged & abandoned. Its largest concentration is in Illinois, with 3 wells (100% of its portfolio).
Wells operated
3
Active
3
Plugged
0
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 3 |
Well mix
- Oil wells
- 3
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 100%
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Claim your operator profileWhere does Whelan Thomas operate?
Whelan Thomas's catalogued wells are spread across 1 state: Illinois (3). Its 3 Illinois wells are 0.0% of the 174,478 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 Whelan Thomas’s wells are active, plugged or orphaned?
100% of Whelan Thomas's catalogued wells are active, 71 percentage points above the national share of 29%. 0% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Whelan Thomas operate?
By product class, 3 (100%) 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 Mellon in St. Clair, IL at 556 ft.
Notable wells operated by Whelan Thomas
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Mellon | 12-163-01656 | Active | Oil | St. Clair, IL | Whelan Thomas | 556 ft |
| Nieman 1 | 12-163-01659 | Active | Oil | St. Clair, IL | Whelan Thomas | 554 ft |
| Herbst 1 | 12-163-01650 | Active | Oil | St. Clair, IL | Whelan Thomas | 541 ft |
Deepest first where depth is published. See all 3 wells →
Frequently asked questions
How many wells does Whelan Thomas operate?
Whelan Thomas is the operator of record for 3 catalogued oil & gas wells, with the largest concentration in Illinois (3). Only wells in states WellCensus has ingested are counted.
How many of Whelan Thomas's wells are still active?
3 of Whelan Thomas's catalogued wells are active; 0 are plugged & abandoned.
In which states does Whelan Thomas operate wells?
Whelan Thomas is the operator of record for wells in Illinois (3).
Does Whelan Thomas operate mostly oil or gas wells?
3 of Whelan Thomas's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Whelan Thomas's deepest well?
Among wells with a published depth, Mellon in St. Clair, IL is the deepest at 556 ft.
Where Whelan Thomas'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, “Whelan Thomas — well portfolio”, https://wellcensus.com/operators/whelan-thomas-109014 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).