Welker Oil
Operator of record for 100 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Welker Oil is the operator of record for 100 catalogued U.S. oil & gas wells in 1 state. 8 (8%) are active, 80 (80%) plugged & abandoned and 10 flagged as orphaned. Its largest concentration is in Illinois, with 100 wells (100% of its portfolio).
Wells operated
100
Active
8
Plugged
80
Orphaned
10
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 100 |
Well mix
- Oil wells
- 43
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 8%
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Claim Welker Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Welker Oil operate?
Welker Oil's catalogued wells are spread across 1 state: Illinois (100). Its 100 Illinois wells are 0.1% 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 Welker Oil’s wells are active, plugged or orphaned?
8% of Welker Oil's catalogued wells are active, 21 percentage points below the national share of 29%. 80% are plugged & abandoned, against 47% nationally. 10 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Welker Oil operate?
By product class, 43 (43%) 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 Meador 1 in Marion, IL at 4,750 ft. The wells listed below sit in Marion (IL), Wayne (IL) and Jefferson (IL).
Notable wells operated by Welker Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Meador 1 | 12-121-26583 | Plugged & abandoned | Other type | Marion, IL | Welker Oil Co., Ltd. | 4,750 ft |
| Shelton - Lowery 1 | 12-121-26315 | Orphaned | Other type | Marion, IL | Welker Oil Co., Ltd. | 4,700 ft |
| Molt 1 | 12-191-30028 | Active | Oil | Wayne, IL | Welker Oil Co., Ltd. | 3,950 ft |
| Helpingstine, John 1 | 12-121-26226 | Active | Oil | Marion, IL | Welker Oil Co., Ltd. | 3,622 ft |
| Bray 1 | 12-081-23723 | Plugged & abandoned | Other type | Jefferson, IL | Welker Oil Co., Ltd. | 3,600 ft |
| Lee-Roberts 1-D | 12-121-26337 | Plugged & abandoned | Oil | Marion, IL | Welker Oil Co., Ltd. | 3,566 ft |
| Williamson 1 | 12-081-23675 | Plugged & abandoned | Other type | Jefferson, IL | Welker Oil Co., Ltd. | 3,550 ft |
| Lee-Roberts 3-D | 12-121-26339 | Plugged & abandoned | Oil | Marion, IL | Welker Oil Co., Ltd. | 3,544 ft |
| Lee-Roberts 2-D | 12-121-26338 | Plugged & abandoned | Oil | Marion, IL | Welker Oil Co., Ltd. | 3,531 ft |
| Catron 1 | 12-081-23673 | Active | Oil | Jefferson, IL | Welker Oil Co., Ltd. | 3,525 ft |
| Catron 2 | 12-081-23674 | Active | Oil | Jefferson, IL | Welker Oil Co., Ltd. | 3,520 ft |
| Long 1 | 12-081-23705 | Plugged & abandoned | Other type | Jefferson, IL | Welker Oil Co., Ltd. | 3,520 ft |
Deepest first where depth is published. See all 100 wells →
Frequently asked questions
How many wells does Welker Oil operate?
Welker Oil is the operator of record for 100 catalogued oil & gas wells, with the largest concentration in Illinois (100). Only wells in states WellCensus has ingested are counted.
How many of Welker Oil's wells are still active?
8 of Welker Oil's catalogued wells are active; 80 are plugged & abandoned and 10 are flagged as orphaned.
In which states does Welker Oil operate wells?
Welker Oil is the operator of record for wells in Illinois (100).
Does Welker Oil operate mostly oil or gas wells?
43 of Welker Oil's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Welker Oil's deepest well?
Among wells with a published depth, Meador 1 in Marion, IL is the deepest at 4,750 ft.
Where Welker 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, “Welker Oil — well portfolio”, https://wellcensus.com/operators/welker-oil-66065 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).