Oslager Oil
Operator of record for 43 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Oslager Oil is the operator of record for 43 catalogued U.S. oil & gas wells in 1 state. 2 (5%) are active, 32 (74%) plugged & abandoned and 9 flagged as orphaned. Its largest concentration is in Illinois, with 43 wells (100% of its portfolio).
Wells operated
43
Active
2
Plugged
32
Orphaned
9
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 43 |
Well mix
- Oil wells
- 25
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 5%
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Claim your operator profileWhere does Oslager Oil operate?
Oslager Oil's catalogued wells are spread across 1 state: Illinois (43). Its 43 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 Oslager Oil’s wells are active, plugged or orphaned?
5% of Oslager Oil's catalogued wells are active, 24 percentage points below the national share of 29%. 74% are plugged & abandoned, against 47% nationally. 9 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Oslager Oil operate?
By product class, 25 (58%) 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 Duff Heirs 1 in Clay, IL at 3,612 ft. The wells listed below sit in Clay (IL) and Hamilton (IL).
Notable wells operated by Oslager Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Duff Heirs 1 | 12-025-01847 | Plugged & abandoned | Oil | Clay, IL | Oslager Oil Company | 3,612 ft |
| Harralsen, Nova C-1 | 12-065-00884 | Plugged & abandoned | Oil | Hamilton, IL | Oslager Oil Company | 3,335 ft |
| Culpepper-Darnell 2 | 12-065-03280 | Orphaned | Oil | Hamilton, IL | Oslager Oil Company | 3,313 ft |
| Harrelson B R 1 | 12-065-03266 | Orphaned | Oil | Hamilton, IL | Oslager Oil Company | 3,312 ft |
| Braden-Jordan 2 | 12-065-03273 | Orphaned | Oil | Hamilton, IL | Oslager Oil Company | 3,309 ft |
| Pennington 1 | 12-065-01637 | Plugged & abandoned | Other type | Hamilton, IL | Oslager Oil Company | 3,302 ft |
| Hungate 1-B | 12-065-03259 | Plugged & abandoned | Other type | Hamilton, IL | Oslager Oil Company | 3,299 ft |
| Culpepper-Darnell 1 | 12-065-03314 | Orphaned | Oil | Hamilton, IL | Oslager Oil Company | 3,295 ft |
| Braden-Jordan 1 | 12-065-03239 | Plugged & abandoned | Oil | Hamilton, IL | Oslager Oil Company | 3,274 ft |
| Jordan Etal 1-A | 12-065-03330 | Plugged & abandoned | Oil | Hamilton, IL | Oslager Oil Company | 3,270 ft |
| Foster 2 | 12-065-03268 | Orphaned | Oil | Hamilton, IL | Oslager Oil Company | 3,259 ft |
| Johnson 1 | 12-065-01667 | Plugged & abandoned | Other type | Hamilton, IL | Oslager Oil Company | 3,255 ft |
Deepest first where depth is published. See all 43 wells →
Frequently asked questions
How many wells does Oslager Oil operate?
Oslager Oil is the operator of record for 43 catalogued oil & gas wells, with the largest concentration in Illinois (43). Only wells in states WellCensus has ingested are counted.
How many of Oslager Oil's wells are still active?
2 of Oslager Oil's catalogued wells are active; 32 are plugged & abandoned and 9 are flagged as orphaned.
In which states does Oslager Oil operate wells?
Oslager Oil is the operator of record for wells in Illinois (43).
Does Oslager Oil operate mostly oil or gas wells?
25 of Oslager Oil's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Oslager Oil's deepest well?
Among wells with a published depth, Duff Heirs 1 in Clay, IL is the deepest at 3,612 ft.
Where Oslager 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, “Oslager Oil — well portfolio”, https://wellcensus.com/operators/oslager-oil-66702 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).