Duncan Brothers
Operator of record for 9 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Duncan Brothers is the operator of record for 9 catalogued U.S. oil & gas wells in 1 state. 3 (33%) are active, 4 (44%) plugged & abandoned. Its largest concentration is in Illinois, with 9 wells (100% of its portfolio).
Wells operated
9
Active
3
Plugged
4
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 9 |
Well mix
- Oil wells
- 4
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 33%
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Claim Duncan Brothers to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Duncan Brothers operate?
Duncan Brothers's catalogued wells are spread across 1 state: Illinois (9). Its 9 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 Duncan Brothers’s wells are active, plugged or orphaned?
33% of Duncan Brothers's catalogued wells are active, 4 percentage points above the national share of 29%. 44% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Duncan Brothers operate?
By product class, 4 (44%) 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 Schilling 1 in Richland, IL at 3,002 ft. The wells listed below sit in Richland (IL), Macoupin (IL) and Marion (IL).
Notable wells operated by Duncan Brothers
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Schilling 1 | 12-159-00154 | Plugged & abandoned | Oil | Richland, IL | Duncan Brothers | 3,002 ft |
| Weyen, J. 9 | 12-117-00286 | Active | Oil | Macoupin, IL | Duncan Brothers | 2,560 ft |
| Woolridge, 4 | 12-117-00293 | Plugged & abandoned | Other type | Macoupin, IL | Duncan Brothers | 2,371 ft |
| Fyke C V 1 | 12-121-01028 | Plugged & abandoned | Other type | Marion, IL | Duncan Brothers | 2,174 ft |
| Weyen, H. 1 | 12-117-00132 | Plugged & abandoned | Other type | Macoupin, IL | Duncan Brothers | 663 ft |
| Weyen, J. 13 | 12-117-00452 | Active | Oil | Macoupin, IL | Duncan Brothers | 655 ft |
| Weyen, J. 7 | 12-117-00449 | Other status | Other type | Macoupin, IL | Duncan Brothers | 651 ft |
| Weyen, H. 5 | 12-117-00287 | Other status | Other type | Macoupin, IL | Duncan Brothers | 648 ft |
| Groves, Dan 4 | 12-117-00292 | Active | Oil | Macoupin, IL | Duncan Brothers | 557 ft |
Deepest first where depth is published. See all 9 wells →
Frequently asked questions
How many wells does Duncan Brothers operate?
Duncan Brothers is the operator of record for 9 catalogued oil & gas wells, with the largest concentration in Illinois (9). Only wells in states WellCensus has ingested are counted.
How many of Duncan Brothers's wells are still active?
3 of Duncan Brothers's catalogued wells are active; 4 are plugged & abandoned.
In which states does Duncan Brothers operate wells?
Duncan Brothers is the operator of record for wells in Illinois (9).
Does Duncan Brothers operate mostly oil or gas wells?
4 of Duncan Brothers's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Duncan Brothers's deepest well?
Among wells with a published depth, Schilling 1 in Richland, IL is the deepest at 3,002 ft.
Where Duncan Brothers'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, “Duncan Brothers — well portfolio”, https://wellcensus.com/operators/duncan-brothers-105362 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).