Middlesex Assoc Oil
Operator of record for 6 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Middlesex Assoc Oil is the operator of record for 6 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 6 (100%) are plugged & abandoned. Its largest concentration is in Illinois, with 6 wells (100% of its portfolio).
Wells operated
6
Active
0
Plugged
6
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 6 |
Well mix
- Oil wells
- 4
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Middlesex Assoc Oil operate?
Middlesex Assoc Oil's catalogued wells are spread across 1 state: Illinois (6). Its 6 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 Middlesex Assoc Oil’s wells are active, plugged or orphaned?
0% of Middlesex Assoc Oil's catalogued wells are active, 29 percentage points below the national share of 29%. 100% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Middlesex Assoc Oil operate?
By product class, 4 (67%) 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 Banning, M. L. 1 in Shelby, IL at 3,232 ft. The wells listed below sit in Shelby (IL), Jasper (IL), Montgomery (IL) and Lawrence (IL).
Notable wells operated by Middlesex Assoc Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Banning, M. L. 1 | 12-173-01077 | Plugged & abandoned | Other type | Shelby, IL | Middlesex Assoc Oil | 3,232 ft |
| Dhom Heirs 1-A | 12-079-01967 | Plugged & abandoned | Oil | Jasper, IL | Middlesex Assoc Oil | 2,993 ft |
| Longmeyer 1 | 12-135-01279 | Plugged & abandoned | Other type | Montgomery, IL | Middlesex Assoc Oil | 2,103 ft |
| Buchanan S 1 | 12-101-05501 | Plugged & abandoned | Oil | Lawrence, IL | Middlesex Assoc Oil | 1,951 ft |
| Breen 1 | 12-101-00285 | Plugged & abandoned | Oil | Lawrence, IL | Middlesex Assoc Oil | 1,942 ft |
| Christy, C. A. & Grover 1 | 12-101-05452 | Plugged & abandoned | Oil | Lawrence, IL | Middlesex Assoc Oil | 1,876 ft |
Deepest first where depth is published. See all 6 wells →
Frequently asked questions
How many wells does Middlesex Assoc Oil operate?
Middlesex Assoc Oil is the operator of record for 6 catalogued oil & gas wells, with the largest concentration in Illinois (6). Only wells in states WellCensus has ingested are counted.
How many of Middlesex Assoc Oil's wells are still active?
0 of Middlesex Assoc Oil's catalogued wells are active; 6 are plugged & abandoned.
In which states does Middlesex Assoc Oil operate wells?
Middlesex Assoc Oil is the operator of record for wells in Illinois (6).
Does Middlesex Assoc Oil operate mostly oil or gas wells?
4 of Middlesex Assoc Oil's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Middlesex Assoc Oil's deepest well?
Among wells with a published depth, Banning, M. L. 1 in Shelby, IL is the deepest at 3,232 ft.
Where Middlesex Assoc 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, “Middlesex Assoc Oil — well portfolio”, https://wellcensus.com/operators/middlesex-assoc-oil-102148 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).