Chicago
Operator of record for 24 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: CHICAGO CORP · Chicago Corp.
At a glance
Chicago is the operator of record for 24 catalogued U.S. oil & gas wells in 2 states. None is listed as active, 24 (100%) are plugged & abandoned. Its largest concentration is in Montana, with 14 wells (58% of its portfolio).
Wells operated
24
Active
0
Plugged
24
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Montana | 14 |
| Colorado | 10 |
Well mix
- Oil wells
- 2
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Chicago to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Chicago operate?
Chicago's catalogued wells are spread across 2 states: Montana (14) and Colorado (10). Its 14 Montana wells are 0.0% of the 42,011 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 Chicago’s wells are active, plugged or orphaned?
0% of Chicago'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 Chicago operate?
By product class, 2 (8%) 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 1 State in Weld, CO at 6,944 ft. The wells listed below sit in Weld (CO), Montrose (CO), Washington (CO), Morgan (CO), Phillips (MT) and Musselshell (MT). State filings spell the name 2 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Chicago
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| 1 State | 05-123-05477 | Plugged & abandoned | Other type | Weld, CO | Chicago Corp | 6,944 ft |
| 1 Otho Ayers | 05-085-05021 | Plugged & abandoned | Other type | Montrose, CO | Chicago Corp | 6,860 ft |
| 1 Jolly-High | 05-121-05670 | Plugged & abandoned | Other type | Washington, CO | Chicago Corp | 5,101 ft |
| 1 Chester Kincheloe | 05-087-05026 | Plugged & abandoned | Other type | Morgan, CO | Chicago Corp | 5,027 ft |
| 1 Donald J. Tuttle | 05-121-06911 | Plugged & abandoned | Other type | Washington, CO | Chicago Corp | 5,024 ft |
| 9 Leona M. Yoder | 05-121-05837 | Plugged & abandoned | Other type | Washington, CO | Chicago Corp | 5,004 ft |
| 3 M Morgan Et Al | 05-121-06395 | Plugged & abandoned | Other type | Washington, CO | Chicago Corp | 4,953 ft |
| 1 Oscar Landaker | 05-121-05493 | Plugged & abandoned | Other type | Washington, CO | Chicago Corp | 4,913 ft |
| 1 Harry S Duncan Et Ux | 05-121-06811 | Plugged & abandoned | Oil | Washington, CO | Chicago Corp | 4,906 ft |
| Govt.-Holly 1 | 25-071-05178 | Plugged & abandoned | Other type | Phillips, MT | Chicago Corp. | 4,779 ft |
| Govt. US Smelting 1 | 25-071-05173 | Plugged & abandoned | Other type | Phillips, MT | Chicago Corp. | 4,667 ft |
| Sachs 1 | 25-065-05386 | Plugged & abandoned | Other type | Musselshell, MT | Chicago Corp. | 4,514 ft |
Deepest first where depth is published. See all 24 wells →
Frequently asked questions
How many wells does Chicago operate?
Chicago is the operator of record for 24 catalogued oil & gas wells, with the largest concentration in Montana (14). Only wells in states WellCensus has ingested are counted.
How many of Chicago's wells are still active?
0 of Chicago's catalogued wells are active; 24 are plugged & abandoned.
In which states does Chicago operate wells?
Chicago is the operator of record for wells in Montana (14) and Colorado (10).
Does Chicago operate mostly oil or gas wells?
2 of Chicago's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Chicago's deepest well?
Among wells with a published depth, 1 State in Weld, CO is the deepest at 6,944 ft.
Where Chicago'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, “Chicago — well portfolio”, https://wellcensus.com/operators/chicago-16974 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).