Monco
Operator of record for 25 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Monco is the operator of record for 25 catalogued U.S. oil & gas wells in 1 state. 9 (36%) are active, 8 (32%) plugged & abandoned. Its largest concentration is in Illinois, with 25 wells (100% of its portfolio).
Wells operated
25
Active
9
Plugged
8
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 25 |
Well mix
- Oil wells
- 12
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 36%
Is this your company?
Claim Monco to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Monco operate?
Monco's catalogued wells are spread across 1 state: Illinois (25). Its 25 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 Monco’s wells are active, plugged or orphaned?
36% of Monco's catalogued wells are active, 7 percentage points above the national share of 29%. 32% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Monco operate?
By product class, 12 (48%) 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 Sinnickson, Richard 1 in Effingham, IL at 2,520 ft. The wells listed below sit in Effingham (IL), Jefferson (IL), Shelby (IL) and Lawrence (IL).
Notable wells operated by Monco
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Sinnickson, Richard 1 | 12-049-00695 | Plugged & abandoned | Injection | Effingham, IL | Monco, Inc. | 2,520 ft |
| Mandrell 2-N | 12-081-25144 | Plugged & abandoned | Oil | Jefferson, IL | Monco, Inc. | 2,513 ft |
| Earl 1-N | 12-081-25147 | Plugged & abandoned | Oil | Jefferson, IL | Monco, Inc. | 2,505 ft |
| Simonton 1-N | 12-081-25161 | Plugged & abandoned | Oil | Jefferson, IL | Monco, Inc. | 2,500 ft |
| Panzier 1 | 12-081-25130 | Other status | Oil | Jefferson, IL | Monco, Inc. | 2,465 ft |
| Kehrer 2-N | 12-081-25142 | Active | Oil | Jefferson, IL | Monco, Inc. | 2,239 ft |
| Sides 3N | 12-081-25151 | Active | Oil | Jefferson, IL | Monco, Inc. | 2,215 ft |
| Kehrer 1-N | 12-081-25140 | Plugged & abandoned | Oil | Jefferson, IL | Monco, Inc. | 2,206 ft |
| Kehrer, Vernon 1 | 12-081-24471 | Active | Oil | Jefferson, IL | Monco, Inc. | 2,200 ft |
| Kehrer 3-N | 12-081-25143 | Active | Oil | Jefferson, IL | Monco, Inc. | 2,038 ft |
| Kennell 1-N | 12-173-24361 | Plugged & abandoned | Other type | Shelby, IL | Monco, Inc. | 1,860 ft |
| Legg-Hardacre 1 | 12-101-29255 | Active | Oil | Lawrence, IL | Monco, Inc. | 1,750 ft |
Deepest first where depth is published. See all 25 wells →
Frequently asked questions
How many wells does Monco operate?
Monco is the operator of record for 25 catalogued oil & gas wells, with the largest concentration in Illinois (25). Only wells in states WellCensus has ingested are counted.
How many of Monco's wells are still active?
9 of Monco's catalogued wells are active; 8 are plugged & abandoned.
In which states does Monco operate wells?
Monco is the operator of record for wells in Illinois (25).
Does Monco operate mostly oil or gas wells?
12 of Monco's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Monco's deepest well?
Among wells with a published depth, Sinnickson, Richard 1 in Effingham, IL is the deepest at 2,520 ft.
Where Monco'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, “Monco — well portfolio”, https://wellcensus.com/operators/monco-66806 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).