Ewing & Marquis
Operator of record for 25 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Ewing & Marquis is the operator of record for 25 catalogued U.S. oil & gas wells in 1 state. 3 (12%) are active, 15 (60%) plugged & abandoned. Its largest concentration is in Illinois, with 25 wells (100% of its portfolio).
Wells operated
25
Active
3
Plugged
15
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 25 |
Well mix
- Oil wells
- 4
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 12%
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Claim your operator profileWhere does Ewing & Marquis operate?
Ewing & Marquis'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 Ewing & Marquis’s wells are active, plugged or orphaned?
12% of Ewing & Marquis's catalogued wells are active, 17 percentage points below the national share of 29%. 60% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Ewing & Marquis operate?
By product class, 4 (16%) 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 Ducomb 3 in Clinton, IL at 1,382 ft.
Notable wells operated by Ewing & Marquis
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Ducomb 3 | 12-027-00003 | Plugged & abandoned | Other type | Clinton, IL | Ewing & Marquis | 1,382 ft |
| Sprehe 1 | 12-027-00187 | Plugged & abandoned | Other type | Clinton, IL | Ewing & Marquis | 1,349 ft |
| Ducomb | 12-027-00177 | Other status | Other type | Clinton, IL | Ewing & Marquis | 1,310 ft |
| Brimmer 1 | 12-027-00148 | Other status | Other type | Clinton, IL | Ewing & Marquis | 1,081 ft |
| Varrel 1 | 12-027-00198 | Plugged & abandoned | Other type | Clinton, IL | Ewing & Marquis | 1,067 ft |
| Varrel 1 | 12-027-00193 | Plugged & abandoned | Other type | Clinton, IL | Ewing & Marquis | 1,065 ft |
| Koch J O 2 | 12-027-00109 | Plugged & abandoned | Other type | Clinton, IL | Ewing & Marquis | 1,061 ft |
| Schemal 1 | 12-027-00192 | Plugged & abandoned | Other type | Clinton, IL | Ewing & Marquis | 1,055 ft |
| McCabe 8 | 12-027-00090 | Active | Oil | Clinton, IL | Ewing & Marquis | 1,052 ft |
| Schaffley 12 | 12-027-00107 | Plugged & abandoned | Oil | Clinton, IL | Ewing & Marquis | 1,036 ft |
| Koch 4 | 12-027-00049 | Plugged & abandoned | Other type | Clinton, IL | Ewing & Marquis | 972 ft |
| Meyer C | 12-027-00051 | Plugged & abandoned | Other type | Clinton, IL | Ewing & Marquis | 964 ft |
Deepest first where depth is published. See all 25 wells →
Frequently asked questions
How many wells does Ewing & Marquis operate?
Ewing & Marquis 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 Ewing & Marquis's wells are still active?
3 of Ewing & Marquis's catalogued wells are active; 15 are plugged & abandoned.
In which states does Ewing & Marquis operate wells?
Ewing & Marquis is the operator of record for wells in Illinois (25).
Does Ewing & Marquis operate mostly oil or gas wells?
4 of Ewing & Marquis's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Ewing & Marquis's deepest well?
Among wells with a published depth, Ducomb 3 in Clinton, IL is the deepest at 1,382 ft.
Where Ewing & Marquis'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, “Ewing & Marquis — well portfolio”, https://wellcensus.com/operators/ewing-marquis-94173 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).