Twain Mark Oil Prod
Operator of record for 18 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Twain Mark Oil Prod is the operator of record for 18 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 17 (94%) are plugged & abandoned. Its largest concentration is in Illinois, with 18 wells (100% of its portfolio).
Wells operated
18
Active
0
Plugged
17
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 18 |
Well mix
- Oil wells
- 1
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Twain Mark Oil Prod operate?
Twain Mark Oil Prod's catalogued wells are spread across 1 state: Illinois (18). Its 18 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 Twain Mark Oil Prod’s wells are active, plugged or orphaned?
0% of Twain Mark Oil Prod's catalogued wells are active, 29 percentage points below the national share of 29%. 94% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Twain Mark Oil Prod operate?
By product class, 1 (6%) 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 Hall 1 in Hamilton, IL at 3,464 ft. The wells listed below sit in Hamilton (IL), White (IL), Richland (IL), Madison (IL), Clinton (IL) and Jefferson (IL).
Notable wells operated by Twain Mark Oil Prod
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Hall 1 | 12-065-01529 | Plugged & abandoned | Other type | Hamilton, IL | Twain, Mark Oil Prod. | 3,464 ft |
| Kennedy H C 1 | 12-065-01589 | Plugged & abandoned | Other type | Hamilton, IL | Twain, Mark Oil Prod. | 3,335 ft |
| Huebele Herbert 1 | 12-193-05016 | Plugged & abandoned | Other type | White, IL | Twain, Mark Oil Prod. | 3,234 ft |
| Tatum Russell 1 | 12-065-02859 | Plugged & abandoned | Other type | Hamilton, IL | Twain, Mark Oil Prod. | 3,234 ft |
| Krum C J 1 | 12-159-01635 | Plugged & abandoned | Other type | Richland, IL | Twain, Mark Oil Prod. | 3,095 ft |
| Bialaschle 2 | 12-159-00750 | Plugged & abandoned | Other type | Richland, IL | Twain, Mark Oil Prod. | 3,055 ft |
| Duvall 1 | 12-159-01547 | Plugged & abandoned | Oil | Richland, IL | Twain, Mark Oil Prod. | 3,009 ft |
| Cox 1 | 12-065-01498 | Plugged & abandoned | Other type | Hamilton, IL | Twain, Mark Oil Prod. | 2,975 ft |
| Leef, Jacob 1 | 12-119-00716 | Plugged & abandoned | Other type | Madison, IL | Twain, Mark Oil Prod. | 2,732 ft |
| DuComb 1 | 12-027-01346 | Plugged & abandoned | Other type | Clinton, IL | Twain, Mark Oil Prod. | 2,605 ft |
| Hummert 1 | 12-027-03112 | Plugged & abandoned | Other type | Clinton, IL | Twain, Mark Oil Prod. | 2,316 ft |
| Payne, Mrs. Lou 1 | 12-081-01285 | Plugged & abandoned | Other type | Jefferson, IL | Twain, Mark Oil Prod. | 2,100 ft |
Deepest first where depth is published. See all 18 wells →
Frequently asked questions
How many wells does Twain Mark Oil Prod operate?
Twain Mark Oil Prod is the operator of record for 18 catalogued oil & gas wells, with the largest concentration in Illinois (18). Only wells in states WellCensus has ingested are counted.
How many of Twain Mark Oil Prod's wells are still active?
0 of Twain Mark Oil Prod's catalogued wells are active; 17 are plugged & abandoned.
In which states does Twain Mark Oil Prod operate wells?
Twain Mark Oil Prod is the operator of record for wells in Illinois (18).
Does Twain Mark Oil Prod operate mostly oil or gas wells?
1 of Twain Mark Oil Prod's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Twain Mark Oil Prod's deepest well?
Among wells with a published depth, Hall 1 in Hamilton, IL is the deepest at 3,464 ft.
Where Twain Mark Oil Prod'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, “Twain Mark Oil Prod — well portfolio”, https://wellcensus.com/operators/twain-mark-oil-prod-94493 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).