Jefferis John L
Operator of record for 9 catalogued wells across 1 state. Every well below links to its full registry page.
Filed as: Jefferis John L · Jefferis, John L.
At a glance
Jefferis John L is the operator of record for 9 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 9 (100%) are plugged & abandoned. Its largest concentration is in Illinois, with 9 wells (100% of its portfolio).
Wells operated
9
Active
0
Plugged
9
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 9 |
Well mix
- Oil wells
- 0
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Jefferis John L operate?
Jefferis John L's catalogued wells are spread across 1 state: Illinois (9). Its 9 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 Jefferis John L’s wells are active, plugged or orphaned?
0% of Jefferis John L'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 Jefferis John L operate?
By product class, 0 (0%) 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 Witte 1 in Madison, IL at 1,925 ft. The wells listed below sit in Madison (IL), St. Clair (IL), Monroe (IL) and Macoupin (IL). 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 Jefferis John L
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Witte 1 | 12-119-00613 | Plugged & abandoned | Other type | Madison, IL | Jefferis, John L. | 1,925 ft |
| Scharf, H. 1 | 12-163-01318 | Plugged & abandoned | Other type | St. Clair, IL | Jefferis, John L. | 1,216 ft |
| Tarlton 1 | 12-163-01580 | Plugged & abandoned | Other type | St. Clair, IL | Jefferis John L | 860 ft |
| Jacobi Hrs 1 | 12-133-00038 | Plugged & abandoned | Other type | Monroe, IL | Jefferis John L | 665 ft |
| Lang, Margaret 1 | 12-163-01330 | Plugged & abandoned | Other type | St. Clair, IL | Jefferis, John L. | 643 ft |
| Tetzlaff, Ivan 1 | 12-117-01074 | Plugged & abandoned | Other type | Macoupin, IL | Jefferis John L | 587 ft |
| Shourd 1 | 12-119-00550 | Plugged & abandoned | Other type | Madison, IL | Jefferis John L | 558 ft |
| Hoffman, Frank & Marie 1 | 12-133-00400 | Plugged & abandoned | Other type | Monroe, IL | Jefferis John L | 515 ft |
| West Comm. 1 | 12-119-01574 | Plugged & abandoned | Other type | Madison, IL | Jefferis John L | 495 ft |
Deepest first where depth is published. See all 9 wells →
Frequently asked questions
How many wells does Jefferis John L operate?
Jefferis John L is the operator of record for 9 catalogued oil & gas wells, with the largest concentration in Illinois (9). Only wells in states WellCensus has ingested are counted.
How many of Jefferis John L's wells are still active?
0 of Jefferis John L's catalogued wells are active; 9 are plugged & abandoned.
In which states does Jefferis John L operate wells?
Jefferis John L is the operator of record for wells in Illinois (9).
Does Jefferis John L operate mostly oil or gas wells?
0 of Jefferis John L's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Jefferis John L's deepest well?
Among wells with a published depth, Witte 1 in Madison, IL is the deepest at 1,925 ft.
Where Jefferis John L'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, “Jefferis John L — well portfolio”, https://wellcensus.com/operators/jefferis-john-l-105466 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).