Sanders Leonard
Operator of record for 10 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Sanders Leonard is the operator of record for 10 catalogued U.S. oil & gas wells in 1 state. 8 (80%) are active, 0 (0%) plugged & abandoned. Its largest concentration is in Illinois, with 10 wells (100% of its portfolio).
Wells operated
10
Active
8
Plugged
0
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 10 |
Well mix
- Oil wells
- 7
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 80%
Is this your company?
Claim Sanders Leonard to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Sanders Leonard operate?
Sanders Leonard's catalogued wells are spread across 1 state: Illinois (10). Its 10 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 Sanders Leonard’s wells are active, plugged or orphaned?
80% of Sanders Leonard's catalogued wells are active, 51 percentage points above the national share of 29%. 0% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Sanders Leonard operate?
By product class, 7 (70%) 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 Seitzinger 4 in Crawford, IL at 1,014 ft.
Notable wells operated by Sanders Leonard
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Seitzinger 4 | 12-033-09994 | Active | Oil | Crawford, IL | Sanders, Leonard | 1,014 ft |
| Montgomery, S. E. 1 | 12-033-09956 | Active | Oil | Crawford, IL | Sanders, Leonard | 998 ft |
| Seitzinger 1 | 12-033-35460 | Active | Oil | Crawford, IL | Sanders, Leonard | 988 ft |
| Kent W-3 | 12-033-02260 | Active | Injection | Crawford, IL | Sanders, Leonard | 960 ft |
| Dunlap, W. E. 2 | 12-033-07743 | Active | Oil | Crawford, IL | Sanders, Leonard | 0 ft |
| Seitzinger 2 | 12-033-09992 | Active | Oil | Crawford, IL | Sanders, Leonard | 0 ft |
| Seitzinger 3 | 12-033-09993 | Active | Oil | Crawford, IL | Sanders, Leonard | 0 ft |
| Maxwell 8 | 12-033-03195 | Other status | Other type | Crawford, IL | Sanders, Leonard | 0 ft |
| Montgomery, S. E. 2 | 12-033-35458 | Active | Oil | Crawford, IL | Sanders, Leonard | 0 ft |
| Maxwell 7 | 12-033-03193 | Other status | Other type | Crawford, IL | Sanders, Leonard | 0 ft |
Deepest first where depth is published. See all 10 wells →
Frequently asked questions
How many wells does Sanders Leonard operate?
Sanders Leonard is the operator of record for 10 catalogued oil & gas wells, with the largest concentration in Illinois (10). Only wells in states WellCensus has ingested are counted.
How many of Sanders Leonard's wells are still active?
8 of Sanders Leonard's catalogued wells are active; 0 are plugged & abandoned.
In which states does Sanders Leonard operate wells?
Sanders Leonard is the operator of record for wells in Illinois (10).
Does Sanders Leonard operate mostly oil or gas wells?
7 of Sanders Leonard's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Sanders Leonard's deepest well?
Among wells with a published depth, Seitzinger 4 in Crawford, IL is the deepest at 1,014 ft.
Where Sanders Leonard'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, “Sanders Leonard — well portfolio”, https://wellcensus.com/operators/sanders-leonard-95724 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).