Zill Leonard
Operator of record for 49 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Zill Leonard is the operator of record for 49 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 0 (0%) are plugged & abandoned. Its largest concentration is in Michigan, with 49 wells (100% of its portfolio).
Wells operated
49
Active
0
Plugged
0
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Michigan | 49 |
Well mix
- Oil wells
- 0
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim your operator profileWhere does Zill Leonard operate?
Zill Leonard's catalogued wells are spread across 1 state: Michigan (49). Its 49 Michigan wells are 0.1% of the 85,673 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 Zill Leonard’s wells are active, plugged or orphaned?
0% of Zill Leonard's catalogued wells are active, 29 percentage points below 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 Zill Leonard 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 Zill Coal test 23 in Bay, MI at 236 ft.
Notable wells operated by Zill Leonard
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Zill Coal test 23 | 21-017-61428 | Other status | Other type | Bay, MI | Zill, Leonard | 236 ft |
| Zill Coal test 32 | 21-017-61437 | Other status | Other type | Bay, MI | Zill, Leonard | 229 ft |
| Zill Coal test 9 | 21-017-61414 | Other status | Other type | Bay, MI | Zill, Leonard | 216 ft |
| Zill Coal test 33 | 21-017-61438 | Other status | Other type | Bay, MI | Zill, Leonard | 211 ft |
| Zill Coal test 10 | 21-017-61415 | Other status | Other type | Bay, MI | Zill, Leonard | 209 ft |
| Zill Coal test 28 | 21-017-61433 | Other status | Other type | Bay, MI | Zill, Leonard | 204 ft |
| Zill Coal test 14 | 21-017-61419 | Other status | Other type | Bay, MI | Zill, Leonard | 201 ft |
| Zill Coal test 15 | 21-017-61420 | Other status | Other type | Bay, MI | Zill, Leonard | 199 ft |
| Zill Coal test 37 | 21-017-61442 | Other status | Other type | Bay, MI | Zill, Leonard | 195 ft |
| Zill Coal test 6 | 21-017-61411 | Other status | Other type | Bay, MI | Zill, Leonard | 193 ft |
| Zill Coal test 25 | 21-017-61430 | Other status | Other type | Bay, MI | Zill, Leonard | 192 ft |
| Zill Coal test 20 | 21-017-61425 | Other status | Other type | Bay, MI | Zill, Leonard | 191 ft |
Deepest first where depth is published. See all 49 wells →
Frequently asked questions
How many wells does Zill Leonard operate?
Zill Leonard is the operator of record for 49 catalogued oil & gas wells, with the largest concentration in Michigan (49). Only wells in states WellCensus has ingested are counted.
How many of Zill Leonard's wells are still active?
0 of Zill Leonard's catalogued wells are active; 0 are plugged & abandoned.
In which states does Zill Leonard operate wells?
Zill Leonard is the operator of record for wells in Michigan (49).
Does Zill Leonard operate mostly oil or gas wells?
0 of Zill Leonard's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Zill Leonard's deepest well?
Among wells with a published depth, Zill Coal test 23 in Bay, MI is the deepest at 236 ft.
Where Zill 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, “Zill Leonard — well portfolio”, https://wellcensus.com/operators/zill-leonard-117364 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).