Seneca Oil
Operator of record for 216 catalogued wells across 5 states. Every well below links to its full registry page.
Filed as: SENECA OIL CO · SENECA OIL COMPANY · Seneca Oil · Seneca Oil Company
At a glance
Seneca Oil is the operator of record for 216 catalogued U.S. oil & gas wells in 5 states. 39 (18%) are active, 157 (73%) plugged & abandoned and 6 flagged as orphaned. Its largest concentration is in Oklahoma, with 142 wells (66% of its portfolio).
Wells operated
216
Active
39
Plugged
157
Orphaned
6
Portfolio by state
| State | Wells |
|---|---|
| Oklahoma | 142 |
| Pennsylvania | 53 |
| West Virginia | 19 |
| Illinois | 1 |
| Kansas | 1 |
Well mix
- Oil wells
- 100
- Gas wells
- 11
- Shut-in
- 0
- Active share
- 18%
Is this your company?
Claim Seneca Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Seneca Oil operate?
Seneca Oil's catalogued wells are spread across 5 states: Oklahoma (142), Pennsylvania (53), West Virginia (19), Illinois (1) and Kansas (1). Its 142 Oklahoma wells are 0.0% of the 456,595 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 Seneca Oil’s wells are active, plugged or orphaned?
18% of Seneca Oil's catalogued wells are active, 11 percentage points below the national share of 29%. 73% are plugged & abandoned, against 47% nationally. 6 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Seneca Oil operate?
By product class, 100 (46%) are oil wells and 11 (5%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Johnson 1 in Mcpherson, KS at 2,759 ft. The wells listed below sit in Mcpherson (KS), Marion (IL), Warren (PA), Custer (OK), Dewey (OK) and Canadian (OK) and other counties. State filings spell the name 4 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Seneca Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Johnson 1 | 15-113-00325 | Plugged & abandoned | Other type | Mcpherson, KS | Seneca Oil Company | 2,759 ft |
| Sherman | 12-121-01242 | Plugged & abandoned | Other type | Marion, IL | Seneca Oil | 574 ft |
| Pearson 1 | 37-123-35303 | Active | Oil | Warren, PA | Seneca Oil Co | — |
| Rieder 8 | 37-123-35059 | Active | Oil | Warren, PA | Seneca Oil Co | — |
| Mckinney 1 | 37-123-29530 | Active | Oil | Warren, PA | Seneca Oil Co | — |
| Schall 1 | 37-123-34493 | Active | Oil | Warren, PA | Seneca Oil Co | — |
| Stevick #1-29 | 35-039-20436 | Plugged & abandoned | Other type | Custer, OK | Seneca Oil Company | — |
| Rieder 7 | 37-123-35058 | Active | Oil | Warren, PA | Seneca Oil Co | — |
| Mcneill #1-23 | 35-043-21618 | Plugged & abandoned | Other type | Dewey, OK | Seneca Oil Company | — |
| Matthews 1 | 37-123-38144 | Active | Oil | Warren, PA | Seneca Oil Co | — |
| Simpson #4-4 | 35-017-22025 | Plugged & abandoned | Oil | Canadian, OK | Seneca Oil Company | — |
| Morris #1-21 | 35-007-20474 | Plugged & abandoned | Oil | Beaver, OK | Seneca Oil Company | — |
Deepest first where depth is published. See all 216 wells →
Frequently asked questions
How many wells does Seneca Oil operate?
Seneca Oil is the operator of record for 216 catalogued oil & gas wells, with the largest concentration in Oklahoma (142). Only wells in states WellCensus has ingested are counted.
How many of Seneca Oil's wells are still active?
39 of Seneca Oil's catalogued wells are active; 157 are plugged & abandoned and 6 are flagged as orphaned.
In which states does Seneca Oil operate wells?
Seneca Oil is the operator of record for wells in Oklahoma (142), Pennsylvania (53), West Virginia (19), Illinois (1) and Kansas (1).
Does Seneca Oil operate mostly oil or gas wells?
100 of Seneca Oil's catalogued wells are oil wells and 11 are gas wells; the rest are injection, service or unclassified wells.
What is Seneca Oil's deepest well?
Among wells with a published depth, Johnson 1 in Mcpherson, KS is the deepest at 2,759 ft.
Where Seneca Oil's wells are
- Oil & gas wells in Oklahoma· 142 operated by Seneca Oil
- Oil & gas wells in Pennsylvania· 53 operated by Seneca Oil
- Oil & gas wells in West Virginia· 19 operated by Seneca Oil
- Oil & gas wells in Illinois· 1 operated by Seneca Oil
- Oil & gas wells in Kansas· 1 operated by Seneca Oil
- Largest U.S. well operators
- All well operators
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, “Seneca Oil — well portfolio”, https://wellcensus.com/operators/seneca-oil-308 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).