Seneca Oil & Gas
Operator of record for 4 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Seneca Oil & Gas is the operator of record for 4 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 4 (100%) are plugged & abandoned. Its largest concentration is in Colorado, with 4 wells (100% of its portfolio).
Wells operated
4
Active
0
Plugged
4
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Colorado | 4 |
Well mix
- Oil wells
- 1
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Seneca Oil & Gas to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Seneca Oil & Gas operate?
Seneca Oil & Gas's catalogued wells are spread across 1 state: Colorado (4). Its 4 Colorado wells are 0.0% of the 124,327 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 & Gas’s wells are active, plugged or orphaned?
0% of Seneca Oil & Gas'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 Seneca Oil & Gas operate?
By product class, 1 (25%) 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 1 Kleff in Weld, CO at 6,945 ft. The wells listed below sit in Weld (CO), Morgan (CO), Washington (CO) and Logan (CO).
Notable wells operated by Seneca Oil & Gas
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| 1 Kleff | 05-123-05192 | Plugged & abandoned | Other type | Weld, CO | Seneca Oil & Gas Co | 6,945 ft |
| 1 State | 05-087-05843 | Plugged & abandoned | Other type | Morgan, CO | Seneca Oil & Gas Co | 5,230 ft |
| 2 Windolph | 05-121-06932 | Plugged & abandoned | Oil | Washington, CO | Seneca Oil & Gas Co | 5,035 ft |
| 1 Straub | 05-075-05345 | Plugged & abandoned | Other type | Logan, CO | Seneca Oil & Gas Co | 4,765 ft |
Deepest first where depth is published. See all 4 wells →
Frequently asked questions
How many wells does Seneca Oil & Gas operate?
Seneca Oil & Gas is the operator of record for 4 catalogued oil & gas wells, with the largest concentration in Colorado (4). Only wells in states WellCensus has ingested are counted.
How many of Seneca Oil & Gas's wells are still active?
0 of Seneca Oil & Gas's catalogued wells are active; 4 are plugged & abandoned.
In which states does Seneca Oil & Gas operate wells?
Seneca Oil & Gas is the operator of record for wells in Colorado (4).
Does Seneca Oil & Gas operate mostly oil or gas wells?
1 of Seneca Oil & Gas's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Seneca Oil & Gas's deepest well?
Among wells with a published depth, 1 Kleff in Weld, CO is the deepest at 6,945 ft.
Where Seneca Oil & Gas'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, “Seneca Oil & Gas — well portfolio”, https://wellcensus.com/operators/seneca-oil-gas-11136 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).