Eureka Oil
Operator of record for 20 catalogued wells across 8 states. Every well below links to its full registry page.
Filed as: EUREKA OIL · EUREKA OIL CO · EUREKA OIL COMPANY · EUREKA OIL CORP · …
At a glance
Eureka Oil is the operator of record for 20 catalogued U.S. oil & gas wells in 8 states. None is listed as active, 19 (95%) are plugged & abandoned and 1 flagged as orphaned. Its largest concentration is in California, with 10 wells (50% of its portfolio).
Wells operated
20
Active
0
Plugged
19
Orphaned
1
Portfolio by state
| State | Wells |
|---|---|
| California | 10 |
| Colorado | 4 |
| Illinois | 1 |
| Kentucky | 1 |
| Louisiana | 1 |
| Michigan | 1 |
| Utah | 1 |
| Wyoming | 1 |
Well mix
- Oil wells
- 10
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
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Claim Eureka Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Eureka Oil operate?
Eureka Oil's catalogued wells are spread across 8 states: California (10), Colorado (4), Illinois (1), Kentucky (1) and Louisiana (1) and 3 more. Its 10 California wells are 0.0% of the 242,471 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 Eureka Oil’s wells are active, plugged or orphaned?
0% of Eureka Oil's catalogued wells are active, 29 percentage points below the national share of 29%. 95% are plugged & abandoned, against 47% nationally. 1 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Eureka Oil operate?
By product class, 10 (50%) 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 Placid 001 in Catahoula, LA at 6,450 ft. The wells listed below sit in Catahoula (LA), Morgan (CO), Bay (MI), Boulder (CO), Macon (IL) and Daviess (KY) and other counties. State filings spell the name 7 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Eureka Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Placid 001 | 17-025-21564 | Plugged & abandoned | Other type | Catahoula, LA | Eureka Oil Company | 6,450 ft |
| 1-17 Sheppard | 05-087-07644 | Plugged & abandoned | Other type | Morgan, CO | Eureka Oil Company | 5,304 ft |
| Lambert-Cloverleaf 1 | 21-017-01016 | Orphaned | Other type | Bay, MI | Eureka Oil Corp | 3,117 ft |
| 1 Ellison | 05-013-05019 | Plugged & abandoned | Other type | Boulder, CO | Eureka Oil Company | 2,393 ft |
| Rhodes, Wm. 1 | 12-115-00006 | Plugged & abandoned | Other type | Macon, IL | Eureka Oil Corp | 2,248 ft |
| Hagan, Laura 1 | KGS record 19982 | Plugged & abandoned | Other type | Daviess, KY | Eureka Oil Co | 1,895 ft |
| 1 Holly Sugar | 05-077-05008 | Plugged & abandoned | Oil | Mesa, CO | Eureka Oil Company | 1,665 ft |
| 1 Washburn | 05-013-60007 | Plugged & abandoned | Other type | Boulder, CO | Eureka Oil Company | 1,035 ft |
| Govt 1 | 49-025-08570 | Plugged & abandoned | Oil | Natrona, WY | Eureka Oil | 314 ft |
| Well No. 14 | 04-111-00607 | Plugged & abandoned | Oil | Ventura, CA | Eureka Oil Co. | — |
| 1 | 43-005-20014 | Plugged & abandoned | Oil | Cache, UT | Eureka Oil Co | — |
| Well No. 7 | 04-111-00606 | Plugged & abandoned | Oil | Ventura, CA | Eureka Oil Co. | — |
Deepest first where depth is published. See all 20 wells →
Frequently asked questions
How many wells does Eureka Oil operate?
Eureka Oil is the operator of record for 20 catalogued oil & gas wells, with the largest concentration in California (10). Only wells in states WellCensus has ingested are counted.
How many of Eureka Oil's wells are still active?
0 of Eureka Oil's catalogued wells are active; 19 are plugged & abandoned and 1 are flagged as orphaned.
In which states does Eureka Oil operate wells?
Eureka Oil is the operator of record for wells in California (10), Colorado (4), Illinois (1), Kentucky (1), Louisiana (1), Michigan (1), Utah (1) and Wyoming (1).
Does Eureka Oil operate mostly oil or gas wells?
10 of Eureka Oil's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Eureka Oil's deepest well?
Among wells with a published depth, Placid 001 in Catahoula, LA is the deepest at 6,450 ft.
Where Eureka Oil's wells are
- Oil & gas wells in California· 10 operated by Eureka Oil
- Oil & gas wells in Colorado· 4 operated by Eureka Oil
- Oil & gas wells in Illinois· 1 operated by Eureka Oil
- Oil & gas wells in Kentucky· 1 operated by Eureka Oil
- Oil & gas wells in Louisiana· 1 operated by Eureka Oil
- Oil & gas wells in Michigan· 1 operated by Eureka 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, “Eureka Oil — well portfolio”, https://wellcensus.com/operators/eureka-oil-2946 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).