Sec Oil
Operator of record for 14 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Sec Oil is the operator of record for 14 catalogued U.S. oil & gas wells in 1 state. 2 (14%) are active, 11 (79%) plugged & abandoned. Its largest concentration is in Illinois, with 14 wells (100% of its portfolio).
Wells operated
14
Active
2
Plugged
11
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 14 |
Well mix
- Oil wells
- 6
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 14%
Is this your company?
Claim Sec Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Sec Oil operate?
Sec Oil's catalogued wells are spread across 1 state: Illinois (14). Its 14 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 Sec Oil’s wells are active, plugged or orphaned?
14% of Sec Oil's catalogued wells are active, 15 percentage points below the national share of 29%. 79% are plugged & abandoned, against 47% nationally. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Sec Oil operate?
By product class, 6 (43%) 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 Brunner-Zwilling 1 in Richland, IL at 3,001 ft. The wells listed below sit in Richland (IL), Crawford (IL) and Lawrence (IL).
Notable wells operated by Sec Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Brunner-Zwilling 1 | 12-159-24237 | Plugged & abandoned | Other type | Richland, IL | S. E. C. Oil Co. | 3,001 ft |
| Schnieder A 1 | 12-159-24040 | Plugged & abandoned | Other type | Richland, IL | S. E. C. Oil Co. | 2,975 ft |
| Ernst, K. 1 | 12-159-23973 | Plugged & abandoned | Oil | Richland, IL | S. E. C. Oil Co. | 2,974 ft |
| Ernst G 2 | 12-159-24028 | Plugged & abandoned | Other type | Richland, IL | S. E. C. Oil Co. | 2,971 ft |
| Ernst, K. 2 | 12-159-24519 | Plugged & abandoned | Other type | Richland, IL | S. E. C. Oil Co. | 2,950 ft |
| Ernst, K. & H. 1 | 12-159-24321 | Plugged & abandoned | Other type | Richland, IL | S. E. C. Oil Co. | 2,930 ft |
| Ernst K 1 | 12-159-24306 | Active | Oil | Richland, IL | S. E. C. Oil Co. | 2,920 ft |
| Roney, F. 1 | 12-159-24458 | Plugged & abandoned | Oil | Richland, IL | S. E. C. Oil Co. | 2,914 ft |
| Ernst Glen 1 | 12-159-23961 | Plugged & abandoned | Other type | Richland, IL | S. E. C. Oil Co. | 2,914 ft |
| Hayes R T 1 | 12-159-24498 | Plugged & abandoned | Other type | Richland, IL | S. E. C. Oil Co. | 2,882 ft |
| Perkins - Landman 1 | 12-033-30666 | Other status | Oil | Crawford, IL | S. E. C. Oil Co. | 2,181 ft |
| Stoltz George J 1-A | 12-101-28478 | Plugged & abandoned | Oil | Lawrence, IL | S. E. C. Oil Co. | 2,013 ft |
Deepest first where depth is published. See all 14 wells →
Frequently asked questions
How many wells does Sec Oil operate?
Sec Oil is the operator of record for 14 catalogued oil & gas wells, with the largest concentration in Illinois (14). Only wells in states WellCensus has ingested are counted.
How many of Sec Oil's wells are still active?
2 of Sec Oil's catalogued wells are active; 11 are plugged & abandoned.
In which states does Sec Oil operate wells?
Sec Oil is the operator of record for wells in Illinois (14).
Does Sec Oil operate mostly oil or gas wells?
6 of Sec Oil's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Sec Oil's deepest well?
Among wells with a published depth, Brunner-Zwilling 1 in Richland, IL is the deepest at 3,001 ft.
Where Sec Oil'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, “Sec Oil — well portfolio”, https://wellcensus.com/operators/sec-oil-66382 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).