Silurian Oil
Operator of record for 105 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: SILURIAN OIL CO., INC. · Silurian Oil Co.
At a glance
Silurian Oil is the operator of record for 105 catalogued U.S. oil & gas wells in 2 states. 35 (33%) are active, 52 (50%) plugged & abandoned. Its largest concentration is in Illinois, with 103 wells (98% of its portfolio).
Wells operated
105
Active
35
Plugged
52
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 103 |
| Louisiana | 2 |
Well mix
- Oil wells
- 70
- Gas wells
- 3
- Shut-in
- 6
- Active share
- 33%
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Claim your operator profileWhere does Silurian Oil operate?
Silurian Oil's catalogued wells are spread across 2 states: Illinois (103) and Louisiana (2). Its 103 Illinois wells are 0.1% 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 Silurian Oil’s wells are active, plugged or orphaned?
33% of Silurian Oil's catalogued wells are active, 4 percentage points above the national share of 29%. 50% are plugged & abandoned, against 47% nationally. 6 wells (6%) are shut-in — unplugged but idle. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Silurian Oil operate?
By product class, 70 (67%) are oil wells and 3 (3%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Guillory Haas Est 001 in Evangeline, LA at 9,796 ft. The wells listed below sit in Evangeline (LA), St Landry (LA), Wayne (IL), White (IL) and Lawrence (IL). State filings spell the name 2 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.
Notable wells operated by Silurian Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Guillory Haas Est 001 | 17-039-00528 | Plugged & abandoned | Gas | Evangeline, LA | Silurian Oil Co., Inc. | 9,796 ft |
| Perkins Cormier 001-D | 17-097-00293 | Plugged & abandoned | Oil | St Landry, LA | Silurian Oil Co., Inc. | 6,500 ft |
| Hines Ersil 2 | 12-191-28904 | Plugged & abandoned | Oil | Wayne, IL | Silurian Oil Co. | 3,536 ft |
| Boultinghouse 1-A | 12-193-00541 | Plugged & abandoned | Other type | White, IL | Silurian Oil Co. | 3,095 ft |
| Hardacre 1 | 12-101-08036 | Shut-in | Other type | Lawrence, IL | Silurian Oil Co. | 1,994 ft |
| Tanguary T 3 | 12-101-04483 | Plugged & abandoned | Other type | Lawrence, IL | Silurian Oil Co. | 1,935 ft |
| Tanguary T 1 | 12-101-04481 | Plugged & abandoned | Other type | Lawrence, IL | Silurian Oil Co. | 1,919 ft |
| Whittaker D 1 | 12-101-00218 | Other status | Other type | Lawrence, IL | Silurian Oil Co. | 1,907 ft |
| Hinkle, H.D. 18 | 12-101-27602 | Active | Oil | Lawrence, IL | Silurian Oil Co. | 1,871 ft |
| Tanguary, T 2 | 12-101-04482 | Active | Oil | Lawrence, IL | Silurian Oil Co. | 1,869 ft |
| Bowers & Ross 18 | 12-101-04495 | Plugged & abandoned | Oil | Lawrence, IL | Silurian Oil Co. | 1,860 ft |
| Crump 9 | 12-101-04672 | Active | Oil | Lawrence, IL | Silurian Oil Co. | 1,860 ft |
Deepest first where depth is published. See all 105 wells →
Frequently asked questions
How many wells does Silurian Oil operate?
Silurian Oil is the operator of record for 105 catalogued oil & gas wells, with the largest concentration in Illinois (103). Only wells in states WellCensus has ingested are counted.
How many of Silurian Oil's wells are still active?
35 of Silurian Oil's catalogued wells are active; 52 are plugged & abandoned.
In which states does Silurian Oil operate wells?
Silurian Oil is the operator of record for wells in Illinois (103) and Louisiana (2).
Does Silurian Oil operate mostly oil or gas wells?
70 of Silurian Oil's catalogued wells are oil wells and 3 are gas wells; the rest are injection, service or unclassified wells.
What is Silurian Oil's deepest well?
Among wells with a published depth, Guillory Haas Est 001 in Evangeline, LA is the deepest at 9,796 ft.
Where Silurian 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, “Silurian Oil — well portfolio”, https://wellcensus.com/operators/silurian-oil-78389 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).