Calstar Petroleum
Operator of record for 134 catalogued wells across 3 states. Every well below links to its full registry page.
Filed as: CALSTAR PETROLEUM · CALSTAR PETROLEUM CO · Calstar Petroleum Co. · Calstar Petroleum Company
At a glance
Calstar Petroleum is the operator of record for 134 catalogued U.S. oil & gas wells in 3 states. 32 (24%) are active, 88 (66%) plugged & abandoned and 2 flagged as orphaned. Its largest concentration is in Kentucky, with 62 wells (46% of its portfolio).
Wells operated
134
Active
32
Plugged
88
Orphaned
2
Portfolio by state
| State | Wells |
|---|---|
| Kentucky | 62 |
| Illinois | 58 |
| California | 14 |
Well mix
- Oil wells
- 68
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 24%
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Claim your operator profileWhere does Calstar Petroleum operate?
Calstar Petroleum's catalogued wells are spread across 3 states: Kentucky (62), Illinois (58) and California (14). Its 58 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 Calstar Petroleum’s wells are active, plugged or orphaned?
24% of Calstar Petroleum's catalogued wells are active, 5 percentage points below the national share of 29%. 66% are plugged & abandoned, against 47% nationally. 2 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.
What kinds of wells does Calstar Petroleum operate?
By product class, 68 (51%) 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 Stephens Fred 2 in Hamilton, IL at 3,521 ft. The wells listed below sit in Hamilton (IL), Edwards (IL), Wayne (IL) and Richland (IL). 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 Calstar Petroleum
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Stephens Fred 2 | 12-065-01016 | Plugged & abandoned | Other type | Hamilton, IL | Calstar Petroleum Company | 3,521 ft |
| Stephens Fred 1 | 12-065-00811 | Plugged & abandoned | Other type | Hamilton, IL | Calstar Petroleum Company | 3,520 ft |
| Stephens Wm B 3 | 12-065-01204 | Plugged & abandoned | Other type | Hamilton, IL | Calstar Petroleum Company | 3,510 ft |
| Shelton 1 | 12-065-00897 | Plugged & abandoned | Other type | Hamilton, IL | Calstar Petroleum Company | 3,480 ft |
| Cox James et al 1 | 12-065-02570 | Plugged & abandoned | Other type | Hamilton, IL | Calstar Petroleum Company | 3,360 ft |
| Sheraden Comm 1 | 12-047-00286 | Plugged & abandoned | Other type | Edwards, IL | Calstar Petroleum Company | 3,340 ft |
| Knight, D H 4 | 12-065-01649 | Plugged & abandoned | Oil | Hamilton, IL | Calstar Petroleum Company | 3,316 ft |
| Tickner C 1 | 12-191-01132 | Active | Oil | Wayne, IL | Calstar Petroleum Company | 3,277 ft |
| Knight D H 2 | 12-065-02233 | Active | Oil | Hamilton, IL | Calstar Petroleum Company | 3,259 ft |
| Martin E A 1 | 12-159-01055 | Plugged & abandoned | Other type | Richland, IL | Calstar Petroleum Company | 3,237 ft |
| Hunt Frances 1 | 12-065-02616 | Plugged & abandoned | Oil | Hamilton, IL | Calstar Petroleum Company | 3,191 ft |
| Hughes 2 | 12-065-02576 | Plugged & abandoned | Oil | Hamilton, IL | Calstar Petroleum Company | 3,190 ft |
Deepest first where depth is published. See all 134 wells →
Frequently asked questions
How many wells does Calstar Petroleum operate?
Calstar Petroleum is the operator of record for 134 catalogued oil & gas wells, with the largest concentration in Kentucky (62). Only wells in states WellCensus has ingested are counted.
How many of Calstar Petroleum's wells are still active?
32 of Calstar Petroleum's catalogued wells are active; 88 are plugged & abandoned and 2 are flagged as orphaned.
In which states does Calstar Petroleum operate wells?
Calstar Petroleum is the operator of record for wells in Kentucky (62), Illinois (58) and California (14).
Does Calstar Petroleum operate mostly oil or gas wells?
68 of Calstar Petroleum's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Calstar Petroleum's deepest well?
Among wells with a published depth, Stephens Fred 2 in Hamilton, IL is the deepest at 3,521 ft.
Where Calstar Petroleum'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, “Calstar Petroleum — well portfolio”, https://wellcensus.com/operators/calstar-petroleum-7223 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).