Big Sioux Oil
Operator of record for 2 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Big Sioux Oil is the operator of record for 2 catalogued U.S. oil & gas wells in 1 state. None is listed as active, 2 (100%) are plugged & abandoned. Its largest concentration is in Wyoming, with 2 wells (100% of its portfolio).
Wells operated
2
Active
0
Plugged
2
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Wyoming | 2 |
Well mix
- Oil wells
- 2
- Gas wells
- 0
- Shut-in
- 0
- Active share
- 0%
Is this your company?
Claim Big Sioux Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Big Sioux Oil operate?
Big Sioux Oil's catalogued wells are spread across 1 state: Wyoming (2). Its 2 Wyoming wells are 0.0% of the 129,957 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 Big Sioux Oil’s wells are active, plugged or orphaned?
0% of Big Sioux Oil'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 Big Sioux Oil operate?
By product class, 2 (100%) 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 Spur Creek Unit 10-9 in Lincoln, WY at 3,300 ft. The wells listed below sit in Lincoln (WY) and Converse (WY).
Notable wells operated by Big Sioux Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Spur Creek Unit 10-9 | 49-023-20034 | Plugged & abandoned | Oil | Lincoln, WY | Big Sioux Oil Company | 3,300 ft |
| Le Bonte 1 | 49-009-05023 | Plugged & abandoned | Oil | Converse, WY | Big Sioux Oil Company | 2,741 ft |
Deepest first where depth is published. See all 2 wells →
Frequently asked questions
How many wells does Big Sioux Oil operate?
Big Sioux Oil is the operator of record for 2 catalogued oil & gas wells, with the largest concentration in Wyoming (2). Only wells in states WellCensus has ingested are counted.
How many of Big Sioux Oil's wells are still active?
0 of Big Sioux Oil's catalogued wells are active; 2 are plugged & abandoned.
In which states does Big Sioux Oil operate wells?
Big Sioux Oil is the operator of record for wells in Wyoming (2).
Does Big Sioux Oil operate mostly oil or gas wells?
2 of Big Sioux Oil's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Big Sioux Oil's deepest well?
Among wells with a published depth, Spur Creek Unit 10-9 in Lincoln, WY is the deepest at 3,300 ft.
Where Big Sioux 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, “Big Sioux Oil — well portfolio”, https://wellcensus.com/operators/big-sioux-oil-33490 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).