Big O
Operator of record for 48 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Big O is the operator of record for 48 catalogued U.S. oil & gas wells in 1 state. 23 (48%) are active, 22 (46%) plugged & abandoned. Its largest concentration is in Kansas, with 48 wells (100% of its portfolio).
Wells operated
48
Active
23
Plugged
22
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Kansas | 48 |
Well mix
- Oil wells
- 37
- Gas wells
- 0
- Shut-in
- 2
- Active share
- 48%
Is this your company?
Claim Big O to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Big O operate?
Big O's catalogued wells are spread across 1 state: Kansas (48). Its 48 Kansas wells are 0.0% of the 473,140 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 O’s wells are active, plugged or orphaned?
48% of Big O's catalogued wells are active, 19 percentage points above the national share of 29%. 46% are plugged & abandoned, against 47% nationally. 2 wells (4%) are shut-in — unplugged but idle. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Big O operate?
By product class, 37 (77%) 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 J. Neufeldt 9 in Harvey, KS at 4,371 ft. The wells listed below sit in Harvey (KS), Stafford (KS), Ness (KS), Pawnee (KS) and Barton (KS).
Notable wells operated by Big O
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| J. Neufeldt 9 | 15-079-20009 | Active | Injection | Harvey, KS | Big O | 4,371 ft |
| Curtis 1 | 15-185-20191 | Plugged & abandoned | Oil | Stafford, KS | Big O | 4,316 ft |
| McGaughey 1-15 | 15-135-23493 | Plugged & abandoned | Other type | Ness, KS | Big O | 4,275 ft |
| Curtis 3 | 15-185-20205 | Plugged & abandoned | Oil | Stafford, KS | Big O | 4,220 ft |
| Wilson 'A' 3 | 15-185-12316 | Plugged & abandoned | Injection | Stafford, KS | Big O | 4,032 ft |
| Nba 1-24 | 15-145-21358 | Plugged & abandoned | Oil | Pawnee, KS | Big O | 3,940 ft |
| Sims 1 | 15-145-21541 | Shut-in | Oil | Pawnee, KS | Big O | 3,864 ft |
| Smith 1-19 | 15-009-25224 | Plugged & abandoned | Other type | Barton, KS | Big O | 3,850 ft |
| Wilson 1 | 15-185-00851 | Plugged & abandoned | Oil | Stafford, KS | Big O | 3,775 ft |
| Clarence Froese 3 | 15-079-20065 | Plugged & abandoned | Injection | Harvey, KS | Big O | 3,775 ft |
| Henry Baier 1 | 15-185-11205 | Active | Oil | Stafford, KS | Big O | 3,761 ft |
| Schmidt, George 1 | 15-185-11203 | Plugged & abandoned | Oil | Stafford, KS | Big O | 3,720 ft |
Deepest first where depth is published. See all 48 wells →
Frequently asked questions
How many wells does Big O operate?
Big O is the operator of record for 48 catalogued oil & gas wells, with the largest concentration in Kansas (48). Only wells in states WellCensus has ingested are counted.
How many of Big O's wells are still active?
23 of Big O's catalogued wells are active; 22 are plugged & abandoned.
In which states does Big O operate wells?
Big O is the operator of record for wells in Kansas (48).
Does Big O operate mostly oil or gas wells?
37 of Big O's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Big O's deepest well?
Among wells with a published depth, J. Neufeldt 9 in Harvey, KS is the deepest at 4,371 ft.
Where Big O'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 O — well portfolio”, https://wellcensus.com/operators/big-o-75804 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).