Chieftain Oil
Operator of record for 281 catalogued wells across 2 states. Every well below links to its full registry page.
Filed as: CHIEFTAIN OIL CO INC · Chieftain Oil Co., Inc.
At a glance
Chieftain Oil is the operator of record for 281 catalogued U.S. oil & gas wells in 2 states. 190 (68%) are active, 59 (21%) plugged & abandoned. Its largest concentration is in Kansas, with 271 wells (96% of its portfolio).
Wells operated
281
Active
190
Plugged
59
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Kansas | 271 |
| Oklahoma | 10 |
Well mix
- Oil wells
- 223
- Gas wells
- 24
- Shut-in
- 30
- Active share
- 68%
Is this your company?
Claim Chieftain Oil to keep this portfolio accurate — verified operators can correct well statuses and add plugging documentation.
Claim your operator profileWhere does Chieftain Oil operate?
Chieftain Oil's catalogued wells are spread across 2 states: Kansas (271) and Oklahoma (10). Its 271 Kansas wells are 0.1% 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 Chieftain Oil’s wells are active, plugged or orphaned?
68% of Chieftain Oil's catalogued wells are active, 39 percentage points above the national share of 29%. 21% are plugged & abandoned, against 47% nationally. 30 wells (11%) are shut-in — unplugged but idle. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Chieftain Oil operate?
By product class, 223 (79%) are oil wells and 24 (9%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Lori 3510 4-2H in Barber, KS at 9,573 ft. 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 Chieftain Oil
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| Lori 3510 4-2H | 15-007-24005 | Active | Gas | Barber, KS | Chieftain Oil Co., Inc. | 9,573 ft |
| William 3510 4-11H | 15-007-23920 | Active | Gas | Barber, KS | Chieftain Oil Co., Inc. | 9,248 ft |
| Hammer SWD 3510 1-1 | 15-007-23936 | Active | Injection | Barber, KS | Chieftain Oil Co., Inc. | 6,673 ft |
| Stephanie 1-3 SWD | 15-007-23799 | Active | Injection | Barber, KS | Chieftain Oil Co., Inc. | 6,482 ft |
| Millie 'B' SWD 1 | 15-007-23887 | Active | Injection | Barber, KS | Chieftain Oil Co., Inc. | 6,470 ft |
| Molz Family SWD 1 | 15-007-24045 | Active | Injection | Barber, KS | Chieftain Oil Co., Inc. | 6,458 ft |
| Big Chief SWD 1 | 15-007-23658 | Active | Injection | Barber, KS | Chieftain Oil Co., Inc. | 6,320 ft |
| Blevins A SWD 1 | 15-007-24177 | Active | Injection | Barber, KS | Chieftain Oil Co., Inc. | 6,283 ft |
| Leysa SWD 1 | 15-007-23784 | Active | Injection | Barber, KS | Chieftain Oil Co., Inc. | 6,265 ft |
| Scotty SWD 1 | 15-007-23381 | Active | Injection | Barber, KS | Chieftain Oil Co., Inc. | 5,950 ft |
| Jimmie Mack SWD 1 | 15-007-23360 | Active | Injection | Barber, KS | Chieftain Oil Co., Inc. | 5,950 ft |
| Lake SWD 1 | 15-007-23781 | Active | Injection | Barber, KS | Chieftain Oil Co., Inc. | 5,755 ft |
Deepest first where depth is published. See all 281 wells →
Frequently asked questions
How many wells does Chieftain Oil operate?
Chieftain Oil is the operator of record for 281 catalogued oil & gas wells, with the largest concentration in Kansas (271). Only wells in states WellCensus has ingested are counted.
How many of Chieftain Oil's wells are still active?
190 of Chieftain Oil's catalogued wells are active; 59 are plugged & abandoned.
In which states does Chieftain Oil operate wells?
Chieftain Oil is the operator of record for wells in Kansas (271) and Oklahoma (10).
Does Chieftain Oil operate mostly oil or gas wells?
223 of Chieftain Oil's catalogued wells are oil wells and 24 are gas wells; the rest are injection, service or unclassified wells.
What is Chieftain Oil's deepest well?
Among wells with a published depth, Lori 3510 4-2H in Barber, KS is the deepest at 9,573 ft.
Where Chieftain 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, “Chieftain Oil — well portfolio”, https://wellcensus.com/operators/chieftain-oil-5172 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).