Slawson Exploration

Operator of record for 1,203 catalogued wells across 6 states. Every well below links to its full registry page.

Filed as: SLAWSON EXPLORATION CO INC · SLAWSON EXPLORATION COMPANY INC · SLAWSON EXPLORATION COMPANY, INC. · Slawson Exploration Company Inc · …

At a glance

Slawson Exploration is the operator of record for 1,203 catalogued U.S. oil & gas wells in 6 states. 557 (46%) are active, 396 (33%) plugged & abandoned and 2 flagged as orphaned. Its largest concentration is in North Dakota, with 780 wells (65% of its portfolio).

Wells operated

1,203

Active

557

Plugged

396

Orphaned

Portfolio by state

State	Wells
North Dakota	780
Kansas	108
Wyoming	108
Montana	94
Oklahoma	72
Colorado	41

Well mix

Oil wells: 963
Gas wells: 28
Shut-in: 12
Active share: 46%

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Where does Slawson Exploration operate?

Slawson Exploration's catalogued wells are spread across 6 states: North Dakota (780), Kansas (108), Wyoming (108), Montana (94) and Oklahoma (72) and 1 more. Its 780 North Dakota wells are 2% of the 43,680 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 Slawson Exploration’s wells are active, plugged or orphaned?

46% of Slawson Exploration's catalogued wells are active, 17 percentage points above the national share of 29%. 33% are plugged & abandoned, against 47% nationally. 12 wells (1.0%) are shut-in — unplugged but idle. 2 wells filed under this name are flagged as orphaned — unplugged, with no operator able to plug them.

What kinds of wells does Slawson Exploration operate?

By product class, 963 (80%) are oil wells and 28 (2%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is Periscope Federal 9-10-7tfh in Mountrail, ND at 28,207 ft. The wells listed below sit in Mountrail (ND) and Mckenzie (ND). State filings spell the name 5 ways; WellCensus merges exact-normalized spellings only, so subsidiaries and affiliates keep their own pages.

Notable wells operated by Slawson Exploration

Wells operated by Slawson Exploration
Well	API # / state ID	Status	Type	Location	Operator	Depth
Periscope Federal 9-10-7tfh	33-061-04493	Active	Oil	Mountrail, ND	Slawson Exploration Company, Inc.	28,207 ft
Submariner Federal 2-23-20h	33-061-03892	Active	Oil	Mountrail, ND	Slawson Exploration Company, Inc.	28,186 ft
Periscope Federal 5-10-7tfh	33-061-04489	Active	Oil	Mountrail, ND	Slawson Exploration Company, Inc.	28,160 ft
Periscope Federal 4-10-7tfh	33-061-04492	Active	Oil	Mountrail, ND	Slawson Exploration Company, Inc.	28,160 ft
Submariner Federal 7-23-20tfh	33-061-03893	Active	Oil	Mountrail, ND	Slawson Exploration Company, Inc.	27,716 ft
Submariner Federal 5-23-20tfh	33-061-03769	Active	Oil	Mountrail, ND	Slawson Exploration Company, Inc.	27,665 ft
Submariner Federal 6-23-20tfh	33-061-03767	Active	Oil	Mountrail, ND	Slawson Exploration Company, Inc.	27,537 ft
Submariner Federal 3-23-20h	33-061-03768	Active	Oil	Mountrail, ND	Slawson Exploration Company, Inc.	27,448 ft
Submariner Federal 2 Slh	33-061-03894	Active	Oil	Mountrail, ND	Slawson Exploration Company, Inc.	27,332 ft
Daredevil Federal 4-2-14H	33-053-10394	Active	Oil	Mckenzie, ND	Slawson Exploration Company, Inc.	26,830 ft
Daredevil Federal 1-2-14H	33-053-10392	Active	Oil	Mckenzie, ND	Slawson Exploration Company, Inc.	26,800 ft
Barnstormer Federal 2-3-15H	33-053-09996	Active	Oil	Mckenzie, ND	Slawson Exploration Company, Inc.	26,797 ft

Deepest first where depth is published. See all 1,203 wells →

Frequently asked questions

How many wells does Slawson Exploration operate?

Slawson Exploration is the operator of record for 1,203 catalogued oil & gas wells, with the largest concentration in North Dakota (780). Only wells in states WellCensus has ingested are counted.

How many of Slawson Exploration's wells are still active?

557 of Slawson Exploration's catalogued wells are active; 396 are plugged & abandoned and 2 are flagged as orphaned.

In which states does Slawson Exploration operate wells?

Slawson Exploration is the operator of record for wells in North Dakota (780), Kansas (108), Wyoming (108), Montana (94), Oklahoma (72) and Colorado (41).

Does Slawson Exploration operate mostly oil or gas wells?

963 of Slawson Exploration's catalogued wells are oil wells and 28 are gas wells; the rest are injection, service or unclassified wells.

What is Slawson Exploration's deepest well?

Among wells with a published depth, Periscope Federal 9-10-7tfh in Mountrail, ND is the deepest at 28,207 ft.

Where Slawson Exploration'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, “Slawson Exploration — well portfolio”, https://wellcensus.com/operators/slawson-exploration-662 (data as of October 10, 2026).

Dataset updated October 2026 . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).