Oil & gas wells in Mountrail County, ND
5,737 catalogued wells in Mountrail County, North Dakota, from the state regulator registry and the federal orphaned-well inventory.
Dataset updated . Derived from public data sources.
At a glance
Mountrail County, North Dakota has 5,737 catalogued oil & gas wells: 3,668 active (64%), 675 plugged & abandoned (12%) and 95 documented orphans. It ranks 3rd of the 32 North Dakota counties WellCensus profiles by well count and holds 13% of the state's 43,680 catalogued wells.
Catalogued wells
5,737
Active
3,668
Plugged
675
Documented orphans
95
What is the status of oil and gas wells in Mountrail County?
64% of Mountrail County's wells are active, 17 percentage points above the North Dakota share of 47%. 12% are plugged & abandoned, against 29% statewide and 47% nationally. 197 wells (3%) are shut-in — unplugged but idle. 95 wells (2%) are documented orphans with no operator able to plug them, compared with 1% across North Dakota and 4% nationally. The remaining 1,102 carry status codes outside those classes, such as permitted or cancelled locations.
What kinds of wells are in Mountrail County?
By product class, 5,524 of the county's wells (96%) are oil wells, 0 (0%) gas wells and 106 (2%) injection wells. Statewide the oil share is 92% and the gas share 0.9%. The deepest total depth published for a Mountrail County well is 31,140 ft, against 31,781 ft for North Dakota as a whole. 100% of the county's wells carry coordinates and appear on the map.
How does Mountrail County compare with other North Dakota counties?
Mountrail County has the 3rd-most catalogued wells of the 32 North Dakota counties with at least 25. The median North Dakota county on WellCensus has 57 wells. The largest, Mckenzie County, has 10,933. By documented orphans it ranks 2nd in North Dakota.
Who operates wells in Mountrail County?
194 distinct operators of record are linked to wells in Mountrail County. 100% of the county's wells carry a link to a canonical operator profile; the rest list no operator or a name not yet resolved. Each well's page names its operator where the state publishes one.
Wells in Mountrail County
🔒 Create a free account to export CSV| Well | API # / state ID | Status | Type | Operator |
|---|---|---|---|---|
| Tioga-Madison Unit K-141 | 33-061-00001 | Other status | Injection | Hess Bakken Investments Ii, LLC |
| George Neset 1 | 33-061-00002 | Plugged & abandoned | Oil | Concord Development Co. |
| Tioga-Madison Unit M-125 | 33-061-00003 | Plugged & abandoned | Oil | Hess Bakken Investments Ii, LLC |
| Tioga-Madison Unit M-143 | 33-061-00004 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit K-131 | 33-061-00005 | Plugged & abandoned | Oil | Hess Bakken Investments Ii, LLC |
| Tioga-Madison Unit M-139 | 33-061-00006 | Plugged & abandoned | Oil | Hess Bakken Investments Ii, LLC |
| Tioga-Madison Unit O-125 | 33-061-00007 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit N-144 | 33-061-00008 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit L-126 | 33-061-00009 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit L-130 | 33-061-00010 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit L-140 | 33-061-00011 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit K-139 | 33-061-00012 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit K-135 | 33-061-00013 | Plugged & abandoned | Oil | Hess Corporation |
| Richard Blestrud 1 | 33-061-00014 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit O-143hr | 33-061-00015 | Plugged & abandoned | Oil | Hess Bakken Investments Ii, LLC |
| Tioga-Madison Unit M-141 | 33-061-00016 | Plugged & abandoned | Oil | Hess Bakken Investments Ii, LLC |
| Tioga-Madison Unit K-127 | 33-061-00017 | Plugged & abandoned | Oil | Hess Corporation |
| Tioga-Madison Unit O-145 | 33-061-00018 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Clifford Rice 1 | 33-061-00019 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit M-145 | 33-061-00020 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit L-146 | 33-061-00021 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit N-124 | 33-061-00022 | Plugged & abandoned | Oil | Hess Bakken Investments Ii, LLC |
| Tioga-Madison Unit L-138 | 33-061-00023 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit K-145 | 33-061-00024 | Plugged & abandoned | Oil | Amerada Hess Corporation |
| Tioga-Madison Unit L-134 | 33-061-00025 | Plugged & abandoned | Oil | Amerada Hess Corporation |
A sample of the county’s wells — every catalogued well has its own page. Browse all 5,737 in search → (filter by operator, status and type, then export), or find a specific well on the live map.
Frequently asked questions
How many oil and gas wells are in Mountrail County, ND?
Mountrail County, North Dakota has 5,737 catalogued oil & gas wells: 3,668 active, 675 plugged and 95 documented orphans.
How many orphaned wells are in Mountrail County?
95 wells in Mountrail County, North Dakota are documented orphans — unplugged with no solvent operator of record, the 2nd-highest count among North Dakota counties.
What share of wells in Mountrail County are plugged?
675 of Mountrail County's 5,737 catalogued wells (12%) are plugged & abandoned, compared with 29% across North Dakota.
Which North Dakota county has the most oil and gas wells?
Mckenzie County has the most catalogued wells of any North Dakota county on WellCensus (10,933); Mountrail County ranks 3rd with 5,737.
How many companies operate wells in Mountrail County?
194 distinct operators of record are linked to catalogued wells in Mountrail County, North Dakota.
Nearby in the North Dakota rankings
About this data
Source: North Dakota DMR Oil & Gas Division well registry, plus the USGS United States Documented Orphaned Well Database (2026, doi 10.5066/P13FHBYG), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: WellCensus, “Oil & gas wells in Mountrail County, North Dakota”, https://wellcensus.com/wells/north-dakota/mountrail (data as of October 10, 2026).