Petroleum County, Montana Wells Summary
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Total wells
Most recent drilling
First on record
Activity status
Petroleum County contains 706 wells on file, with top operators including Cenex, Inc. and Cat Creek Holdings LLC.
Wells in Petroleum span several oil & gas fields including Cat Creek and Rattlesnake Butte.
Most recent well on record: Unit #2 38, operated by Cenex, Inc. — last updated March 2026.
Active drilling rigs · Baker Hughes snapshot, week of 2026-07-02
By basin
- 3 Williston
Drilling for
- 3 Oil
Petroleum County well density
Every dot is one well — small blue dots are historic wells;
larger orange dots are wells with activity in the last 60 days.
706 wells plotted ·
0 active in last 60 days
Basemap © OpenStreetMap contributors · well data © Oil and Gas Information · tiles served by DynamoMap
Top Operators in Petroleum County by total wells
Operators: Cenex, Inc., Cat Creek Holdings Llc, Continental Oil Company, Conoco Inc., Mid-Northern Oil Co., Frantz Corporation, Taylor, Ike, Carnell, Millicent C., Central Montana Resources, Llc, Minnesota Flatwillow Petroleum Corp..
Top Oil & Gas Fields intersecting Petroleum County
Fields: Cat Creek, Rattlesnake Butte, Wildcat Petroleum, Rattle Snake Butte (Heath), Yellow Water (Heath), Brush Creek, Kootenai, Mcdonald Creek.
Top Counties in Montana most active by total wells
Compare Petroleum against the other busiest counties in Montana:
Recent wells
| Well Name | Last activity | Updates | Operator | API |
|---|---|---|---|---|
| Unit #2 38 | 2026-03-18 | Cenex, Inc. | 25069602150000 | |
| Laverdure 1 (1-A) | 2026-03-18 | Mid-Northern Oil Co. | 25069601630000 | |
| CHARLES 3-A | 2026-03-18 | Dunlap, W.F. | 25069065710000 | |
| J.W. Clayton etal 1 | 2026-03-18 | Snook Etal | 25069051150000 | |
| Fee 1 | 2023-11-01 | Columbia Petroleum, Ltd. | 25069052310000 | |
| Snowmane 4 | 2018-08-10 | Flat Willow Farm, LLC | 25069211820000 | |
| Snowmane 2 | 2018-08-05 | Flat Willow Farm, LLC | 25069211800000 | |
| Snowmane 6 | 2012-12-27 | Central Montana Resources, LLC | 25069211850000 | |
| Yellow Water 1 | 2012-04-20 | Central Montana Resources, LLC | 25069211860000 | |
| Snowmane 5 | 2012-01-12 | Central Montana Resources, LLC | 25069211840000 |
Surface Ownership Records:
