Madison County, Montana Wells Summary
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Total wells
Most recent drilling
First on record
Activity status
Madison County contains 12 wells on file, with top operators including Helis, Estate Of William G., A Partnership and Madison Oil Co.
Most recent well on record: JS GRANGER A 1, operated by Texaco Oils Inc., A Delaware Corp. — last updated December 1984.
Active drilling rigs · Baker Hughes snapshot, week of 2026-05-29
By basin
- 2 Williston
Drilling for
- 2 Oil
Madison 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.
12 wells plotted ·
0 active in last 60 days
Basemap © OpenStreetMap contributors · well data © Oil and Gas Information · tiles served by DynamoMap
Top Operators in Madison County by total wells
Operators: Helis, Estate Of William G., A Partnership, Madison Oil Co, North American Resources Company, O'keefe Drilling Company, Poynter, Sam, Ruby Oil Company, Tenneco Oil Company, Cooper, W.o., Texaco Oils Inc., A Delaware Corp., Encana Oil & Gas (Usa) Inc..
Top Counties in Montana most active by total wells
Compare Madison against the other busiest counties in Montana:
Recent wells
| Well Name | Last activity | Updates | Operator | API |
|---|---|---|---|---|
| JS GRANGER A 1 | 1984-12-21 | Texaco Oils Inc., A Delaware Corp. | 25057210080000 | |
| BOOMHAUER 1-27 | 1984-07-08 | Helis, Estate Of William G., A Partnership | 25057210070000 | |
| Conley Ranch 1-27 | 1984-05-11 | Helis, Estate Of William G., A Partnership | 25057210040000 | |
| State 3-8 | 1982-07-31 | North American Resources Company | 25057210060000 | |
| State 7-23 | 1982-03-27 | EnCana Oil & Gas (USA) Inc. | 25057210030000 | |
| Huey Turner 1 | 1973-08-30 | O'Keefe Drilling Company | 25057210020000 | |
| Nyhart 1 | 1970-10-19 | Cooper, W.O. | 25057070000000 | |
| Kountz Comp. 1 | 1969-07-30 | Tenneco Oil Company | 25057210010000 | |
| Bayers 1-B | 1954-09-28 | Madison Oil Co | 25057600030000 | |
| Bayers 1-A | 1953-05-14 | Madison Oil Co | 25057600040000 |
Surface Ownership Records:
