The Montana Board of Oil and Gas Conservation (Billings) is the regulator of record for every oil and gas well in Montana, and its website is where the public record lives: permits, well files, status changes, production and spacing orders. It is thorough. It is also organised for regulators and operators, not for the person holding a check stub, so here is the map.
Every Montana well carries an API number beginning 25-: 25 is the state, the next three digits are the county and the last five identify the well. Operators print it on stubs and division orders. If you have it, every page of the MBOGC online well data (search by API or well name) and the Board's weekly letters will take it. If you only have a well name, search by name and county, but be ready for several wells that share a name across different sections.
Three things you will want that a single well page can't give you: which wells drain your tract (that lives in spacing orders, cross-referenced by section), who owns the minerals (clerk and recorder, and the BLM for federal), and what the area is doing — recent spuds, rigs on location, permits filed around you. Each of those is on the site somewhere; pulling them together for one section is the work.
Oilstats.us loads the same public files — the well file, the production history and the spacing orders — and draws them on one map with your own tracts on top, for Montana and the four states around it. Click a section and you see every well, its status, production trend and unit; type a name or API and it takes you there. The regulator's record stays the authority; the map is the way to read it in seconds.
Operators report monthly and the public numbers generally trail the production month by two to three months. Our map shows the reporting cut-off on every well card.
Yes, in the well's document list once the operator files it. Our map draws the surface-to-bottom-hole path for every horizontal well from the public location data so you can see which sections the lateral crosses without opening the survey.
MBOGC's own GIS viewer is free and authoritative. Oilstats.us adds production trends, spacing units, lease and federal-mineral layers and your own tracts on one map, with a 7-day free trial.