How many oil and gas wells are in Montana?

Montana has 42,011 catalogued oil & gas wells on WellCensus: 9,758 active, 25,398 plugged & abandoned and 272 documented orphans.

How many orphaned wells does Montana have?

272 wells in Montana are documented orphans — unplugged with no solvent operator of record.

Eog Resources is the largest operator active in Montana by total catalogued wells (16,762 across 17 states).

42,011 catalogued wellbores in Montana, from the state regulator's registry plus the federal orphaned-well inventory.

Dataset updated October 2026 . Derived from public data sources.

Catalogued wells

42,011

Active

9,758

Plugged

25,398

Documented orphans

272

Largest oil & gas operators active in Montana
Operator	Wells	Active	Plugged	States
Eog Resources	16,762	2,897	4,127	AR CA CO KS LA MI MS MT ND NM NY OH OK PA UT WV WY
Scout Energy Management	12,456	9,882	1,040	CO KS MT ND NM OK UT
Noble Energy	10,764	1,646	6,368	CA CO IL KS LA MT NM OK PA UT WV WY
Texaco	10,522	267	9,120	AL AR CA CO IL KS KY LA MI MS MT ND NY OH OK PA UT
Citation Oil & Gas	9,922	7,334	1,384	CO IL KS LA MS MT ND NM OK UT WY
Marathon Oil	8,999	2,695	5,360	AR CA CO IL KS KY LA MI MS MT ND NM OK PA UT WV WY
Devon Energy Production	8,543	2,543	2,077	CO KS LA MI MT ND NM OH OK WY
Oxy USA	7,402	1,691	4,023	AR CA CO KS KY LA MI MS MT ND NM OK UT WV WY
Merit Energy	7,361	4,338	986	AR CA CO KS LA MI MT ND NM OK UT WY
Xto Energy	6,846	2,814	1,953	AR CO KS KY LA MT ND NM NY OH OK PA UT WV WY

Well counts are the operator’s national totals; state placeholder records are excluded. See methodology.

Deepest oil & gas wells in Montana
Well	API # / state ID	Status	Type	Location	Operator	Depth
State Line Federal 2759 14-26 2B	25-085-22085	Active	Oil	Roosevelt, MT	Oasis Petroleum North America LLC	31,810 ft
Felix 9-16-21-28 5H	25-085-22049	Active	Oil	Roosevelt, MT	Kraken Operating, LLC	30,302 ft
Felix 9-16-21-28 4H	25-085-22048	Active	Oil	Roosevelt, MT	Kraken Operating, LLC	30,293 ft
Nate 6-7-18-19 1H	25-083-23478	Active	Oil	Richland, MT	Kraken Operating, LLC	28,060 ft
Marvin 2-11-14-23 4H	25-083-23410	Active	Oil	Richland, MT	Kraken Operating, LLC	27,962 ft
Nate 6-7-18-19 4H	25-083-23481	Active	Oil	Richland, MT	Kraken Operating, LLC	27,940 ft
Nate 6-7-18-19 2H	25-083-23479	Active	Oil	Richland, MT	Kraken Operating, LLC	27,925 ft
Marvin 2-11-14-23 1H	25-083-23407	Active	Oil	Richland, MT	Kraken Operating, LLC	27,905 ft
Nate 6-7-18-19 3H	25-083-23480	Active	Oil	Richland, MT	Kraken Operating, LLC	27,870 ft
Marvin 2-11-14-23 3H	25-083-23409	Active	Oil	Richland, MT	Kraken Operating, LLC	27,830 ft

Counties with 25 or more catalogued wells.