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6. Oil and Gas Properties (Details-Wells) - Wells
Sep. 30, 2015
Sep. 30, 2014
Productive oil wells, gross 341 231
Productive oil wells, net 10.88 7.36
North Dakota    
Productive oil wells, gross 336 230
Productive oil wells, net 10.51 7.28
Montana    
Productive oil wells, gross 5 1
Productive oil wells, net 0.37 .08