Casper, WY – Several states in the Rocky Mountain region are enjoying modest increases in oil production. This year, Colorado is on pace to take 7.4% more oil out of the ground when compared to 2002. Montana and North Dakota also are experiencing similar production spikes. But Wyoming Oil and Gas Conservation Commission Director Don Likwartz says increased production isn't the case in Wyoming. He says the main reason is that Wyoming's oil fields are old. Likwartz says 12 of the top 25 field in the state have been around for 75 year. But he believes enhanced oil recovery methods could significantly extend the life of oil fields.