I think I'd agree with most others here, saying to stick with your apprenticeship. If the job market dries up here in Calgary, you can practice your trade up in Fort McMurray. I don't know if you want to do that, but from what I've read and heard, trades people up there make 6 figure salaries.
You could even keep a house here and still work up there - commuter buses come in and out of Fort Mac every weekend - 4 days in and 3 days back at home. That bus ride's gotta be a bear, but if you're young and have no obligations here - you might want to consider this option. I don't foresee the job market up there drying up - there so much development with the oil sands that those big companies will be active up there for quite a while.
Hey look, you are 2 cents richer...