Alberta is not leaving Canada to form it's own state. It wouldn't be a viable country. If they did leave, it would probably be to become an American state, which isn't happening. There is no appetite for it.
OP is wrong, though, because if Alberta did leave, it would effectively mean the end of Canada as a coherent country. BC would be entirely hived off from the rest of Canada with no transit except through Alberta (again, this simply isn't going to happen). I don't think anyone in BC would enjoy that very much, especially when BC's own economy slows (ie, when BC finally get that really big real estate correction the talking heads have been promising since the 1990s).
Also, the level of disdain Canadians have been showing for each other post-election is disheartening. Albertan angst is driven by the sense that there are a large number of people, many of whom drive national policy in Canada, who either don't give a shit that Alberta has been struggling or are actually happy about the fact. On the other side, many people acting in good faith believe that Albertans don't care about the economic problems of the rest of Canada, don't view themselves as Canadian, and are being selfish and blind and not acting in good faith when they blame everything on the rest of Canada. This is a bigger problem than the economic dispute, although it gets expressed in economic terms.
What Alberta is going to do is to systematically hive itself from the rest of Canada in the same way Quebec has done: get rid of the mounties in favour of a provincial fource, institute a provincial pension plan, opt out of federal cost sharing programs, etc, as Kenney has suggested. If this happens, this is going to suck for everyone else in Canada, long term, as Alberta is significantly younger than the rest of the country and disproportionately pays into the pension system other provinces are drawing on (Quebec excepted). Alberta starting to go their own way and to decouple their finances from the rest of the country as much as possible will have deleterious effects on national unity.