Most of the OPEC countries seem to have budgeted with the expectation that oil prices would be up over $70US/bbl or higher. If the price of crude oil remains where it is, down under $50/bbl, these countries will have massive budgetary deficits. And so, btw, will Alberta (and Canada)
Furthermore, those of us in the rest of Canada, hoping for continued redistribution from Alberta via "equalization" payments will likely be disappointed and find our own provincial budgets facing greater shortfalls so long as oil prices remain low.