In August 2014, the Government Pension Fund controlled assets were valued at approximately US$884 billion (equal to US$173,000 per capita) which is about 174% of Norway's current GDP. It is the largest sovereign wealth fund in the worldhttps://en.wikipedia.org/wiki/Government_Pension_Fund_of_Nor...
An effect, from the same charts, which partially mitigates what you're highlighting is that Norway has a totally different balance of exports versus imports:
Canada: Imports $437 B Exports $438 B
Norway: Imports $92 B Exports $147 B
http://atlas.media.mit.edu/en/profile/country/nor/#Exports
Edit: yeah Norway is definitely going to go to the shatter unless they invest in high tech right now. Compare this with Canada for example.
http://atlas.media.mit.edu/en/profile/country/can/#Exports
Nor: >50% of exports are crude and petroleum based products Can: ~25% of exports are crude and petroleum based products