I think it's not GDP that's important, but net wealth creation. We have a huge GDP, but it's mostly wealth redistribution and consumption. While there are substantial benefits to trading among ourselves, that generates no wealth surplus to invest. Trading one form of wealth for another within our own economy leaves no surplus to be invested. Norway, by accident of geography coupled with hard work and sound government, has a net wealth surplus to invest. They simply consume less wealth than they produce.
Incidentally we have the available oil to match Norway. If we chose, we could easily become a net exporter of oil once again. However, since we've exhausted most of our cheaply recoverable oil, the fraction of recoverable wealth would be much smaller; it would take a LOT more oil to generate the same investable surplus. And the environmental damage from recovering that much oil, considering our appetite, would likely be considerable, if not intolerable.