This seems true for most modern, western economies: they are migrating from a producing economy to a service & knowledge economy. Logistics is big (moving stuff) and services are big (consultancy, lawfirms, etc), but the actual factories are gone. And that makes sense: with higher education levels you can make more complex things than the "regular" factories do. Stuff that requires trained staff - brains.

Oh - and btw: the US likely not only refines most oil, it also consumes it: the US have grown to a country based on consumption, spending and borrowing, but not on producing anything. So if goods only come in and money only goes out, there comes a time where the money is gone. And that is when the trouble starts...