Presumably by studying geology, then thinking a lot about the oil formation process, and working out where to find some before anyone else. Then, you can negotiate to obtain value for your knowledge of the location...
That's a bit of a stretch dude. In our world it's easy to think in terms of intellectual capital, but look around you - every object you see was manufactured somewhere.
The knowledge economy wouldn't exist without physical objects to express it through, and they all have to be produced.