What is difference between barnett shale gas and propane and crude oil?

The "Barnett Shale" is a particular shale formation found in central North Texas, and Southern Ok, that can produce natural gas. The natural gas is the same gas found in any other formation only extracted a little differently. Propane would be refined from natural gas, with no regard as to where it came from. Crude oil, meaning oil extracted directly from the ground in it's natural state, is unrefined and can be full of impurities, water, etc., thus crude.