Who buys the oil after it has been drilled up by natural resource companies ?

after the oil is extracted from the ground where does it go?Who buys the oil after it has been drilled up by natural resource companies ?
It goes to the refineries (PDVSA, GAZPROM, etc) and then it usually goes to trading companies or entities that actually need the project. A lot of hedge funds are purchasing nowadays as well.Who buys the oil after it has been drilled up by natural resource companies ?
To the refineries, then to the gas stations.