Mix a spoon of oil in a couple of glasses of water, add salt, put it a few minutes in a blender, and tell me how easy it is to retrieve the oil.
Now scale that to millions of barrels of oil every day.
Now scale that to millions of barrels of oil every day.
2. Harvest.
In fact, a common further down in this thread says that's exactly how they harvest all of the oil: they pressurize it with (salt)water.