.It sounds like a lot of oil, and there are quite a few comparisons on the web, but I think this puts it into perspective:
184 million gallons
= 24.6 million cubic feet
= a cube measuring less than 300 feet on a side.
Or another way to look at:
If you own a home in a small suburban development, and have a lot size of 100 feet square, and you place a cube on it, filling it to the edges, it would take 27 such housing lots to hold all the oil that has been released.
Heck, we could store the whole spill in my little neighborhood.