Hmmmmm difficult one that.
If a barrel = 40 Gallons.
And there's 8 pints in a Gallon
If it was beer it would be 1,639,040,000,000,000,000 Pints!
Which is roughly what I'll be drinking tomorrow night. So I'm guessing that it's F*cking loads!
Or if you want to look at it financially, 51.22 billion barrels less extraction etc costs if you take and offshore average of $12 a barrel (read that somewhere) sell the stuff at $37 a barrel to make the maths easier =
$1,280.50 Billion. Nice work if you can get it. ;-)