Look at it this way. The US refines about 15.7 million barrels of oil per day. Do you believe that single process is consuming 29 billion gallons of water a day? That California oil refining consumes 1.2 Trillion gallons of water a year?
The USGS
http://pubs.usgs.gov/circ/2004/circ1268/index.html
estimated TOTAL self-supplied industrial use for whole of USA at 20 billion gallons/day in 2000.
Very interesting USGS site, BTW.
I would venture to guess that the water figures conveyed by the site are cradle to grave numbers, drilling, tranport, refining, etc., most of the water used in those processes are recovered so actual consumption is less.