How much burnt
While the fires burnt uncontrolled, February to April 1991.
605–732
wells
set on fire
4–6 million
barrels a day
of crude oil burnt
70–100 million
m³ a day
of natural gas burnt
46
wells
gushed instead of burning, 300,000–400,000 barrels a day between them
90%
of the fires
were put out with sea water alone
Numbers: Wikipedia, "Kuwaiti oil fires".