Risk of Oil Spills10 Dec 2020 12:32
I'm just taking a browse through the 2655 page EA produced for the P1 well. Some notable figures on the chance of spills, page 1229:
".7.1.1 Leaks and Spills (including Blowouts)
In the North Sea (UK and Norwegian waters) and US Gulf of Mexico Outer Continental Shelf (US GoM OCS), there have
been a total of 292 blowouts between 1980 and 2014 (Table 5) (SINTEF, 2014). 31.5% of these (92) occurred during
exploration drilling. The frequency of loss of well control incidents in North Sea and US GoM OCS during drilling between
1980 and 2011 is 3.31 incidents per 1,000 wells drilled, or 0.331% chance (Table 6).
The number of all spills (any kind of substances, such as fuel, chemicals or drilling fluids) from platforms (not only blowouts)
by volume in the US GoM OCS between 1964 and 2013 are provided inTable 7. As noted in the table, only 0.77% of all spills
were over 1,000 barrels (bbl), and 79.5% of the spills were between 1 and 9 bbl. Causal factors, small spills frequency
compared to loss of well control events, and effects of hurricanes on spill frequencies are shown in Figure 6 to Figure 11.
Spill frequencies decreased rapidly in the 1970s and 1980s as equipment failure rates decreased. There have only been 17
spill events over 1,000 bbl in US GoM OCS between 1964 and 2015, of which six were as a result of hurricanes. Only two
events have resulted in such spills since 1980: hurricane Rita in 2005 (resulted in 3 spills over 1,000 bbl) and Deep water
Horizon in 2010"
This puts into perspective just what a freak incident the Deep water Horizon was.