43 / 60
43
Figure 27 shows the sources of the releases over the last six years when the single large events have been removed.
There has been a 36 per cent reduction in themass of accidental oil releases from2011 to 2015. With the exception of
“other”, production systems and bulk transfer systems are shown to have contributed the majority of accidental spills
over the six years. However, beyond this there is little trend, which reflects the unplanned nature of such releases.
Figure 27: Accidental Oil Release Mass by Source excluding Outliers
0
50
100
150
200
250
300
350
0
5
10
15
20
25
30
35
40
45
50
2010
2011
2012
2013
2014
2015
Number of Releases
Mass (Tonnes)
Hydraulic Systems
Subsea Systems
and Related
Equipment
Pipework
Infrastructure
Containment
Bulk Transfer
Systems
Drainage Systems
Production Systems
and Related
Equipment
Other*
Number of
Releases
Source: BEIS July 2016
*Other includes releases from firefighting systems, flare systems, deck washings and
unidentified sheen, as well as those releases for which no source is identified
Figure 28 shows a more detailed breakdown of release source for 2015. This shows that the largest contributor,
as in previous years, is production systems and related equipment. There are 58 releases from 20 operators that
fall into this category, averaging 0.15 tonnes. Four of these came from mobile platforms with the remainder from
fixed ones.
Figure 28: Accidental Oil Release Mass by Source in 2015
8.6 tonnes, 52%
3.0 tonnes, 18%
1.7 tonnes, 10%
1.3 tonnes, 8%
1.1 tonnes, 7%
0.5 tonnes, 3%
0.3 tonnes, 2%
0.05 tonnes, 0.3%
Production Systems and Related
Equipment
Bulk Transfer Systems
Hydraulic Systems
Other*
Drainage Systems
Subsea Systems and Related
Equipment
Pipework Infrastructure
Containers
Source: BEIS July 2016
*Other includes releases from firefighting systems, flare systems, deck washings and
unidentified sheen, as well as those releases for which no source is identified
1
2
3
4
5
6
7
8.6 tonnes, 52%
3.0 tonnes, 18%
1.7 tonnes, 10%
1.3 tonnes, 8%
1.1 tonnes, 7%
0.5 tonnes, 3%
0.3 tonnes, 2%
0.05 tonnes, 0.3%
Production Systems and Rel t
Equipment
Bulk Transfer Systems
Hydraulic Systems
Other*
Drainage Systems
Subsea Systems and Related
Equipment
Pipework Infrastructure
Containers
Source: BEIS July 2016
*Other includes releases from firefighting systems, flare systems, deck washings and
unidentified sheen, as well as those releases for which no source is identified
8