Environment Report 2016

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

1

2

50

350

Hydraulic Systems

45

3

300

Subsea Systems and Related Equipment Pipework Infrastructure

40

250

35

30

4

Containment

200

25

Bulk Transfer Systems

150

20

Mass (Tonnes)

5

Drainage Systems

Number of Releases

15

100

Production Systems and Related Equipment Other*

10

50

5

6

0

0

2010

2011

2012

2013

2014

2015

Number of Releases

*Other includes releases from firefighting systems, flare systems, deck washings and unidentified sheen, as well as those releases for which no source is identified

Source: BEIS July 2016

7

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.

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Figure 28: Accidental Oil Release Mass by Source in 2015

0.3 tonnes, 2%

0.3 tonnes, 2%

Production Systems and Related Equipment Production Systems and Rel t Equipment

0.5 tonnes, 3%

0.5 tonnes, 3%

0.05 tonnes, 0.3%

0.05 tonnes, 0.3%

1.1 tonnes, 7%

1.1 tonnes, 7%

Bulk Transfer Systems Bulk Transfer Systems

8.6 tonnes, 52%

8.6 tonnes, 52%

1.3 tonnes, 8%

1.3 tonnes, 8%

Hydraulic Systems Hydraulic Systems

Other*

Other*

Drainage Systems

Drainage Systems

1.7 tonnes, 10%

1.7 tonnes, 10%

Subsea Systems and Related Equipment Subsea Systems and Related Equipment Pipework Infrastructure

3.0 tonnes, 18%

Pipework Infrastructure

3.0 tonnes, 18%

Containers

*Other includes releases from firefighting systems, flare systems, deck washings and unidentified sheen, as well as those releases for which no source is identified

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

Source: BEIS July 2016

43