Environment Report 2017

ENVIRONMENT REPORT 2017

Analysis with Outlier Releases Removed Figure 30 shows the releases by source since 2010 without the outliers of the single large events. This shows a downward trend over the last four years, with a 37 per cent reduction in the mass of accidental oil releases since 2013. The main sources are production and bulk transfer systems. In 2016, the containment category includes releases that may have been counted under other categories in the past, as it identifies issues relating to overflow or incorrect release from systems that were otherwise sound.

Figure 30: Accidental Oil Release Mass by Source Excluding Outliers

350

10 15 20 25 30 35 40 45 50

Other*

300

Hydraulic Systems

Subsea Systems and Related Equipment Pipework Infrastructure

250

200

Containment

150

Bulk Transfer Systems

Number of Releases

100

Drainage Systems

Accidental Oil Release Mass Excluding Outliers (Tonnes)

50

0 5

Production Systems and Related Equipment Number of Releases

0

2010 2011 2012 2013 2014 2015 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 2017, Oil & Gas UK

48