Environment Report 2019

ENVIRONMENT REPORT 2019

Figure 35 below excludes the outliers for clarity. Asset integrity related releases are in the majority for all but one year in the period.

Figure 35: Accidental Release Breakdown by Direct Cause (Excluding Outliers)

60

Unspecified

Operational

Asset

50

40

30

20

Mass of Oil Released (Tonnes)

10

0

2011

2012

2013

2014

2015

2016

2017

2018

Source: OPRED, May 2019; OGUK

The following tables provide a breakdown of the oil releases over the period by the top ten systems and equipment categories. As can be seen, most of the systems and/or equipment types shown have both a high frequency of releases and relatively high masses of oil released. Utilities equipment such as ROVs and cranes have nearly 200 releases (97 and 98 respectively), but the mass release is on average 1.5kg. Six categories appear in the top ten by both mass and frequency of release over the period: drainage systems, bulk transfer systems, hydraulic systems, diesel systems, production systems and storage systems.

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