Environment Report 2019

ENVIRONMENT REPORT 2019

Figure 38 shows releases from these systems with the attributed cause of release, including two of the outlier oil releases in the period. Figure 38: Direct Cause by System/Equipment Type

450

Unspecified Operational Asset

400

350

300

250

200

150

Mass of Oil Released (Tonnes)

100

50

0

Drainage

Bulk Transfer

Hydraulics

Diesel

Production

Wells

Source: OPRED, May 2019; OGUK Once outliers are excluded, as shown in Figure 39, it is easier to see that the predominant direct cause varies across the systems/equipment categories, with operational integrity issues being a causal factor in the majority of releases from drainage and diesel systems, while asset integrity is identified as a causal factor in releases from wells, bulk transfer, hydraulics and production systems.

Figure 39: Direct Cause by System/Equipment Type (Excluding Outliers)

40

Operational Asset

35

30

25

20

15

Mass of Oil Released (Tonnes)

10

5

0

Drainage

Bulk Transfer

Hydraulics

Diesel

Production

Wells

Source: OPRED, May 2019; OGUK

50