Environment Report 2015

The mean oil in produced water concentration across the industry in 2014 was 12.8 mg/l. Thirteen of the 27 reporting operators have an average annual concentration lower than this (see Figure 21), while 26 reported concentrations below the OSPAR recommended limit of 30 mg/l. Operator Z had an average oil in water value of 30.9 mg/l in 2014, which is higher than the OSPAR recommended annual limit. However, none of operator Z’s individual monthly samples were higher than 80 mg/l, therefore not exceeding the OSPAR recommended monthly limit.

1

2

Figure 21: Concentration of Oil in Produced Water for all Installations run by each Operator by main Hydrocarbon Type in 2014

3

Condensate

Gas

Oil

Limit = 30 mg/l

2014 Industry Mean

2013 Industry Mean

35

30

4

25

20

5

15

10

Oil in Produced Water (mg/l)

5

6

0

A B C D E F G H I

J K L M N O P Q* R S T U V W X Y Z

Operator rankings marked * are those for which one outlier in their dataset was anomalously high and therefore has been removed to reflect the general performance. DECC is aware of this outlier.

Source: EEMS June 2015

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