Environment Report 2017

ENVIRONMENT REPORT 2017

4.1 Oil in Produced Water The mean concentration across industry of oil discharged to sea in produced water decreased by over 10 per cent from 14.9 mg/l in 2015 to 13.3 mg/l in 2016. This remains well below OSPAR’s recommended limit of 30 mg/l. Average oil-in-water concentrations for individual operators are the result of several factors. Those operators with higher values may have more assets or greater production totals. The operator benchmarking illustrated in Figure 22 below therefore provides a general picture of industry oil-in-water performance, but cannot be interpreted as some operators performing better than others.

Figure 22: Concentration of Oil in Produced Water for each Operator by Hydrocarbon Type, 2016

Oil

Gas

Condensate

Industry Average 2016

Industry Average 2015

Limit = 30 mg/l

35

30

)l/gm( retaW decudorP ni liO

25

20

15

10

5

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

Source: EEMS July 2017

38