Health, Safety and Environment Report 2020

Environment

Discharges – Produced Water

Figure 16: Produced Water Discharged

Figure 17: Dispersed Oil Discharged with Produced Water

250 250

2,000 2,000

Dispersed Oil Discharged with Produced Water

Dispersed Oil in Water Concentration Limit

Produced Water Discharged Produced Water Discharged

3,500

35

Average Dispersed Oil Concentration with GC-FID Method

1,800 1,800

Produced Water Re-injected Produced Water Re-injected

200 200

1,600 1,600

3,000

30

Production Production

1,400 1,400

2,500

25

150 150

1,200 1,200

2,000

20

1,000 1,000

800 800

100 100

1,500

15

Production (Million boe) Production (Million boe)

Produced Water (Million m³) Produced Water (Million m³)

600 600

1,000

10

400 400

50

Dispersed Oil in Water Concentration (mg/l)

50

Dispersed Oil Discharged with Produced Water (Tonnes)

500

5

200 200

0

0

0

0

0

0

2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019

2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019

Source: EEMS, May 2020

Source: EEMS, May 2020; OGA Source: EEMS, May 2020; OGA

The volume of produced water discharged to sea increased in 2019,

The UKCS industry reinjected more produced water than in previous years, with 33 per cent of the total produced going back to the reservoir

The concentration and the mass of dispersed oil discharged with produced water in 2019 increased compared to 2018, continuing a trend apparent over the preceding three years. The total mass increased by 5 per cent, from 2,182 tonnes to 2,296 tonnes and the concentration increased to 16.9 from 16.1 mg/l, remaining below the 30 mg/l threshold set by OSPAR

33%

up 0.32 per cent year on year

HEALTH, SAFETY AND ENVIRONMENT REPORT 2020

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