Historic scale and persistence of drill cuttings impacts on North Sea benthos

Lea-Anne Henry, Daniel Bernard Harries, Paul Frederick Kingston, J. Murray Roberts

Research output: Contribution to journalArticle

Abstract

Despite its long history of hydrocarbon exploitation, the United Kingdom lacks scientific protocols to monitor ecological impacts of drill cuttings (mixtures between rocky material excavated from wells and drilling mud). The present study used the UK Benthos industry database to apply standardised variance partitioning and measure the scale and persistence of these effects at 19 sites across the UK sector of the North Sea. Generally, effects were limited to within 1 km from the platform, but two platforms historically drilled with oil-based mud were impacted up to 1.2 km away. Impacts persisted for at least 6–8 years in the northern and central North Sea, but were undetectable in the south where cuttings piles do not accumulate. This study underpins new recommendations to implement regional, phase-based approaches to drill cuttings monitoring, and to apply a precautionary approach in considering decommissioning options that will minimise disturbance to cuttings piles.
Original languageEnglish
Pages (from-to)219-228
Number of pages10
JournalMarine Environmental Research
Volume129
Early online date31 May 2017
DOIs
Publication statusPublished - Aug 2017

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North Sea
Mandrillus
Hydrocarbons
Industry
Oils
Databases
United Kingdom

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Henry, Lea-Anne ; Harries, Daniel Bernard ; Kingston, Paul Frederick ; Roberts, J. Murray . / Historic scale and persistence of drill cuttings impacts on North Sea benthos. In: Marine Environmental Research. 2017 ; Vol. 129. pp. 219-228.
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Historic scale and persistence of drill cuttings impacts on North Sea benthos. / Henry, Lea-Anne; Harries, Daniel Bernard; Kingston, Paul Frederick; Roberts, J. Murray .

In: Marine Environmental Research, Vol. 129, 08.2017, p. 219-228.

Research output: Contribution to journalArticle

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