Methane Emissions from North Sea Oil Drilling Raise Climate Concerns

Recent research by the National Centre for Atmospheric Science (NCAS) has revealed significant unreported methane emissions from oil tankers operating in the North Sea. This finding suggests that the oil and gas sector may be contributing more to greenhouse gas pollution than previously acknowledged. Methane, a greenhouse gas with a potency far exceeding that of carbon dioxide, is emitted during the transportation of oil from remote drilling sites to shore, particularly through the use of shuttle tankers. The shift from traditional pipeline transport to tankers has raised concerns about the environmental impact of these operations.

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The NCAS study indicates that emissions from floating storage sites could add between 5% and 47% to the total methane emissions reported by the UK government. The research utilized advanced technology, including a research aircraft and methane-sensing drones, to detect spikes in methane emissions that were not captured in official data. It is estimated that one floating production storage and offloading site could contribute an additional 17 to 70 tonnes of methane emissions annually. With 16 such sites currently in operation, this could mean over 1,000 tonnes of methane emissions are unaccounted for in the UK.

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In response to the findings, a spokesperson for the Department for Energy, Security and Net Zero stated that it is "incorrect" to claim that methane emissions from tankers are unrecorded, asserting that these emissions are included in the UK’s National Atmospheric Emissions Inventory. However, Dr. Ruth Purvis, the lead researcher, highlighted the reliance on "self-reporting" and pointed out a "grey area" regarding the accuracy of these emissions reports. She emphasized the importance of understanding and regulating these emissions to address climate change effectively.

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The research has intensified the debate surrounding the UK government's consideration of new oil drilling licenses in the North Sea. While Labour's manifesto opposes issuing new exploration licenses, the government is deliberating on existing fields, including the Jackdaw gas field and the Rosebank oil field, which would utilize oil tankers for transport. Chancellor Rachel Reeves and Scottish Labour leader Anas Sarwar support granting new licenses, while Energy Secretary Ed Miliband has expressed opposition, particularly to the Rosebank project, labeling it as "climate vandalism."

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Environmental advocates, including Doug Parr, chief scientist at Greenpeace, argue that new drilling will exacerbate climate issues by releasing millions of tonnes of CO2 and methane, ultimately leading to increased costs associated with extreme weather events. Experts contend that any new oil and gas produced would still be subject to international market fluctuations, undermining claims that it would lower energy bills for consumers.

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Despite the government's assertions regarding methane emissions reporting, discrepancies remain between official statements and the findings of the NCAS research. The debate over the environmental impact of new drilling licenses continues, with significant implications for the UK's climate goals and energy policy.

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• “If we are putting methane emissions into the atmosphere, we need to make sure that we understand them and they are regulated so we can account for them,” — Dr. Ruth Purvis, Lead Researcher, NCAS

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• “New drilling in the North Sea will only unleash millions of tonnes of CO2 and methane, driving up the real costs we all face through more extreme weather.” — Doug Parr, Chief Scientist, Greenpeace

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