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Contributor
Peter Zeniewski
Senior Energy Analyst. Dr. Peter Zeniewski is a Senior Energy Analyst at the IEA. His main area of focus is the outlook for natural gas and LNG – covering long-term assessments of supply, demand, trade, investment and pricing. He has also led projects on energy affordability, biogases, India’s energy outlook, and emissions from oil and gas supply. Prior to joining the IEA, Peter was a Chancellor’s Fellow at the University of Edinburgh and held positions at the European Commission and Wood Mackenzie. He holds a PhD in International Relations from the University of Oxford.
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Fuel report
Sep 2025
The Implications of Oil and Gas Field Decline Rates Executive summary
Discussions on the future of oil and gas often overemphasise demand drivers and underappreciate supply drivers Debate over the future of oil and natural gas tends to focus on the outlook for demand, with much less consideration given to how the supply picture could develop. This asymmetry is misplaced and a thorough understanding of the rate at which production from existing oil and gas fields declines over time is more important than ever. The International Energy Agency (IEA) has long examined this issue. Decline rates – the annual rate at which production declines from an existing oil or gas field – underpin…
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