In this study we present a life cycle assessment model for a subset of EOR techniques applied to a field on the Norwegian Continental Shelf, focusing on a few select techniques, including polymer injection. The purpose is to document the impact of enhanced oil production on the emissions- intensity of the added barrels, for example kgCO2e/bbl. Processes considered include offshore vessels, logistics, waste treatment, injection energy, chemical manufacturing and transport, water desalination processes and associated chemicals and equipment, heating and electricity generation. The case where limited platform space is available is also presented. Results focus on the change in climate change potential for added production and will be contextualized by a comparison to conventional production and more energy-intensive production from, for example, Canadian oil sands. The model may be considered generic for most offshore locations, though conclusions drawn are specific to the case under evaluation. The results clearly support the importance of a life-cycle approach to identify all emission sources for enhanced oil recovery.


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