Cold Venting and Fugitive Emissions from Norwegian Offshore Oil and Gas Sub-report 2 Emission estimates and quantification methods
Om publikasjonen
Prepared for the Norwegian Environment Agency
The methodology for quantifying emissions from individual sources was assessed on the basis of the emission source survey in module 1 of this project, and principles for future quantifications were recommended. General quantification methods were proposed for most of the emission sources to ensure consistency.
Where sources which occur only on one or a few facilities are concerned, it was proposed that the operator prepares facility-specific methods. Such methods were also recommended for emissions sources which are so complex that general methods can be inconsistent.
Where sources with very low emissions are concerned, the recommendation was that separate quantification of these emissions be omitted and replaced by a simple percentage mark-up covering all such small sources.
New emissions estimates were prepared. These indicated that the previously reported emissions may be overstated. However, the level of uncertainty is high, particularly for fugitive emissions and minor leaks.