Cold Venting and Fugitive Emissions from Norwegian Offshore Oil and Gas Sub-report 4 Check of calculation methods for fugitive emissions and small leaks

Fugitive emissions and small leaks are extremely difficult to quantify. Efforts were made to check factor methods used in similar industries in Canada and the UK, as well as default factors referenced in NS-EN 15446, against Dial measurement data for land plants in Norway.

Lack of data and shortage of time meant the results were not as good as expected. Independently, the study revealed big variations between emission quantities calculated with the aid of the specified factors and Dial measurements at land plants. The latter gave significantly higher emissions.

Similarly, a check was made against emission measurements with the aid of soap spray and bubble measurements on an NCS facility. This gave far lower emissions than the factors.

These conditions indicate that the calculated emission quantities from fugitive emissions and small leaks are very uncertain.

Substantial work has been done internationally with the OGI Leak/No Leak method for quantifying such emissions. This appears to be the trend for calculating fugitive emissions. Adopting the method on the NCS is recommended.

Offshore: Kaldventilering og diffuse utslipp

Kaldventilering og diffuse utslipp fra petroleumsvirksomheten på norsk sokkel: Sammendragsrapport (M-509)

Kaldventilering og diffuse utslipp fra petroleumsvirksomheten på norsk sokkel Delrapport 1 - Kartlegging av utslippskilder (M-510)

Kaldventilering og diffuse utslipp fra petroleumsvirksomheten på norsk sokkel Delrapport 2 - Utslippsmengder og kvantifiseringsmetodikk (M-511)

Kaldventilering og diffuse utslipp fra petroleumsvirksomheten på norsk sokkel Delrapport 3A - Forslag til beste tilgjengelige teknikker (BAT) (M-512)

Kaldventilering og diffuse utslipp fra petroleumsvirksomheten på norsk sokkel Delrapport 3B - Tiltaksmuligheter og reduksjonspotensialer (M 513)

Kaldventilering og diffuse utslipp fra petroleumsvirksomheten på norsk sokkel Delrapport 4 - Kontrollsjekk av beregningsmetoder for diffuse utslipp og smålekkasjer (M-514)

Offshore: Cold venting and fugitive emissions

Cold venting and fugitive emissions from Norwegian offshore oil and gas activities: Summary report (M-515)

Cold Venting and Fugitive Emissions from Norwegian Offshore Oil and Gas Activities - Module 1 Surveying installations to identify potential emission sources (M-664)

Cold venting and Fugitive Emissions from Norwegian Offshore Oil and Gas Activities - Module 3A report - Best available technique (BAT) assessments (M-665)

Cold Venting and Fugitive Emissions from Norwegian Offshore Oil and Gas Sub-report 2 Emission estimates and quantification methods (M-1771)

Cold Venting and Fugitive Emissions from Norwegian Offshore Oil and Gas Sub-report 3B Abatement opportunities and reduction potentials (M-1772)

Cold Venting and Fugitive Emissions from Norwegian Offshore Oil and Gas Sub-report 4 Check of calculation methods for fugitive emissions and small leaks (M-1773)