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Sustainability 2011, 3(11), 2050-2070; doi:10.3390/su3112050
Article

Energy Return on Investment for Norwegian Oil and Gas from 1991 to 2008

1,* , 2
 and
1
Received: 28 September 2010 / Revised: 15 February 2011 / Accepted: 15 March 2011 / Published: 26 October 2011
(This article belongs to the Special Issue New Studies in EROI (Energy Return on Investment))
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Abstract

Norwegian oil and gas fields are relatively new and of high quality, which has led, during recent decades, to very high profitability both financially and in terms of energy production. One useful measure for profitability is Energy Return on Investment, EROI. Our analysis shows that EROI for Norwegian petroleum production ranged from 44:1 in the early 1990s to a maximum of 59:1 in 1996, to about 40:1 in the latter half of the last decade. To compare globally, only very few, if any, resources show such favorable EROI values as those found in the Norwegian oil and gas sector. However, the declining trend in recent years is most likely due to ageing of the fields whereas varying drilling intensity might have a smaller impact on the net energy gain of the fields. We expect the EROI of Norwegian oil and gas production to deteriorate further as the fields become older. More energy-intensive production techniques will gain in importance.
Keywords: Norwegian oil and gas sector; Energy Return on Investment; net energy Norwegian oil and gas sector; Energy Return on Investment; net energy
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Grandell, L.; Hall, C.A.; Höök, M. Energy Return on Investment for Norwegian Oil and Gas from 1991 to 2008. Sustainability 2011, 3, 2050-2070.

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