Norwegian consultancy Rystad Energy said on Thursday that it expects the growth to be realised from 20 countries around the world from 2014 to 2018, as "low oil prices have not affected closed and emerging markets to the same degree".

According to the consultancy, Iran is expected to have the largest growth, increasing its purchases by more than $6 billion in the period to realise its production targets after UN sanctions on the country were lifted in January.

Rystad