Sir Ian Wood, founder of oil services company Wood Group, said in August 2014 that he believed there were between 15 and 16.5 billion boe and that the impact from declining production would be felt by 2030.
Sir Ian Wood, osnivač naftne kompanije Wood Group, izneo je u avgustu 2014. svoje uverenje da je preostalo još oko 15 do 16,5 milijardi BOE te da će se smanjena produktivnost početi osećati dpo 2030. godine.