Discoveries of new oil reserves have dropped to their lowest level for more than 60 years, pointing to potential supply shortages in the next decade.
Oil explorers found 2.8bn barrels of crude and related liquids last year, according to IHS, a consultancy. This is the lowest annual volume recorded since 1954, reflecting a slowdown in exploration activity as hard-pressed oil companies seek to conserve cash.
Most of the new reserves that have been found are offshore in deep water, where oilfields take an of average seven years to bring into production, so the declining rate of exploration success points to reduced supplies from the mid-2020s.
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