<P> The proven oil reserves in Saudi Arabia are the second largest in the world , estimated to be 268 billion barrels ( 43 × 10 ^ m ) ( Gbbl hereafter ) , including 2.5 Gbbl in the Saudi -- Kuwaiti neutral zone . They are predominantly found in the Eastern Province . These reserves were the largest in the world until Venezuela announced they had increased their proven reserves to 297 Gbbl in January 2011 . The Saudi reserves are about one - fifth of the world 's total conventional oil reserves , a large fraction of these reserves comes from a small number of very large oil fields , and past production amounts to 40 % of the stated reserves . </P>
<P> The proven oil reserves in Saudi Arabia are the second largest in the world , estimated to be 268 billion barrels ( 43 × 10 ^ m ) ( Gbbl hereafter ) , including 2.5 Gbbl in the Saudi -- Kuwaiti neutral zone . They are predominantly found in the Eastern Province . These reserves were the largest in the world until Venezuela announced they had increased their proven reserves to 297 Gbbl in January 2011 . The Saudi reserves are about one - fifth of the world 's total conventional oil reserves , a large fraction of these reserves comes from a small number of very large oil fields , and past production amounts to 40 % of the stated reserves . </P>
where are most of saudi arabia 's oil fields located
where are most of saudi arabia 's oil fields located
in the Eastern Province
in the Eastern Province