"We might have to extend in order to reach the target... of stock levels," Khalid al-Falih told an energy forum in Abu Dhabi, referring to a deal between OPEC and non-OPEC producers to cut production by around 1.8 million barrels per day.
Falih, whose country is the world's largest exporter, said there was a sort of "initial agreement " on the need to extend the deal after talks in Kuwait last month.
"There was a high level of commitment in the first three months, but despite that, we have not achieved the target" of reducing the supply glut, he said.
OPEC members agreed in November to cut production by 1.2 million barrels per day for six months beginning from the start of the year in a bid to shore up prices.
Some non-cartel producers, led by Russia, joined in December by committing to cut output by 558,000 bpd.
"It is important that we agree to extend the agreement," he told the forum.
Oil prices currently hover just over USD 50 per barrel after shedding around half of their value since mid-2014.
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