The news of the talks on Sunday helped offset the downward pressure on oil prices amid worries that energy demand would be hit hard by Hurricane Irma.
Hurricane Irma knocked out power to more than 3 million homes and businesses in Florida on Sunday, but it has weakened to a Category 2 with maximum sustained winds of 110 miles per hour (177 kph).
U.S. crude for October delivery was up 29 cents, or 0.6 percent, at $47.77, having tumbled 3.3 percent on Friday.
London Brent crude for November delivery was up 23 cents, or 0.4 percent, at $54.01 a barrel by 0023 GMT, having settled down 1.3 percent.
OPEC and other producers, including Russia, have agreed to reduce crude output by about 1.8 million barrels per day until next March in a bid to reduce global oil inventories and support oil prices.
The Saudi energy ministry said Energy Minister Khalid al-Falih agreed with his Kazakh counterpart that the option to extend the rebalancing effort would be considered in due course.
Elsewhere, Iran will reach an oil production rate of 4.5 million barrels per day (bpd) within five years, Ali Kardor, managing director of the National Iranian Oil Company (NIOC), said Sunday according to the oil ministry news site SHANA.
Iran has been producing around 3.8 million bpd in recent months.Saudi Arabia on Saturday also suspended any dialogue with Qatar, accusing it of “distorting facts”, just after a report of a phone call between the leaders of both countries suggested a breakthrough in the Gulf dispute.