Brent crude futures was at $78.42 a barrel, up $2.29, or 3%, at 2219 GMT after earlier hitting a session-high of $78.73 a barrel.
U.S. West Texas Intermediate crude climbed $2.27 a barrel, up 3.2%, or $74.01 a barrel, after touching an intraday high of $75.06 a barrel.
Saudi Arabia's output would drop to 9 million barrels per day (bpd) in July from around 10 million bpd in May, the biggest reduction in years, its energy ministry said in a statement.
The group, known as OPEC+, pumps around 40% of the world's crude and has in place cuts of 3.66 million bpd, amounting to 3.6% of global demand.
By contrast, the United Arab Emirates was allowed to raise output targets by around 0.2 million bpd to 3.22 million bpd.
Persons:
Florence Tan, Diane Craft
Organizations:
Saudi, Brent, . West Texas, Organization of, Petroleum, ANZ, United Arab, Thomson
Locations:
SINGAPORE, Saudi Arabia, Saudi, Russia, OPEC, Nigeria, Angola, United Arab Emirates, UAE