Brent crude futures were up 34 cents by 0908 GMT at $64.57. U.S. West Texas Intermediate (WTI) was up 18 cents at $57.69 a barrel.

OPEC+, as the enlarged group has come to be known, also sealed a long-term cooperation agreement “the Charter of Cooperation,” which aims to bring the 24 oil producing countries together to promote stability to a market that has been characterized by intense volatility in recent months.

“Iran is the biggest guarantor of energy stability and security in the region while the US is the biggest de-stabilizing force in the world’s energy sector.”

U.S. West Texas Intermediate (WTI) crude futures CLc1 were down $0.79 at $56.55 per barrel by 0754 GMT. There was no settlement price on Thursday because of the Independence Day holiday in the United States. Front-month Brent crude futures LCOc1 were down $0.23 at $63.07 per barrel. Both benchmarks were set for their biggest weekly falls in five weeks.

Front-month Brent crude futures LCOc1, the international benchmark for oil prices, were down 31 cents or 0.49% at $63.51 per barrel by 1320 GMT. Brent closed up 2.3% on Wednesday. U.S. West Texas Intermediate (WTI) crude futures CLc1 were down 51 cents or 0.89% at $56.83 per barrel. WTI closed up 1.9% on Wednesday.

Brent crude futures LCOc1 for September delivery were trading up 12 cents, or 0.2%, at $62.52 a barrel, U.S. crude futures for August CLc1 were up 16 cents, or 0.3%, at $56.41 a barrel.

Brent crude futures LCOc1 were down 15 cents, or 0.23%, at $64.91 a barrel , U.S. crude futures for August CLc1 were down 12 cents, or 0.20%, at $58.97 a barrel

In view of the current fundamentals and the consensus view on the outlook for the remainder of 2019, the Conference decided to extend the voluntary production adjustments agreed at the 175th Meeting of the OPEC Conference for an additional period of nine months from 01 July 2019 to 31 March 2020.

Once again, Iran has been exempted from the OPEC output cut deal, Zangeneh told the reporters.

Front-month Brent crude futures touched an intraday high of $66.75 a barrel and were up $1.80 at $66.54 a barrel by 0834 GMT. U.S. crude futures for August climbed $1.57 to $60.04 a barrel, after earlier hitting their highest in over five weeks at $60.28.