Brent gained $1.44 to $65.04 a barrel, WTI was up 89 cents at $59 a barrel.

Brent were down 75 cents, or 1.16%, at $63.80 a barrel, WTI were down $1.15, or 1.94%, at $58.19.

Brent was down 36 cents, or 0.5%, at $68.66 a barrel, and WTI was down 57 cents, or 0.9%, at $62.33 a barrel. Earlier, the crude benchmarks both fell by around 2%.

"Nobody has changed the parameters of the [OPEC+} deal. So, I think that we all agreed in Abu Dhabi, that everyone should fulfill their obligations," Novak said, when asked if Russia needs to continue to comply.

Conformity with the voluntary production adjustments remains high, 136% in the month of August. However, the JMMC reemphasized the core principles underpinning the DoC, namely, equity, fairness and transparency, and urged all participating countries to intensify their efforts in pursuit of full and timely conformity with their voluntary production adjustments.

World oil demand in 2019 is expected to grow by 1.02 mb/d, which is 0.08 mb/d lower than last month’s projection. The drop can be attributed to weaker-than-expected data in 1H19 from various global demand centres and slower economic growth projections for the remainder of the year. Both OECD and non-OECD demand growth forecasts were revised lower, by 0.03 mb/d and 0.05 mb/d, respectively. In 2020, world oil demand is projected to increase by 1.08 mb/d.

Brent crude futures, the international benchmark, rose as much as 19.5% to $71.95 per barrel, WTI futures climbed as much as 15.5% to $63.34

Brent rose 40 cents, or 0.6%, to $62.78 a barrel , WTI were up 37 cents, or 0.6%, to $57.77 a barrel.

Brent crude oil spot prices averaged $59 per barrel (b) in August, down $5/b from July and $13/b lower than the average from August of last year. EIA forecasts Brent spot prices will average $60/b in the fourth quarter of 2019 and $62/b in 2020. EIA forecasts that West Texas Intermediate (WTI) prices will average $5.50/b less than Brent prices in 2020.

Brent was up 67 cents or 1.07% at $63.26 a barrel, WTI were up 63 cents, or 1.09%, at $58.48 a barrel.