US sanctions against Iran and Venezuela have also propped up prices
Oil prices hovered close to 2019 highs on Thursday, bolstered by OPEC-led supply cuts and US sanctions on Venezuela and Iran, but were prevented from rising further by slowing growth in the global economy.
US West Texas Intermediate (WTI) crude oil futures were at $57.33 per barrel at 0256 GMT, 17 cents, or 0.3 per cent, above their last settlement, but below their 2019 high of $57.55 reached the previous day.
International Brent crude futures were at $67.14 per barrel, 6 cents above their last close and not far off their 2019 peak, hit the day before, of $67.38 per barrel.
