
By Enes Tunagur and Robert Harvey
LONDON, Nov 19 (Reuters) - Oil prices fell sharply on Wednesday after a report of a U.S. proposal to end the Russian war in Ukraine and as oversupply concerns continued to weigh on prices.
Brent crude LCOc1 futures fell $1.72, or 2.65%, to $63.17 a barrel by 1421 GMT after gaining 1.1% the previous session.
U.S. West Texas Intermediate crude CLc1 futures were down $1.65, or 2.72%, at $59.09 after rising by 1.4% on Tuesday.
Ukraine has received "signals" about a set of U.S. proposals to end the war, which Washington has discussed with Russia, a senior Ukrainian official told Reuters on Wednesday.
Ukrainian President Volodymyr Zelenskiy will hold talks in Turkey on Wednesday and meet U.S. Army officials in Kyiv on Thursday in a new drive to revive peace negotiations with Russia.
Successful peace talks would reduce oil supply risks, said Saxo Bank analyst Ole Hansen.
Russian Deputy Prime Minister Alexander Novak said that U.S. sanctions against Rosneft ROSN.MM and Lukoil LKOH.MM, imposed in October after peace talks stalled, have had no impact on Russian oil output.
The U.S. Treasury said on Monday that sanctions now squeezing Russia's oil revenue are expected to curb its export volumes. Crude buyers in China and India have already started switching to alternative suppliers.
Those sanctions come into full effect on November 21 when a U.S. Office of Foreign Assets Control (OFAC) wind-down licence ends, except for assets given separate operating licences.
"There is maximum pressure right now as Friday's deadline is looming," said Rystad Energy oil analyst Janiv Shah, adding that a lower geopolitical risk premium would leave investors focusing more closely on weak market fundamentals.
SUPPLY GLUT IN FOCUS
The risk of a supply glut continued to weigh on prices along with falling gasoil futures after strong gains in recent sessions, Saxo Bank's Hansen added.
U.S. crude stocks rose by 4.45 million barrels in the week ended November 14 while gasoline inventories climbed by 1.55 million barrels and distillate stocks grew by 577,000 barrels, market sources said late on Tuesday, citing American Petroleum Institute figures.
Inventory data from the U.S. Energy Information Administration (EIA) is due later on Wednesday.