Brent crude rose 30 cents, or 0.4%, to $83.66 a barrel by 0434 GMT, while U.S. West Texas Intermediate crude was up 31 cents, also 0.4%, at $79.36 a barrel.
Crude prices are set to fall between 1.5%-2.5% for the week, a second consecutive week of decline.
A strong dollar makes oil more expensive for holders of other currencies, denting demand.
Further weighing on market sentiment, U.S. officials are drafting a proposal that would ease sanctions on Venezuela's oil sector, allowing more companies and countries to import its crude oil.
Analysts estimated that the top oil exporter will likely roll over a voluntary oil cut of 1 million barrels per day for a third consecutive month into October, amid uncertainty about supplies and as the kingdom targets drawing down global inventories further.
Persons:
Chen Aizhu, Jerome Powell, Brent, Jun Rong, Powell's, Laura Sanicola, Muyu Xu, Jacqueline Wong
Organizations:
China National Petroleum Corporation, Dalian Petrochemical Corp, REUTERS, Companies United, Federal, U.S, West Texas, IG, Haitong Futures, Analysts, Thomson
Locations:
China, Dalian, Liaoning province, Companies United States, America, Turkey, Kurdistan, Iraq, Saudi Arabia