The oil major bought 29 out of the 31 partials that traded on the window, setting cash Dubai at $49.70 a barrel, traders said.
Following the trades, Total will deliver an Upper Zakum cargo to Shell, while Chinaoil will deliver an Al-Shaheen cargo to the oil major.
The spread between cash Dubai and Dubai swaps eased to just two cents a barrel, from 13 cents a day earlier.
Taiwanese state-refiner CPC is seeking December loading or Dec. 15-Jan. 15 delivery sour crude in a tender that closes on Oct. 20. Offers entered will be held valid to Oct. 21.