SEOUL, Oct 31 (Reuters) - SK Innovation Co Ltd

, owner of South Korea's top refiner SK Energy, on

Friday said refining margins are expected to remain resilient in

the fourth quarter amid global supply disruptions and the onset

of winter peak demand season.

The company posted an operating profit of 573 billion won

($403.10 million) for the July-September period, versus a 423

billion won loss a year earlier. That compared with an average

analyst forecast of 304 billion won profit.

($1 = 1,421.4800 won)

(Reporting by Heekyong Yang; Editing by Muralikumar

Anantharaman)