** S&P 500 energy index up 1.8%, tracking higher oil prices
** Brent crude futures up 2.9% at $109.02 a barrel, after hitting its highest since September 14
** US West Texas Intermediate crude rise 2.6% to $100.52 a barrel, crossing $100 for the first time since September 21
** Prices gainmore than 3%, heading for weekly gains on continued uncertainty over Middle East supplies, and as investors kept assessing how much diesel Russia could supply to the global markets
** Energy majors ExxonMobil up 1.9% and Chevron gains 2.2%
** EOG Resources, Diamondback Energy, ConocoPhillips and EQT Corp up between 3.3% and 3.7%, among the top percentage gainers on the energy index
** Oilfield services companies Baker Hughes up 2.5% and SLB gains 2.6%
** Refiner Phillips 66 up 1.4%
(Reporting by Sumit Saha in Bengaluru)