** S&P 500 energy index .SPNY marginally down, tracking oil prices

** Brent crude futures LCOc1 and U.S. West Texas Intermediate crude CLc1 fall 0.5% each to $65.98/barrel and $62.24/barrel, respectively

** Oil prices set for weekly decline under pressure from market expectations of oversupply and uncertainty around Sino-U.S. tariff talks

** Energy majors Exxon XOM.N and Chevron CVX.N each down marginally

** Marathon Petroleum MPC.N, Texas Pacific Land Corp TPL.N, Coterra Energy CTRA.N and Phillips 66 PSX.N down between ~1% and 2.1%; among top percentage losers on the energy index

** Oilfield services company SLB SLB.N misses Q4 profit estimates as weaker Latin American demand weighed on its international business

** Refiner Phillips 66 PSX.N posts bigger-than-expected Q1 loss, hurt by lower refining margins

** Refiner Marathon Petroleum MPC.N down ~1%

(Reporting by Katha Kalia in Bengaluru)

((Katha.Kalia@thomsonreuters.com))