** Shares of U.S. energy companies rise premarket, as oil prices surge after Middle East talks collapse, naval blockade looms
** Oil prices climbed above $100 a barrel as the U.S. Navy prepared to block ships to and from Iran via the Strait of Hormuz, a move that could restrict Iranian oil exports, after Washington and Tehran failed to reach a deal to end the war
** Shares of energy majors Exxon Mobil XOM.N and Chevron CVX.N rise 2.7% and 2.3%, respectively
** Oil and gas producers Occidental Petroleum OXY.N, Devon Energy DVN.N, Diamondback Energy FANG.O and ConocoPhillips COP.N up between 3.2% and 4.1%
** Oilfield services companies Halliburton HAL.N adds 2.1% and SLB SLB.N up about 1.2%
(Reporting by Joel Jose in Bengaluru)
((joeljose@thomsonreuters.com))