By Stephanie Kelly NEW YORK (Reuters) -Oil prices surged on Monday over 2% to their highest in more than seven years as Ukraine’s President said he had heard that Russia could invade the country on Wednesday. Russia is one of the world’s largest oil-and-gas producers, and fears that it could invade Ukraine have driven the rally in oil closer to the $100-per-barrel mark. “The market remains hyper-sensitive to the developments over the Russian/Ukraine situation,” said John Kilduff, partner at Again Capital in New York. “This is now intensifying to a terrific degree. Right now, it’s buy now, ask …