LONDON—Oil prices slipped on Friday, after sharp rises in the session, on concern over potential global supply disruptions from sanctions on major crude exporter Russia. The April Brent crude futures contract was down 33 cents, or 0.3 percent, to $98.75 a barrel at 1045 GMT, after climbing to as high as $101.99. The more active May contract shed 40 cents, or 0.4 percent, to $98.75. U.S. West Texas Intermediate (WTI) crude were down 30 cents, or 0.3 percent, to $92.51 a barrel, after hitting a session high of $95.64. Russia’s invasion of Ukraine on Thursday caused prices to surge above $100 a barrel for the first time since 2014, with Brent touching $105, before paring gains by the close of trade. The assault was the biggest attack on a European state since World War Two, prompting tens of thousands of people to flee their homes. In response to the invasion, …