By David Gaffen NEW YORK (Reuters) -Oil prices jumped 5% to over $121 a barrel on Wednesday as disruptions to Russian and Kazakh crude exports via the Caspian Pipeline Consortium (CPC) pipeline added to worries over tight global supplies. The situation adds to market worries about the ripple effect of heavy sanctions on Russia, the world’s second-largest crude exporter, after its invasion of Ukraine. The CPC pipeline is a significant supply line for global markets, carrying around 1.2 million barrels per day of Kazakhstan’s main crude grade, or 1.2% of global demand. Brent crude futures settle…