HOUSTON (Reuters) -U.S. oil producer Chevron on Wednesday said it is assessing the status of a export terminal at a Black Sea port that Russia said was affected by storm damage, but the pipeline to the port and its Kazakhstan output is currently unaffected. Chevron holds a 15% stake in the Caspian Pipeline Consortium (CPC), which owns a 1,510-kilometer pipeline that carries about 1.2% of the world’s oil from oilfields in Kazakhstan to an export terminal in Russia. The company’s Tengizchevroil (TCO) joint venture oil production in Kazakhstan that relies on the terminal “continues uninterrupted,…