Excerpt - Venezuelan President Hugo Chávez is planning a new assault on Big Oil, potentially taking a major step toward nationalization of Venezuela's oil industry that could hurt oil-company profits, reduce production and put further pressure on global oil prices. Venezuela's Congress, made up entirely of Mr. Chávez's allies, is considering sharply raising taxes and royalties on foreign companies' operations in the Orinoco River basin, the country's richest oil deposit. Major oil companies like Exxon Mobil Corp. and ConocoPhillips of the U.S. and Total SA of France have invested billions of dollars there to turn the basin's characteristically tar-like oil...