Kazakh Chevron JV says 2011 output 25.8 mln tons

    Tengizchevroil, the Kazakh oil venture led by U.S. energy major Chevron Corp, said on Monday that crude production in 2011 totaled 25.8 million tons, or 0.4 percent less than the 25.9 million tonnes produced in 2010.     Chevron is the largest single shareholder in the consortium, which is the largest oil producer...