Kazakhstan’s crude output fell 10% in October after maintenance curbed flows at the Chevron-led Tengiz field, according to an industry source cited by a Reuters report. Crude production averaged about 1.69 million barrels per day, while combined crude and condensate totaled 8.016 million metric tons, down from 8.345 million tons in September. Work at Tengiz ran from early October through October 24 and reduced field output to roughly 725,000 barrels per day from about 964,000 barrels per day in September, the source said. Despite the…