Brent and West Texas Intermediate headed for the biggest quarterly decline in more than two years as abundant crude supplies offset the risk of disruption from conflict in the Middle East . Futures were up 0.4 percent in London, trimming a drop of 13 percent since the beginning of July. The U.S. and its European and Arab allies have conducted thousands of air missions since starting a bombing campaign to counter Islamic State militants in Syria and Iraq, OPEC’s second-largest producer. U.S. crude stockpiles probably expanded by 1.5 million barrels last week, a Bloomberg News survey shows before an Energy Information Administration report tomorrow. “There’s plenty of supply but no demand,” said Michael Hewson , a London-based market analyst at CMC Markets Plc, who forecasts that Brent could drop to $90 a barrel and WTI fall as low as $85 next quarter. “We have weak growth, with China and […]