Oil prices fell on Thursday on expectations that OPEC members will step up production in the face of worries over supply from both Venezuela and Iran. A surprise build up in crude oil inventories in the United States also weighed on prices, driving the spread between Brent crude and U.S. West Texas Intermediate (WTI) close to its widest in three years. CL-LCO1=R International benchmark Brent LCOc1 futures were down 37 cents, or 0.46 percent, at $79.43 per barrel at 0610 GMT. WTI crude CLc1 futures were down 27 cents, or 0.38 percent, at $71.57 a barrel. The Organization of Petroleum Exporting Countries (OPEC) may decide to increase oil output to make up reduced supply from Iran and […]