The price of oil struggled to advance much beyond $92 a barrel Tuesday on expectations that supplies will rise with ramped up output in Libya and the North Sea, along with more exports from Iran if a deal on its nuclear program succeeds. By midday in Europe, the benchmark U.S. oil contract for February delivery was up 23 cents at $92.03 a barrel in electronic trading on the New York Mercantile Exchange. The contract fell 92 cents to close at $91.80 on Monday. Brent crude, used to set prices for international varieties of crude used by many U.S. refineries, was flat at $105.27. An agreement Sunday between Iran and six world powers may enable Iran’s oil industry, whose exports were severely limited by economic sanctions over its nuclear program, to sell more crude after the deal takes effect Jan. 20. The planned six-month interim agreement will limit Tehran’s uranium […]