The U.S. Energy Information Administration cut its crude price forecasts by $15 a barrel after OPEC’s decision last month to maintain output as North American oil output increases. The agency reduced its 2015 U.S. oil production outlook for a second month. West Texas Intermediate will average $62.75 a barrel in 2015 versus the November projection of $77.75, the EIA said today in its monthly Short-Term Energy Outlook . The agency trimmed its Brent crude estimate for next year to $68.08 from $83.42. Prices have tumbled since the 12-nation Organization of Petroleum Exporting Countries decided Nov. 27 to maintain output levels, letting prices decrease to a level that may slow U.S. production growth. The decline in prices will start to affect U.S. production next year, EIA Administrator Adam Sieminski said in an e-mailed statement. “U.S. oil production growth is expected to slow next year in response to lower crude […]