Oil prices retreated to below $46 a barrel Friday in Asia after a strong rally overnight, Associated Press reported. Light, sweet crude for January delivery fell $2.38 to $45.60 a barrel in electronic trading on the New York Mercantile Exchange by midafternoon in Singapore. Overnight, the contract surged $4.46, or 10 percent, to settle at $47.98. Oil prices have fallen 70 percent since peaking at $147.27 in July. In other Nymex trading, gasoline futures fell 3.8 cents to $1.0400 a gallon. Heating oil dipped 4.2 cents to $1.4645 a gallon and natural gas for January delivery lost 10.2 cents to $5.496 per 1,000 cubic feet. In London, January Brent crude fell $1.85 to $45.54 a barrel on the ICE Futures exchange.