U.S. oil futures slipped further below the key $100 a barrel level, and international crude moved closer to U.S. prices as some geopolitical pressures eased.

Oil fell on progress in the eight-month standoff at Libyan ports but appears to have shrugged off tensions surrounding Ukraine and even a weekly U.S. government report Wednesday that showed a surprise drop in U.S. inventories. Traders, however, wrote off the decline of 2.4 million barrels in the week ended March 28 as a temporary dip because of the shutdown of the Houston shipping channel for three days two weeks ago.