By Jacob Gronholt-Pedersen
SINGAPORE (Reuters) - Oil prices fell slightly on Thursday as rising U.S. crude inventories due to robust shale production outweighed concerns over renewed air strikes in Yemen.
Saudi-led coalition warplanes continued bombing Yemen on Wednesday despite an announcement by Riyadh a day earlier that it was ending its campaign of air strikes.
While Yemen is not among the biggest producers in the Middle East, others in the region ship crude bound for Europe along the Gulf of Aden on Yemen's southern coast and through the narrow straits of Bab el-Mandeb, between Yemen and Djibouti.
Oil prices have risen as much as $10 this month due to concerns over potential supply disruption as well as signs of stronger global demand.
Brent crude for June delivery
U.S. crude for June delivery
The U.S. benchmark was weighed down by Wednesday's government data showing crude stockpiles rose 5.3 million barrels last week, higher than the 2.9-million-barrel build expected by analysts in a Reuters survey. [EIA/S]
It was the 15th consecutive weekly build for crude stocks and pushed U.S. commercial inventories to a record peak.
The U.S. Energy Information Administration (EIA) also said that domestic oil production saw its third weekly decline last week in four.
But some experts said the weekly government data is misleading and that output probably hasn't started falling yet, despite a lower number of rigs drilling for oil.
"We still see a fundamental excess of crude supplies persisting, at least for the next few months," analysts at BNP Paribas (PARIS:BNPP) said in a note, pointing to little prospect for significant increases in crude demand amid already high refinery run rates.
Executives at the CERA industry gathering in Houston said with costs of fracking a shale well in the United States falling faster than expected, producers could keep working in oilfields that just months ago looked uncompetitive after the oil price crash.