Oil prices climb for US sanctions on Iran

Oil prices rose on Monday as increased global demand and US efforts to shut out Iranian output using sanctions outweighed drilling data suggesting US shale production would climb.

Benchmark Brent LCOc1 was up 60 cents at $77.71 a barrel by 1020 GMT. US crude CLc1 was down 25 cents at $73.55.

The United States says it wants to reduce oil exports from Iran, the world's fifth biggest oil producer, to zero by November, in a move that will oblige other big producers such as Saudi Arabia to pump more.

But Saudi Arabia and other members of the Organization of the Petroleum Exporting Countries have little spare capacity and oil demand has risen faster than supply over the last year.

At the same time, exports from several Opec producers, including Venezuela and Libya, have been falling.

“If the Saudis and others replace the losses from Iran, there will be basically no spare capacity left,” Societe Generale analyst Michael Wittner said.

US oil output is increasing but is unlikely to be able to fill the supply gap if US sanctions are successful in blocking Iranian exports.

US energy companies last week increased the number of rigs drilling for oil by five to 863, up 100 year-on-year, General Electric Co's Baker Hughes energy services firm said in a report on Friday.

The US rig count, an early indicator of future output, is much higher than a year ago as energy companies have ramped up production in response to higher prices.

But the US oil market is still tightening.

Crude oil inventories at Cushing, Oklahoma, the delivery point for US crude futures, have fallen to their lowest in 3-1/2 years, data showed last week.

“Cushing is clearly screaming out for crude,” said Virendra Chauhan, oil analyst at Energy Aspects in Singapore.