Traders also watched for any reports of significant damage from Hurricane Isaac as it passed over oil facilities in the Gulf of Mexico. Nearly 95 percent of Gulf production was halted because of the storm.
Benchmark oil fell 84 cents to finish at $95.49 per barrel in New York. Brent crude, which is used to price international varieties of oil, fell 4 cents to $112.54 per barrel in London.
The government reported that the nation’s crude inventories increased by 3.8 million barrels to 364.5 million barrels last week. Analysts had expected a drop of 2 million barrels, according to Platts, the energy information arm of McGraw-Hill.
Separately, finance ministers from the Group of Seven countries said they are concerned that higher oil prices pose a risk to the sluggish global economy. They appealed to oil-producing countries to increase output while also suggesting they could ask the International Energy Agency to release oil from strategic reserves. The G-7 includes the U.S., Japan, Germany, France, Britain, Italy and Canada. The IEA represents more than two dozen oil-importing nations.
Maria van der Hoeven, who heads the IEA, told Bloomberg News that there is no need for a release from its stockpiles. “The market is sufficiently well supplied,” she said in an interview in Stavanger, Norway, adding that any action would require “a serious disruption of supply.”
The price of oil has risen by more than 20 percent since late June. But both benchmark U.S. oil and Brent crude remain more than 10 percent below their highs for the year.
Meanwhile, Hurricane Isaac pushed inland after battering the Gulf Coast, but it could be days before the extent of any damage to oil production facilities and coastal refineries is known.
Early reports indicated some rigs that were moved ahead of the storm were accounted for and all mobile drilling units remained in position, according to the Bureau of Safety and Environmental Enforcement.
Royal Dutch Shell plans to conduct a flyover inspection of its Gulf operations on Thursday as the weather improves. If conditions prove safe, it will deploy staff Friday to begin restarting operations. ExxonMobil said it’s beginning to assess Isaac’s impact on its operations in and around the Gulf as well.
About 1.3 million barrels per day of oil production has been shut down because of the Gulf closures. Some of that impact has been softened by changes in the market and the facilities themselves over the past few years.
Technological advances have led to a jump in oil production from onshore operations since hurricanes last hit the Gulf in 2008. And rigs have been constructed to be more durable after previous hurricanes.
“The storm wasn’t strong enough to probably do any serious infrastructure damage,” said Kyle Cooper, managing director of research at Cyprus Energy LP. He said offshore oil production could resume within two to three days if there is no damage.
There is one obvious impact from Isaac: higher gas prices. The national average retail price for gasoline rose nearly 5 cents to $3.804 per gallon on Wednesday, according to AAA, Wright Express and the Oil Price Information Service. That’s the biggest one-day jump in about 18 months. The price is up about 9 cents from a week ago and 19 cents from a year ago.
In other energy trading:
— Heating oil fell 0.46 cent to end at $3.1157 per gallon.
— Wholesale gasoline fell 2.58 cents to end at $3.1003 per gallon.
— Natural gas rose 2 cents to end at $2.634 per 1,000 cubic feet. The government estimated that nearly 72 percent of Gulf natural gas production has been suspended due to Isaac.