By Nicole Friedman 
 

NEW YORK--Oil futures slipped Wednesday after government data showed U.S. oil stocks were at their highest level in 83 years.

Light, sweet crude for June delivery settled down 31 cents, or 0.3%, at $101.44 a barrel on the New York Mercantile Exchange, the lowest settlement since April 7. Brent crude on the ICE Futures Exchange fell 16 cents, or 0.2%, to $109.11 a barrel.

Crude-oil stockpiles rose by 3.5 million barrels to 397.7 million barrels in the week ended April 18, the U.S. Energy Information Administration said Wednesday. Analysts surveyed by The Wall Street Journal expected a 2.4 million-barrel increase.

Supplies stand at an all-time high in weekly EIA data going back to August 1982.

In monthly data going back to 1920, last week's supplies are the highest since May 1931.

"The market is holding firm in the face of a pretty significant surplus" in supply, said Tim Evans, analyst at Citi Futures Perspective. "We clearly are not making an 83-year low in price."

Prices have climbed above $100 a barrel in recent weeks despite rising stockpiles because storage supplies in Cushing, Okla., the delivery point for the Nymex contract, have been shrinking.

A new pipeline opened on Jan. 22 to move supplies out of Cushing to refineries on the Gulf Coast. Cushing supplies now stand at their lowest level since 2009, and futures prices have risen as traders have focused on the large drops in Cushing inventories, Mr. Evans said.

But with some refineries shutting units for seasonal maintenance, not all the crude being shipped to the Gulf Coast has been processed into gasoline and other fuels. Gulf Coast supplies rose last week to 209.6 million barrels, a new high for the region according to data going back to 1990.

"People who are focused exclusively on Cushing are focused on an island that's surrounded by a lake of crude," said Richard Soultanian, co-president of NUS Consulting Group in Park Ridge, N.J. "The Gulf is now drowning in crude."

U.S. oil production is booming, due to hydraulic fracturing and horizontal drilling techniques that have enabled energy producers to access supplies trapped in shale-oil fields. But some refineries prefer to process heavy grades of crude, while much of the oil produced in the U.S. is light crude oil. So rising U.S. production is not completely replacing imports of oil from overseas.

"With parts of the refinery system continuing to require heavy and sour foreign crudes, insufficient volumes of crude imports are being displaced...to prevent stocks building," said analysts at BNP Paribas SA in a note.

Mr. Evans said he expects U.S. oil prices to fall $10 a barrel in the next few weeks as traders shift their focus away from Cushing toward the overall supply level.

Gasoline stockpiles fell less than expected, down 274,000 barrels to 210 million barrels, the EIA said. Analysts surveyed by The Wall Street Journal expected a 1.4 million-barrel decrease.

Front-month May reformulated gasoline blendstock, or RBOB, settled down 0.17 cent, or 0.1%, at $3.0935 a gallon.

Distillate stocks, which include heating oil and diesel fuel, grew by 597,000 barrels to 112.5 million barrels, compared with analysts' forecast of a drop of 300,000 barrels.

May diesel fell 2.17 cents, or 0.7%, to $2.9809 a gallon.

Refining capacity utilization rose 2.2 percentage points to 91% of capacity. Analysts had expected the operating rate to rise by 0.3 percentage point in the week.

More information on settlements and highs and lows for futures on Nymex and ICE platforms can be found by searching for the following headlines:

   Nymex Light Crude Oil Close 
   Nymex Harbor RBOB Gasoline Close 
   Nymex Heating Oil Close 
   ICE Brent Crude Oil Close 
   ICE Gas Oil Close 
 
 
 

Write to Nicole Friedman at nicole.friedman@wsj.com