West Texas Intermediate fluctuated amid forecasts that a report tomorrow will show that U.S. crude supplies gained for a 10th week while stockpiles of distillate fuel, a category that includes heating oil and diesel, dropped.

Futures traded in a 86-cent range. The Energy Information Administration will probably say crude inventories rose 750,000 barrels last week, according to the median of nine responses in a Bloomberg survey. Stockpiles of distillate fuel fell to a five-year low, the survey showed. Prices slipped yesterday after Iran and world powers reached an interim agreement on Nov. 24 to restrict the country’s nuclear program.

WTI crude for January delivery slipped 5 cents to $94.04 a barrel at 10:59 a.m. on the New York Mercantile Exchange. The volume of all futures traded was 48 percent below the 100-day average. Prices are up 2.4 percent this year.

Brent for January settlement rose 11 cents to $111.11 a barrel on the London-based ICE Futures Europe exchange. Volume was 21 percent lower than the 100-day average.