By Jessica Resnick-Ault
Brent crude futures fell 66 cents to $76.66 a barrel by 1:32 p.m. EDT [1732 GMT]. U.S. West Texas Intermediate (WTI) crude futures recovered some earlier losses to trade 25 cents lower at $65.71. For the week, Brent was set to fall 0.2 percent, while U.S. crude was little changed.
Crude prices came under pressure after data suggested Chinese demand was waning and concerns lingered about growing U.S. output.
The futures contracts dipped after the forecast was issued, and then pared losses.
May shipments were 39.05 million tonnes, or 9.2 million barrels per day (bpd). That compared with 9.6 million bpd in April.
Further weighing on prices has been rising U.S. output, which hit another record last week at 10.8 million bpd.
U.S. drillers added one oil rig in the week to June 8, bringing the total count to 862, the highest level since March 2015, General Electric Co's Baker Hughes energy services firm said in its closely followed report on Friday.
The surge in U.S. production has pulled down WTI into a discount versus Brent of more than $11 a barrel, its steepest since 2015.
MARKET STILL TIGHT
Despite Friday's decline, Brent remains more than 15 percent above its level at the start of the year.
U.S. investment bank Jefferies said the crude market is tight and spare capacity could dwindle to 2 percent of demand in the second half of 2018, its lowest level since at least 1984.
Markets have been tightened by supply trouble in Venezuela, where state-owned oil company PDVSA is struggling to clear a backlog of about 24 million barrels of crude waiting to be shipped to customers.
More generally, Brent has been pushed up by the voluntary production cuts put in place last year, led by the Organization of the Petroleum Exporting Countries (OPEC) and Russia.
OPEC and Russia meet on June 22/23 to discuss production policy.
"I think it is going to be very choppy," he said.