NEW YORK (Reuters) - Oil prices fell on Friday as concerns about surging U.S. output and falling demand in China weighed on the contract and JP Morgan cut its price forecast.

FILE PHOTO: Oil pumpjacks are seen in Lagunillas, Venezuela May 24, 2018. REUTERS/Isaac Urrutia

Brent crude futures LCOc1 settled down 86 cents, or 1.1 percent, at $76.46 a barrel. U.S. West Texas Intermediate (WTI) crude futures CLc1 ended 21 cents lower at $65.74 a barrel. For the week, Brent fell 0.5 percent, while U.S. crude slipped 0.3 percent.

In the past three weeks, prices have declined from three-year highs as the market has contended with supply concerns. On Friday, oil prices came under pressure after data suggested Chinese demand was waning and concerns lingered about growing U.S. output.

Hedge funds and other money managers cut their bullish bets on U.S. crude futures in the week ended June 5, the U.S. Commodity Futures Trading Commission (CFTC) said.

JP Morgan cut its 2018 crude forecast for WTI by $3 to $62.20 a barrel. The bank said geopolitical tensions and lingering risks of supply disruptions may push prices higher during the second half 2018, it expects prices will head lower late in the year, and remain capped in 2019.

The futures contracts dipped after the forecast was issued, and then pared losses.

China’s May crude oil imports eased away from a record high hit the previous month, customs data showed, with state-run refineries entering planned maintenance.

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 C-OUT-T-EIA, 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. RIG-OL-USA-BHI [RIG/U]

The surge in U.S. production has pulled down WTI into a discount versus Brent CL-LCO1=R 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.

On Friday, OPEC’s third-largest producer Iran criticized a U.S. request that Saudi Arabia pump more oil to cover a drop in Iranian exports and predicted that OPEC would not heed the appeal.

Headlines on OPEC members’ plans for the meeting later this month will lead to volatile market swings, said Tariq Zahir, managing member of Tyche Capital Advisors in New York.

“I think it is going to be very choppy,” he said.