(In 2nd paragraph, corrects prices for Brent settlement to rose 54 cents, or 0.76 percent, to settle at $71.72 a barrel; not rose 56 cents, or 0.8 percent, to $71.74 a barrel)
* U.N. Libya envoy says Haftar made coup attempt
* Iran's oil exports hit new 2019 low so far in April - sources
* Russia's Gazprom Neft sees global oil deal ending in mid-2019
* U.S. crude inventories seen rising for fourth week
* Coming Up: API's weekly oil data at 4:30 p.m. (2030 GMT)
By Stephanie Kelly
NEW YORK, April 16 (Reuters) - Oil prices rose 1 percent on Tuesday, as fighting in Libya and falling Venezuelan and Iranian exports raised concerns over tightening global supply, but uncertainty surrounding an OPEC-led production cut limited gains.
Brent crude LCOc1 futures rose 54 cents, or 0.76 percent, to settle at $71.72 a barrel. U.S. West Texas Intermediate (WTI) crude CLc1 futures gained 65 cents, or 1 percent, to settle at $64.05 a barrel.
In Libya, fighting between Khalifa Haftar's Libyan National Army and the internationally recognized government has raised the prospect of lower supplies from the OPEC member. sanctions on two other members, Iran and Venezuela, are already cutting shipments. Iran's crude oil exports have dropped in April to their lowest daily level this year, tanker data showed and industry sources said. supply is falling faster than people think. The market is imbalanced," said Phil Flynn, an analyst at Price Futures Group in Chicago. "The continuing loss of Venezuelan oil is going to take its toll. The OPEC cuts are going to take their toll."
Adding downward pressure, however, were concerns about Russia's willingness to stick with OPEC-led supply cuts and expectations of higher U.S. inventories.
Oil prices have gained this year more than 30 percent, helped by the deal between the Organization of the Petroleum Exporting Countries and other producers including Russia. The group has been cutting output since Jan. 1 and will decide in June whether to continue the arrangement.
Gazprom Neft SIBN.MM , the oil arm of Russian gas giant Gazprom GAZP.MM , expects the global oil deal between OPEC and its allies to end in the first half of the year, a company official said on Tuesday. and the producer group may decide to boost output to fight for market share with the United States, TASS news agency сited Finance Minister Anton Siluanov as saying on Saturday. is a growing concern that Russia will not agree on extending production cuts and we could see them officially abandon it in the coming months," said Edward Moya, senior market analyst at OANDA.
Also weighing on prices, U.S. crude inventories are expected to have risen by 1.7 million barrels last week, the fourth straight weekly increase. However, gasoline stockpiles were forecast to have fallen for nine straight weeks with refining rates at below 90 percent of total capacity since early February due to seasonal maintenance. EIA/S
The first of this week's stockpile reports is due at 4:30 p.m. EDT (2030 GMT) from the American Petroleum Institute, followed by government data on Wednesday.
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