By Christopher Johnson
LONDON (Reuters) - Oil prices rose on Wednesday after Venezuela raised the prospect of a halt to some crude exports, but gains were capped by reports that the U.S. government had asked Saudi Arabia and some other OPEC producers to increase output.
Falling Venezuelan oil production helped push up global crude benchmark Brent to more than $80 a barrel last month.
Brent was up 20 cents a barrel at $75.58 by 0900 GMT. U.S. light crude was unchanged at $65.52.
Venezuela has the world's biggest oil reserves and is a key supplier to American fuel markets but its output has been hampered by inadequate investment, mismanagement and a confrontation with the United States that has led to sanctions.
Three sources have told Reuters that Venezuelan state firm PDVSA is considering declaring force majeure on some exports, amid plummeting output and tanker bottlenecks at ports.
"It's a tug of war between the loss of supply from Venezuela and Iran and the potential output increase from OPEC and U.S. shale," said Tony Nunan, risk manager at Mitsubishi Corp. "$80 is a temporary ceiling for oil until we hear from OPEC."
The Organization of the Petroleum Exporting Countries and Russia will meet on June 22 to decide whether to increase production following a fall in global inventories as world demand outstrips supply.
U.S. sanctions on Iran are also threatening to reduce oil exports from the OPEC producer.
The United States government has unofficially asked Saudi Arabia and some other OPEC producers to increase output, sources said on Tuesday.
"At the moment, the oil price is being driven by OPEC and views on how much and how quickly 'OPEC plus' will raise output," Energy Aspects analyst Virendra Chauhan said.
Reuters reported on May 25 that the producers were considering a supply increase of 1 million barrels per day, with a final decision to be made at the June meeting in Vienna.
Industry data from the American Petroleum Institute showed on Tuesday that U.S. crude inventories fell by 2 million barrels last week, compared with analysts' expectations for a draw of 1.8 million barrels.
Investors are waiting for the official inventories report to be issued by the U.S. Energy Department's Energy Information Administration at 1430 GMT.
(Additional reporting by Florence Tan in Singapore and Osamu Tsukimori in Tokyo; Editing by Dale Hudson and Jane Merriman)
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