VIENNA — A meeting of major oil producers here in the Austrian capital has been dedicated to the theme of “cooperation for a sustainable future.” Soon after proceedings kicked off on Wednesday, though, the political tensions between them were laid bare.

For months, the world’s main exporters of crude, including Iran, Iraq, Russia and Saudi Arabia, have worked together to curb their output to bolster oil prices. The uneasy coordination among several longtime rivals has helped sharply increase oil prices and slash what had been enormous supplies of unsold crude piling up in storage.

But faced with angry broadsides from President Trump, who is seeking cooperation from Saudi Arabia to force gasoline prices lower ahead of midterm elections in the United States, that cooperation now looks to be fraying.



At a conference arranged by the Organization of the Petroleum Exporting Countries grouping in Vienna, Iran’s oil minister delivered blunt remarks arguing that it was Washington — and not OPEC — that was to blame for the high oil prices Mr. Trump has railed against.