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London - World oil prices skidded lower on Thursday, reversing earlier gains as traders dwelled on rising US crude stockpiles and the stronger dollar.
At 13:45, US benchmark West Texas Intermediate (WTI) for delivery in October sagged 22 cents at $46.55 per barrel.
Brent North Sea crude for October delivery lost 20c to $48.85 a barrel compared with the close on Wednesday.
"It is the aftershocks of yesterday's disappointing oil report and the strengthening of US dollar that are helping to apply renewed downward pressure on crude prices," City Index analyst Fawad Razaqzada told AFP.
The stronger greenback makes dollar-priced crude more expensive for buyers using weaker currencies.
In turn, that tends to dampen demand and price levels.
The US energy department said on Wednesday that American crude oil inventories soared 2.5 million barrels last week, indicating poor demand.
Both main oil contracts plunged on the news, which confounded forecasts for a fall and fanned worries about the stubborn global supply glut.
Meanwhile, hopes for a deal to limit oil output were dealt a blow.
The commodity entered a bull market last week - a 20% rise from recent lows - and rallied for seven straight sessions thanks to news that export grouping OPEC and Russia would hold talks on output to address the oversupply crisis.
A report that Iran had seemingly changed its previous position to also consider limiting production provided further support last week.
However an Iranian oil ministry source told AFP Wednesday that Tehran has yet to decide whether to move towards a cap or even to attend the gathering in Algeria next month.
A previous OPEC attempt to freeze output collapsed in April largely because of Iran's refusal to join, having just emerged from international sanctions and keen to maximise its oil revenues.
"The market is possibly jittery (over the coming OPEC meeting)," Fat Prophets resource analyst David Lennox told AFP from Sydney.
"That's why we're seeing this sort of volatility because the market isn't quite sure what outcome to expect from next month's OPEC meeting."
