* Crude prices plummeted on swelling supply, trade concerns
* Asian refiners plan run cuts amid fuel glut
* OPEC cuts, Mideast tension prevent prices from falling further
By Henning Gloystein
SINGAPORE, May 24 (Reuters) - Oil markets stabilised on Friday amid OPEC supply cuts and tensions in the Middle East, after posting their steepest falls since the start of the year earlier in the week on the back of a global economic slowdown and swelling fuel inventories.
Brent crude futures, the international benchmark for oil prices, were at $68.05 per barrel at 0044 GMT, up 29 cents, or 0.4 percent, from their last close.
U.S. West Texas Intermediate (WTI) crude futures were up 36 cents, or 0.6 percent, at $58.27 per barrel.
“Multiple supply risks remain, as tension continues between Iran and the U.S., which could turn disruptive,” ANZ bank said on Friday.
The Organization of the Petroleum Exporting Countries (OPEC) has led supply cuts since the start of the year aimed at tightening the market and propping up prices.
ANZ said U.S. sanctions on Iran’s and Venezuela’s oil industries would likely further reduce crude exports from OPEC, of which both countries are members.
But Friday’s firmer prices could not make up the much bigger slumps from earlier in the week, which have put crude futures on track for their biggest weekly losses this year.
From mid-week, rising oil inventories in the United States started weighing on prices.
“Increasing (oil) inventories and slumping U.S. manufacturing activity exacerbated trade related concerns about global demand,” Michael McCarthy, chief market strategist at CMC Markets in Australia, said in a note, pulling WTI below $60 per barrel and Brent below $70 per barrel.
And the glut has spread beyond North America. Struggling to cope with oversupply from fuels, Asian refinery margins this week fell to their lowest seasonal levels since the financial crisis a decade ago, triggering plans for refinery run cuts.
“In China, gasoline stockpiles at seaports were seen rising to a multi-year high, this can shrink the margins for refiners and lead to softer oil demand from China,” ANZ bank said on Friday.
Reporting by Henning Gloystein; Editing by Joseph Radford