 "A general view of a crude oil importing port in Qingdao, Shandong province")
Oil hovered around one-month lows on Monday as investors ditched some of their bullish bets on another price rise and the chances that top exporters will agree to rein in overproduction appeared to fade.
Iran will continue increasing oil production and exports until it reaches the market position it enjoyed before the imposition of sanctions, Oil Minister Bijan Zanganeh was quoted by the semi-official Mehr news agency as saying.
Read more from our special coverage on "OIL"
Saudi Arabia, which spearheaded an initial proposal in February for producers to limit output, said last week it would not join any effort to do so unless Iran were on board, while Russia reported its highest oil production in 30 years.
This has cast doubt on the ability of the world's largest exporters to reach any such agreement when they meet this month in Doha to discuss how best to align global supply and demand.
Hedge funds last week cut their bullish holdings of crude oil futures for the first time in six weeks.
Brent crude futures were 1 cent higher on the day at $38.68 a barrel by 1030 GMT, around their lowest for a month, but still 40% above where they were in mid-February.
US crude futures were 8 cents lower at $36.71 a barrel.
"It's not very strange to see a wave of profit-taking and some unwinding of long positions, and some people even saying they could reposition for a move towards lower prices," ABN Amro chief energy economist Hans van Cleef said.
"That's part of a normal cycle that I think can continue this week, we might see $36 or $37. Prices are coming down because of speculation Saudi Arabia will not join (the freeze deal) and that's probably what we'll see over the next three weeks - more speculation and more verbal intervention," He said.
Oil prices have fallen more than 65% since mid-2014, when booming US shale oil output and supply from within and outside OPEC created one of the largest global surpluses of crude in modern times.
US production is proving more resilient to low oil prices than many expected, despite steep cuts in drilling for new reserves as well as a jump in bankruptcies.
"The current rig count implies US production would decrease by 705,000 barrels per day yoy (year-on-year) on average in 2016, and by 375,000 barrels per day yoy in 2017," Goldman Sachs said.
