In its most recent monthly oil market report, the Organization of the Petroleum Exporting Countries (OPEC) raised its forecast for global oil demand growth by 70,000 barrels per day (bpd) to 5.95 million bpd.
The JTC meeting also expressed concern about rising COVID-19 cases in India, Japan and Brazil, the sources added.
"These disadvantages might include: weakening the immunity principle at a global level, putting at risk US interests overseas, and the protection for their personnel and assets," the letter said.
Barkindo said "several prominent US economic actors" had expressed reservations about the NOPEC bill, including the US Chamber of Commerce.
The short but intense falling out between two heavyweights in the 13-member cartel of oil-producing nations and its 10 affiliates threatened world crude storage capacity levels with cheap oil.
Demand will rise by 5.95 million barrels per day (bpd) in 2021, or 6.6%, the Organization of the Petroleum Exporting Countries forecast in its monthly report, up 70,000 bpd from last month.
OPEC raised its forecast of 2021 world economic growth to 5.4% from 5.1%, assuming the impact of the pandemic is "largely contained" by the beginning of the second half of the year.
"If a fulsome framework can be crafted in the coming weeks, significant quantities of Iranian oil will likely hit the market in H2 2021," RBC Capital analyst Helima Croft said in a note this week.
Stephen Innes, chief global markets strategist at Axi, said oil prices are expected to trade in a range between $60 and $70 as investors weigh these factors.
Brent crude futures lost 21 cents, or 0.3pc, to $62.53 a barrel by 11:15 a.m. EDT (1515 GMT) while U.S. West Texas Intermediate crude fell 25 cents, or 0.4pc, to $59.08.
The former Soviet republic will offset the overproduction in the summer, the ministry said, when some of the biggest oilfields are set to shut down for maintenance.