However, the talk yielded little information about the promise of oil output.
According to Reuters, the proposal to cut production by four percent will likely be raised on the eve of the November 30 OPEC meeting, where the cartel and other producers, including Russian Federation, will discuss joint action to stabilize prices.
The statement said the representatives expressed concerns about a "persistent oversupply" of crude, suggesting those at the meeting were not anticipating much change.
This is a critical time for the oil market, which is still under great pressure because of a large stockpile surplus, Barkindo said, according to a transcript of his speech posted on OPEC's website.
The OPEC includes 41 members; Kuwait, Saudi Arabia, the UAE, Qatar, Iran, Iraq, Venezuela, Gabon, Algeria, Ecuador, Angola, Indonesia, Libya and Nigeria.
"We have to agree on the real numbers", said Magsum Mirzagaliev, Kazakhstan's vice minister of energy.
The ministers of OPEC are set to meet by the end of November, trying to reach an agreement on curbing the group's output.
Indian Army: Four Pakistan posts destroyed in Keran sector, heavy casualties inflicted
Moreover, the Pakistan Army provided covering fire to the infiltrating terrorists in this incident, officials said. The terrorists mutilated his body and reportedly beheaded him before fleeing back to Pakistan-occupied-Kashmir.
The Organisation of the Petroleum Exporting Countries had agreed last month in Algiers to reduce their production of crude oil to a range of 32.50 million to 33 million barrels per day, OPEC's first output cut since 2008, in an effort to prop up prices. Friday's meeting of technical experts from members of the group was meant to finalize details of how those supply curbs would be shared.
On Saturday, no concrete output limits for non-OPEC countries were discussed, two participants said.
Mohammed Barkindo, Secretary-General of OPEC, warned of the potential repercussions of not reaching an agreement. The price recovery has already taken far too long and producers can't risk delaying it further, he said. Anything short of implementation of this Accord could lead to the elongation of the rebalancing process with further deterioration of financial conditions and setbacks in investments extending into a third year, which would be unprecedented.
"We should be calling for maximum commitment from all OPEC and non-OPEC countries" to the Algiers accord, Barkindo said.
The non-OPEC oil producers, who attended the Vienna meeting, put out roughly 19.6 mln barrels per day (bpd) in 2015 combined, half of the collective OPEC output that year.
Russia, which postponed its domestic production-cut meeting to a week before OPEC's meeting, expects a quick recovery in USA shale oil activity so that an output freeze could be short-lived, Interfax news agency reported.