(MENAFN- Khaleej Times) Opec oil output rose for a second straight month in September, a Reuters survey found on Monday, led by increases in Nigeria and Iran despite ongoing cuts by Saudi Arabia and other members of the wider Opec+ alliance to support the market.

Last month, the Organisation of the Petroleum Exporting Countries pumped 27.73 million barrels per day (bpd), the survey found, up 120,000 bpd from August. Production in August had risen for the first time since February.

The rise in September was led by Nigeria, which has been battling with crude theft and insecurity in its oil-producing region. Iran, which has been boosting supply despite US sanctions, also pumped more, with output hitting the highest level since 2018.

Nigeria managed a sizeable boost in exports in September without any major disruption to shipments, according to shipping data and sources in the survey, increasing output by 110,000 bpd. The country is targeting a further recovery by next year.

The second-largest increase came from Iran, the survey found, which pushed output to 3.15 million bpd. This is the highest since 2018, the year Washington re-imposed sanctions on Iran, according to Reuters surveys and separate figures from Opec.

Analysts have said the higher Iranian exports appear to be the result of Iran's success in evading US sanctions and Washington's discretion in enforcing them as the two countries seek better relations.

Output from the 10 Opec members that are subject to Opec+ supply cut agreements rose by 80,000 bpd, the survey found. Saudi Arabia and other Gulf members maintained strong compliance with agreed cutbacks and extra voluntary reductions.

Top exporter Saudi Arabia kept August and September output close to 9 million bpd, the survey found, as the country extended a voluntary 1 million bpd output cut to provide extra support for the market.

Iraq and the UAE increased output slightly, while Angolan supply showed the largest decline in the group of 50,000 bpd due to a drop in exports.

Opec's output is still undershooting the targeted amount by about 700,000 bpd, mainly because Nigeria and Angola lack the capacity to pump as much as their agreed level.

The Reuters survey aims to track supply to the market. It is based on shipping data provided by external sources, Refinitiv Eikon flows data, information from companies that track flows such as Petro-Logistics and Kpler, and information provided by sources at oil companies, Opec and consultants.

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