Abu Dhabi National Oil Co (Adenoc), the main exporter for Opec member the United Arab Emirates, will supply Murban crude at 5 percent below contracted volumes in January, the same as December. 

The producer will also cut supply for Umm Shaif by 5 percent and Upper Zakum by 3 percent, it said. 

Murban is the main export grade for the UAE. ADNOC produces most of the country's crude.