The price of 13 crude oil samples stood at 101.04 dollars per barrel as at Wednesday.
This is against the 106.41 dollars per barrel recorded on Tuesday, the Organisation of the Petroleum Exporting Countries (OPEC) said on Thursday.
The OPEC Reference Basket of Crudes (ORB) comprises Saharan Blend (Algeria), Girassol (Angola), Djeno (Congo), Zafiro (Equatorial Guinea), Rabi Light (Gabon), and Iran Heavy (Islamic Republic of Iran).
Others are Basrah Medium (Iraq), Kuwait Export (Kuwait), Es Sider (Libya), Bonny Light (Nigeria), Arab Light (Saudi Arabia), Murban (UAE), and Merey (Venezuela).