OPEC basket prices for fourteen crudes stood at $64.35 a barrel on Tuesday.
This a 37 cents fall compared with $64.72 the previous day, according to OPEC Secretariat calculations.
OPEC Reference Basket of Crudes (ORB) has the following: Saharan Blend (Algeria), Girassol (Angola), Djeno (Congo), Oriente (Ecuador), Zafiro (Equatorial Guinea), Rabi Light (Gabon), Iran Heavy (Islamic Republic of Iran), Basra Light (Iraq), Kuwait Export (Kuwait), Es Sider (Libya), Bonny Light (Nigeria), Arab Light (Saudi Arabia), Murban (UAE) and Merey (Venezuela).