Vienna, Rabi'I 27, 1439, Dec 15, 2017, SPA -- The price of OPEC reference basket, comprising 14 different crudes, stood at $60.87 a barrel on Thursday, compared to $61.50, in the previous day, OPEC Secretariat calculations announced here today, according to the Emirates' official news agency: WAM. The reference basket is, namely, made up of the following crudes: Murban (UAE), Saharan Blend (Algeria), Girassol (Angola), Oriente (Ecuador), Zafiro (Equatorial Guinea), Rabi Light (Gabon), Iran Heavy (Iran), Basra Light (Iraq), Kuwait Export (Kuwait), Es Sider (Libya), Bonny Light (Nigeria), Qatar Marine (Qatar), Arab Light (Saudi Arabia), and Merey (Venezuela). -- SPA 18:43 LOCAL TIME 15:43 GMT www.spa.gov.sa/w564119