The price for crude oil produced by the Organization of the Petroleum Exporting Countries (OPEC) fell by more than two U.S. dollars Thursday, data released by OPEC showed on Friday. One barrel (159 liters) of OPEC-produced crude stood at 131.03 Dollars Thursday, down 2.06 dollars from 133.09 dollars on the previous day. OPEC calculates an average basket price based on 13 important brands produced by cartel members, according to a report of DPA.