Iran is making good progress in talks with Royal Dutch Shell PLC (RDSB) and Repsol SA (REP) on a key production and liquefaction scheme called Persian LNG, an Iranian news agency said Wednesday, quoting a top official.

"Negotiations with Shell and Repsol in recent weeks have gone in the desired direction and efforts are being made to take action as quickly as possible given the mutual interests in this field," Seifollah Jashnsaz, managing director of the National Iranian Oil Co., was quoted as saying by the ISNA agency.

The Persian LNG project consists in developing of the phases 13 and 14 of South Pars Gas field and the construction of two LNG trains each with a capacity of 8.1 million metric tons a year.

-By Benoit Faucon and Reza Amanat, Dow Jones Newswires; +44-20-7842-9266; benoit.faucon@dowjones.com