RTRS - SAUDI, RUSSIA, QATAR, VENEZUELA OIL MINISTERS EXPECTED TO HOLD NEWS CONFE RTRS - SAUDI, RUSSIA, QATAR, VENEZUELA OIL MINISTERS EXPECTED TO HOLD NEWS CONFERENCE SOON IN DOHA - SOURCES --> RTRS - RUSSIAN OIL INDUSTRY SOURCE ON TALKS IN DOHA : TOO EARLY TO TALK ABOUT ANY DECISION