If the three countries refuse to join OPEC, they should reduce oil production, Khelil said.
"We don't need an agreement to stand by countries that share the same goal. If they have problems (joining OPEC), they should just apply their intended reductions," he said.
Russia, a top world oil producer, isn't a member of OPEC, but has held regular consultations with the organization.
Russian Deputy Prime Minister Igor Sechin last week said Moscow had prepared a draft memorandum on cooperation with the 13-member cartel.
OPEC secretary general Abdalla Salem El-Badri said Monday the cartel may decide on a "major" output cut when it meets in Oran, Algeria, on Dec. 17.
Oil prices have fallen under $50 a barrel.
Author: Ksenia Kochneva




