IMO, things looking positive for the OPEC informal meeting:

Iran supports any move to stabilize oil market: Rouhani

http://www.cnbc.com/2016/09/18/iran-supports-...uhani.html

Oil Markets: Iran's New Message

http://www.forbes.com/sites/panosmourdoukouta...d41730fe57

OPEC May Hold Formal Meeting If Members Agree on Oil in Algiers

http://www.bloomberg.com/news/articles/2016-0...in-algiers

Saudi Arabia, Russia sign oil pact, may limit output in future

http://www.reuters.com/article/us-g20-china-s...SKCN11B0UF