LONDON, Nov. 25, 2016 /PRNewswire/ -- As OPEC oil ministers meet in Vienna on the 30 th November, the organization's credibility is on the line. Having spent most of the year in discussion, failure to announce an agreement would be remarkable given the reputations at stake. Our analysts from the S&P Global divisions offer their thoughts and insights to help understand the market implications of OPEC's decision: S&P GLOBAL PLATTSHerman Wang, OPEC Specialist, S&P Global Platts: "A deal may very well be likely given the lack of one would signal OPEC's diminished credibility and that several countries and OPEC officials have their reputations on the line. Whether the deal is merely face-saving or durable and significant is the key question. As always with OPEC, the details of the deal and how it is implemented will be key. That is because OPEC has no formal authority to enforce compliance. Whether non-OPEC producers choose to participate is even less within OPEC's control. On the one hand, a deal delivering at least 1m b/d cut with the added commitment of non-OPEC producers, particularly Russia, to join in to reduce or freeze production would have a profound impact on market balances and prices. On the other, a face-saving deal involving minimal cuts or a ceiling with no individual country quotas would essentially preserve the status quo of an over supplied oil market." Tony Starkey, Managing Director of Analysis, Platts Analytics, S&P Global Platts: "A cut to 33 million b/d probably maintains the status quo -- slowly returning rigs to active status as prices hover in a $50-$55/b range. If OPEC cuts to 32.5 million/d, then we expect prices to reach $60/b next year which should accelerate, to an extent, the already upward trend in drilling activity in the US. That said, a significant OPEC cut will drain supply much, much quicker than US shale can fill it, so while in the medium to longer term, a prolonged drop in OPEC supply would likely be somewhat filled by increasing US shale output, OPEC would likely succeed in supporting prices in 2017 with such a move. Meaningful increases in US shale output would likely not start to materialize until the latter part of next year in the presence of higher oil prices."