A guy I know is an exec for an oil company, and we were talking about this a few days ago. Here's what he told me. The reason that oil prices are so low right now is that OPEC is trying to eliminate the competition. For decades they have been able to dictate price. Other oil producing countries have been threatening their control. They are lowering prices to squeeze them out. Yes, it will hurt OPEC, but it is hurting a lot of their competitor's economies, especially Russia's. It will hurt smaller OPEC members in South America too. It seems like they are going to sacrifice these countries by imploding their economies so they can regain control. Messing with Russia in this way is pretty scary.
http://www.dailyfinance.com/2014/12/24/oil-price-decline-could-cost-opec-257billion-2015/
"The Only Way for OPEC to Fix the Problem
OPEC is really stuck between a rock and a hard place when it comes to oil prices. If it cuts production, this could raise prices temporarily, but producers in the U.S. and around the world would go back to drilling as they've done in the last few years, and long-term, OPEC would lose market share and power.
The other option is to stay the course and try to get U.S. shale producers, Russia, and other marginal producers to give up drilling new wells, maintaining OPEC's market share long-term. This is short-term pain for a long-term gain, but not all OPEC suppliers can withstand low oil prices for long.
Venezuela, Iraq, and Ecuador rely on high oil revenues to fund their governments, and low oil prices could increase instability in those regions. All three were running fiscal deficits in 2013, so 2015 will be a terrible year if prices stay low. Fiscal deficits can increase borrowing costs and lead to inflation, among other negative side effects, some of which we've already seen in Venezuela."