Oil prices forecast methods
There is a lot of literature on this question.

This review looks like a good place to start although it is from 2013. It looks at a wide range of both qualitative and quantitative approaches.


  Among them, the most frequently used technique is the time series econometrics in order to forecast the
  volatility of oil prices, the second frequently used is the financial method, the third frequently
  used methods are based on structural models and non standard computational models, and the
  least used technique is the qualitative knowledge based method