1- It depend where you live. In the US, the dollar is stronger now that during this past summer. It cost less to import oil from other countries. I know that the US are not importing all the oil they use but this still has an effect.
2- Also, the economic growth is slowing down in major countries like China and Germany (to name only 2). The German economy could face a recession soon if things do not change.
3- The US, and Canada also are producing more oil. Some of this oil come from the states like Dakota. It is considered unconventional oil and it is taking a larger share of the market than before. the oil production of the US could rise in the next year with these new sources of oil. In Canada, we have problems exporting the oil from the tar sands. Either it's a good or bad thing, I'll let you decide but there are problems related to the exportation of Canadian oil and this could also have an impact on prices. We have oil, but we can't transport it. This could create a surplus of the local market but I'm not really sure if it's the case.