Saudi denial of oil tankers entering a Yemeni port brought the Yemeni conflict to the fore in the oil sector. While the oil implications are negligible, the movement of the conflict towards the sea raises the potential for an accidental incident leading to direct conflict between the Saudi coalition and Iran, and the U.S.
The Syrian ceasefire agreed by Russia and the U.S. could lead to a stabilization of some portions of Syria and reduce the chances of direct clashes between Russian and American aircraft, but it does not appear that enough of the important factions are currently satisfied with their positions to lay the groundwork for a larger, negotiated settlement.
Libya will not solve its own problems in 2017. And although international actors, including the US and Russia, have military presence in the country, their influence will not the tip scales toward national resolution or in favor of any faction. Continued violence and the undermining of the National Oil Company will keep oil production fluctuating between 400,000 b/d and 800,000 b/d for the foreseeable future.
Trump Administration statements after the missile strike on Syria indicated a broad change in policy regarding the future of the Assad regime in Syria. Whether this is followed by other military, economic, or political actions remains to be seen. But, we have entered a new era in the Syrian civil war, which signals a subtle but important change in the new Cold War in the Middle East.