What is the given state’s policy on ensuring the continued supply of oil to the world?

What is the given state’s policy on ensuring the continued supply of oil to the world? How far is it likely to go to ensure this access and what multilateral approaches would it undertake to supplement other approaches to such a blockage? Where does the state traditionally obtain its oil supplies, what short-term alternatives exist, and how self-sufficient is the state? Is the state likely to gain or lose in the event of a sudden shortage in the supply of oil, and is it a member of OPEC?