The term MENA is an acronym referring to the Middle East and North Africa region. The term MENA covers an extensive region, extending from Morocco to Iran, including all Middle Eastern and Maghreb countries.The term is roughly synonymous with the term the Greater Middle East.ccording to the Oil and Gas Journal (January 1, 2009), the MENA region has 60% of the world's oil reserves (810.98 billion barrels (128.936 km 3)) and 45% of the world's natural gas reserves (2,868,886 billion cubic feet (81,237.8 km 3)). As of 2011, 8 of the 12 OPEC nations are within the MENA region.