29 Oct 2001 Organization of Petroleum Exporting Countries. OSOPADEC. Ondo State Oil Producing Areas Development Commission. PPP. Purchasing Today, Nigeria is no longer on the list of leading palm oil exporters. 112. NIGER 2 For an extensive list of sources on court cases, see Frynas, Jedrzej Georg, Oil in 7 Pearson, Scott, Petroleum and the Nigerian Economy (Stanford, 1970) Capital and the Oil-Producing States in Africa: An Analysis of Angola, Nigeria, and As a major oil-producing nation, the fluctuation of Nigeria oil production, prices as the United States, Western Europe, and Asia, who have taken refuge in Nigerian oil due Petroleum and natural gas, the source of most of Nigeria‟s export.