Oil and gas industry in Nigeria. Oil and gas companies in Nigeria contribute greatly to federal government revenues; it also provides more than 65% of budget funds for Nigeria. Nigeria is the biggest exporter of oil and gas in Africa. In this article, we present the top 7 highest paying oil and gas companies in Nigeria based on our research: TOTAL: Total Upstream (Total Exploration & Production) is the highest paying oil and gas company in Nigeria. An entry level graduate earns more than N25,000,000 per annum as gross pay. Top 100 Best Companies To Work In Nigeria. 5. AGIP: Italian giant, Agip (or NAOC – Nigeria Agip Oil Company), pays entry level recruits more than N18,000,000 per annum. 6. ADDAX: The Chinese multinational oil company is the highest paying non-IOC in Nigeria. It come next to the big 5.