DEEP OPPORTUNITY - ERHC Providing Deep Opportunity to the Oil and Gas Industry. A proud sponsor of Nigeria Oil & Gas 2010, ERHC is a visionary independent oil and gas company that identified the possibility of significant reserves in the Gulf of Guinea more than a decade ago. Today, with established formal relationships with experienced exploration and production companies including Addax Petroleum and Sinopec, ERHC is poised to realize the value of its assets in the Joint Development Zone and the São Tomé and Príncipe Exclusive Economic Zone. Deep opportunity, indeed. Visit us at Booth E06.