History of Onne Port Onne Port. The largest Oil and Gas free zone in the world supporting exploration and production for Nigerian activities, this port accounts for over 65% of the export cargo through the Nigerian sea port. Security/Safety of Onne Port This is a very safe location. What To Bring Before heading to Onne Port, here are some helpful things to take along with you: All your signed and stamped cargo documents Your ID card for identity and ownership proof Cash - in case of minor on-the-spot fees Best Features Serving as a hub for the West and Central African regions in Oil and Gas, it has an advantage of proximity to the Eastern commercial centres such as Onitsha, Nnewi, and Aba. It also has an adequate depth to accommodate heavy ocean-going vessels. The port is highly industrialized with modern facilities and equipment that can stand the test of time. Writer's Review It operates a one-stop shop solution to clients in which all operational needs are provided within the operational environment including office accommodation, catering and others. There is also guaranteed security.