Petroleum industry in Nigeria to transport the crude oil. Also because of the lack of highly productive fields, money from the jointly operated (with the federal government) companies is constantly directed towards petroleum exploration and production. Nigeria's petroleum is classified mostly as "light" and "sweet", as the oil is largely free of sulphur. Nigeria is the largest producer of sweet oil in OPEC. This sweet oil is similar in composition to petroleum extracted from the North Sea. This crude oil is known as "Bonny light". Names of other Nigerian crudes, all of which are named according to export terminal, are Qua Ibo, Escravos blend,
Nun River Nun River The Nun River is a river in Rivers State, Nigeria. The Nun is formed when the Niger River splits in two, forming the Nun and Forcados rivers. Upon emerging from its parent river, Niger, the Nun River flows for almost south to the Gulf of Guinea at Akassa. Its course runs mainly through thinly settled areas and swamps. In the 19th century, the Nun was a hub for trade between the Igbo Kingdom, which was based at Aboh, and Europe. The river's trading history began with the trade of slaves but was later replaced by palm oil export.