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,
Brass River to the Santa Barbara River. The name was used specifically for Twon village on the Brass river, the route to the Nembe capital in the interior. In the 1884 and 1886 treaties "Brass" referred to the Nembe state. The Brass river was also called the Rio Bento, or St. John river. The Brass River is a branch, or distributary, of the Nun River, which flows to the west. The Nun River is itself a continuation of the Niger River, which divides into the Nun and Forçados Rivers about downstream from Aboh. The Brass leaves the east side of the Nun