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 of Fernando Po, concluded a treaty with the kings of the territories adjacent to the Brass River. They agreed to stop the slave trade, and agreed on pilots' fees, duties and other terms of trade. Hutchinson reported of a visit to Brass on 9 July 1857, In 1847 the new partnership of Stuart and Douglas bought a 282-ton barque, the "Adriana", and sent it to the Brass River. Their agent was told to offer the local chiefs a share of the profits from palm oil trading on condition they stopped trading in slaves. This was the start of a lucrative