First Hydrocarbon Nigeria Ltd., a subsidiary of Afren PLC, said in a statement it bought a 45 percent stake in the field once held by the foreign firms.

The company said it hopes to get 40,000 barrels of oil a day from the fields in the next four years.

First Hydrocarbon Nigeria will partner with Nigerian National Petroleum Corp., which holds a 55 percent stake in the field.

The state-run company announced the sale in November.

Nigeria, an OPEC member, is a top crude supplier to the US.