Equinor has hired Standard Chartered to assist in a sale of the Norwegian energy major’s stake in an offshore oilfield in Nigeria, industry sources told Reuters on Wednesday, in what could be the latest attempt of a major oil firm to divest operations in the African OPEC member. The potential sale of Equinor’s 20% stake in the Agbami field offshore Nigeria could fetch up to $1 billion, according to Reuters’ sources. Equinor is reportedly looking to sell its Nigerian oilfield stake to focus on more profitable and newer…