The exploration, production and transportation assets are situated along the NOGAT pipeline in the Dutch North Sea and own 3.3 million barrels of oil equivalent a year in equity oil and gas production, GDF Suez said in a statement.
NAM was reported earlier this year to be considering reopening more oilfields as oil prices remain above $100 a barrel.
GDF Suez shares were 0.1% firmer at €37.305. (Reuters)