The deal, which is expected to close by year's end, will double Anadarko's stake in the Lucius development to about 49%, and will also roughly double the company's US Gulf production to about 155,000 net barrels of oil equivalent per day, of which 85% is oil.

"This immediately accretive, bolt-on transaction strengthens our industry-leading position in the Gulf of Mexico and is a catalyst for the company's oil-growth objectives, with quality assets being acquired at an attractive price to create significant value," chairman and chief executive Al Walker said.

Anadarko