Dutch investment company Oranje-Nassau Groep BV, through its subsidiary Oranje-Nassau Energie BV, has acquired the offshore Gabon oil and gas assets of Devon Energy Corp., Oklahoma City, (NYSE: DVN) for US$205.5 million. The assets include an interest in the Kowe block, currently producing approximately 3,750 barrels of oil per day net. Also included are Devon's interest in the Agali exploration block and an option to earn an interest in the Gryphon Marin exploration block.