Sakhalin Energy has selected a non-conventional cutting-edge completion approach to maximize recovery of the Lunskoye and Piltun-Astokhskoye fields. The original Piltun-Astokhskoe field development strategy included multiple oil zone commingled single completions and smart water injectors. Smart injectors allow selectively inject into up to four separate zones through a single 140 mm (5.5”) completion string. Every zone is isolated with a packer, has a surface-controlled downhole flow-control valve and a pressure-temperature gauge.