(EnergyAsia, June 21) — Russia-based Sakhalin Energy said it has resumed oil production off Sakhalin Island with the opening of the seventh crude oil production season.   Oil is produced at the Vityaz production complex at the Astokh feature of Piltun-Astokhskoye (PA) oil field. Due to severe climatic conditions in the Okhotsk Sea, Vityaz production…