The Sakhalin-1 project involves development of three oil and gas fields, including Chayvo, Odoptu, and Arkutun-Dagi, located in extreme sub-Arctic conditions off the northeastern coast of Sakhalin Island in the Russian Far East.

The O-14 production well has been drilled to a measured depth of 13,500m and a horizontal reach of 12,033m using Orlan drilling platform in direction of the field’s south-eastern point.

Rosneft head Igor Sechin said: "This well continues successful implementation of our outstanding project. I would like to express my thanks to our partners – ExxonMobil. Usage of their drilling technologies made this achievement possible."

With the drilling completed, the Sakhalin-1 Consortium owns nine of the ten longest wells in the world.

The Sakhalin-1 project partners include Rosneft with 20% stake, ExxonMobil with 30% interest, Japanese consortium SODECO with 30% stake and ONGC Videsh with 20% stake.

The Sakhalin-1 project’s ultimate recoverable reserves are 236 million tons of oil and 487 bln m3 of gas.