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About the project

Sakhalin-1 is comprised of Russian, Japanese, Indian and American participants and is operated by Exxon Neftegas Limited, a subsidiary of ExxonMobil.

Consortium members

Sakhalin-1 is an international consortium project comprised of the following participants:

  • Exxon Neftegas Limited, a subsidiary of U.S.-based ExxonMobil, is the operator and holds a 30 percent interest;
  • Russian oil company Rosneft acting via its affiliates RN-Astra (8.5 percent) and Sakhalinmorneftegas-Shelf (11.5 percent);
  • Japanese consortium SODECO holds a 30 percent interest; and
  • Indian state-owned oil company ONGC Videsh Ltd. has 20 percent.


Of all the global projects ExxonMobil is involved with, Sakhalin-1 is one of the most challenging.  The harsh arctic climate and difficult geographical conditions of Northern Sakhalin have required the use of unique technologies.

The Yastreb land rig was engineered exclusively for Sakhalin-1 and is one of the most powerful land rigs in the industry. It is designed to drill extended reach wells to offshore targets from land-based locations. State-of-the-art Extended Reach Drilling (ERD) technology reduced the high capital and operating costs of large offshore structures and at the same time minimized the environmental impact in this sensitive near-shore area.

When drilling, we use ExxonMobil proprietary technologies — Integrated Hole Quality (IHQ) technology and the Fast Drill Process. With IHQ, we are able to take into account a broad range of interdependent design variables including rock strength, stresses and well-bore hydraulics. Fast Drill, which is a unique energy-based analysis tool and work process, allows our rig personnel and engineers to maximize performance in every foot drilled.