Sakhalin-I

The Sakhalin-I (Russian: Сахалин-1) project, a sister project to Sakhalin-II, is a consortium for production of oil and gas on Sakhalin Island and immediately offshore. It operates three fields in the Okhotsk Sea: Chayvo, Odoptu, and Arkutun-Dagi. In 1996, the consortium completed a production-sharing agreement between the Sakhalin-I consortium, the Russian Federation and the Sakhalin government. The consortium was managed and operated by Exxon Neftegas Limited (ENL), a unit of ExxonMobil, until Exxon's withdrawal in March 2022 following the 2022 Russian Invasion of Ukraine. The Russian government froze Exxon's investment in August 2022 and ordered its transfer to a newly created Russian company the following October. Since 2003, when the first Sakhalin-1 well was drilled, six of the world's 10 record-setting extended reach drilling wells have been drilled at the fields of the project, using the Yastreb rig. It has set multiple industry records for length, rate of penetration and directional drilling. On 27 August 2012, Exxon Neftegas beat its previous record by completing Z-44 Chayvo well. This ERD well reached a measured total length of 12,376 meters (40,604 ft), making it the longest well in the world. In November 2017, the record well reached 15 kilometers (49,000 ft) long.