Offshore Oil and Gas Production in Russia
Efficient implementation of the Sakhalin-1 project continued in 2019.
Rosneft is a member of the project within the consortium that includes ExxonMobil (United States), SODECO (Japan), and ONGC Videsh Ltd. (India). The Company’s share is 20%, and the project operator is Exxon Neftegas Limited.
The Sakhalin-1 project involves the development of four offshore fields: Chaivo, Odoptu-Sea, Lebedinskoye (within the Odoptu licence), and Arkutun-Dagi, located in the Sea of Okhotsk on Sakhalin Island’s north-eastern continental shelf.
State-of-the-art technologies and project management methods are used to develop the Chaivo, Odoptu-Sea, Lebedinskoye, and Arkutun-Dagi fields. At the Odoptu-Sea field, oil is produced from an onshore site using super-extended reach horizontal wells; at the Chaivo field, oil is extracted from an onshore site and the Orlan platform using wells with record-length boreholes; while Arkutun-Dagi is developed using Berkut, a fixed offshore platform that features the world’s heaviest upper structure.
Record-high output was achieved in 2019, when the Sakhalin-1 project produced a total of over 13,0 mmt of oil and gas condensate (Rosneft’s share was 2.6 mmt). Nearly 2.4 bcm of gas (with Rosneft’s share of 0.5 bcm) were supplied to consumers.
Oil from the Sakhalin-1 fields is delivered to the Chaivo onshore oil treatment facility on Sakhalin Island and then transported by pipeline to the De-Kastri oil export terminal in the Khabarovsk Territory.
Northern Tip of the Chaivo Field
Oil production at the northern tip of the Chaivo field involves five wells that have a unique, complex design and extended horizontal displacement. The wells are equipped with smart completion systems with flow control devices to limit gas breakthroughs and maximise production.
In November 2019, Rosneft achieved a milestone of 7 mmt of crude oil pumped out from the Chaivo field’s northern tip since the start of the project.
Odoptu-Sea Field (Northern Dome)
The Odoptu-Sea field (the Northern Dome) is Russia’s first offshore field brought on stream, flowing oil since 1998. The operator of the oil and gas field is RN-Sakhalinmorneftegaz.
The field’s infrastructure comprises oil and gas gathering and treatment facilities, a reservoir pressure maintenance system, outbound pipelines to transport oil, gas and water, and power generation facilities.
We continued to drill new production wells in 2019 in order to maintain the field’s recovery rates. Three production wells were drilled and put into operation. One of them is the longest horizontal well in this field. With a huge horizontal displacement, it is 8,699 meter deep. The previous record for well length at this field was set in 2011 at 8,119 meters.
Pilot operation of the offshore Lebedinskoye field in the Sea of Okhotsk began in 2015. It is operated by the Company’s subsidiary RN-Sakhalinmorneftegaz. Four production wells are used. Crude oil extracted from the Lebedinskoye field has a quality grade similar to Sokol crude.
Rosneft started production testing of its Novoye deposit in the Azov Sea in 2016. The field operator for both oil and gas production is Priazovneft, in which Rosneft holds 51%, while Lukoil owns a 49% stake. Field appraisal is underway alongside production. The drilling of Novaya-2 exploration well started in October 2019.