Chayvo license block is being developed both from onshore and offshore facilities


In this section


Onshore Yastreb Drilling rig

Yastreb is one of the most powerful onshore drilling rigs in the Oil and Gas Industry and was designed to operate in the harsh conditions of northern Sakhalin, where winter lasts 5-6 months a year and temperatures drop as low as -40°C. Yastreb is completely enclosed, automated and can withstand severe earthquakes, which sometimes occur in the north of the island.

Yastreb is almost 70 meters high, equivalent to the height of a 22-story building and has an electric motor top drive capacity of 2,680 hp.

The Yastreb 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.

Extended reach drilling (ERD) technology reduces the high capital and operating costs of large offshore structures while minimizing environmental impact to sensitive near shore areas.

Yastreb has set a number of world records of measured depth, horizontal reach and other industrial records.

Offshore Orlan Platform

Oil and gas is also produced from the Orlan offshore platform. The structure made of concrete and steel is being used to develop the southwestern flank of the main Chayvo zone. Installation of the Orlan platform was completed in July 2005 and drilling operations commenced in December 2005. Production of 17 ERD wells is sent to shore for further processing at the Chayvo OPF.

In 2017 the well O-5RD with measured depth 15000 meters and horizontal reach 14,129 meters was drilled from the Orlan platform beating ENL drilling team’s previous achievements. O-5RD remains the current ERD drilling record holder for wellbore length.

Onshore processing facility

The Chayvo OPF is a heart of the Sakhalin-1 Project infrastructure collecting and processing production flow from all well sites. This facility is designed to produce stabilized crude oil which is shipped to the De-Kastri terminal for export, and natural gas which is either supplied to the Russian Far East customers, or injected back to maintain reservoir pressure. The OPF can produce over 300,000 barrels (over 40,000 metric tons) of oil per day.

Related content

Phases and facilities

Sakhalin-1's Chayvo, Odoptu, and Arkutun Dagi license blocks, located off the northeastern coast of Sakhalin Island in the Russian Far East, are being developed using a phased approach

Who we are Article


In December 2017, the Odoptu Stage 2 development entered into production phase to fully develop the field’s reserves

Who we are Article

Arkutun-Dagi: Berkut Offshore Platform

Arkutun-Dagi licence block is the most remote field of the Sakhalin-1 Project

Who we are Article

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.

Who we are Article