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


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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.

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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

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Exxon Neftegas Limited is a recognized leader in the use of advanced technologies for developing offshore fields efficiently and safely in challenging conditions such as these.

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Project history

Sakhalin-1 milestones and accomplishments

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The Sakhalin-1 Project, operated by Exxon Neftegas Ltd, is one of the largest international investments in Russia and is an excellent example of the multi-faceted benefits that can be provided by a successfully developed and operated world-class oil and gas project in Russia.

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

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

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