The Lunskoye-A platform (LUN-A) is Russia's first offshore gas production platform and the main gas producer of the Sakhalin-2 project. It is located 15 km offshore the north-eastern coast of Sakhalin Island in the Lunskoye field, where gas production began in 2008. That is when the first gas from the platform started flowing into the project's pipeline system.
The topsides of the platform were designed in South Korea and installed on a prepared concrete gravity base with four legs, allowing for year-round operation in severe climatic, wave and ice loads. Friction pendulum bearings are installed on the legs to provide for movement of the topsides during seismic activity, thus protecting them from damage.
Each of the four legs supports an integrated structural deck, performing additional process functions: the south-eastern leg serves as a well compartment; the north-eastern leg is used for pipeline risers; the other two legs accommodate auxiliary equipment. The equipment inside the legs is protected from freezing by internal heating systems.
The topsides contain equipment and systems for drilling, distribution of hydrocarbons and liquids, chemical storage, and an accommodation block.
Despite the existing systems and equipment on the platform, all major processes associated with the processing of hydrocarbons for further transportation to the south of Sakhalin take place at the Onshore Processing Facility, where the multiphase hydrocarbon mixture is delivered via two multiphase export lines.
The LUN-A platform’s daily design capacity is 6.8 Kt (50 Kbbl) of liquid and condensate and 52.5 MMcm of gas.