The move completes a first development phase that aims to boost production of heavy and high viscosity oil from the asset to about 12.5 million barrels per year.

Construction of the unit began after Lukoil experimented with steam-assisted gravity drainage in 2013 to recover oil from the Lyayelsky reservoir, located at a depth of about 200 metres, by drilling pairs of opposite wells with their horizontal sections running for 1000 metres.

Using