The move is the latest sign of tensions between global energy majors and national companies in resource-rich nations as low oil prices put more strain on state budgets which have ballooned over the past decade.
The dispute relates to a formula which determines how profit from the development is split between the companies and the government, Lukoil said in its financial report published on Monday, noting the parties were in talks on a possible settlement and it did not believe any settlement would have a material adverse effect on its finances.
It
