The price of Russian Urals Crude has fallen to under $100 a barrel after over a weak of weakening value.
President Putin has used $114 a barrel in efforts to balance the budget.
The falling price comes as military spending is being increased and western sanctions are taking effect on the economy.
The restrictions, placed by the US and EU in response to the crisis in Ukraine.
Russia depends on energy and energy taxes for half of its $2 trillion budget.
Oil prices are generally dropping despite troubles in Russia and Iraq.
http://www.neurope.eu/article/russian-oil-drops-below-100barrel