It is not just the geological differences and challenges that explain why Russia and China are not today enjoying the shale revolution that is sweeping the US, according to Lukoil vice president Andrey Kuzyaev.

Russia's unconventional resources are 40% higher than those in the US and yet we have not produced 1 million tonnes, he lamented to delegates at a round-table session entitled 'Where should we look for new resources?' at the World Petroleum Congress in Moscow.

Kuzyaev