"Judging by the customs statistics, some of the benefit was captured by refiners in India and China, but the main beneficiaries must be oil shippers, intermediaries and the Russian oil companies," he added.
As a further complication, some Russian oil grades, including Pacific grade ESPO, are also worth more than Urals.
After decades of low profits or losses, sections of the global shipping industry are enjoying a financial boom from moving Russian oil.
A year ago, a similar journey would have cost a seller of Russian oil $0.5-$1.0 million depending on shipping rates.
Nayara is 49%-owned by Russian state oil major Rosneft, run by Putin's ally Igor Sechin, meaning some of the profits are indirectly captured by Russia.