When the price of oil reached another record on Friday, at more than $126 a barrel, analysts pointed to attacks on pipelines in Nigeria and turmoil in Venezuela and Iraq as the immediate causes.
Even small disruptions to supplies from such places can cause the price to jump, because only Saudi Arabia has the capacity to replace the lost production and it is disinclined to do so.
But to understand how supplies became so scarce in the first place, one must look at the state of the oil industry in Russia, the world's second-biggest producer.
Over the past seven years, according to Citibank, Russia accounted for 80 percent of the growth in oil production outside the Organization of Petroleum Exporting Countries. The increase in the early part of the decade matched the growth in demand from China and India almost barrel for barrel.
Yet in April, Russian production fell for the fourth month in a row. It now is more than 2 percent below the peak of 9.9 million barrels a day reached last October. Before that, growth in Russia's output had steadily slowed, suggesting that the drop is not a blip.
Leonid Fedun, a vice president of Lukoil, a local oil firm, said Russia's production never will top 10 million barrels daily. The discovery that Russia no longer can be relied upon to cater to the world's ever-increasing appetite for oil is naturally helping to propel prices to record levels.
Oil and gas have been the foundation of the regime of Vladimir Putin, Russia's outgoing president, and are also a preoccupation of his successor, Dmitry Medvedev, who was chairman of Gazprom, the state-controlled gas giant.
The flow of petrodollars has created a sense of stability, masked economic woes and given Russia more clout on the world stage. Yet the malaise afflicting its most important industry is almost entirely man-made.