When the price of oil reached another record on May 6th, of over $122 a barrel, analysts pointed to attacks on pipelines in Nigeria and turmoil in Iraq as the immediate causes. Even small disruptions to supplies from such places can cause the price to jump, since only Saudi Arabia has the capacity to replace the lost production, and it does not seem inclined 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% of the growth in oil production outside the Organisation of the Petroleum Exporting Countries. The increase in its output in the early part of the decade matched the growth in demand from China and India almost barrel for barrel. Yet in April, production fell for the fourth month in a row. It is now over 2% below the peak of 9.9m barrels a day (b/d) reached in October last year.
Before that, the growth in Russia's output had been slowing steadily, suggesting that the drop is not a blip. Leonid Fedun, a vice-president of Lukoil, a local oil firm, says Russia's production will never top 10m b/d. The discovery that Russia can no longer be relied upon to cater to the world's ever-increasing appetite for oil is naturally helping to propel prices to record levels.
In principle, Russia's bonanza could continue for years: it has the world's seventh-biggest oil reserves, at 80 billion barrels, according to BP, a British oil firm. And oilmen reckon there are 100 billion more barrels to find??the biggest exploration prize in the world?, in the words of Robert Dudley, the boss of TNK-BP, BP's Russian joint venture. But Russia has regulated the industry so poorly that production is falling despite the soaring oil price.
?Tax is the major impediment,? says Ms Redman. The government levies an export duty of 65% at prices over $25 a barrel. Add to that various corporate, payroll and production taxes, oilmen complain, and the state creams off as much as 92% of profits. Executives at TNK-BP have argued that rising costs across the oil industry will make many investments in Russia unprofitable unless the tax regime is changed. As it is, TNK-BP accounts for a fifth of BP's production, but only a tenth of its profits.
The government does offer tax breaks on production from older fields. So oil firms, naturally, have been concentrating on squeezing as much oil as they can out of those. Until recently, that was an obvious priority anyway, since fields that had fallen into ruin after the collapse of the Soviet Union in the early 1990s could be revived relatively easily and cheaply.
By mapping existing fields more precisely, installing new pumps and injecting water and chemicals into wells to maintain pressure, private oil firms were able to raise Russia's production from 6m b/d to almost 10m b/d, mainly from western Siberia. In 2003 alone, output jumped by 12%.
But this strategy is now yielding diminishing returns. Mr Fedun says the western Siberian fields have reached their natural limit. To keep production at today's levels requires ever more investment. To get Russia's output growing again, firms must make huge investments to develop new fields in remote provinces such as eastern Siberia and the Sakhalin region.
The government did provide some $4.5 billion in tax breaks last year. But this, the oil companies argue, is barely enough to keep production stable. In his inaugural speech to the Duma as prime minister on May 8th, Mr Putin said that taxes on the industry must be reduced.
However, new fields can take a decade to develop. The Kremlin has also failed to hand out exploration rights in the Arctic?the region oilmen consider most promising. And it says that in future the foreign firms with the expertise to tap offshore fields beneath frozen seas will be limited to minority shareholdings in big projects. ?Oil production will be whatever the government decides it to be,? says Mr Fedun.
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