The Pythoness of the Oracle of Delphi told to King Croesus that if he were to attack Persia "a great empire will be destroyed." Croesus did just that, but the great empire which fell was not the Persian one, but his own.
Do you remember the old Soviet Union? Dubbed as "The Evil Empire" by Ronald Reagan in 1983, it disappeared in a puff of smoke in 1991, crushed under a mountain of debts. The origins of the financial collapse of the Soviet Union are rather well known: it was related to the fall of the oil prices which, in 1985, went down from the equivalent of more than 100 (today's) dollars per barrel in 1980 to about 30 (today's) dollars and stayed low for more than a decade. The Soviet Union was relying on oil exports for its economy and, in addition, it was burdened with huge military expenses. It just couldn't take a drop of more than a factor of three in its oil revenues.


Today, Russia's oil production has recovered from the downfall of Soviet times and the Russian economy is highly dependent on oil exports, much like the old USSR was. So, a drop in oil prices could do a lot of damage to Russia. Given the political situation with the Ukraine crisis, there are speculations that the West is trying to bring down Russia by repeating the same trick that seemed to be so successful in bringing down the old "Evil Empire". Indeed, we are seeing oil prices dropping below $90 per barrel after years of stability around $100. Is it a fluctuation or a trend? Hard to say, but it is being interpreted as the unleashing of the "oil weapon" against Russia on the part of Saudi Arabia.
However, the world of today is not the world of the 1980s. One problem is that Saudi Arabia
has shown several times to be able to throttle production down, but
never to raise it significantly higher than the present levels; one
could even question whether they will be able to maintain them in the future. Then, there is nothing today which could play the role that Alaska and the North Sea fields played in the 1980s. It had been said many times that we would need a "new Saudi Arabia" (or more than one) to offset the decline of the world's oil fields, but we never found it.

Yet, there are good reasons to think that we could see a drop in oil prices in the near future. One factor is the downturn of several of the world's major economies (e.g. Italy). That could lead to a fall of the demand for oil and, consequently, to lower prices (something similar took place with the financial crisis of 2008). Another factor could be the rapidly growing production unconventional oil (largely in the form of "shale oil") is the U.S. This oil is not being exported in large amounts, but it has reduced the US demand of oil in the world's market. Coupling these two factors, we might well see a considerable drop in oil prices in the near future, although hardly a sustained one. So, would that be the "oil weapon" that will bring Russia to its knees? Maybe, but, as with all weapons, there are side effects to consider.

Yet, there are good reasons to think that we could see a drop in oil prices in the near future. One factor is the downturn of several of the world's major economies (e.g. Italy). That could lead to a fall of the demand for oil and, consequently, to lower prices (something similar took place with the financial crisis of 2008). Another factor could be the rapidly growing production unconventional oil (largely in the form of "shale oil") is the U.S. This oil is not being exported in large amounts, but it has reduced the US demand of oil in the world's market. Coupling these two factors, we might well see a considerable drop in oil prices in the near future, although hardly a sustained one. So, would that be the "oil weapon" that will bring Russia to its knees? Maybe, but, as with all weapons, there are side effects to consider.
As we said, unconventional oil is playing a major role in maintaining the world's production. The problem is that unconventional oil is often an expensive resource. Then, in the case of shale oil, the decline rate of wells is very fast: the lifetime of a well is of just a few years. So, the shale oil industry needs a continuous influx of new investments to keep producing and it is very sensitive to oil prices. Its recent rise was the result of high prices; low prices might cause its demise. In contrast, conventional oil fields have a lifetime of decades and are relatively immune to short term variations of oil prices. If we see the situation in these terms, we might legitimately ask against whom the oil weapon is aimed. The US unconventional oil industry might well be its first victim.
History, as we all know, never repeats itself, but it does rhyme. King Croesus, at his times, believed the Delphic Oracle when he was told that he could bring down a great empire if he would attack Persia. He didn't realize that he was going to destroy his own empire. Something similar may be in store for us in the coming years: a drop in oil prices might well bring down a great empire. Which one, however, is all to be seen.