A new phrase, “supply shock,” entered the lexicon of the global oil business this week when the International Energy Agency reported that unexpectedly rapid growth in tight oil production from North Dakota and Texas is leading to profound changes in the global energy markets.

U.S. oil production which grew by 800,000 barrels a day (b/d) last year is now expected to grow by another 2.3 million b/d by 2018. In addition another 1.3 million b/d increase from Canada’s oil sands is expected. This 3.9 million b/d accounts for nearly half of the 8.4 million b/d increase in global production of combustible liquids that the IEA is expecting to be available by the end of the decade.

This rapid increase in North American oil production is expected to outrun the growth in global demand during the next few years, which is forecast to grow at about 900,000 b/d annually – at least in the near term. This implies that the demand for OPEC oil exports during the next five years is likely to be weaker than had been expected. The Agency predicts that OPEC will gain an additional 2 million b/d increase in its spare capacity during the next few years. Growth in the domestic oil supply has already resulted in major reductions in US imports from West Africa which are now flowing to China and other Asian nations.

Needless to say, these new forecasts have the U.S. financial press in ecstasy with predictions that the U.S. will soon become the world’s largest oil producer and could be energy independent by 2020 – if you throw in Canadian tar sands production and lots of pipelines to the south. Some even have US output reaching an all-time high of 11.9 million b/d by 2018. There is a growing consensus that we won’t have to worry about all those petty sheiks and dictators controlling our gasoline, and we can all forget about oil shortages and perhaps even high prices – at least for the next five years.

Now all this is probably good news for it gives the world’s oil situation a few years of breathing space; helps the U.S. balance of payments; creates jobs; and unless you live downstream from some of the fracking operations or note the ever increasing buildup of CO2 in the atmosphere you should probably be happy with the news.

Like with most things, however, there is another side to the story – for simply talking about a few years of rapid increases in U.S. oil production does not tell the whole tale. As we should all know by now, oil obtained from hydraulic fracturing and from Canada’s tar sands is very expensive oil. As time goes on it will become still more expensive for the best spots are exploited first and costs of production will continue to increase. The only reason we can afford to exploit tight oil and tar sands oil is that prices have been holding close to $100 a barrel in recent years.

We should also all be aware that tight oil wells dry up much faster than conventional ones. The best forecasts by independent geologists, that are free to talk about their findings, is that America’s tight oil bubble only has another three or four years to run and that production will peak at about 2.3 million b/d circa 2017. This says that in four or five years US tight oil production will start to decline, unless somebody can work out the issues involved in exploiting the tight oil that is reported to be under California – a decidedly different place to drill wells than in North Dakota or south Texas.

In addition to production and the cost of oil, there are at least three other factors that could overwhelm the significance of a few million barrels of increased U.S. production. The rapidly deteriorating Middle Eastern situation is number one. Some 20 million b/d of the global oil supply currently comes from the region, and nearly all of the oil region’s oil exporters have a finger in the current turmoil.

The next issue is the condition of the global economy over the next few years. Europe is in bad shape and, except for the occasional flurry of optimism, the U.S. is really not doing much serious “recovering.”

Our last major issue is emissions from the combustion of fossil fuels which has two parts – hazardous particulate matter in the air and the continuing atmospheric CO2 buildup which has now hit an extraordinary 400 parts per million.

While most developed countries have taken steps to ameliorate the dirty air problem in recent decades, the Chinese have largely ignored air quality in their quest for high rates of economic growth. The situation in Chinese cities has become so bad that Beijing now seems on the verge of foregoing some growth in favor of cleaner air. How this will play out in terms of China’s consumption of fossil fuels in the coming decade remains to be seen, but the spectacular annual increases in oil consumption may be slowing soon.

Of even more importance are the CO2 emissions which many believe are behind the increasing unstable weather besetting the world in recent years. While the simple answer to this is major reductions in the combustion of fossil fuels, for now global sentiment clearly favors increased consumption of fossil fuels as a means of maintaining and improving lifestyles. Just when atmospheric conditions become so bad globally that sentiment changes will be one of the major issues of the next decade.

Don’t break out the champagne just yet. The fundamental premise of peak oil that the world’s supply of affordable oil is limited and will become increasingly scarce is still alive and well. Gas prices are unlikely to go down very much and in a few short years, or less if the Middle East blows up, we will be back to worrying about shortages.

Tom Whipple is a retired government analyst and has been following the peak oil issue for several years.