How the coming home heating crisis could threaten the grid

…The crux of the matter is that North American natural gas production has been stuck on a plateau fluctuating between 26 and 27 trillion cubic feet of production annually since 1998. But, it’s not for lack of trying. From a low in early 1999 of 397 active gas drilling rigs in Canada and the United States combined, the count has vaulted to 1,753 active gas rigs for the week just ended. And, the high rig count is not just a recent phenomenon. Combined gas rig counts first reached 1,000 in the year 2000 and fluctuated between about 700 and 1,300 from then until mid-2005. At that point they broke through the 1,300 level and never looked back. The simple fact is that natural gas in North America is getting harder to find; and when we do find it, it is coming in smaller quantities that flow at slower rates than in the past. That’s why we are having to drill so many wells just to run in place.

All of this might not seem so desperate were it not all but certain that at some point natural gas production will start to fall, perhaps precipitously so. Oil fields over their lifetime generally exhibit gradually rising and falling production which looks like a bell curve on a graph. However, gas fields quickly reach a plateau in production (usually determined by what a pipeline can carry), remain on the plateau for a time, and then fall off very quickly once the decline starts. The plateau pattern is followed by what can only be described as a cliff.

(Even before gas production begins to fall, North America’s limited natural gas storage capacity could result in a winter heating crisis. Natural gas is now extensively used to generate electricity for which demand peaks during the air conditioning season. Therefore, it is conceivable that a hot summer followed by an unusually cold winter could bring storage down to dangerously low levels. Another peril is a strong hurricane in the Gulf of Mexico that does extensive damage to the natural gas infrastructure there.)

Resource economist Douglas Reynolds, a specialist on North American natural gas, has told me that once the natural gas decline begins, he expects a 5 percent per year drop-off in total production. Reynolds believes such a drop could begin as soon as this year. While imports of liquid natural gas (LNG) could ease the situation, the U. S. currently has only five such ports, and Canada does not anticipate opening any until 2011.

…So, this raises a second question: Will there be enough electricity for all those who want it? The short answer from Toronto is “no.” Based on my admittedly rough calculations for the United States, the answer may be “no” here as well. If Americans who heat with natural gas substituted electricity for a mere quarter of their home heating, they would add about 6 percent to total electrical demand. Doesn’t sound like much, does it? However, that 6 percent would not be added continuously throughout the year, but concentrated in the coldest months. That could cause a pronounced spike in demand, especially during deep freezes. Add to this the fact that about 20 percent of U. S. electricity is generated from natural gas-fired power plants that will be competing with homeowners for the same dwindling supplies of natural gas.

Energy Bulletin