The U.S. electric power sector burned through a record amount of natural gas in recent weeks, a sign of the shifting power generation mix and also a signal that natural gas supplies could get tighter than many analysts had previously expected.
The EIA reported a surprise drawdown in natural gas inventories for the week ending on August 3. The reduction of 6 billion cubic feet (Bcf) was the first summertime drawdown since 2006. Natural gas spot prices shot up following the data release on August 4, although they fell back again shortly after.
Natural gas consumption patterns are much more seasonal than for oil. Demand tends to spike in the winter due to heating needs, and then drops substantially in the intervening months, particularly in the spring and fall. Between March/April and October/November, natural gas inventories build up as people need less heating, and that stockpiled gas is then used in the next winter.
So it comes as a surprise that after a record buildup in inventories this past winter, the summer has seen a much lower-than-expected buildup in storage. And last week’s drawdown, the first in over a decade during summertime, says quite a bit about the shifting energy landscape. The EIA says this is the result of two factors: higher consumption from electric power plants, and a drop off in production.
The U.S. is and has been in the midst of an epochal transition from coal-fired electricity to natural gas and renewables, a switch that will take many more years to play out. But the effects are already showing up in the power generation mix. Utilities have rushed to build more natural gas power plants over the past decade, and now with so many online, demand for gas has climbed to new levels.
Just a few weeks ago, on July 21, the U.S. burned through 40.9 billion cubic feet, the highest volume on record, according to the EIA. And in late July, the power burn exceeded 40 Bcf/d three times due to a hot weather. Nine of the ten highest power burn days on record took place last month, with the other one occurring in July 2015. Average consumption of 36.1 Bcf/d in July of this year was 2.7 Bcf/d higher than a year earlier, and 1.5 Bcf/d higher than the previous high reached in July 2012.