Understanding whether propane production is up or down over the past few months is a bit more difficult than you might think, depending on which set of EIA numbers you choose to look at. The U.S. Energy Information Administration provides monthly numbers on the last day of the month lagged by about two months, and weekly numbers on Wednesdays, lagged by only five days. Both time series are closely watched by the propane market to assess the availability of supply for retail customers, petrochemical feedstock demand, and exports. Usually, these two sets of numbers move in tandem. But not always. The monthly numbers show production down by about 70 Mb/d from April to June, which is what you would expect given what was happening with crude and gas production at that point in time. Yet EIA weekly production numbers showed production increasing by about 90 Mb/d for the same period. So which way is propane production really trending? If you want to understand what’s going on, and you don’t mind delving into some deeply wonky NGL analytics, hang on for today’s blog.

